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Szatmáry Z, Bardet SM, Mounier J, Janot K, Cortese J, Perrin ML, Couquet C, Deniau G, Hauquier F, Migneret R, Guenin E, Maire M, Michel JB, Forestier G, Le Flahec A, Leger-Bretou C, Mounayer C, Chaubet F, Rouchaud A. Fucoidan-coated coils improve healing in a rabbit elastase aneurysm model. J Neurointerv Surg 2024; 16:824-829. [PMID: 37491380 DOI: 10.1136/jnis-2023-020596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Accepted: 07/13/2023] [Indexed: 07/27/2023]
Abstract
BACKGROUND Recanalization of coiled aneurysms remains unresolved. To limit aneurysm recanalization after embolization with coils, we propose an innovative approach to optimize aneurysm healing using fucoidan-coated coils. OBJECTIVE To evaluate the short-term efficacy and long-term safety of the new coil system with conventional angiography, histology, and multiphoton microscopy for follow-up of fibrosis and neointima formation. METHODS We conducted a feasibility study on rabbit elastase-induced aneurysms. Embolization was carried out with bare platinum coils, fucoidan-coated coils, or dextran-coated coils. Aneurysms were controlled after 1 month by digital subtraction angiography (DSA). Aneurysm samples were collected and processed for histological analysis. Aneurysm healing and fibrosis were measured by quantifying collagen according to the histological healing score by combining standard light microscopy and multiphoton imaging. We divided 27 rabbits into three groups: bare platinum group, fucoidan group, and dextran group as controls. RESULTS Angiographic grading showed a trend toward less recanalization in the fucoidan group, although there were no significant differences among the three groups (P=0.21). Histological healing was significantly different according to the presence of more collagen in the neck area of aneurysms in the fucoidan group versus the bare platinum group (P=0.011), but not in the dextran group. Histological index was significantly better at the aneurysm neck in the fucoidan group than in the bare platinum group (P=0.004). Collagen organization index was also significantly better in the fucoidan group than in the bare platinum group (P=0.007). CONCLUSION This proof-of-concept study demonstrated the feasibility and efficacy of treatment with fucoidan-coated coils to improve aneurysm healing. The results in this rabbit in vivo model showed that fucoidan-coated coils have the potential to improve healing following endovascular treatment.
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Affiliation(s)
- Zoltán Szatmáry
- Department of Interventional Neuroradiology, Limoges University, Limoges, France
- CNRS, XLIM, UMR 7252, Limoges University, Limoges, France
| | | | - Jérémy Mounier
- CNRS, XLIM, UMR 7252, Limoges University, Limoges, France
| | - Kevin Janot
- CNRS, XLIM, UMR 7252, Limoges University, Limoges, France
- Department of Interventional Neuroradiology, CHRU Tours CPU, Tours, France
| | - Jonathan Cortese
- CNRS, XLIM, UMR 7252, Limoges University, Limoges, France
- Department of Interventional Neuroradiology-NEURI Brain Vascular Center APHP, Hospital Bicetre, Le Kremlin-Bicêtre, France
| | | | - Cladue Couquet
- CNRS, XLIM, UMR 7252, Limoges University, Limoges, France
| | - Guy Deniau
- UMR CEA, CNRS 3685, NIMBE, LICSEN, Paris-Saclay University, Gif-sur-Yvette, France
| | - Fanny Hauquier
- UMR CEA, CNRS 3685, NIMBE, LICSEN, Paris-Saclay University, Gif-sur-Yvette, France
- Department of Chemistry and Health and Life Sciences, CNAM, Paris, France
| | - Rodolphe Migneret
- INSERM, UMRS 1148, LVTS, Paris, France
- Institut Galilée, Sorbonne North Paris University, Villetaneuse, France
| | - Erwann Guenin
- Laboratoire TIMR, Centre de Recherche Royallieu Rue du Dr Schweitzer - CS 6031960200, Compiègne, France
| | - Murielle Maire
- INSERM, UMRS 1148, LVTS, Paris, France
- Institut Galilée, Sorbonne North Paris University, Villetaneuse, France
| | | | - Géraud Forestier
- Department of Interventional Neuroradiology, Limoges University, Limoges, France
- CNRS, XLIM, UMR 7252, Limoges University, Limoges, France
| | | | | | - Charbel Mounayer
- Department of Interventional Neuroradiology, Limoges University, Limoges, France
- CNRS, XLIM, UMR 7252, Limoges University, Limoges, France
| | - Frederic Chaubet
- INSERM, UMRS 1148, LVTS, Paris, France
- Institut Galilée, Sorbonne North Paris University, Villetaneuse, France
| | - Aymeric Rouchaud
- Department of Interventional Neuroradiology, Limoges University, Limoges, France
- CNRS, XLIM, UMR 7252, Limoges University, Limoges, France
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Ali M, van Etten ES, Akoudad S, Schaafsma JD, Visser MC, Ali M, Cordonnier C, Sandset EC, Klijn CJM, Ruigrok YM, Wermer MJH. Haemorrhagic stroke and brain vascular malformations in women: risk factors and clinical features. Lancet Neurol 2024; 23:625-635. [PMID: 38760100 DOI: 10.1016/s1474-4422(24)00122-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 01/18/2024] [Accepted: 03/14/2024] [Indexed: 05/19/2024]
Abstract
Haemorrhagic stroke is a severe condition with poor prognosis. Biological sex influences the risk factors, presentations, treatment, and patient outcomes of intracerebral haemorrhage, aneurysmal subarachnoid haemorrhage, and vascular malformations. Women are usually older at onset of intracerebral haemorrhage compared with men but have an increased risk of aneurysmal subarachnoid haemorrhage as they age. Female-specific factors such as pregnancy, eclampsia or pre-eclampsia, postmenopausal status, and hormone therapy influence a woman's long-term risk of haemorrhagic stroke. The presence of intracranial aneurysms, arteriovenous malformations, or cavernous malformations poses unique clinical dilemmas during pregnancy and delivery. In the absence of evidence-based guidelines for managing the low yet uncertain risk of haemorrhagic stroke during pregnancy and delivery in women with vascular malformations, multidisciplinary teams should carefully assess the risks and benefits of delivery methods for these patients. Health-care providers should recognise and address the challenges that women might have to confront when recovering from haemorrhagic stroke.
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Affiliation(s)
- Mariam Ali
- Department of Neurology, Leiden University Medical Centre, Leiden, Netherlands.
| | - Ellis S van Etten
- Department of Neurology, Leiden University Medical Centre, Leiden, Netherlands
| | - Saloua Akoudad
- Department of Neurology, University Medical Centre Groningen, Groningen, Netherlands
| | - Joanna D Schaafsma
- Division of Neurology, Department of Medicine, University of Toronto, Toronto, ON, Canada
| | - Marieke C Visser
- Department of Neurology, Amsterdam University Medical Centre, Location AMC, Amsterdam, Netherlands
| | - Mahsoem Ali
- Department of Surgery, Amsterdam University Medical Centre, Location VUmc, Amsterdam, Netherlands
| | - Charlotte Cordonnier
- University Lille, Inserm, CHU Lille, UMR-S1172, Lille Neuroscience and Cognition, Lille, France
| | - Else Charlotte Sandset
- Department of Neurology, Stroke Unit, Oslo University Hospital, Oslo, Norway; The Norwegian Air Ambulance Foundation, Oslo, Norway
| | - Catharina J M Klijn
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Centre, Nijmegen, Netherlands
| | - Ynte M Ruigrok
- Department of Neurology and Neurosurgery, UMC Utrecht Brain Centre, University Medical Centre Utrecht, Utrecht, Netherlands
| | - Marieke J H Wermer
- Department of Neurology, University Medical Centre Groningen, Groningen, Netherlands
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3
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Liao J, Misaki K, Uno T, Futami K, Nakada M, Sakamoto J. Determination of Significant Three-Dimensional Hemodynamic Features for Postembolization Recanalization in Cerebral Aneurysms Through Explainable Artificial Intelligence. World Neurosurg 2024; 184:e166-e177. [PMID: 38246531 DOI: 10.1016/j.wneu.2024.01.076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 01/12/2024] [Accepted: 01/13/2024] [Indexed: 01/23/2024]
Abstract
BACKGROUND Recanalization poses challenges after coil embolization in cerebral aneurysms. Establishing predictive models for postembolization recanalization is important for clinical decision making. However, conventional statistical and machine learning (ML) models may overlook critical parameters during the initial selection process. METHODS In this study, we automated the identification of significant hemodynamic parameters using a PointNet-based deep neural network (DNN), leveraging their three-dimensional spatial features. Further feature analysis was conducted using saliency mapping, an explainable artificial intelligence (XAI) technique. The study encompassed the analysis of velocity, pressure, and wall shear stress in both precoiling and postcoiling models derived from computational fluid dynamics simulations for 58 aneurysms. RESULTS Velocity was identified as the most pivotal parameter, supported by the lowest P value from statistical analysis and the highest area under the receiver operating characteristic curves/precision-recall curves values from the DNN model. Moreover, visual XAI analysis showed that robust injection flow zones, with notable impingement points in precoiling models, as well as pronounced interplay between flow dynamics and the coiling plane, were important three-dimensional features in identifying the recanalized aneurysms. CONCLUSIONS The combination of DNN and XAI was found to be an accurate and explainable approach not only at predicting postembolization recanalization but also at discovering unknown features in the future.
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Affiliation(s)
- Jing Liao
- Division of Transdisciplinary Sciences, Graduate School of Frontier Science Initiative, Kanazawa University, Kanazawa, Ishikawa, Japan
| | - Kouichi Misaki
- Department of Neurosurgery, Kanazawa University, Kanazawa, Ishikawa, Japan.
| | - Tekehiro Uno
- Department of Neurosurgery, Kanazawa University, Kanazawa, Ishikawa, Japan
| | - Kazuya Futami
- Department of Neurosurgery, Hokuriku Central Hospital, Oyabe, Toyama, Japan
| | - Mitsutoshi Nakada
- Department of Neurosurgery, Kanazawa University, Kanazawa, Ishikawa, Japan
| | - Jiro Sakamoto
- Division of Mechanical Science and Engineering, Graduate School of Natural Science and Technology, Kanazawa University, Kanazawa, Ishikawa, Japan
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Zhong W, Zhang T, Su C, Zhou D, Zhuang J, Li M, Xu Y, Liu M, Zhang M, Wang Y, Wang D, Su W. Reconstructive endovascular treatment for basilar artery trunk aneurysms: complications and clinical and angiography outcomes. J Neurointerv Surg 2023; 15:1194-1200. [PMID: 36639233 PMCID: PMC10715499 DOI: 10.1136/jnis-2022-019864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Accepted: 01/02/2023] [Indexed: 01/15/2023]
Abstract
BACKGROUND Basilar artery trunk aneurysms (BTAs) are rare intracranial aneurysms. We aim to investigate the procedural complications and clinical and angiographic outcomes of BTAs treated with reconstructive endovascular treatment (EVT). METHODS We retrospectively reviewed the data of 111 patients with BTAs who underwent reconstructive EVT during 2013-2022. The factors associated with procedural complications and clinical and angiographic outcomes were analyzed. RESULTS The study included 81 men and 30 women (median age 60 years). Overall, 26 (23.4%) cases presented with subarachnoid hemorrhage and 85 (76.6%) presented with unruptured aneurysms. Periprocedural ischemic and hemorrhagic complications occurred in 29 (26.1%) and 4 (3.6%) cases, respectively. The rate of favorable clinical outcomes was 83.8% (92/111) and the mortality rate was 14.4% (16/111). Angiographic follow-up data were available for 77/95 (81.1%) survivors; 57 (74.0%) and 20 (26%) aneurysms exhibited complete and incomplete obliteration, respectively. Old age, high Hunt and Hess grades (IV-V), hemorrhagic complications, and increased aneurysm size were independent risk factors for unfavorable clinical outcomes (p<0.05). Increased aneurysm size and incomplete aneurysm occlusion on immediate angiography were independent risk factors for incomplete occlusion during follow-up (p<0.05). CONCLUSION Reconstructive EVTs are a feasible and effective treatment for BTAs but are associated with a high risk of ischemic and hemorrhagic complications and a high mortality rate. Larger aneurysms may predict unfavorable clinical outcomes and aneurysm recurrence during follow-up. Hemorrhagic complications may predict unfavorable clinical outcomes, whereas immediate complete aneurysm occlusion may predict total occlusion during follow-up.
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Affiliation(s)
- Weiying Zhong
- Department of Neurosurgery, Qilu Hospital of Shandong University and Institute of Brain and Brain-Inspired Science,Shandong University, Jinan, China
- Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese Ministry of Health and Chinese Academy of Medical Sciences, Qilu Hospital of Shandong University, Jinan, China
- State Key Laboratory of Generic Manufacture Technology of Traditional Chinese Medicine, Lunan Pharmaceutical Group Co. Ltd, Linyi, China
| | - Tongfu Zhang
- Department of Neurosurgery, Qilu Hospital of Shandong University and Institute of Brain and Brain-Inspired Science,Shandong University, Jinan, China
- Department of Neurosurgery, Yangxin County People's Hospital, Binzhou, China
| | - Chenran Su
- Department of Neurosurgery, Qilu Hospital of Shandong University and Institute of Brain and Brain-Inspired Science,Shandong University, Jinan, China
| | - Donglin Zhou
- Department of Neurosurgery, Qilu Hospital of Shandong University and Institute of Brain and Brain-Inspired Science,Shandong University, Jinan, China
| | - Jianfeng Zhuang
- Department of Neurosurgery, Qilu Hospital of Shandong University and Institute of Brain and Brain-Inspired Science,Shandong University, Jinan, China
| | - Maogui Li
- Department of Neurosurgery, Qilu Hospital of Shandong University and Institute of Brain and Brain-Inspired Science,Shandong University, Jinan, China
| | - Yangyang Xu
- Department of Neurosurgery, Qilu Hospital of Shandong University and Institute of Brain and Brain-Inspired Science,Shandong University, Jinan, China
| | - Ming Liu
- Department of Neurosurgery, Qilu Hospital of Shandong University and Institute of Brain and Brain-Inspired Science,Shandong University, Jinan, China
| | - Mingxiang Zhang
- Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese Ministry of Health and Chinese Academy of Medical Sciences, Qilu Hospital of Shandong University, Jinan, China
| | - Yunyan Wang
- Department of Neurosurgery, Qilu Hospital of Shandong University and Institute of Brain and Brain-Inspired Science,Shandong University, Jinan, China
| | - Donghai Wang
- Department of Neurosurgery, Qilu Hospital of Shandong University and Institute of Brain and Brain-Inspired Science,Shandong University, Jinan, China
| | - Wandong Su
- Department of Neurosurgery, Qilu Hospital of Shandong University and Institute of Brain and Brain-Inspired Science,Shandong University, Jinan, China
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He T, Chen K, Chen RD. A predictive model for the recurrence of intracranial aneurysms following coil embolization. Front Neurol 2023; 14:1248603. [PMID: 38033770 PMCID: PMC10682084 DOI: 10.3389/fneur.2023.1248603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Accepted: 10/16/2023] [Indexed: 12/02/2023] Open
Abstract
Objective This study aimed to identify risk factors for intracranial aneurysms (IAs) recurrence and establish a predictive model to aid evaluation. Methods A total of 302 patients with 312 IAs undergoing coil embolization between September 2017 and October 2022 were divided into two groups based on digital subtraction angiography follow-up. Clinical characteristics, operation-related factors, and morphologies were measured. Cox proportional hazard regression was used to identify the risk factors. Hazard ratios (HRs) were used to score points, and a predictive model was established. The test cohorts consisted of 51 IAs. Receiver operating characteristic curves were generated to determine the cutoff values and area under the curves (AUCs). A Delong test was performed to compare the AUCs. Results Diameter maximum (D max) (p < 0.001, HR = 1.221), Raymond-Roy occlusion classification (RROC) II or III (p = 0.004, HR = 2.852), and ruptured status (p < 0.001, HR = 7.782) were independent risk factors for the recurrence of IAs. A predictive model was established: D max + 2 * RROC (II or III; yes = 1, no = 0) + 6 * ruptured status (yes = 1; no = 0). The AUC of the predictive model (0.818) was significantly higher than those of D max (0.704), RROC (II or III) (0.645), and rupture status (0.683), respectively (Delong test, p < 0.05). The cutoff values of the predictive model and D max were 9.75 points and 6.65 mm, respectively. Conclusion The D max, RROC (II or III), and ruptured status could independently predict the recurrence of IAs after coil embolization. Our model could aid in practical evaluations.
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Affiliation(s)
- Tao He
- Department of Cardiology, Zhongnan Hospital of Wuhan University, Wuhan, China
- Institute of Myocardial Injury and Repair, Wuhan University, Wuhan, China
| | - Kun Chen
- Department of Neurosurgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Ru-Dong Chen
- Department of Neurosurgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
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Chen L, Leng X, Zheng C, Shan Y, Wang M, Bao X, Wu J, Zou R, Liu X, Xu S, Xiang J, Wan S. Computational fluid dynamics (CFD) analysis in a ruptured vertebral artery dissecting aneurysm implanted by Pipeline when recurrent after LVIS-assisted coiling treatment: Case report and review of the literatures. Interv Neuroradiol 2023; 29:442-449. [PMID: 35484808 PMCID: PMC10399494 DOI: 10.1177/15910199221097766] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 04/06/2022] [Accepted: 04/11/2022] [Indexed: 11/16/2022] Open
Abstract
BACKGROUNDS Hemodynamics plays an important role in the natural history of the process of rupture and recurrence of intracranial aneurysms. This study aimed to investigate the role of hemodynamics for recurrence in a vertebral artery dissecting aneurysm (VADA). METHODS A patient with a ruptured VADA firstly treated by low-profile visualized intraluminal support (LVIS)-assisted coiling, and was implanted with a Pipeline Embolization Device (PED) after aneurysm recurrence. Finite element analysis and computational fluid dynamics simulations were conducted in 6 serial imaging procedures, and the calculated hemodynamics was correlated with aneurysm recurrence. RESULTS Wall shear stress (WSS) was not effectively suppressed, resulting in aneurysm recurrence with initial entry tear to occur above the protuberance after 7 months of LVIS stent-assisted coiling. With the implantation of PED, WSS, inflow stream and velocity at the aneurysm neck significantly decreased. During the 3-month follow-up after PED deployment, there was significant shrinkage of the sac and the blood flow in the sac was reduced considerably. The 27-month follow-up after PED deployment indicated the aneurysm was stable. CONCLUSIONS The present case study suggests that insufficient suppression of high WSS and high inflow velocity at the neck of the parent artery, especially near the posterior inferior cerebellar artery, might be associated with aneurysm recurrence.
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Affiliation(s)
- Linhui Chen
- Brain Center, Affiliated Zhejiang Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | | | - Chaobo Zheng
- Brain Center, Affiliated Zhejiang Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yejie Shan
- ArteryFlow Technology Co., Ltd. Hangzhou, China
| | - Ming Wang
- Brain Center, Affiliated Zhejiang Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Xiang Bao
- Department of Neurosurgery, Jinhua Central Hospital, Jinhua, China
| | - Jiong Wu
- Brain Center, Affiliated Zhejiang Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Rong Zou
- ArteryFlow Technology Co., Ltd. Hangzhou, China
| | - Xiaobo Liu
- Department of Neurosurgery, Jinhua Central Hospital, Jinhua, China
| | - Shanhu Xu
- Brain Center, Affiliated Zhejiang Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | | | - Shu Wan
- Brain Center, Affiliated Zhejiang Hospital, Zhejiang University School of Medicine, Hangzhou, China
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Darsaut TE, Findlay JM, Bojanowski MW, Chalaala C, Iancu D, Roy D, Weill A, Boisseau W, Diouf A, Magro E, Kotowski M, Keough MB, Estrade L, Bricout N, Lejeune JP, Chow MMC, O'Kelly CJ, Rempel JL, Ashforth RA, Lesiuk H, Sinclair J, Erdenebold UE, Wong JH, Scholtes F, Martin D, Otto B, Bilocq A, Truffer E, Butcher K, Fox AJ, Arthur AS, Létourneau-Guillon L, Guilbert F, Chagnon M, Zehr J, Farzin B, Gevry G, Raymond J. A Pragmatic Randomized Trial Comparing Surgical Clipping and Endovascular Treatment of Unruptured Intracranial Aneurysms. AJNR Am J Neuroradiol 2023; 44:634-640. [PMID: 37169541 PMCID: PMC10249696 DOI: 10.3174/ajnr.a7865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 04/10/2023] [Indexed: 05/13/2023]
Abstract
BACKGROUND AND PURPOSE Surgical clipping and endovascular treatment are commonly used in patients with unruptured intracranial aneurysms. We compared the safety and efficacy of the 2 treatments in a randomized trial. MATERIALS AND METHODS Clipping or endovascular treatments were randomly allocated to patients with one or more 3- to 25-mm unruptured intracranial aneurysms judged treatable both ways by participating physicians. The study hypothesized that clipping would decrease the incidence of treatment failure from 13% to 4%, a composite primary outcome defined as failure of aneurysm occlusion, intracranial hemorrhage during follow-up, or residual aneurysms at 1 year, as adjudicated by a core lab. Safety outcomes included new neurologic deficits following treatment, hospitalization of >5 days, and overall morbidity and mortality (mRS > 2) at 1 year. There was no blinding. RESULTS Two hundred ninety-one patients were enrolled from 2010 to 2020 in 7 centers. The 1-year primary outcome, ascertainable in 290/291 (99%) patients, was reached in 13/142 (9%; 95% CI, 5%-15%) patients allocated to surgery and in 28/148 (19%; 95% CI, 13%-26%) patients allocated to endovascular treatments (relative risk: 2.07; 95% CI, 1.12-3.83; P = .021). Morbidity and mortality (mRS >2) at 1 year occurred in 3/143 and 3/148 (2%; 95% CI, 1%-6%) patients allocated to surgery and endovascular treatments, respectively. Neurologic deficits (32/143, 22%; 95% CI, 16%-30% versus 19/148, 12%; 95% CI, 8%-19%; relative risk: 1.74; 95% CI, 1.04-2.92; P = .04) and hospitalizations beyond 5 days (69/143, 48%; 95% CI, 40%-56% versus 12/148, 8%; 95% CI, 5%-14%; relative risk: 0.18; 95% CI, 0.11-0.31; P < .001) were more frequent after surgery. CONCLUSIONS Surgical clipping is more effective than endovascular treatment of unruptured intracranial aneurysms in terms of the frequency of the primary outcome of treatment failure. Results were mainly driven by angiographic results at 1 year.
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Affiliation(s)
- T E Darsaut
- From the Division of Neurosurgery (T.E.D., J.M.F., M.B.K., M.M.C.C., C.J.O.)
| | - J M Findlay
- From the Division of Neurosurgery (T.E.D., J.M.F., M.B.K., M.M.C.C., C.J.O.)
| | | | | | - D Iancu
- Department of Surgery, and Service of Neuroradiology (D.I., D.R., A.W., W.B., A.D., M.K., L.L.-G., F.G., J.R.), Department of Radiology, Centre Hospitalier de l'Université de Montréal, Montreal, Québec, Canada
| | - D Roy
- Department of Surgery, and Service of Neuroradiology (D.I., D.R., A.W., W.B., A.D., M.K., L.L.-G., F.G., J.R.), Department of Radiology, Centre Hospitalier de l'Université de Montréal, Montreal, Québec, Canada
| | - A Weill
- Department of Surgery, and Service of Neuroradiology (D.I., D.R., A.W., W.B., A.D., M.K., L.L.-G., F.G., J.R.), Department of Radiology, Centre Hospitalier de l'Université de Montréal, Montreal, Québec, Canada
| | - W Boisseau
- Department of Surgery, and Service of Neuroradiology (D.I., D.R., A.W., W.B., A.D., M.K., L.L.-G., F.G., J.R.), Department of Radiology, Centre Hospitalier de l'Université de Montréal, Montreal, Québec, Canada
| | - A Diouf
- Department of Surgery, and Service of Neuroradiology (D.I., D.R., A.W., W.B., A.D., M.K., L.L.-G., F.G., J.R.), Department of Radiology, Centre Hospitalier de l'Université de Montréal, Montreal, Québec, Canada
| | - E Magro
- Service of Neurosurgery (E.M.), Centre Hospitalier Universitaire Cavale Blanche, Institut National de la Santé et de la Recherche Médicale Unité Mixte de Recherche 1101 LaTIM, Brest, France
| | - M Kotowski
- Department of Surgery, and Service of Neuroradiology (D.I., D.R., A.W., W.B., A.D., M.K., L.L.-G., F.G., J.R.), Department of Radiology, Centre Hospitalier de l'Université de Montréal, Montreal, Québec, Canada
| | - M B Keough
- From the Division of Neurosurgery (T.E.D., J.M.F., M.B.K., M.M.C.C., C.J.O.)
| | - L Estrade
- Interventional Neuroradiology (L.E., N.B.)
| | - N Bricout
- Interventional Neuroradiology (L.E., N.B.)
| | - J-P Lejeune
- Service of Neurosurgery (J.-P.L.), Centre Hospitalier Universitaire de Lille, Lille, France
| | - M M C Chow
- From the Division of Neurosurgery (T.E.D., J.M.F., M.B.K., M.M.C.C., C.J.O.)
| | - C J O'Kelly
- From the Division of Neurosurgery (T.E.D., J.M.F., M.B.K., M.M.C.C., C.J.O.)
| | - J L Rempel
- Department of Surgery, and Department of Radiology and Diagnostic Imaging (J.L.R., R.A.A.), Mackenzie Health Sciences Centre, University of Alberta Hospital, Edmonton, Alberta, Canada
| | - R A Ashforth
- Department of Surgery, and Department of Radiology and Diagnostic Imaging (J.L.R., R.A.A.), Mackenzie Health Sciences Centre, University of Alberta Hospital, Edmonton, Alberta, Canada
| | - H Lesiuk
- Section of Neurosurgery (H.L., J.S.)
| | | | - U-E Erdenebold
- Department of Surgery, and Department of Medical Imaging (U.-E.E.), Section of Interventional Neuroradiology, Ottawa Hospital, University of Ottawa, Ottawa, Ontario, Canada
| | - J H Wong
- Division of Neurosurgery (J.H.W.), Foothills Medical Centre, University of Calgary, Calgary, Alberta, Canada
| | - F Scholtes
- Departments of Neurosurgery (F.S., D.M.)
| | - D Martin
- Departments of Neurosurgery (F.S., D.M.)
| | - B Otto
- Medical Physics (B.O.), Division of Medical Imaging, Centre Hospitalier Universitaire de Liège, Liège, Belgium
| | - A Bilocq
- Service of Neurosurgery (A.B., E.T.), Centre Hospitalier Régional de Trois-Rivières, Trois-Rivières, Québec, Canada
| | - E Truffer
- Service of Neurosurgery (A.B., E.T.), Centre Hospitalier Régional de Trois-Rivières, Trois-Rivières, Québec, Canada
| | - K Butcher
- Clinical Neurosciences (K.B.), Prince of Wales Clinical School, University of New South Wales, Randwick, New South Wales, Australia
| | - A J Fox
- Department of Medical Imaging (A.J.F.), University of Toronto, Toronto, Ontario, Canada
| | - A S Arthur
- Department of Neurosurgery (A.S.A.), University of Tennessee Health Science Center and Semmes-Murphey Clinic, Memphis, Tennessee
| | - L Létourneau-Guillon
- Department of Surgery, and Service of Neuroradiology (D.I., D.R., A.W., W.B., A.D., M.K., L.L.-G., F.G., J.R.), Department of Radiology, Centre Hospitalier de l'Université de Montréal, Montreal, Québec, Canada
| | - F Guilbert
- Department of Surgery, and Service of Neuroradiology (D.I., D.R., A.W., W.B., A.D., M.K., L.L.-G., F.G., J.R.), Department of Radiology, Centre Hospitalier de l'Université de Montréal, Montreal, Québec, Canada
| | - M Chagnon
- Department of Mathematics and Statistics (M.C., J.Z.), Université de Montréal, Montréal, Québec, Canada
| | - J Zehr
- Department of Mathematics and Statistics (M.C., J.Z.), Université de Montréal, Montréal, Québec, Canada
| | - B Farzin
- Research Centre of the University of Montreal Hospital Centre (B.F., G.G., J.R.), Interventional Neuroradiology Research Laboratory, Montreal, Québec, Canada
| | - G Gevry
- Research Centre of the University of Montreal Hospital Centre (B.F., G.G., J.R.), Interventional Neuroradiology Research Laboratory, Montreal, Québec, Canada
| | - J Raymond
- Department of Surgery, and Service of Neuroradiology (D.I., D.R., A.W., W.B., A.D., M.K., L.L.-G., F.G., J.R.), Department of Radiology, Centre Hospitalier de l'Université de Montréal, Montreal, Québec, Canada
- Research Centre of the University of Montreal Hospital Centre (B.F., G.G., J.R.), Interventional Neuroradiology Research Laboratory, Montreal, Québec, Canada
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8
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Dolas I, Unal TC, Gulsever CI, Sahin D, Huseynov H, Barburoglu M, Ozturk O, Can H, Adiyaman AE, Dagdeviren HE, Sabanci PA, Aydoseli A, Aras Y, Sencer A, Sencer S. Endovascular treatment of posterior circulation aneurysms: Results from a single-team experience of 81 cases including 13 flow diversion treatment. NEUROCIRUGIA (ENGLISH EDITION) 2023:S2529-8496(22)00097-1. [PMID: 36774258 DOI: 10.1016/j.neucie.2022.11.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 05/29/2022] [Indexed: 02/11/2023]
Abstract
INTRODUCTION Relatively constant surgical risks and rapid advances in endovascular treatment have caused a major shift toward endovascular management of posterior circulation aneurysms. This paper presents the results of a series of endovascularly treated posterior circulation aneurysms. METHODS A total of 81 patients who underwent endovascular treatment of posterior circulation aneurysms performed by a single team between 2009 and 2019 were included. Demographic, clinical, radiologic, and management details were retrospectively obtained from hospital records. RESULTS Among the included patients, 50 (61.7%) and 31 (38.3%) were female and male, respectively. Subarachnoid hemorrhage was observed in 30 patients (37%). Moreover, 40 (49.3%) aneurysms were treated with stent-assisted coiling, 1 (1.2%) aneurysm was treated with parent artery occlusion, 2 (2.4%) aneurysms were coiled using balloon assistance, 24 (29.6%) aneurysms were coiled primarily, 1 (1.2%) patient had an unsuccessful treatment attempt, and 13 (16.0%) aneurysms were treated with flow-diverter stents or stent monotherapy. During the last follow-up, 57 (83.8%) aneurysms were completely occluded, whereas 6 (8.8%) and 2 (2.9%) aneurysms did and did not have a residual neck, respectively. Flow diversion was used to treat 13 patients, among whom 8 had total occlusion or stable residue. A total of 7 deaths (8.6%) were encountered in this series. CONCLUSION Endovascular treatment should be considered as the primary treatment modality for posterior circulation aneurysms. Despite the high morbidity and mortality rates, promising results can be achieved with correct patient selection. Flow diversion can be a feasible alternative for complex aneurysms that are difficult to treat.
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Affiliation(s)
- Ilyas Dolas
- Department of Neurosurgery, Istanbul University, Istanbul Faculty of Medicine, Istanbul, Turkey
| | - Tugrul Cem Unal
- Department of Neurosurgery, Istanbul University, Istanbul Faculty of Medicine, Istanbul, Turkey
| | - Cafer Ikbal Gulsever
- Department of Neurosurgery, Istanbul University, Istanbul Faculty of Medicine, Istanbul, Turkey.
| | - Duran Sahin
- Department of Neurosurgery, Istanbul University, Istanbul Faculty of Medicine, Istanbul, Turkey
| | - Heydar Huseynov
- Department of Radiology, Istanbul Atlas University, Istanbul, Turkey
| | - Mehmet Barburoglu
- Department of Radiology, Istanbul University, Istanbul Faculty of Medicine, Istanbul, Turkey
| | - Onur Ozturk
- Department of Neurosurgery, Istanbul Bilim University, Istanbul, Turkey
| | - Halil Can
- Department of Neurosurgery, Istanbul Atlas University, Istanbul, Turkey
| | - Ali Ekrem Adiyaman
- Department of Neurosurgery, Istanbul University, Istanbul Faculty of Medicine, Istanbul, Turkey
| | - Huseyin Emre Dagdeviren
- Department of Neurosurgery, Istanbul University, Istanbul Faculty of Medicine, Istanbul, Turkey
| | - Pulat Akin Sabanci
- Department of Neurosurgery, Istanbul University, Istanbul Faculty of Medicine, Istanbul, Turkey
| | - Aydin Aydoseli
- Department of Neurosurgery, Istanbul University, Istanbul Faculty of Medicine, Istanbul, Turkey
| | - Yavuz Aras
- Department of Neurosurgery, Istanbul University, Istanbul Faculty of Medicine, Istanbul, Turkey
| | - Altay Sencer
- Department of Neurosurgery, Istanbul University, Istanbul Faculty of Medicine, Istanbul, Turkey
| | - Serra Sencer
- Department of Radiology, Istanbul University, Istanbul Faculty of Medicine, Istanbul, Turkey
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9
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Wu ZP, Yin JL, Liu SK, Ji S, Liu JY, Wang HL, Zhang YS, Zhang DZ. Enterprise stents versus low-profile visualized intraluminal support stents for stent-assisted coiling of unruptured paraclinoid aneurysms. Technol Health Care 2023; 31:1855-1865. [PMID: 37125582 DOI: 10.3233/thc-220697] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
BACKGROUND The microsurgical treatment of paraclinoid aneurysms can be challenging due to the anatomical structures that surround them. OBJECTIVE This study compared the clinical and angiographic outcomes of unruptured paraclinoid aneurysms treated with enterprise (EP) stents and low-profile visualized intraluminal support (LVIS) stents. METHODS A retrospective analysis of the clinical and radiological data from 133 patients with 139 unruptured paraclinoid aneurysms, who received an EP or an LVIS stent between January 2017 and June 2021 at Taizhou People's Hospital, was performed. Immediate postoperative and follow-up angiographic results were analyzed retrospectively using the Raymond-Roy occlusion classification (RROC). Any complications following the procedure and the patients' clinical outcomes were noted. RESULTS Enterprise stents were used for stent-assisted coiling in 64 patients with 68 aneurysms and LVIS stents were used in 69 patients with 71 aneurysms. Both groups exhibited an increase in the proportion of aneurysms meeting the criteria for RROC class I, but the LVIS group demonstrated a higher rate of aneurysms meeting the class I criteria compared with the EP group, both on immediate postoperative angiography (45.1% vs. 11.8%, p< 0.001) and on follow-up angiography (94.9% vs. 80.6%, p= 0.025). Procedure-related complications were experienced by 9.4% of patients in the EP group (one coil prolapse, two parent artery occlusions, and three thromboembolic events), and 8.7% of patients in the LVIS group (three stent-related thrombosis and three thromboembolic events). There were no statistically significant differences between the two groups in relation to perioperative complications (p= 0.746) or favorable clinical outcomes (p= 0.492). CONCLUSION A greater proportion of aneurysms in the LVIS group met the criteria for RROC class I compared with the EP group. There is no significant difference in procedural complications or clinical outcomes between EP and LVIS stents. Although no aneurysm recurrence was observed during the short follow-up period, continued monitoring is required.
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10
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Xenofontos A, Raffalli-Ebezant H, Madhavan A, Khan H, Mastan A, Russell I, Dulhanty L, Patel HC, Hilditch CA. Simple endovascular coiling: An effective long-term solution for wide-necked ruptured middle cerebral artery aneurysms? A 10-years retrospective study. Neuroradiol J 2022; 35:573-579. [PMID: 35037769 PMCID: PMC9513924 DOI: 10.1177/19714009211067406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND Endovascular coiling is usually the first line treatment modality for most ruptured intracranial aneurysms. However, there is still some debate as to whether microsurgical clipping or coiling is the treatment of choice for complex wide-necked ruptured middle cerebral artery (MCA) aneurysms. Our aim was to assess the efficacy, safety and longevity of simple endovascular coiling for ruptured MCA aneurysms. METHODS This was a single-centre 10 years retrospective study (2008-2019) of all endovascularly treated patients with ruptured MCA aneurysms (n = 148). Patients were treated with simple coiling (n = 111), balloon-assisted coiling (n = 13), dual micro-catheter coiling (n = 19), balloon-assisted and dual micro-catheter coiling (n = 4) and woven endobridge (WEB) device (n = 1). The standard follow-up protocol consisted of Magnetic Resonance angiography at 6, 12 and 24 months. Our primary endpoints were mortality at 2, 12 and 24 months and dependency at discharge. Secondary endpoints included aneurysm occlusion, complications, re-canalisation, rebleeding and retreatment rates. RESULTS All-cause mortality at 2, 12 and 24 months was 4.7% (n = 7), 8.1% (n = 12) and 10.8% (n = 16), respectively. 81.3% of patients remained independent in activities of daily livings (ADLs) at the point of discharge. Over a mean follow-up period of 19.7 months, we demonstrated re-bleeding and re-treatment rates of 2.7% (n = 4) and 4.1% (n = 6) respectively. Complete occlusion was achieved in 54% (n = 79) of aneurysms, with recanalisation observed in 18.2% (n = 27) of the patients. CONCLUSIONS Our results demonstrate that simple endovascular coiling techniques offer a safe and effective solution in the management of ruptured MCA aneurysms without the requirement for re-treatment either surgically or endovascularly using endoluminal stents or other devices.
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Affiliation(s)
- Andreas Xenofontos
- Department of Neuroradiology, Salford Royal NHS Foundation
Trust, Salford, UK
| | | | - Aparna Madhavan
- Department of Neuroradiology, Salford Royal NHS Foundation
Trust, Salford, UK
| | - Haroon Khan
- Department of Neuroradiology, Salford Royal NHS Foundation
Trust, Salford, UK
| | - Aliya Mastan
- Department of Neuroradiology, Salford Royal NHS Foundation
Trust, Salford, UK
| | - Ian Russell
- Department of Neuroradiology, Salford Royal NHS Foundation
Trust, Salford, UK
| | - Louise Dulhanty
- Department of Neurosurgery, Salford Royal NHS Foundation
Trust, Salford, UK
| | - Hiren C Patel
- Department of Neurosurgery, Salford Royal NHS Foundation
Trust, Salford, UK
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11
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Dong L, Wang J, Chen X, Zhang L, Zhao Z, Peng Q, Jin Z, Wu J, Lv M, Liu P. Stent-assisted coiling using the Neuroform Atlas stent for treatment of aneurysms that recur after coil embolization. Front Neurol 2022; 13:967942. [PMID: 36237610 PMCID: PMC9552843 DOI: 10.3389/fneur.2022.967942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Accepted: 08/29/2022] [Indexed: 11/13/2022] Open
Abstract
ObjectiveTo evaluate the safety and efficacy of stent-assisted coiling (SAC) using the Neuroform Atlas stent for aneurysms that recur after coil embolization.MethodsWe retrospectively reviewed patients who underwent SAC using the Neuroform Atlas stent to treat aneurysms that recurred after coil embolization from November 2020 to November 2021. Patient and aneurysm characteristics, procedural details, complications, and angiographic and clinical follow-up outcomes were recorded and analyzed.ResultsEleven patients with 11 recurrent aneurysms were included for analysis. Atlas stent deployment was successful in all cases. Angiography immediately after the SAC procedure and at last follow-up showed complete occlusion in 10 patients (90.9%) and a residual neck in one (9.1%). Mean angiographic and clinical follow-ups were 9.2 and 10 months, respectively. A single procedure-related complication occurred, mildly blurred vision in the left eye, which recovered completely. No permanent morbidity or mortality occurred.ConclusionSAC using the Atlas stent to treat aneurysms that recur after coil embolization is safe and effective. Large-scale studies with long-term follow-up are warranted to confirm our results.
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Affiliation(s)
- Linggen Dong
- Department of Neurointervention, Beijing Neurosurgical Institute, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Jiejun Wang
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Xiheng Chen
- Department of Neurointervention, Beijing Neurosurgical Institute, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Longhui Zhang
- Department of Neurointervention, Beijing Neurosurgical Institute, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Zhiqiang Zhao
- Department of Neurointervention, Beijing Neurosurgical Institute, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Qichen Peng
- Department of Neurointervention, Beijing Neurosurgical Institute, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Zeping Jin
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Jun Wu
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- *Correspondence: Jun Wu
| | - Ming Lv
- Department of Neurointervention, Beijing Neurosurgical Institute, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- Ming Lv
| | - Peng Liu
- Department of Neurointervention, Beijing Neurosurgical Institute, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- Peng Liu
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12
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Jin J, Guo G, Ren Y, Yang B, Wu Y, Wang S, Sun Y, Wang X, Wang Y, Zheng J. Risk Factors for Recurrence of Intracranial Aneurysm After Coil Embolization: A Meta-Analysis. Front Neurol 2022; 13:869880. [PMID: 35937054 PMCID: PMC9355382 DOI: 10.3389/fneur.2022.869880] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Accepted: 05/23/2022] [Indexed: 11/13/2022] Open
Abstract
Intracranial aneurysm is a severe cerebral disorder involving complicated risk factors and endovascular coiling is a common therapeutic selection for intracranial aneurysm. The recurrence is a clinical challenge in intracranial aneurysms after coil embolization. With this study, we provided a meta-analysis of the risk factors for the recurrence of intracranial aneurysm after coil embolization. Nine studies were included with a total of 1,270 studies that were retrieved from the database. The sample size of patients with intracranial aneurysms ranged from 241 to 3,530, and a total of 9,532 patients were included in the present meta-analysis. The intracranial aneurysms that occurred in middle cerebral artery (MCA) (OR = 1.09, 95% CI: 1.03–1.16, P = 0.0045) and posterior circulation (OR = 2.01, 95% CI: 1.55–2.60, P = 0.000) presented the significantly higher risk of recurrence after coil embolization. Meanwhile, intracranial aneurysms of size > 7 mm (OR = 5.38, 95%CI: 3.76–7.70, P = 0.000) had a significantly higher risk of recurrence after coil embolization. Moreover, ruptured aneurysm (OR = 2.86, 95% CI: 2.02–4.04, P = 0.000) and subarachnoid hemorrhage (SAH) (OR = 1.57, 95% CI: 1.20–2.06, P = 0.001) was positively correlated with the risk of recurrence after coil embolization. In conclusion, this meta-analysis identified the characteristics of intracranial aneurysms with MCA, posterior circulation, size > 7 mm, ruptured aneurysm, and SAH as the risk factors of recurrence after coil embolization for intracranial aneurysms.
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Affiliation(s)
- Ji Jin
- School of Public Health, Shanxi Medical University, Taiyuan, China
| | - Geng Guo
- Department of Neurosurgery, The First Hospital, Shanxi Medical University, Taiyuan, China
- *Correspondence: Geng Guo
| | - Yeqing Ren
- Department of Neurosurgery, The First Hospital, Shanxi Medical University, Taiyuan, China
| | - Biao Yang
- Department of Neurosurgery, The First Hospital, Shanxi Medical University, Taiyuan, China
| | - Yongqiang Wu
- Department of Neurosurgery, The First Hospital, Shanxi Medical University, Taiyuan, China
| | - Shule Wang
- Department of Neurosurgery, The First Hospital, Shanxi Medical University, Taiyuan, China
| | - Yanqi Sun
- Department of Neurosurgery, The First Hospital, Shanxi Medical University, Taiyuan, China
| | - Xiaogang Wang
- Department of Neurosurgery, The First Hospital, Shanxi Medical University, Taiyuan, China
| | - Yuxiao Wang
- School of Public Health, Shanxi Medical University, Taiyuan, China
| | - Jianzhong Zheng
- School of Public Health, Shanxi Medical University, Taiyuan, China
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13
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Jiang Y, Lu G, Ge L, Zou R, Li G, Wan H, Leng X, Xiang J, Zhang X. Hemodynamic Comparison of Treatment Strategies for Intracranial Vertebral Artery Fusiform Aneurysms. Front Neurol 2022; 13:927135. [PMID: 35873788 PMCID: PMC9296783 DOI: 10.3389/fneur.2022.927135] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Accepted: 06/06/2022] [Indexed: 11/23/2022] Open
Abstract
Objective This study comparatively analyzed the hemodynamic changes resulting from various simulated stent-assisted embolization treatments to explore an optimal treatment strategy for intracranial vertebral artery fusiform aneurysms. An actual vertebral fusiform aneurysm case treated by large coil post-stenting (PLCS) was used as a control. Materials and Methods A single case of an intracranial vertebral artery fusiform aneurysm underwent a preoperative and eight postoperative finite element treatment simulations: PLCS [single and dual Low-profile Visualized Intraluminal Support (LVIS)], Jailing technique (single and dual LVIS both simulated twice, Pipeline Embolization Device (PED) with or without large coils (LCs). Qualitative and quantitative assessments were performed to analyze the most common hemodynamic risk factors for recurrence. Results Jailing technique and PED-only had a high residual flow volume (RFV) and wall shear stress (WSS) on the large curvature of the blood flow impingement region. Quantitative analysis determined that PLSC and PED had a lower RFV compared to preoperative than did the jailing technique [PED+LC 2.46% < PLCS 1.2 (dual LVIS) 4.75% < PLCS 1.1 (single LVIS) 6.34% < PED 6.58% < Jailing 2.2 12.45% < Jailing 1.2 12.71% < Jailing 1.1 14.28% < Jailing 2.1 16.44%]. The sac-averaged flow velocity treated by PLCS, PED and PED+LC compared to preoperatively was significantly lower than the jailing technique [PED+LC = PLCS 1.2 (dual LVIS) 17.5% < PLCS 1.1 (single LVIS) = PED 27.5% < Jailing 1.2 = Jailing 2.2 32.5% < Jailing 1.1 37.5% < Jailing 2.1 40%]. The sac-averaged WSS for the PLCS 1.2 (dual LVIS) model was lower than the PED+LC, while the high WSS area of the Jailing 1 model was larger than for Jailing 2 [PLCS 1.2 38.94% (dual LVIS) < PED+LC 41% < PLCS 1.1 43.36% (single LVIS) < PED 45.23% < Jailing 2.1 47.49% < Jailing 2.2 47.79% < Jailing 1.1 48.97% < Jailing 1.2 49.85%]. Conclusions For fusiform aneurysms, post large coil stenting can provide a uniform coil configuration potentially reducing the hemodynamic risk factors of recurrence. Flow diverters also may reduce the recurrence risk, with long-term follow-up required, especially to monitor branch blood flow to prevent postoperative ischemia.
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Affiliation(s)
- Yeqing Jiang
- Huashan Hospital, Fudan University, Shanghai, China
| | - Gang Lu
- Huashan Hospital, Fudan University, Shanghai, China
| | - Liang Ge
- Huashan Hospital, Fudan University, Shanghai, China
| | - Rong Zou
- ArteryFlow Technology Co., Ltd, Hangzhou, China
| | - Gaohui Li
- ArteryFlow Technology Co., Ltd, Hangzhou, China
| | - Hailin Wan
- Huashan Hospital, Fudan University, Shanghai, China
| | | | - Jianping Xiang
- ArteryFlow Technology Co., Ltd, Hangzhou, China
- *Correspondence: Jianping Xiang
| | - Xiaolong Zhang
- Huashan Hospital, Fudan University, Shanghai, China
- Xiaolong Zhang
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14
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Dolas I, Unal TC, Gulsever CI, Sahin D, Huseynov H, Barburoglu M, Ozturk O, Can H, Adiyaman AE, Dagdeviren HE, Sabanci PA, Aydoseli A, Aras Y, Sencer A, Sencer S. Endovascular treatment of posterior circulation aneurysms: Results from a single-team experience of 81 cases including 13 flow diversion treatment. Neurocirugia (Astur) 2022. [DOI: 10.1016/j.neucir.2022.05.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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15
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Schroeder G, Edalati M, Tom G, Kuntjoro N, Gutin M, Gurian M, Cuniberto E, Hirth E, Martiri A, Sposato MT, Aminzadeh S, Eichenbaum J, Alizadeh P, Baidya A, Haghniaz R, Nasiri R, Kaneko N, Mansouri A, Khademhosseini A, Sheikhi A. Assessing the aneurysm occlusion efficacy of a shear-thinning biomaterial in a 3D-printed model. J Mech Behav Biomed Mater 2022; 130:105156. [PMID: 35397405 PMCID: PMC9060636 DOI: 10.1016/j.jmbbm.2022.105156] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2021] [Revised: 02/13/2022] [Accepted: 02/27/2022] [Indexed: 12/26/2022]
Abstract
Metallic coil embolization is a common method for the endovascular treatment of visceral artery aneurysms (VAA) and visceral artery pseudoaneurysms (VAPA); however, this treatment is suboptimal due to the high cost of coils, incomplete volume occlusion, poor reendothelialization, aneurysm puncture, and coil migration. Several alternative treatment strategies are available, including stent flow diverters, glue embolics, gelfoam slurries, and vascular mesh plugs-each of which have their own disadvantages. Here, we investigated the in vitro capability of a shear-thinning biomaterial (STB), a nanocomposite hydrogel composed of gelatin and silicate nanoplatelets, for the minimally-invasive occlusion of simple necked aneurysm models. We demonstrated the injectability of STB through various clinical catheters, engineered an in vitro testing apparatus to independently manipulate aneurysm neck diameter, fluid flow rate, and flow waveform, and tested the stability of STB within the models under various conditions. Our experiments show that STB is able to withstand at least 1.89 Pa of wall shear stress, as estimated by computational fluid dynamics. STB is also able to withstand up to 10 mL s-1 pulsatile flow with a waveform mimicking blood flow in the human femoral artery and tolerate greater pressure changes than those in the human aorta. We ultimately found that our in vitro system was limited by supraphysiologic pressure changes caused by aneurysm models with low compliance.
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Affiliation(s)
- Grant Schroeder
- Department of Bioengineering, University of California, Los Angeles, 410 Westwood Plaza, Los Angeles, CA, 90095, USA; California NanoSystems Institute (CNSI), University of California, Los Angeles, 570 Westwood Plaza, Los Angeles, CA, 90095, USA; David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Masoud Edalati
- Department of Bioengineering, University of California, Los Angeles, 410 Westwood Plaza, Los Angeles, CA, 90095, USA; California NanoSystems Institute (CNSI), University of California, Los Angeles, 570 Westwood Plaza, Los Angeles, CA, 90095, USA; Department of Mechanical Engineering Rowan University, Rowan Hall 201 Mullica Hill Rd. Glassboro, NJ, 08028, USA
| | - Gregory Tom
- Department of Bioengineering, University of California, Los Angeles, 410 Westwood Plaza, Los Angeles, CA, 90095, USA; California NanoSystems Institute (CNSI), University of California, Los Angeles, 570 Westwood Plaza, Los Angeles, CA, 90095, USA
| | - Nicole Kuntjoro
- Department of Bioengineering, University of California, Los Angeles, 410 Westwood Plaza, Los Angeles, CA, 90095, USA; California NanoSystems Institute (CNSI), University of California, Los Angeles, 570 Westwood Plaza, Los Angeles, CA, 90095, USA
| | - Mark Gutin
- Department of Bioengineering, University of California, Los Angeles, 410 Westwood Plaza, Los Angeles, CA, 90095, USA; California NanoSystems Institute (CNSI), University of California, Los Angeles, 570 Westwood Plaza, Los Angeles, CA, 90095, USA; Biomaterials Innovation Research Center, Division of Biomedical Engineering, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA; Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Melvin Gurian
- Biomaterials Innovation Research Center, Division of Biomedical Engineering, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA; Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Edoardo Cuniberto
- Biomaterials Innovation Research Center, Division of Biomedical Engineering, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA; Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Elisabeth Hirth
- Biomaterials Innovation Research Center, Division of Biomedical Engineering, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA; Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Alessia Martiri
- Biomaterials Innovation Research Center, Division of Biomedical Engineering, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA; Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Maria Teresa Sposato
- Biomaterials Innovation Research Center, Division of Biomedical Engineering, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA; Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Selda Aminzadeh
- Department of Bioengineering, University of California, Los Angeles, 410 Westwood Plaza, Los Angeles, CA, 90095, USA; California NanoSystems Institute (CNSI), University of California, Los Angeles, 570 Westwood Plaza, Los Angeles, CA, 90095, USA
| | - James Eichenbaum
- Department of Bioengineering, University of California, Los Angeles, 410 Westwood Plaza, Los Angeles, CA, 90095, USA; California NanoSystems Institute (CNSI), University of California, Los Angeles, 570 Westwood Plaza, Los Angeles, CA, 90095, USA
| | - Parvin Alizadeh
- Department of Bioengineering, University of California, Los Angeles, 410 Westwood Plaza, Los Angeles, CA, 90095, USA; California NanoSystems Institute (CNSI), University of California, Los Angeles, 570 Westwood Plaza, Los Angeles, CA, 90095, USA; Department of Materials Science & Engineering, Faculty of Engineering & Technology, Tarbiat Modares University, Tehran, Iran
| | - Avijit Baidya
- Department of Bioengineering, University of California, Los Angeles, 410 Westwood Plaza, Los Angeles, CA, 90095, USA; California NanoSystems Institute (CNSI), University of California, Los Angeles, 570 Westwood Plaza, Los Angeles, CA, 90095, USA
| | - Reihaneh Haghniaz
- Department of Bioengineering, University of California, Los Angeles, 410 Westwood Plaza, Los Angeles, CA, 90095, USA; California NanoSystems Institute (CNSI), University of California, Los Angeles, 570 Westwood Plaza, Los Angeles, CA, 90095, USA; Terasaki Institute for Biomedical Innovation (TIBI), Los Angeles, CA, 90024, USA
| | - Rohollah Nasiri
- Department of Bioengineering, University of California, Los Angeles, 410 Westwood Plaza, Los Angeles, CA, 90095, USA; California NanoSystems Institute (CNSI), University of California, Los Angeles, 570 Westwood Plaza, Los Angeles, CA, 90095, USA
| | - Naoki Kaneko
- Department of Radiological Sciences, David Geffen School of Medicine, University of California, Los Angeles, 10833 Le Conte Ave, Los Angeles, CA, 90095, USA
| | - Abraham Mansouri
- Department of Mechanical Engineering, Higher College of Technology, Dubai, 15825, United Arab Emirates
| | - Ali Khademhosseini
- Department of Bioengineering, University of California, Los Angeles, 410 Westwood Plaza, Los Angeles, CA, 90095, USA; California NanoSystems Institute (CNSI), University of California, Los Angeles, 570 Westwood Plaza, Los Angeles, CA, 90095, USA; Terasaki Institute for Biomedical Innovation (TIBI), Los Angeles, CA, 90024, USA.
| | - Amir Sheikhi
- Department of Bioengineering, University of California, Los Angeles, 410 Westwood Plaza, Los Angeles, CA, 90095, USA; California NanoSystems Institute (CNSI), University of California, Los Angeles, 570 Westwood Plaza, Los Angeles, CA, 90095, USA; Department of Chemical Engineering, The Pennsylvania State University, University Park, PA, 16802, USA; Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA, 16802, USA.
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16
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Paganelli SL, Alejandro SA, Campos Filho JM, Dória-Netto HL, Chaddad-Neto F. Tips and tricks in microsurgical treatment for previously embolized aneurysms - 3D video. World Neurosurg 2022; 163:39. [PMID: 35427791 DOI: 10.1016/j.wneu.2022.04.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 04/03/2022] [Accepted: 04/04/2022] [Indexed: 10/18/2022]
Affiliation(s)
| | | | - José Maria Campos Filho
- Department of Neurology and Neurosurgery, Universidade Federal de São Paulo, São Paulo - SP, Brazil; Hospital Beneficência Portuguesa de São Paulo, São Paulo - SP, Brazil
| | - Hugo Leonardo Dória-Netto
- Department of Neurology and Neurosurgery, Universidade Federal de São Paulo, São Paulo - SP, Brazil; Hospital Beneficência Portuguesa de São Paulo, São Paulo - SP, Brazil
| | - Feres Chaddad-Neto
- Department of Neurology and Neurosurgery, Universidade Federal de São Paulo, São Paulo - SP, Brazil; Hospital Beneficência Portuguesa de São Paulo, São Paulo - SP, Brazil.
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17
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Fuga M, Tanaka T, Irie K, Kajiwara I, Tachi R, Teshigawara A, Ishibashi T, Hasegawa Y, Murayama Y. Risk factors for recanalization of dense coil packing for unruptured cerebral aneurysms in endovascular coil embolization: Analysis of a single center's experience. J Clin Neurosci 2022; 98:175-181. [PMID: 35183894 DOI: 10.1016/j.jocn.2022.02.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Revised: 02/07/2022] [Accepted: 02/09/2022] [Indexed: 11/15/2022]
Abstract
In coil embolization of cerebral aneurysms, inadequate packing is known to increase the probability of recanalization. Even tightly embolized aneurysms may be recanalized, but predictive factors for recanalization have not been fully investigated. This retrospective study aimed to identify risk factors for recanalization of treated aneurysms with a volume embolization ratio (VER) ≥ 25%. A total of 301 unruptured aneurysms in 248 patients who underwent coil embolization between March 2012 and January 2021 were analyzed. Cases involving dissecting aneurysm, intraluminal thrombosis, parent artery occlusion, intraoperative rupture, re-treatment, rupture the day after surgery, postoperative coil migration, and postoperative parent artery occlusion were excluded due to the inaccuracy of VER. A total of 105 aneurysms (34.9%) treated with VER ≥ 25% were extracted. Clinical features (age, sex, medical history, family history), anatomical features (shape, location, aneurysm size, inflow angle, and volume), procedural features (stent-assisted, Raymond-Roy occlusion classification [RROC] immediately after treatment, re-treatment rate), and follow-up period were compared between Recanalization and Non-recanalization groups. Predictors of recanalization were determined using logistic regression and receiver operating characteristic (ROC) curve analyses. Eleven aneurysms were recanalized. In multivariate analysis, RROC class 3 (odds ratio [OR] 11.0; 95% confidence interval [CI] 2.03-59.4) and aneurysm volume (OR 1.005; 95%CI 1.001-1.008) were independent predictors of recanalization. ROC curve analysis showed optimal cutoff values for aneurysm volume of 69.5 mm3 (sensitivity, 81.8%; specificity, 72.3%). In coil embolization of unruptured aneurysms that VER ≥ 25%, cases with RROC class 3 or high aneurysm volume may be associated with a higher risk of recanalization, and should be carefully followed-up.
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Affiliation(s)
- Michiyasu Fuga
- Department of Neurosurgery, Jikei University School of Medicine, Kashiwa Hospital, Chiba, Japan.
| | - Toshihide Tanaka
- Department of Neurosurgery, Jikei University School of Medicine, Kashiwa Hospital, Chiba, Japan
| | - Koreaki Irie
- Department of Neurosurgery, Japan Red Cross Medical Center, Tokyo, Japan
| | - Ikki Kajiwara
- Department of Neurosurgery, National Center for Global Health and Medicine Kounodai Hospital, Chiba, Japan
| | - Rintaro Tachi
- Department of Neurosurgery, Jikei University School of Medicine, Kashiwa Hospital, Chiba, Japan
| | - Akihiko Teshigawara
- Department of Neurosurgery, Jikei University School of Medicine, Kashiwa Hospital, Chiba, Japan
| | - Toshihiro Ishibashi
- Department of Neurosurgery, Jikei University School of Medicine, Tokyo, Japan
| | - Yuzuru Hasegawa
- Department of Neurosurgery, Jikei University School of Medicine, Kashiwa Hospital, Chiba, Japan
| | - Yuichi Murayama
- Department of Neurosurgery, Jikei University School of Medicine, Tokyo, Japan
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18
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Fuentes AM, Stone McGuire L, Amin-Hanjani S. Sex Differences in Cerebral Aneurysms and Subarachnoid Hemorrhage. Stroke 2022; 53:624-633. [PMID: 34983239 DOI: 10.1161/strokeaha.121.037147] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Sex differences in cerebral aneurysm occurrence and characteristics have been well described. Although sex differences in outcomes following ischemic stroke have been identified, the effect of sex on outcomes following hemorrhagic stroke, and in particular, aneurysm treatment has been less studied. We describe the current state of knowledge regarding the impact of sex on treatment and outcomes of cerebral aneurysms. Although prior studies suggest that aneurysm prevalence and progression may be related to sex, we did not find clear evidence that outcomes following subarachnoid hemorrhage vary based on sex. Last, we identify areas for future research that could enhance understanding of the role sex plays in this context.
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19
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Ou C, Liu J, Qian Y, Chong W, Liu D, He X, Zhang X, Duan CZ. Automated Machine Learning Model Development for Intracranial Aneurysm Treatment Outcome Prediction: A Feasibility Study. Front Neurol 2021; 12:735142. [PMID: 34912282 PMCID: PMC8666475 DOI: 10.3389/fneur.2021.735142] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Accepted: 11/01/2021] [Indexed: 11/30/2022] Open
Abstract
Background: The prediction of aneurysm treatment outcomes can help to optimize the treatment strategies. Machine learning (ML) has shown positive results in many clinical areas. However, the development of such models requires expertise in ML, which is not an easy task for surgeons. Objectives: The recently emerged automated machine learning (AutoML) has shown promise in making ML more accessible to non-computer experts. We aimed to evaluate the feasibility of applying AutoML to develop the ML models for treatment outcome prediction. Methods: The patients with aneurysms treated by endovascular treatment were prospectively recruited from 2016 to 2020. Treatment was considered successful if angiographic complete occlusion was achieved at follow-up. A statistical prediction model was developed using multivariate logistic regression. In addition, two ML models were developed. One was developed manually and the other was developed by AutoML. Three models were compared based on their area under the precision-recall curve (AUPRC) and area under the receiver operating characteristic curve (AUROC). Results: The aneurysm size, stent-assisted coiling (SAC), and posterior circulation were the three significant and independent variables associated with treatment outcome. The statistical model showed an AUPRC of 0.432 and AUROC of 0.745. The conventional manually trained ML model showed an improved AUPRC of 0.545 and AUROC of 0.781. The AutoML derived ML model showed the best performance with AUPRC of 0.632 and AUROC of 0.832, significantly better than the other two models. Conclusions: This study demonstrated the feasibility of using AutoML to develop a high-quality ML model, which may outperform the statistical model and manually derived ML models. AutoML could be a useful tool that makes ML more accessible to the clinical researchers.
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Affiliation(s)
- Chubin Ou
- Neurosurgery Center, Department of Cerebrovascular Surgery, The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China on Diagnosis and Treatment of Cerebrovascular Disease, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, The Neurosurgery Institute of Guangdong Province, Zhujiang Hospital, Southern Medical University, Guangzhou, China.,Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, Macquarie University, Sydney, NSW, Australia
| | - Jiahui Liu
- Neurosurgery Center, Department of Cerebrovascular Surgery, The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China on Diagnosis and Treatment of Cerebrovascular Disease, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, The Neurosurgery Institute of Guangdong Province, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Yi Qian
- Neurosurgery Center, Department of Cerebrovascular Surgery, The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China on Diagnosis and Treatment of Cerebrovascular Disease, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, The Neurosurgery Institute of Guangdong Province, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Winston Chong
- Monash Medical Centre, Monash University, Clayton, VIC, Australia
| | - Dangqi Liu
- Department of Neurosurgery, The First People's Hospital of Foshan, Foshan, China
| | - Xuying He
- Neurosurgery Center, Department of Cerebrovascular Surgery, The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China on Diagnosis and Treatment of Cerebrovascular Disease, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, The Neurosurgery Institute of Guangdong Province, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Xin Zhang
- Neurosurgery Center, Department of Cerebrovascular Surgery, The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China on Diagnosis and Treatment of Cerebrovascular Disease, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, The Neurosurgery Institute of Guangdong Province, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Chuan-Zhi Duan
- Neurosurgery Center, Department of Cerebrovascular Surgery, The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China on Diagnosis and Treatment of Cerebrovascular Disease, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, The Neurosurgery Institute of Guangdong Province, Zhujiang Hospital, Southern Medical University, Guangzhou, China
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20
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Yuan J, Huang C, Li Z, Jiang X, Zhao X, Lai N, Xia D, Wu D, Zhang B, Wang X, Fang X. Hemodynamic Characteristics Associated with Recurrence of Middle Cerebral Artery Bifurcation Aneurysms After Total Embolization. Clin Interv Aging 2021; 16:2023-2032. [PMID: 34908831 PMCID: PMC8665268 DOI: 10.2147/cia.s326635] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Accepted: 09/08/2021] [Indexed: 11/23/2022] Open
Abstract
Objective Hemodynamic parameters are associated with the recurrence of intracranial aneurysms (IAs). Studies showed that high velocity and wall shear stress (WSS) were associated with IAs recurrence after endovascular treatment; nevertheless, factors such as small sample size, locations of IAs, and types of IAs (ie, sidewall or bifurcation) were neglected. The purpose of this study was to identify the hemodynamic characteristics associated with recurrence of middle cerebral artery bifurcation aneurysms (MCABAs) after total embolization by the method of computer fluid dynamics (CFD). Methods Following inclusion criteria, we included 92 MCABAs treated with coils only after total embolization from January 2014 to January 2019. We segmented into recurrent and non-recurrent groups according to follow-up digital subtraction angiography (DSA). The MCABA models, including pre-operatively and immediate post-operatively, were reconstructed using 3D-DSAs. The hemodynamic parameters pre-operatively and immediately post-operatively between the groups were calculated and analyzed. Results There were no significant differences between the recurrent and non-recurrent groups for spatially averaged wall shear stress (SAWSS), maximum wall shear stress (MWSS), velocity, or oscillatory shear index (OSI) at the neck pre-operatively. In the recurrent group, the WSS (22.02±5.11 vs 37.43±8.27 pa, p < 0.001), MWSS (42.59±17.02 vs 66.98±18.61 pa, p=0.014), velocity (0.86±0.19 vs 1.44±0.61 m/s, p=0.01) preoperatively were significantly higher than postoperative values. By contrast, in the non-recurrent group, the WSS (26.53±8.18 vs 22.29±8.64pa, p=0.002), MWSS (42.71±14.01 vs 37.15±15.56 pa, p=0.013), velocity (1.08±0.43 vs 0.23 (0.52, 0.57) m/s, p < 0.001) postoperatively were significantly lower than preoperative values. The OSI, whether in the recurrent group or the non-recurrent group, did not differ significantly between groups (p=0.79 and p=0.19). Conclusion Higher WSS (SAWSS, MWSS) and flow velocity at the aneurysm neck after embolization might be related to recurrence of bifurcation IAs. These might be applied to clinical post-embolization management for the evaluation of bifurcation IAs recanalization.
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Affiliation(s)
- Jinlong Yuan
- Department of Neurosurgery, The First Affiliated Hospital of Wannan Medical College (Yijishan Hospital of Wannan Medical College), Wuhu, People's Republic of China
| | - Chenlei Huang
- Department of Clinical Laboratory, The First Affiliated Hospital of Wannan Medical College (Yijishan Hospital of Wannan Medical College), Wuhu, People's Republic of China
| | - Zhenbao Li
- Department of Neurosurgery, The First Affiliated Hospital of Wannan Medical College (Yijishan Hospital of Wannan Medical College), Wuhu, People's Republic of China
| | - Xiaochun Jiang
- Department of Neurosurgery, The First Affiliated Hospital of Wannan Medical College (Yijishan Hospital of Wannan Medical College), Wuhu, People's Republic of China
| | - Xintong Zhao
- Department of Neurosurgery, The First Affiliated Hospital of Wannan Medical College (Yijishan Hospital of Wannan Medical College), Wuhu, People's Republic of China
| | - Niansheng Lai
- Department of Neurosurgery, The First Affiliated Hospital of Wannan Medical College (Yijishan Hospital of Wannan Medical College), Wuhu, People's Republic of China
| | - Dayong Xia
- Department of Neurosurgery, The First Affiliated Hospital of Wannan Medical College (Yijishan Hospital of Wannan Medical College), Wuhu, People's Republic of China
| | - Degang Wu
- Department of Neurosurgery, The First Affiliated Hospital of Wannan Medical College (Yijishan Hospital of Wannan Medical College), Wuhu, People's Republic of China
| | - Bingbing Zhang
- Department of Neurosurgery, The First Affiliated Hospital of Wannan Medical College (Yijishan Hospital of Wannan Medical College), Wuhu, People's Republic of China
| | - Xuanzhi Wang
- Department of Neurosurgery, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, People's Republic of China
| | - Xinggen Fang
- Department of Neurosurgery, The First Affiliated Hospital of Wannan Medical College (Yijishan Hospital of Wannan Medical College), Wuhu, People's Republic of China
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21
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Yasuda R, Satow T, Hashimura N, Nishimura M, Takahashi JC, Kataoka H. Usefulness of Craniograms in Discriminating Coiled Intracranial Aneurysms Requiring Retreatment. Neurol Med Chir (Tokyo) 2021; 62:118-124. [PMID: 34880195 PMCID: PMC8918367 DOI: 10.2176/nmc.oa.2021-0225] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
While endovascular coil embolization has become one of the major therapeutic modalities for intracranial aneurysms, long-term imaging follow-up is required because of the higher rate of retreatment compared with surgical clipping. The purpose of this study was to show the usefulness of craniograms to discriminate coiled intracranial aneurysms that required retreatment. Under the study protocol approved by institutional review board, a retrospective review of the medical record was done regarding coil embolization for intracranial aneurysms performed between January 2014 and December 2018. Coil embolization performed as the initial treatment and followed up for more than 1 year without additional treatment, and those performed as retreatment after the initial coil embolization performed at our institution were recruited. Craniograms obtained just after the initial treatment were compared with those obtained just before the additional treatment in the retreated cases and compared with the latest ones in the non-recurrence cases. Correlation between the morphological changes in the coil mass on the craniograms and retreatments was evaluated. During the study period, 288 coil embolization procedures for intracranial aneurysms were performed. From these, 191 treatments that were followed up for more than 1 year without any additional treatments and 30 retreatments were included. Morphological change of the coil mass was observed in 4 of the 191 non-recurrence treatments and 26 of the 30 retreatments, which was significantly correlated with retreatments (p <0.001). Craniogram was a useful modality in following up the coiled intracranial aneurysms to detect those required retreatments.
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Affiliation(s)
- Ryuta Yasuda
- Department of Neurosurgery, National Cerebral and Cardiovascular Center.,Department of Neurosurgery, Mie Graduate school of Medicine, Faculty of Medicine
| | - Tetsu Satow
- Department of Neurosurgery, National Cerebral and Cardiovascular Center
| | - Naoki Hashimura
- Department of Neurosurgery, National Cerebral and Cardiovascular Center
| | - Masaki Nishimura
- Department of Neurosurgery, National Cerebral and Cardiovascular Center
| | - Jun C Takahashi
- Department of Neurosurgery, National Cerebral and Cardiovascular Center
| | - Hiroharu Kataoka
- Department of Neurosurgery, National Cerebral and Cardiovascular Center
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22
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Liu J, Li W, Zhang Y, Wang K, Yang X, Zhang Y. Hemodynamic analysis for endovascular treatment in small unruptured intracranial aneurysms: a matched comparison study of flow diverter versus LVIS. Chin Neurosurg J 2021; 7:49. [PMID: 34852851 PMCID: PMC8638548 DOI: 10.1186/s41016-021-00266-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Accepted: 11/08/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND We compared the treatment of small unruptured intracranial aneurysms (UIAs) with flow diverter and LVIS-assisted coiling to determine the effects of hemodynamic changes caused by different stent and coil packing in endovascular treatment. METHODS Fifty-one UIAs in 51 patients treated with pipeline embolization device (PED) were included in this study and defined as the PED group. We matched controls 1:1 and enrolled 51 UIAs who were treated with LVIS stent, which were defined as the LVIS group. Computational fluid dynamics were performed to assess hemodynamic alterations between PED and LVIS. Clinical analysis was also performed between these two groups after the match. RESULTS There was no difference in procedural complications between the two groups (P = 0.558). At the first angiographic follow-up, the complete occlusion rate was significantly higher in the LVIS group compared with that in the PED group (98.0% vs. 82.4%, P = 0.027). However, during the further angiographic follow-up, the complete occlusion rate in the PED group achieved 100%, which was higher than that in the LVIS group (98.0%). Compared with the LVIS group after treatment, cases in the PED group showed a higher value of velocity in the aneurysm (0.03 ± 0.09 vs. 0.01 ± 0.01, P = 0.037) and WSS on the aneurysm (2.32 ± 5.40 vs. 0.33 ± 0.47, P = 0.011). Consequently, the reduction ratios of these two parameters also showed statistical differences. These parameters in the LVIS group showed much higher reduction ratios. However, the reduction ratio of the velocity on the neck plane was comparable between two groups. CONCLUSIONS Both LVIS and PED were safe and effective for the treatment of small UIAs. However, LVIS-assisted coiling produced greater hemodynamic alterations in the aneurysm sac compared with PED. The hemodynamics in the aneurysm neck may be a key factor for aneurysm outcome.
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Affiliation(s)
- Jian Liu
- Department of Interventional Neuroradiology, Beijing Neurosurgical Institute and Beijing Tian Tan Hospital, Capital Medical University, No.119, South 4th Ring West Road, Fengtai District, Beijing, China
| | - Wenqiang Li
- Department of Interventional Neuroradiology, Beijing Neurosurgical Institute and Beijing Tian Tan Hospital, Capital Medical University, No.119, South 4th Ring West Road, Fengtai District, Beijing, China
| | - Yisen Zhang
- Department of Interventional Neuroradiology, Beijing Neurosurgical Institute and Beijing Tian Tan Hospital, Capital Medical University, No.119, South 4th Ring West Road, Fengtai District, Beijing, China
| | - Kun Wang
- Department of Interventional Neuroradiology, Beijing Neurosurgical Institute and Beijing Tian Tan Hospital, Capital Medical University, No.119, South 4th Ring West Road, Fengtai District, Beijing, China
| | - Xinjian Yang
- Department of Interventional Neuroradiology, Beijing Neurosurgical Institute and Beijing Tian Tan Hospital, Capital Medical University, No.119, South 4th Ring West Road, Fengtai District, Beijing, China.
| | - Ying Zhang
- Department of Interventional Neuroradiology, Beijing Neurosurgical Institute and Beijing Tian Tan Hospital, Capital Medical University, No.119, South 4th Ring West Road, Fengtai District, Beijing, China.
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23
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Zhang Q, Shao Q, Chang K, Zhang H, He Y, Andrade-Barazarte H, Sheng Z, Mo X, Zemmar A, Li L, Li T. Safety and Efficacy of Coils in Conjunction With the Pipeline Flex Embolization Device for the Treatment of Cerebral Aneurysms. Front Neurol 2021; 12:651465. [PMID: 34759878 PMCID: PMC8573379 DOI: 10.3389/fneur.2021.651465] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Accepted: 09/21/2021] [Indexed: 01/26/2023] Open
Abstract
Background: Flow diverters (FD) have shown promising results in the treatment of intracranial aneurysms (IAs). However, there is still controversy whether pipeline flex embolization device (PED flex)-assisted coils can facilitate the curing of aneurysms. Our aim was to assess the safety and effectiveness of PED flex adjunctive with coils (PED flex + coil) in the treatment of IAs. Method: Patients who underwent PED flex treatment in combination with coiling between January 2018 and June 2020 were included in this study. The clinical and radiographic characteristics before and after treatments were retrospectively evaluated. The study cohort comprised of 125 patients with 140 IAs, which was subdivided into two subgroups: one group included patients treated only through PED alone, and the other group included patients treated through PED flex adjunctive with coil. Patient baseline characteristics, aneurysm characteristics, treatment-related factors, and outcomes were analyzed to determine the effectiveness of both techniques. Results: Aneurysms in the PED flex + coil group were larger (10.0 ± 5.8 mm, P < 0.001) and wider (7.2 ± 4.6 mm, P = 0.002) compared with those in the PED flex group. There was no statistical difference in the perioperative complication rate between the two groups. The overall complete occlusion rate was 75.7% at 6.2 months, with 71.7% at 6.2 ± 1.7 months in the PED flex group and 85.4% at 6.2 ± 1.8 months in the PED flex + coil group, respectively. A higher percentage of satisfactory angiography results was found in the PED flex + coil group during follow-up (92.7 vs. 78.8%, P = 0.047). Conclusion: PED flex placement with adjunctive coil embolization represents a safe alternative option for the treatment of IAs. In these cases, coil embolization increases the occlusion rate in PED flex-treated patients without increasing the periprocedural complications.
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Affiliation(s)
- Qianqian Zhang
- Department of Interventional Neuroradiology, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, Henan University People's Hospital, Zhengzhou, China.,Henan International Joint Laboratory of Cerebrovascular Disease, Henan Engineering Research Center of Cerebrovascular Intervention, Henan Provincial People's Hospital, Zhengzhou, China.,Department of Neurosurgery, Henan Provincial People's Hospital, Henan University People's Hospital, Henan University School of Medicine, Zhengzhou University People's Hospital, Zhengzhou, China
| | - Qiuji Shao
- Department of Interventional Neuroradiology, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, Henan University People's Hospital, Zhengzhou, China.,Henan International Joint Laboratory of Cerebrovascular Disease, Henan Engineering Research Center of Cerebrovascular Intervention, Henan Provincial People's Hospital, Zhengzhou, China
| | - Kaitao Chang
- Department of Interventional Neuroradiology, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, Henan University People's Hospital, Zhengzhou, China.,Henan International Joint Laboratory of Cerebrovascular Disease, Henan Engineering Research Center of Cerebrovascular Intervention, Henan Provincial People's Hospital, Zhengzhou, China
| | - Hongyun Zhang
- Department of Interventional Neuroradiology, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, Henan University People's Hospital, Zhengzhou, China.,Henan International Joint Laboratory of Cerebrovascular Disease, Henan Engineering Research Center of Cerebrovascular Intervention, Henan Provincial People's Hospital, Zhengzhou, China
| | - Yingkun He
- Department of Interventional Neuroradiology, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, Henan University People's Hospital, Zhengzhou, China.,Henan International Joint Laboratory of Cerebrovascular Disease, Henan Engineering Research Center of Cerebrovascular Intervention, Henan Provincial People's Hospital, Zhengzhou, China
| | - Hugo Andrade-Barazarte
- Department of Neurosurgery, Henan Provincial People's Hospital, Henan University People's Hospital, Henan University School of Medicine, Zhengzhou University People's Hospital, Zhengzhou, China
| | - Zhiyuan Sheng
- Department of Neurosurgery, Zhengzhou University People's Hospital, Henan Provincial People's Hospital, Zhengzhou, China
| | - Xiao Mo
- Beijing Key Laboratory of Fundamental Research on Biomechanics in Clinical Application, School of Biomedical Engineering, Capital Medical University, Beijing, China
| | - Ajmal Zemmar
- Department of Neurosurgery, Henan Provincial People's Hospital, Henan University People's Hospital, Henan University School of Medicine, Zhengzhou University People's Hospital, Zhengzhou, China
| | - Li Li
- Department of Interventional Neuroradiology, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, Henan University People's Hospital, Zhengzhou, China.,Henan International Joint Laboratory of Cerebrovascular Disease, Henan Engineering Research Center of Cerebrovascular Intervention, Henan Provincial People's Hospital, Zhengzhou, China
| | - Tianxiao Li
- Department of Interventional Neuroradiology, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, Henan University People's Hospital, Zhengzhou, China.,Henan International Joint Laboratory of Cerebrovascular Disease, Henan Engineering Research Center of Cerebrovascular Intervention, Henan Provincial People's Hospital, Zhengzhou, China.,Department of Neurosurgery, Henan Provincial People's Hospital, Henan University People's Hospital, Henan University School of Medicine, Zhengzhou University People's Hospital, Zhengzhou, China
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24
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Li G, Song X, Wang H, Liu S, Ji J, Guo Y, Qiao A, Liu Y, Wang X. Prediction of Cerebral Aneurysm Hemodynamics With Porous-Medium Models of Flow-Diverting Stents via Deep Learning. Front Physiol 2021; 12:733444. [PMID: 34603085 PMCID: PMC8484706 DOI: 10.3389/fphys.2021.733444] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Accepted: 08/19/2021] [Indexed: 11/26/2022] Open
Abstract
The interventional treatment of cerebral aneurysm requires hemodynamics to provide proper guidance. Computational fluid dynamics (CFD) is gradually used in calculating cerebral aneurysm hemodynamics before and after flow-diverting (FD) stent placement. However, the complex operation (such as the construction and placement simulation of fully resolved or porous-medium FD stent) and high computational cost of CFD hinder its application. To solve these problems, we applied aneurysm hemodynamics point cloud data sets and a deep learning network with double input and sampling channels. The flexible point cloud format can represent the geometry and flow distribution of different aneurysms before and after FD stent (represented by porous medium layer) placement with high resolution. The proposed network can directly analyze the relationship between aneurysm geometry and internal hemodynamics, to further realize the flow field prediction and avoid the complex operation of CFD. Statistical analysis shows that the prediction results of hemodynamics by our deep learning method are consistent with the CFD method (error function <13%), but the calculation time is significantly reduced 1,800 times. This study develops a novel deep learning method that can accurately predict the hemodynamics of different cerebral aneurysms before and after FD stent placement with low computational cost and simple operation processes.
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Affiliation(s)
- Gaoyang Li
- Institute of Fluid Science, Tohoku University, Sendai, Japan
| | - Xiaorui Song
- Department of Radiology, Shandong First Medical University and Shandong Academy of Medical Sciences, Tai'an, China
| | - Haoran Wang
- Institute of Fluid Science, Tohoku University, Sendai, Japan
| | - Siwei Liu
- Institute of Fluid Science, Tohoku University, Sendai, Japan
| | - Jiayuan Ji
- Institute of Fluid Science, Tohoku University, Sendai, Japan
| | - Yuting Guo
- Institute of Fluid Science, Tohoku University, Sendai, Japan
| | - Aike Qiao
- Faculty of Environment and Life, Beijing University of Technology, Beijing, China
| | - Youjun Liu
- Faculty of Environment and Life, Beijing University of Technology, Beijing, China
| | - Xuezheng Wang
- Department of Radiology, Shandong First Medical University and Shandong Academy of Medical Sciences, Tai'an, China
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25
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Pumar J, Mosqueira A, Blanco-Ulla M, Vazquez-Herrero F. Recanalization and rupture of a brain aneurysm completely occluded with a LEO stent nine years ago. INTERDISCIPLINARY NEUROSURGERY 2021. [DOI: 10.1016/j.inat.2021.101231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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26
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Wiśniewski K, Tyfa Z, Tomasik B, Reorowicz P, Bobeff EJ, Posmyk BJ, Hupało M, Stefańczyk L, Jóźwik K, Jaskólski DJ. Risk Factors for Recanalization after Coil Embolization. J Pers Med 2021; 11:jpm11080793. [PMID: 34442437 PMCID: PMC8398571 DOI: 10.3390/jpm11080793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Accepted: 08/11/2021] [Indexed: 11/19/2022] Open
Abstract
The aim of our study was to identify risk factors for recanalization 6 months after coil embolization using clinical data followed by computational fluid dynamics (CFD) analysis. Methods: Firstly, clinical data of 184 patients treated with coil embolization were analyzed retrospectively. Secondly, aneurysm models for high/low recanalization risk were generated based on ROC curves and their cut-off points. Afterward, CFD was utilized to validate the results. Results: In multivariable analysis, aneurysm filling during the first embolization was an independent risk factor whilst packing density was a protective factor of recanalization after 6 months in patients with aSAH. For patients with unruptured aneurysms, packing density was found to be a protective factor whilst the aneurysm neck size was an independent risk factor. Complex flow pattern and multiple vortices were associated with aneurysm shape and were characteristic of the high recanalization risk group. Conclusions: Statistical analysis suggested that there are various factors influencing recanalization risk. Once certain values of morphometric parameters are exceeded, a complex flow with numerous vortices occurs. This phenomenon was revealed due to CFD investigations that validated our statistical research. Thus, the complex flow pattern itself can be treated as a relevant recanalization predictor.
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Affiliation(s)
- Karol Wiśniewski
- Department of Neurosurgery and Neurooncology, Medical University of Lodz, Kopcińskiego 22, 90-153 Lodz, Poland; (E.J.B.); (B.J.P.); (M.H.); (D.J.J.)
- Correspondence: ; Tel.: +48-042-6776770
| | - Zbigniew Tyfa
- Institute of Turbomachinery, Medical Apparatus Division, Lodz University of Technology, Wolczanska 219/223, 90-924 Lodz, Poland; (Z.T.); (P.R.); (K.J.)
| | - Bartłomiej Tomasik
- Department of Biostatistics and Translational Medicine, Medical University of Lodz, 15 Mazowiecka St., 92-215 Lodz, Poland;
- Department of Radiation Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02215, USA
| | - Piotr Reorowicz
- Institute of Turbomachinery, Medical Apparatus Division, Lodz University of Technology, Wolczanska 219/223, 90-924 Lodz, Poland; (Z.T.); (P.R.); (K.J.)
| | - Ernest J. Bobeff
- Department of Neurosurgery and Neurooncology, Medical University of Lodz, Kopcińskiego 22, 90-153 Lodz, Poland; (E.J.B.); (B.J.P.); (M.H.); (D.J.J.)
| | - Bartłomiej J. Posmyk
- Department of Neurosurgery and Neurooncology, Medical University of Lodz, Kopcińskiego 22, 90-153 Lodz, Poland; (E.J.B.); (B.J.P.); (M.H.); (D.J.J.)
| | - Marlena Hupało
- Department of Neurosurgery and Neurooncology, Medical University of Lodz, Kopcińskiego 22, 90-153 Lodz, Poland; (E.J.B.); (B.J.P.); (M.H.); (D.J.J.)
| | - Ludomir Stefańczyk
- Department of Radiology-Diagnostic Imaging, Medical University of Lodz, Kopcińskiego 22, 90-153 Lodz, Poland;
| | - Krzysztof Jóźwik
- Institute of Turbomachinery, Medical Apparatus Division, Lodz University of Technology, Wolczanska 219/223, 90-924 Lodz, Poland; (Z.T.); (P.R.); (K.J.)
| | - Dariusz J. Jaskólski
- Department of Neurosurgery and Neurooncology, Medical University of Lodz, Kopcińskiego 22, 90-153 Lodz, Poland; (E.J.B.); (B.J.P.); (M.H.); (D.J.J.)
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27
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Ishii T, Fujimura S, Takao H, Uchiyama Y, Okudaira T, Ishibashi T, Otani K, Karagiozov K, Fukudome K, Yamamoto M, Murayama Y. Hemodynamic and Morphological Factors Related to Coil Compaction in Basilar Artery Tip Aneurysms. World Neurosurg 2021; 155:e95-e110. [PMID: 34389523 DOI: 10.1016/j.wneu.2021.08.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 08/02/2021] [Accepted: 08/03/2021] [Indexed: 11/29/2022]
Abstract
PURPOSE Coil compaction is directly related to the degree of cerebral aneurysmal recanalization. The Degree of Recanalization (DoR) was quantified by measuring the volume vacated by coil deformation. The purpose of this study was to clarify the hemodynamic and morphological factors associated with coil compaction. METHODS Computational fluid dynamics (CFD) simulations were performed on 28 middle size (5-10 mm), unruptured basilar artery tip aneurysms. The DoR was measured by comparing the coil mass shape obtained from three-dimensional digital subtraction angiography data immediately after coil embolization and again within 1 to 2 years of follow-up. Deployed coils were modeled using a virtual coiling technique for CFD simulations. Hemodynamic and morphological factors to predict the DoR were derived using multiple linear regression. RESULTS Aneurysmal neck area, the maximum pressure generated on the neck surface after coil embolization, and the high-pressure position on the neck surface predicted DoR with statistical significance (p<0.001, p<0.001, p=0.004, respectively). DoR tended to increase when the neck area was large, the pressure generated on the coils was high, and the high-pressure position was close to the center of the neck surface. The volume embolization ratio was not statistically relevant for the DoR in the cases of this study. CONCLUSIONS Coil compaction occurs in cerebral aneurysms with a wide neck, high pressure generated on the coils, and high pressure in the center of the neck surface. Establishing the DoR can contribute to the prediction of recanalization after coil embolization.
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Affiliation(s)
- Takumi Ishii
- Graduate School of Mechanical Engineering, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan; Department of Innovation for Medical Information Technology, The Jikei University School of Medicine, 3-25-8 Nishi-shinbashi, Minato-ku, Tokyo 105-8461, Japan
| | - Soichiro Fujimura
- Department of Innovation for Medical Information Technology, The Jikei University School of Medicine, 3-25-8 Nishi-shinbashi, Minato-ku, Tokyo 105-8461, Japan; Department of Mechanical Engineering, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan
| | - Hiroyuki Takao
- Graduate School of Mechanical Engineering, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan; Department of Innovation for Medical Information Technology, The Jikei University School of Medicine, 3-25-8 Nishi-shinbashi, Minato-ku, Tokyo 105-8461, Japan; Department of Neurosurgery, The Jikei University School of Medicine, 3-25-8 Nishi-shinbashi, Minato-ku, Tokyo 105-8461, Japan
| | - Yuya Uchiyama
- Graduate School of Mechanical Engineering, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan; Department of Innovation for Medical Information Technology, The Jikei University School of Medicine, 3-25-8 Nishi-shinbashi, Minato-ku, Tokyo 105-8461, Japan
| | - Takuma Okudaira
- Graduate School of Mechanical Engineering, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan; Department of Innovation for Medical Information Technology, The Jikei University School of Medicine, 3-25-8 Nishi-shinbashi, Minato-ku, Tokyo 105-8461, Japan
| | - Toshihiro Ishibashi
- Department of Neurosurgery, The Jikei University School of Medicine, 3-25-8 Nishi-shinbashi, Minato-ku, Tokyo 105-8461, Japan
| | - Katharina Otani
- Department of Neurosurgery, The Jikei University School of Medicine, 3-25-8 Nishi-shinbashi, Minato-ku, Tokyo 105-8461, Japan; Siemens Healthcare K.K. 1-11-1 Osaki, Shinagawa-ku, Tokyo 141-8644, Japan
| | - Kostadin Karagiozov
- Department of Neurosurgery, The Jikei University School of Medicine, 3-25-8 Nishi-shinbashi, Minato-ku, Tokyo 105-8461, Japan
| | - Koji Fukudome
- Department of Mechanical Engineering, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan
| | - Makoto Yamamoto
- Department of Mechanical Engineering, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan
| | - Yuichi Murayama
- Department of Neurosurgery, The Jikei University School of Medicine, 3-25-8 Nishi-shinbashi, Minato-ku, Tokyo 105-8461, Japan.
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28
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Lamooki SR, Tutino VM, Paliwal N, Damiano RJ, Waqas M, Nagesh SSV, Rajabzadeh-Oghaz H, Vakharia K, Siddiqui AH, Meng H. Evaluation of Two Fast Virtual Stenting Algorithms for Intracranial Aneurysm Flow Diversion. Curr Neurovasc Res 2021; 17:58-70. [PMID: 31987021 DOI: 10.2174/1567202617666200120141608] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 11/13/2019] [Accepted: 11/25/2019] [Indexed: 11/22/2022]
Abstract
BACKGROUND Endovascular treatment of intracranial aneurysms (IAs) by flow diverter (FD) stents depends on flow modification. Patient-specific modeling of FD deployment and computational fluid dynamics (CFD) could enable a priori endovascular strategy optimization. We developed a fast, simplistic, expansion-free balls-weeping algorithm to model FDs in patientspecific aneurysm geometry. However, since such strong simplification could result in less accurate simulations, we also developed a fast virtual stenting workflow (VSW) that explicitly models stent expansion using pseudo-physical forces. METHODS To test which of these two fast algorithms more accurately simulates real FDs, we applied them to virtually treat three representative patient-specific IAs. We deployed Pipeline Embolization Device into 3 patient-specific silicone aneurysm phantoms and simulated the treatments using both balls-weeping and VSW algorithms in computational aneurysm models. We then compared the virtually deployed FD stents against experimental results in terms of geometry and post-treatment flow fields. For stent geometry, we evaluated gross configurations and porosity. For post-treatment aneurysmal flow, we compared CFD results against experimental measurements by particle image velocimetry. RESULTS We found that VSW created more realistic FD deployments than balls-weeping in terms of stent geometry, porosity and pore density. In particular, balls-weeping produced unrealistic FD bulging at the aneurysm neck, and this artifact drastically increased with neck size. Both FD deployment methods resulted in similar flow patterns, but the VSW had less error in flow velocity and inflow rate. CONCLUSION In conclusion, modeling stent expansion is critical for preventing unrealistic bulging effects and thus should be considered in virtual FD deployment algorithms. Also endowed with its high computational efficiency and superior accuracy, the VSW algorithm is a better candidate for implementation into a bedside clinical tool for FD deployment simulation.
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Affiliation(s)
- Saeb R Lamooki
- Canon Stroke and Vascular Research Center, University at Buffalo, Buffalo, NY, United States.,Department of Mechanical & Aerospace Engineering, University at Buffalo, Buffalo, NY, United States
| | - Vincent M Tutino
- Canon Stroke and Vascular Research Center, University at Buffalo, Buffalo, NY, United States.,Department of Biomedical Engineering, University at Buffalo, Buffalo, NY, United States.,Department of Neurosurgery, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, United States.,Department of Pathology and Anatomical Sciences, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, United States
| | - Nikhil Paliwal
- Canon Stroke and Vascular Research Center, University at Buffalo, Buffalo, NY, United States.,Department of Mechanical & Aerospace Engineering, University at Buffalo, Buffalo, NY, United States
| | - Robert J Damiano
- Canon Stroke and Vascular Research Center, University at Buffalo, Buffalo, NY, United States.,Department of Mechanical & Aerospace Engineering, University at Buffalo, Buffalo, NY, United States
| | - Muhammad Waqas
- Canon Stroke and Vascular Research Center, University at Buffalo, Buffalo, NY, United States.,Department of Neurosurgery, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, United States
| | - Setlur S V Nagesh
- Canon Stroke and Vascular Research Center, University at Buffalo, Buffalo, NY, United States.,Department of Neurosurgery, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, United States.,Department of Radiology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, United States
| | - Hamidreza Rajabzadeh-Oghaz
- Canon Stroke and Vascular Research Center, University at Buffalo, Buffalo, NY, United States.,Department of Mechanical & Aerospace Engineering, University at Buffalo, Buffalo, NY, United States
| | - Kunal Vakharia
- Department of Neurosurgery, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, United States
| | - Adnan H Siddiqui
- Canon Stroke and Vascular Research Center, University at Buffalo, Buffalo, NY, United States.,Department of Neurosurgery, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, United States.,Department of Neurology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, United States
| | - Hui Meng
- Canon Stroke and Vascular Research Center, University at Buffalo, Buffalo, NY, United States.,Department of Mechanical & Aerospace Engineering, University at Buffalo, Buffalo, NY, United States.,Department of Biomedical Engineering, University at Buffalo, Buffalo, NY, United States.,Department of Neurosurgery, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, United States
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29
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Li W, Zhu W, Sun X, Liu J, Wang Y, Wang K, Zhang Y, Yang X, Zhang Y. Retreatment With Flow Diverters and Coiling for Recurrent Aneurysms After Initial Endovascular Treatment: A Propensity Score-Matched Comparative Analysis. Front Neurol 2021; 12:625652. [PMID: 34149588 PMCID: PMC8209336 DOI: 10.3389/fneur.2021.625652] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Accepted: 04/26/2021] [Indexed: 11/13/2022] Open
Abstract
Background: Flow diverters and conventional coiling are established modalities for the retreatment of intracranial recurrent aneurysms after initial endovascular treatment. We aimed to compare the efficacy of these techniques. Methods: We retrospectively analyzed data for patients with recurrent aneurysms after initial endovascular treatment retreated in our center with either a pipeline embolization device (PED) or conventional coil embolization from January 2012 to July 2020. We performed 1:2 propensity score matching (PSM) using the nearest neighbor method. We controlled for: initial treatment strategy, aneurysm size, neck diameter, symptom presentation, history of aneurysm rupture, age, sex, fusiform-dissecting aneurysm, bifurcation aneurysm, and aneurysm location. The clinical and morphological factors of all patients at initial treatment and the angiographic and clinical results at the second treatment were collected and compared between the propensity-matched pairs. Results: A total of 105 intracranial aneurysms were identified; 18 patients (17.1%) were treated with a PED, and 87 (82.9%) were treated via conventional coil embolization. PSM resulted in 12 matched pairs (12 patients in the PED group and 24 in the coiling group). There was no significant difference of ischemic and hemorrhagic complications between the groups, the obliteration rate of branches covered by stent, or modified Rankin Scale scores at the last clinical follow-up. Importantly, the retreatment strategy in the PED group provided significantly different results vs. the coiling group (P < 0.001), with a lower recurrence rate (0.0 vs. 29.2%, respectively; P = 0.037). However, the procedural failure rate and the parent artery stenosis were more frequently in PED group compared with coiling group (both were 16.7 vs. 0.0%; P = 0.040). Conclusions: Endovascular retreatment for recurrent aneurysms after initial endovascular treatment might be safe and effective. Flow diverters might be associated with reduced risk of recanalization and an increased risk of procedural failure and mild parent artery stenosis.
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Affiliation(s)
- Wenqiang Li
- Department of Neurosurgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.,Department of Interventional Neuroradiology, Beijing Neurosurgical Institute and Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Wei Zhu
- Department of Interventional Neuroradiology, Beijing Neurosurgical Institute and Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Xinguo Sun
- Department of Neurosurgery, Binzhou People's Hospital, Binzhou, China
| | - Jian Liu
- Department of Interventional Neuroradiology, Beijing Neurosurgical Institute and Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Yang Wang
- Department of Neurosurgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Kun Wang
- Department of Interventional Neuroradiology, Beijing Neurosurgical Institute and Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Ying Zhang
- Department of Interventional Neuroradiology, Beijing Neurosurgical Institute and Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Xinjian Yang
- Department of Interventional Neuroradiology, Beijing Neurosurgical Institute and Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Yisen Zhang
- Department of Interventional Neuroradiology, Beijing Neurosurgical Institute and Beijing Tiantan Hospital, Capital Medical University, Beijing, China
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30
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Li W, Zhu W, Liu J, Yang X. Imbalanced flow changes of distal arteries: An important factor in process of delayed ipsilateral parenchymal hemorrhage after flow diversion in patients with cerebral aneurysms. Interv Neuroradiol 2021; 27:788-797. [PMID: 33823618 DOI: 10.1177/15910199211009120] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND AND OBJECTIVE Hemodynamic forces may play a role in symptomatic delayed ipsilateral parenchymal hemorrhage (DIPH) of intracranial aneurysm (IA) after flow diverter placement. We aimed to investigate the hemodynamic risk factors in the postsurgical DIPH process. METHODS Six patients with internal carotid artery (ICA) aneurysm developed to DIPH and 12 patients without DIPH (1:2 matched controls) after flow diverter were included between January 2015 to January 2019. Postsurgical hemodynamics of distal arteries (terminal ICA, middle cerebral artery (MCA), anterior cerebral artery (ACA)) were investigated using computational fluid dynamics, as well as the hemodynamic alteration between pre- and post-treatment. The DIPH related and unrelated distal arteries (either MCA or ACA) were discriminated and compared. Definition of imbalance index is the difference in increased velocity post-flow diverter between MCA and ACA and was used to evaluate the blood flow distribution of distal arteries. RESULTS The mean and maximum flow velocities in the terminal ICA increased significantly after treatment in both groups. In DIPH group, the increase rate of mean velocity in the DIPH-related artery was significantly higher than that in DIPH-unrelated artery after the treatment (20.98 ± 15.38% vs -6.40 ± 7.74%; p = 0.028). Between the DIPH and control group, the baseline characteristics were well matched. However, a higher imbalance index of mean velocity was found in DIPH group (27.38 ± 13.03% vs 10.85 ± 14.12%; p = 0.031). CONCLUSION The mean velocity of DIPH related artery increased more, and the imbalance in increased blood flow distribution of distal arteries might play an important role in DIPH after flow diverter of IAs.
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Affiliation(s)
- Wenqiang Li
- Department of Interventional Neuroradiology, Beijing Neurosurgical Institute and Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Wei Zhu
- Department of Interventional Neuroradiology, Beijing Neurosurgical Institute and Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Jian Liu
- Department of Interventional Neuroradiology, Beijing Neurosurgical Institute and Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Xinjian Yang
- Department of Interventional Neuroradiology, Beijing Neurosurgical Institute and Beijing Tiantan Hospital, Capital Medical University, Beijing, China
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31
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Levitt MR, Aliseda A, Fiorella D, Sadasivan C. One way to get there. J Neurointerv Surg 2021; 13:401-402. [PMID: 33785640 DOI: 10.1136/neurintsurg-2021-017559] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/22/2021] [Indexed: 11/03/2022]
Affiliation(s)
- Michael R Levitt
- Neurological Surgery, Radiology, Mechanical Engineering, and Stroke & Applied Neuroscience Center, University of Washington, Seattle, Washington, USA
| | - Alberto Aliseda
- Mechanical Engineering, Neurological Surgery, and Stroke & Applied Neuroscience Center, University of Washington, Seattle, Washington, USA
| | - David Fiorella
- Department of Neurosurgery, Stony Brook University, Stony Brook, New York, USA
| | - Chander Sadasivan
- Department of Neurosurgery, Stony Brook University, Stony Brook, New York, USA
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32
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Suzuki T, Hasegawa H, Ando K, Shibuya K, Takahashi H, Saito S, Oishi M, Fujii Y. Possibility of Worsening Flow Diversion Effect Due to Morphological Changes of a Stented Artery With Multiple Overlapping Stents for Partially Thrombosed Vertebral Artery Aneurysms. Front Neurol 2021; 11:611124. [PMID: 33384657 PMCID: PMC7770215 DOI: 10.3389/fneur.2020.611124] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Accepted: 11/23/2020] [Indexed: 11/13/2022] Open
Abstract
Background: Morphological changes of a stented artery can cause a flow diversion effect to reduce intra-aneurysmal flow; however, there is a potential for the negative effect of increased intra-aneurysmal flow. We present cases with multiple overlapping stents for a partially thrombosed vertebral artery aneurysm and characterize the hemodynamic properties of a recurrent case by focusing on the morphological changes of the stented artery. Methods: Between October 2017 and April 2019, four consecutive cases of symptomatic unruptured large and giant partially thrombosed vertebral artery aneurysms were treated with multiple overlapping low-profile visualized intraluminal support stents and no coils. Both angiographic and clinical outcomes were assessed. Computational fluid dynamics analysis was performed to clarify hemodynamic features. The degree of pressure elevation was calculated as the pressure difference (Pd). Wall shear stress (WSS) was also calculated. Results: In three of the four cases, successful flow reduction was achieved with no morphological change of the stented arteries. The patients' symptoms were gradually improved. The remaining case required additional stents after the initial treatment. In the recurrent case, Pd was noticeably elevated at the aneurysm neck after treatment, and WSS was generally increased in the area due to altered blood flow into the aneurysm dome caused by morphological changes of the stented artery. Conclusion: Overlapping stents can be used for the treatment of large and giant thrombosed vertebral artery aneurysms with flow diversion effect; however, morphological changes of the stented artery requires careful attention as it may lead to an increase in the intra-aneurysmal flow, causing negative outcomes.
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Affiliation(s)
- Tomoaki Suzuki
- Department of Neurosurgery, Brain Research Institute, Niigata University, Niigata, Japan
| | - Hitoshi Hasegawa
- Department of Neurosurgery, Brain Research Institute, Niigata University, Niigata, Japan
| | - Kazuhiro Ando
- Department of Neurosurgery, Brain Research Institute, Niigata University, Niigata, Japan
| | - Kouhei Shibuya
- Department of Neurosurgery, Brain Research Institute, Niigata University, Niigata, Japan
| | - Haruhiko Takahashi
- Department of Neurosurgery, Brain Research Institute, Niigata University, Niigata, Japan
| | - Shoji Saito
- Department of Neurosurgery, Brain Research Institute, Niigata University, Niigata, Japan
| | - Makoto Oishi
- Department of Neurosurgery, Brain Research Institute, Niigata University, Niigata, Japan
| | - Yukihiko Fujii
- Department of Neurosurgery, Brain Research Institute, Niigata University, Niigata, Japan
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Thaci B, Nuño M, Varshneya K, Gerndt CH, Kercher M, Dahlin BC, Waldau B. Three-dimensional aneurysm volume measurements show no correlation between coil packing density and recurrence. Heliyon 2020; 6:e05170. [PMID: 33083618 PMCID: PMC7551363 DOI: 10.1016/j.heliyon.2020.e05170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2020] [Revised: 07/03/2020] [Accepted: 10/02/2020] [Indexed: 11/30/2022] Open
Abstract
Objective Endovascular treatment is the mainstay therapy for brain aneurysms. About 15% of patients need re-treatment within six months due to early recanalization. In this study, we investigate risk factors associated with treatment failure. Methods This retrospective cohort study includes endovascularly treated aneurysm cases between July 2012 and December 2015 at the University of California Davis Medical Center with pre-treatment and early post-treatment imaging. Thin cut 3D aneurysm volume rendering was used for morphologic analyses. Univariate and bivariate analyses were conducted to evaluate differences between patients and clinical factors by treatment failure. Results Of the 50 patients who met the inclusion criteria, 41 (82.0%) were female, with an average age of 61 years. Most aneurysms were on the anterior communicating artery (40%) or posterior communicating artery (22.0%), and 34 (68%) aneurysms were ruptured. Early treatment failure was observed in 14 (28.0%) of endovascularly treated patients. Raymond-Roy class (RRC) was significantly associated with treatment failure (p = 0.0052), with 10 out of the 14 cases (71.4%) with early recanalization having an RRC of 3. Coil packing density did not associate with aneurysm recanalization (p = 0.61). Conclusion In our single institution series, patient characteristics, aneurysm characteristics, or coil packing density did not affect early aneurysm recanalization. RRC was the best predictor of early recanalization; however, further confirmation with additional studies are required. Although this study focused on early treatment failure, late recanalization has been shown with longer follow up. Further investigation into factors associated with late treatment failure will need further investigation. New intrasaccular devices and flow diverters will also likely play a role in reducing recurrence in the future as these treatments gain usage.
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Affiliation(s)
- Bart Thaci
- Department of Neurological Surgery, University of California, Davis Medical Center, Sacramento, USA
| | - Miriam Nuño
- Department of Public Health Sciences, Division of Biostatistics, University of California Davis, Davis, USA
| | - Kunal Varshneya
- Department of Neurosurgery, Stanford University School of Medicine, USA
| | - Clayton H Gerndt
- Department of Neurological Surgery, University of California, Davis Medical Center, Sacramento, USA
| | - Matthew Kercher
- Department of Neurological Surgery, University of California, Davis Medical Center, Sacramento, USA
| | - Brian C Dahlin
- Department of Interventional Radiology, University of California, Davis Medical Center, Sacramento, USA
| | - Ben Waldau
- Department of Neurological Surgery, University of California, Davis Medical Center, Sacramento, USA
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34
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Suzuki T, Genkai N, Nomura T, Abe H. Assessing the Hemodynamics in Residual Cavities of Intracranial Aneurysm after Coil Embolization with Combined Computational Flow Dynamics and Silent Magnetic Resonance Angiography. J Stroke Cerebrovasc Dis 2020; 29:105290. [PMID: 32992205 DOI: 10.1016/j.jstrokecerebrovasdis.2020.105290] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 08/21/2020] [Accepted: 08/26/2020] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND AND PURPOSE Metal artifacts limit computational fluid dynamics analysis after coil embolization. Silent magnetic resonance angiography reduces metal artifacts and improves visualization of the residual cavity of coil-embolized aneurysms. This study investigated the flow dynamics of the residual cavity after coil embolization using silent magnetic resonance angiography and computational fluid dynamics to elucidate the hemodynamic characteristics of recanalization. METHODS Twenty internal carotid-posterior communicating aneurysm cases treated with coil embolization and without stent assistance were followed up (mean±standard deviation, 13.0±6.1 months) and assessed using silent magnetic resonance angiography. The hemodynamic characteristics of the residual cavities in both types of aneurysms were compared between neck remnants, which persisted for >12 months (NR group), and those treated with coil compaction-induced body filling (BF group). Computational fluid dynamics analysis of each aneurysm was performed using morphological data obtained from silent magnetic resonance angiography. Pressure, pressure difference, normalized wall shear stress, and flow velocity were measured. RESULTS The residual cavity was well-visualized using silent magnetic resonance angiography and compared with those imaged using conventional time-of-flight magnetic resonance angiography, and eight internal carotid-posterior communicating aneurysms with neck remnants and body filling were investigated. The maximum pressure area was localized to the aneurysm wall in the NR group (n=4) and to sides of the coil surface in the BF group (n=4). No significant differences were observed for each hemodynamic parameter. CONCLUSIONS Combination of silent magnetic resonance angiography and computational fluid dynamics helps to understand the hemodynamic characteristics of residual cavity in coil- embolized aneurysms. The flow-impingement zone at the coil surface (maximum pressure area) may influence the risk for future coil compaction.
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Affiliation(s)
- Tomoaki Suzuki
- Department of Neurosurgery, Tachikawa General Hospital, 1-24 Asahioka, Nagaoka 940-8621, Japan; Department of Neurosurgery, Brain Research Institute, Niigata University, 1-757 Asahimachi-Dori, Niigata 951-8585, Japan.
| | - Nobuyuki Genkai
- Department of Neurosurgery, Tachikawa General Hospital, 1-24 Asahioka, Nagaoka 940-8621, Japan
| | - Toshiharu Nomura
- Department of Neurosurgery, Tachikawa General Hospital, 1-24 Asahioka, Nagaoka 940-8621, Japan
| | - Hiroshi Abe
- Department of Neurosurgery, Tachikawa General Hospital, 1-24 Asahioka, Nagaoka 940-8621, Japan
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Raper DMS, Rutledge C, Winkler EA, Abla AA. Definitive Treatment With Microsurgical Clipping After Recurrence and Rerupture of Coiled Anterior Cerebral Artery Aneurysms. Oper Neurosurg (Hagerstown) 2020; 19:393-402. [PMID: 32409831 DOI: 10.1093/ons/opaa103] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Accepted: 02/14/2020] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND The extent of obliteration of ruptured intracranial aneurysms treated with coil embolization has been correlated with the risk of rerupture. However, many practitioners consider that a small neck remnant is unlikely to result in significant risk after coiling. OBJECTIVE To report our recent experience with ruptured anterior cerebral artery aneurysms treated with endovascular coiling, which recurred or reruptured, requiring microsurgical clipping for subsequent treatment. METHODS Retrospective review of patients with intracranial aneurysms treated at our institution since August 2018. Patient and aneurysm characteristics, initial and subsequent treatment approaches, and outcomes were reviewed. RESULTS Six patients were included. Out of those 6 patients, 5 patients had anterior communicating artery aneurysms, and 1 patient had a pericallosal aneurysm. All initially presented with subarachnoid hemorrhage (SAH) and were treated with coiling. Recurrence occurred at a median of 7.5 mo. In 2 cases, retreatment was initially performed with repeat endovascular coiling, but further recurrence was observed. Rerupture from the residual or recurrent aneurysm occurred in 3 cases. In 2 cases, the aneurysm dome recurred; in 1 case, rerupture occurred from the neck. All 6 patients underwent treatment with microsurgical clipping. Follow-up catheter angiography demonstrated a complete occlusion of the aneurysm in all cases with the preservation of the parent vessel. CONCLUSION Anterior cerebral artery aneurysms may recur after endovascular treatment, and even small neck remnants present a risk of rerupture after an initial SAH. Complete treatment requires a complete exclusion of the aneurysm from the circulation. Even in cases that have been previously coiled, microsurgical clipping can represent a safe and effective treatment option.
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Affiliation(s)
- Daniel M S Raper
- Department of Neurological Surgery, University of California, San Francisco, San Francisco, California
| | - Caleb Rutledge
- Department of Neurological Surgery, University of California, San Francisco, San Francisco, California
| | - Ethan A Winkler
- Department of Neurological Surgery, University of California, San Francisco, San Francisco, California
| | - Adib A Abla
- Department of Neurological Surgery, University of California, San Francisco, San Francisco, California
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Tian Z, Zhang M, Li G, Jin R, Leng X, Zhang Y, Wang K, Zhang Y, Yang X, Xiang J, Liu J. Hemodynamic differences by increasing low profile visualized intraluminal support (LVIS) stent local compaction across intracranial aneurysm orifice. Interv Neuroradiol 2020; 26:557-565. [PMID: 32830566 DOI: 10.1177/1591019920952903] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND The Low-profile Visualized Intraluminal Support device (LVIS) has been successfully used to treat cerebral aneurysm, and the push-pull technique has been used clinically to compact the stent across aneurysm orifice. Our aim was to exhibit the hemodynamic effect of the compacted LVIS stent. METHODS Two patient-specific aneurysm models were constructed from three-dimensional angiographic images. The uniform LVIS stent, compacted LVIS and Pipeline Embolization Device (PED) with or without coil embolization were virtually deployed into aneurysm models to perform hemodynamic analysis. Intra-aneurysmal flow parameters were calculated to assess hemodynamic differences among different models. RESULTS The compacted LVIS had the highest metal coverage across the aneurysm orifice (case 1, 46.37%; case 2, 67.01%). However, the PED achieved the highest pore density (case 1, 19.56 pores/mm2; case 2, 18.07 pores/mm2). The compacted LVIS produced a much higher intra-aneurysmal flow reduction than the uniform LVIS. The PED showed a higher intra-aneurysmal flow reduction than the compacted LVIS in case 1, but the results were comparable in case 2. After stent placement, the intra-aneurysmal flow was further reduced as subsequent coil embolization. The compacted LVIS stent with coils produced a similar reduction in intra-aneurysmal flow to that of the PED. CONCLUSIONS The combined characteristics of stent metal coverage and pore density should be considered when assessing the flow diversion effects of stents. More intra-aneurysmal flow reductions could be introduced by compacted LVIS stent than the uniform one. Compared with PED, compacted LVIS stent may exhibit a flow-diverting effect comparable to that of the PED.
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Affiliation(s)
- Zhongbin Tian
- Department of Interventional Neuroradiology, Beijing Neurosurgical Institute and Beijing Tian Tan Hospital, Capital Medical University, Beijing, China
| | - Mingqi Zhang
- Department of Interventional Neuroradiology, Beijing Neurosurgical Institute and Beijing Tian Tan Hospital, Capital Medical University, Beijing, China
| | - Gaohui Li
- ArteryFlow Technology Co., Ltd, Hangzhou, China
| | - Rongbo Jin
- ArteryFlow Technology Co., Ltd, Hangzhou, China
| | | | - Ying Zhang
- Department of Interventional Neuroradiology, Beijing Neurosurgical Institute and Beijing Tian Tan Hospital, Capital Medical University, Beijing, China
| | - Kun Wang
- Department of Interventional Neuroradiology, Beijing Neurosurgical Institute and Beijing Tian Tan Hospital, Capital Medical University, Beijing, China
| | - Yisen Zhang
- Department of Interventional Neuroradiology, Beijing Neurosurgical Institute and Beijing Tian Tan Hospital, Capital Medical University, Beijing, China
| | - Xinjian Yang
- Department of Interventional Neuroradiology, Beijing Neurosurgical Institute and Beijing Tian Tan Hospital, Capital Medical University, Beijing, China
| | | | - Jian Liu
- Department of Interventional Neuroradiology, Beijing Neurosurgical Institute and Beijing Tian Tan Hospital, Capital Medical University, Beijing, China
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Rizvi A, Seyedsaadat SM, Alzuabi M, Murad MH, Kadirvel R, Brinjikji W, Kallmes DF. Long-Term Rupture Risk in Patients with Unruptured Intracranial Aneurysms Treated with Endovascular Therapy: A Systematic Review and Meta-Analysis. AJNR Am J Neuroradiol 2020; 41:1043-1048. [PMID: 32467181 DOI: 10.3174/ajnr.a6568] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2019] [Accepted: 03/19/2020] [Indexed: 12/23/2022]
Abstract
BACKGROUND Surveillance imaging of previously unruptured, coiled aneurysms remains routine even though reports of rupture of these aneurysms are extremely rare. PURPOSE We performed meta-analysis to examine long-term rupture risk over ≥1-year follow-up duration in patients with unruptured intracranial aneurysm who underwent endovascular therapy. DATA SOURCES Multiple databases were searched for relevant publications between 1995 and 2018. STUDY SELECTION Studies reporting outcome of long-term rupture risk over ≥1-year follow-up in treated patients with unruptured intracranial aneurysms were included. DATA ANALYSIS Random effects meta-analysis was used, and results were expressed as long-term rupture rate per 100 patient-year with respective 95% CIs. For ruptured aneurysms during follow-up, data were collected on size and completeness of initial Treatment. DATA SYNTHESIS Twenty-four studies were identified. Among 4842 patients with a mean follow-up duration of 3.2 years, a total of 12 patients (0.25%) experienced rupture of previous unruptured intracranial aneurysms after endovascular treatment. Nine of these 12 patients harbored aneurysms that were large, incompletely treated, or both. A total of 2 anterior circulation, small, completely coiled aneurysms subsequently ruptured. The long-term rupture rate per 100 patient-year for unruptured intracranial aneurysms treated with endovascular therapy was 0.48 (95% CI, 0.45-0.51). Retreatment was carried out in 236 (4.9%) of these 4842 patients. LIMITATIONS A limitation of the study is that a lack of systematic nature of follow-up and mean follow-up duration of 3.2 years are not sufficient to make general recommendations about aneurysm followup paradigms. CONCLUSIONS Given a 5% retreatment rate, postcoil embolization spontaneous rupture of previously unruptured, small- and medium-sized, well-treated aneurysms is exceedingly rare.
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Affiliation(s)
- A Rizvi
- From the Department of Radiology (A.R., S.M.S., M.A., R.K., W.B., D.F.K.) .,Department of Medicine (A.R.), University of Texas Medical Branch, Galveston, Texas
| | - S M Seyedsaadat
- From the Department of Radiology (A.R., S.M.S., M.A., R.K., W.B., D.F.K.)
| | - M Alzuabi
- From the Department of Radiology (A.R., S.M.S., M.A., R.K., W.B., D.F.K.)
| | - M H Murad
- Evidence-Based Practice Center (M.H.M.), Mayo Clinic, Rochester, Minnesota
| | - R Kadirvel
- From the Department of Radiology (A.R., S.M.S., M.A., R.K., W.B., D.F.K.)
| | - W Brinjikji
- From the Department of Radiology (A.R., S.M.S., M.A., R.K., W.B., D.F.K.).,Joint Department of Medical Imaging (W.B.), Toronto Western Hospital, Toronto, Ontario, Canada
| | - D F Kallmes
- From the Department of Radiology (A.R., S.M.S., M.A., R.K., W.B., D.F.K.)
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Byun J, Kwon DH, Lee DH, Park W, Park JC, Ahn JS. Radiosurgery for Cerebral Arteriovenous Malformation (AVM) : Current Treatment Strategy and Radiosurgical Technique for Large Cerebral AVM. J Korean Neurosurg Soc 2020; 63:415-426. [PMID: 32423182 PMCID: PMC7365281 DOI: 10.3340/jkns.2020.0008] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Accepted: 02/29/2020] [Indexed: 11/27/2022] Open
Abstract
Arteriovenous malformations (AVMs) are congenital anomalies of the cerebrovascular system. AVM harbors 2.2% annual hemorrhage risk in unruptured cases and 4.5% annual hemorrhage risk of previously ruptured cases. Stereotactic radiosurgery (SRS) have been shown excellent treatment outcomes for patients with small- to moderated sized AVM which can be achieved in 80–90% complete obliteration rate with a 2–3 years latency period. The most important factors are associated with obliteration after SRS is the radiation dose to the AVM. In our institutional clinical practice, now 22 Gy (50% isodose line) dose of radiation has been used for treatment of cerebral AVM in single-session radiosurgery. However, dose-volume relationship can be unfavorable for large AVMs when treated in a single-session radiosurgery, resulting high complication rates for effective dose. Thus, various strategies should be considered to treat large AVM. The role of pre-SRS embolization is permanent volume reduction of the nidus and treat high-risk lesion such as AVM-related aneurysm and high-flow arteriovenous shunt. Various staging technique of radiosurgery including volume-staged radiosurgery, hypofractionated radiotherapy and dose-staged radiosurgery are possible option for large AVM. The incidence of post-radiosurgery complication is varied, the incidence rate of radiological post-radiosurgical complication has been reported 30–40% and symptomatic complication rate was reported from 8.1% to 11.8%. In the future, novel therapy which incorporate endovascular treatment using liquid embolic material and new radiosurgical technique such as gene or cytokine-targeted radio-sensitization should be needed.
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Affiliation(s)
- Joonho Byun
- Department of Neurological Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Do Hoon Kwon
- Department of Neurological Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Do Heui Lee
- Department of Neurological Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Wonhyoung Park
- Department of Neurological Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Jung Cheol Park
- Department of Neurological Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Jae Sung Ahn
- Department of Neurological Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
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Funakoshi Y, Imamura H, Tani S, Adachi H, Fukumitsu R, Sunohara T, Omura Y, Matsui Y, Sasaki N, Fukuda T, Akiyama R, Horiuchi K, Kajiura S, Shigeyasu M, Iihara K, Sakai N. Predictors of Cerebral Aneurysm Rupture after Coil Embolization: Single-Center Experience with Recanalized Aneurysms. AJNR Am J Neuroradiol 2020; 41:828-835. [PMID: 32381548 PMCID: PMC7228172 DOI: 10.3174/ajnr.a6558] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Accepted: 02/22/2020] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Recanalization after coil embolization is widely studied. However, there are limited data on how recanalized aneurysms rupture. Herein, we describe our experience with the rupture of recanalized aneurysms and discuss the type of recanalized aneurysms at greatest rupture risk. MATERIALS AND METHODS A total of 426 unruptured aneurysms and 169 ruptured aneurysms underwent coil embolization in our institution between January 2009 and December 2017. Recanalization occurred in 38 (8.9%) of 426 unruptured aneurysms (unruptured group) and 37 (21.9%) of 169 ruptured aneurysms (ruptured group). The Modified Raymond-Roy classification on DSA was used to categorize the recanalization type. Follow-up DSA was scheduled until 6 months after treatment, and follow-up MRA was scheduled yearly. If recanalization was suspected on MRA, DSA was performed. RESULTS In the unruptured group, the median follow-up term was 74.0 months. Retreatment for recanalization was performed in 18 aneurysms. Four of 20 untreated recanalized aneurysms (0.94% of total coiled aneurysms) ruptured. In untreated recanalized aneurysms, class IIIb aneurysms ruptured significantly more frequently than class II and IIIa (P = .025). In the ruptured group, the median follow-up term was 28.0 months. Retreatment for recanalization was performed in 16 aneurysms. Four of 21 untreated recanalized aneurysms (2.37% of total coiled aneurysms) ruptured. Class IIIb aneurysms ruptured significantly more frequently than class II and IIIa (P = .02). CONCLUSIONS The types of recanalization after coil embolization may be predictors of rupture. Coiled aneurysms with class IIIb recanalization should undergo early retreatment because of an increased rupture risk.
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Affiliation(s)
- Y Funakoshi
- From the Department of Neurosurgery (Y.F., H.I., S.T., H.A., R.F., T.S., Y.O., Y.M., N.Sasaki, T.F., R.A., K.H., S.K., M.S., N.Sakai), Kobe City Medical Center General Hospital, Kobe, Japan
| | - H Imamura
- From the Department of Neurosurgery (Y.F., H.I., S.T., H.A., R.F., T.S., Y.O., Y.M., N.Sasaki, T.F., R.A., K.H., S.K., M.S., N.Sakai), Kobe City Medical Center General Hospital, Kobe, Japan
| | - S Tani
- From the Department of Neurosurgery (Y.F., H.I., S.T., H.A., R.F., T.S., Y.O., Y.M., N.Sasaki, T.F., R.A., K.H., S.K., M.S., N.Sakai), Kobe City Medical Center General Hospital, Kobe, Japan
| | - H Adachi
- From the Department of Neurosurgery (Y.F., H.I., S.T., H.A., R.F., T.S., Y.O., Y.M., N.Sasaki, T.F., R.A., K.H., S.K., M.S., N.Sakai), Kobe City Medical Center General Hospital, Kobe, Japan
| | - R Fukumitsu
- From the Department of Neurosurgery (Y.F., H.I., S.T., H.A., R.F., T.S., Y.O., Y.M., N.Sasaki, T.F., R.A., K.H., S.K., M.S., N.Sakai), Kobe City Medical Center General Hospital, Kobe, Japan
| | - T Sunohara
- From the Department of Neurosurgery (Y.F., H.I., S.T., H.A., R.F., T.S., Y.O., Y.M., N.Sasaki, T.F., R.A., K.H., S.K., M.S., N.Sakai), Kobe City Medical Center General Hospital, Kobe, Japan
| | - Y Omura
- From the Department of Neurosurgery (Y.F., H.I., S.T., H.A., R.F., T.S., Y.O., Y.M., N.Sasaki, T.F., R.A., K.H., S.K., M.S., N.Sakai), Kobe City Medical Center General Hospital, Kobe, Japan
| | - Y Matsui
- From the Department of Neurosurgery (Y.F., H.I., S.T., H.A., R.F., T.S., Y.O., Y.M., N.Sasaki, T.F., R.A., K.H., S.K., M.S., N.Sakai), Kobe City Medical Center General Hospital, Kobe, Japan
| | - N Sasaki
- From the Department of Neurosurgery (Y.F., H.I., S.T., H.A., R.F., T.S., Y.O., Y.M., N.Sasaki, T.F., R.A., K.H., S.K., M.S., N.Sakai), Kobe City Medical Center General Hospital, Kobe, Japan
| | - T Fukuda
- From the Department of Neurosurgery (Y.F., H.I., S.T., H.A., R.F., T.S., Y.O., Y.M., N.Sasaki, T.F., R.A., K.H., S.K., M.S., N.Sakai), Kobe City Medical Center General Hospital, Kobe, Japan
| | - R Akiyama
- From the Department of Neurosurgery (Y.F., H.I., S.T., H.A., R.F., T.S., Y.O., Y.M., N.Sasaki, T.F., R.A., K.H., S.K., M.S., N.Sakai), Kobe City Medical Center General Hospital, Kobe, Japan
| | - K Horiuchi
- From the Department of Neurosurgery (Y.F., H.I., S.T., H.A., R.F., T.S., Y.O., Y.M., N.Sasaki, T.F., R.A., K.H., S.K., M.S., N.Sakai), Kobe City Medical Center General Hospital, Kobe, Japan
| | - S Kajiura
- From the Department of Neurosurgery (Y.F., H.I., S.T., H.A., R.F., T.S., Y.O., Y.M., N.Sasaki, T.F., R.A., K.H., S.K., M.S., N.Sakai), Kobe City Medical Center General Hospital, Kobe, Japan
| | - M Shigeyasu
- From the Department of Neurosurgery (Y.F., H.I., S.T., H.A., R.F., T.S., Y.O., Y.M., N.Sasaki, T.F., R.A., K.H., S.K., M.S., N.Sakai), Kobe City Medical Center General Hospital, Kobe, Japan
| | - K Iihara
- Department of Neurosurgery (K.I.), Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - N Sakai
- From the Department of Neurosurgery (Y.F., H.I., S.T., H.A., R.F., T.S., Y.O., Y.M., N.Sasaki, T.F., R.A., K.H., S.K., M.S., N.Sakai), Kobe City Medical Center General Hospital, Kobe, Japan
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Delayed Progression to Major Recanalization in Coiled Aneurysms with Minor Recanalization at 36-Month Follow-up : Incidence and Related Risk Factors. Clin Neuroradiol 2020; 31:401-408. [PMID: 32144482 DOI: 10.1007/s00062-020-00887-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Accepted: 02/07/2020] [Indexed: 10/24/2022]
Abstract
PURPOSE The aim was to monitor aneurysms that show imaging evidence of minor recanalization 36 months after coil embolization and to determine the rate and related risk factors of major recanalization during more prolonged observation. METHODS A total of 54 patients with 55 aneurysms showing minor recanalization at 36-month follow-up imaging between 2011 and 2013 were retrospectively reviewed. Medical records and radiological data accumulating in the course of extended monitoring (mean 83.9 ± 21.5 months) were assessed. Incidence and average annual risk of progression to major recanalization were then calculated. Univariate and multivariate regression analyses were applied to determine possible risk factors for progression to major recanalization. RESULTS In the 55 aneurysms studied 26 showed sustained minor recanalization since month 6 of follow-up, whereas minor recanalization of 29 completely occluded coiled lesions appeared in follow-up images after 6-24 months. Only 8 coiled aneurysms (14.5%) with minor recanalization at 36 months progressed to major recanalization during 219.3 aneurysm-years of observation (3.6% per aneurysm-year), 2 surfacing within 72 months and 6 developing thereafter. Additional embolization was performed in six of these patients. By multivariate analysis, no clinical or anatomic factors were statistically linked to such progression, but younger age showed marginal significance (hazard ratio, HR = 1.076; p = 0.099). CONCLUSION Most coiled aneurysms (85.5%) showing minor recanalization at 36 months postembolization proved to be stable in extended observation. Given the low probability but seriousness of delayed major recanalization, careful monitoring is still warranted in this setting but at less frequent intervals (every 2-3 years) beyond 36 months.
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Damiano RJ, Tutino VM, Paliwal N, Patel TR, Waqas M, Levy EI, Davies JM, Siddiqui AH, Meng H. Aneurysm characteristics, coil packing, and post-coiling hemodynamics affect long-term treatment outcome. J Neurointerv Surg 2019; 12:706-713. [PMID: 31848217 DOI: 10.1136/neurintsurg-2019-015422] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 11/20/2019] [Accepted: 11/25/2019] [Indexed: 12/26/2022]
Abstract
BACKGROUND Recurrence of intracranial aneurysms after endovascular coiling is a serious clinical concern. OBJECTIVE We hypothesized that recurrence is associated with aneurysm morphology and flow, as well as the coil intervention and the induced flow modifications. METHODS We collected 52 primary-coiling aneurysm cases that were either occluded (n=34) or recurrent (n=18) at >1 year follow-up. We created aneurysm models from pre-coiling digital subtraction angiographic images, calculated aneurysm morphology, simulated pre-coiling hemodynamics, modeled coil deployment, and obtained post-coiling hemodynamics for each case. We performed univariable analysis on 26 morphologic, treatment-specific, and hemodynamic parameters to distinguish between recurrent and occluded groups, and multivariable analysis to identify independently significant parameters associated with recurrence. Univariable analysis was also performed on ruptured and unruptured aneurysm subcohorts separately to investigate if they shared specific significant parameters. RESULTS Recurrence was associated with pre-coiling aneurysm morphologic and flow parameters including larger size (maximum dimension and volume), larger neck (diameter, area, and neck-to-parent-artery ratio), and higher flow momentum and kinetic energy. Recurrence was also associated with lower coil packing (packing density and uncoiled volume), higher post-treatment flow (velocity, momentum, and kinetic energy), lower post-treatment washout time, and higher post-treatment impingement force at the neck. Multivariable analysis identified two aneurysmal characteristics (neck diameter and pre-coiling flow kinetic energy), one coil packing parameter (uncoiled volume), and one post-treatment hemodynamic parameter (flow momentum) that were independently associated with recurrence. In ruptured aneurysms, recurrence was associated with larger neck (diameter and area), whereas in unruptured aneurysms, recurrence was associated with larger size (maximum dimension and volume). In both subcohorts, recurrence was associated with higher post-coiling flow momentum and kinetic energy. CONCLUSION Recurrence at >1 year after coil treatment is associated with intrinsic aneurysm characteristics, coiling itself, and flow changes induced by coiling. Larger aneurysm size and neck, less coil packing, and higher intra-aneurysmal flow before and after coiling predict recurrence.
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Affiliation(s)
- Robert J Damiano
- Mechanical and Aerospace Engineering, Canon Stroke & Vascular Research Center, University at Buffalo, State University of New York, Buffalo, New York, USA
| | - Vincent M Tutino
- Canon Stroke & Vascular Research Center, Neurosurgery, Biomedical Engineering, Pathology and Anatomical Sciences, University at Buffalo, State University of New York, Buffalo, New York, USA
| | - Nikhil Paliwal
- Mechanical and Aerospace Engineering, Canon Stroke & Vascular Research Center, University at Buffalo, State University of New York, Buffalo, New York, USA
| | - Tatsat R Patel
- Mechanical and Aerospace Engineering, Canon Stroke & Vascular Research Center, University at Buffalo - The State University of New York, Buffalo, New York, USA
| | - Muhammad Waqas
- Neurosurgery, University at Buffalo - The State University of New York, Buffalo, New York, USA
| | - Elad I Levy
- Neurosurgery, University at Buffalo - The State University of New York, Buffalo, New York, USA
| | - Jason M Davies
- Neurosurgery, University at Buffalo - The State University of New York, Buffalo, New York, USA
| | - Adnan H Siddiqui
- Canon Stroke & Vascular Research Center, Neurosurgery, University at Buffalo, State University of New York, Buffalo, New York, USA
| | - Hui Meng
- Mechanical and Aerospace Engineering, Canon Stroke & Vascular Research Center, Neurosurgery, Biomedical Engineering, University at Buffalo - The State University of New York, Buffalo, New York, USA
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Peng F, Feng X, Tong X, Zhang B, Wang L, Guo E, Qi P, Lu J, Wu Z, Wang D, Liu A. Endovascular Treatment of Small Ruptured Intracranial Aneurysms (<5 mm) : Long-term Clinical and Angiographic Outcomes and Related Predictors. Clin Neuroradiol 2019; 30:817-826. [PMID: 31696281 PMCID: PMC7728636 DOI: 10.1007/s00062-019-00835-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 08/23/2019] [Indexed: 11/28/2022]
Abstract
Purpose To investigate the long-term clinical and angiographic outcomes and their related predictors in endovascular treatment (EVT) of small (<5 mm) ruptured intracranial aneurysms (SRA). Methods The study retrospectively reviewed patients with SRAs who underwent EVT between September 2011 and December 2016 in two Chinese stroke centers. Medical charts and telephone call follow-up were used to identify the overall unfavorable clinical outcomes (OUCO, modified Rankin score ≤2) and any recanalization or retreatment. The independent predictors of OUCO and recanalization were studied using univariate and multivariate analyses. Multivariate Cox proportional hazards models were used to identify the predictors of retreatment. Results In this study 272 SRAs were included with a median follow-up period of 5.0 years (interquartile range 3.5–6.5 years) and 231 patients with over 1171 aneurysm-years were contacted. Among these, OUCO, recanalization, and retreatment occurred in 20 (7.4%), 24 (12.8%), and 11 (7.1%) patients, respectively. Aneurysms accompanied by parent vessel stenosis (AAPVS), high Hunt-Hess grade, high Fisher grade, and intraoperative thrombogenesis in the parent artery (ITPA) were the independent predictors of OUCO. A wide neck was found to be a predictor of recanalization. The 11 retreatments included 1 case of surgical clipping, 6 cases of coiling, and 4 cases of stent-assisted coiling. A wide neck and AAPVS were the related predictors. Conclusion The present study demonstrated relatively favorable clinical and angiographic outcomes in EVT of SRAs in long-term follow-up of up to 5 years. THE AAPVS, as a morphological indicator of the parent artery for both OUCO and retreatment, needs further validation.
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Affiliation(s)
- Fei Peng
- Beijing Neurosurgical Institute, Capital Medical University, 100070, Beijing, China.,Department of Interventional Neuroradiology, Beijing Tiantan Hospital, Capital Medical University, 100070, Beijing, China.,China National Clinical Research Center for Neurological Diseases, No. 119, South 4th Ring West Road, Fengtai District, 100070, Beijing, China
| | - Xin Feng
- Department of Neurosurgery, Beijing Hospital, National Center of Gerontology, No. 1 DaHua Road, Dong Dan, 100730, Beijing, China.,Graduate School of Peking Union Medical College, No. 9 Dongdansantiao, Dongcheng District, 100730, Beijing, China
| | - Xin Tong
- Beijing Neurosurgical Institute, Capital Medical University, 100070, Beijing, China.,Department of Interventional Neuroradiology, Beijing Tiantan Hospital, Capital Medical University, 100070, Beijing, China.,China National Clinical Research Center for Neurological Diseases, No. 119, South 4th Ring West Road, Fengtai District, 100070, Beijing, China
| | - Baorui Zhang
- Beijing Neurosurgical Institute, Capital Medical University, 100070, Beijing, China.,Department of Interventional Neuroradiology, Beijing Tiantan Hospital, Capital Medical University, 100070, Beijing, China.,China National Clinical Research Center for Neurological Diseases, No. 119, South 4th Ring West Road, Fengtai District, 100070, Beijing, China
| | - Luyao Wang
- Beijing Neurosurgical Institute, Capital Medical University, 100070, Beijing, China.,Department of Interventional Neuroradiology, Beijing Tiantan Hospital, Capital Medical University, 100070, Beijing, China.,China National Clinical Research Center for Neurological Diseases, No. 119, South 4th Ring West Road, Fengtai District, 100070, Beijing, China
| | - Erkang Guo
- Beijing Neurosurgical Institute, Capital Medical University, 100070, Beijing, China.,Department of Interventional Neuroradiology, Beijing Tiantan Hospital, Capital Medical University, 100070, Beijing, China.,China National Clinical Research Center for Neurological Diseases, No. 119, South 4th Ring West Road, Fengtai District, 100070, Beijing, China
| | - Peng Qi
- Department of Neurosurgery, Beijing Hospital, National Center of Gerontology, No. 1 DaHua Road, Dong Dan, 100730, Beijing, China
| | - Jun Lu
- Department of Neurosurgery, Beijing Hospital, National Center of Gerontology, No. 1 DaHua Road, Dong Dan, 100730, Beijing, China
| | - Zhongxue Wu
- Beijing Neurosurgical Institute, Capital Medical University, 100070, Beijing, China.,Department of Interventional Neuroradiology, Beijing Tiantan Hospital, Capital Medical University, 100070, Beijing, China
| | - Daming Wang
- Department of Neurosurgery, Beijing Hospital, National Center of Gerontology, No. 1 DaHua Road, Dong Dan, 100730, Beijing, China. .,Graduate School of Peking Union Medical College, No. 9 Dongdansantiao, Dongcheng District, 100730, Beijing, China.
| | - Aihua Liu
- Beijing Neurosurgical Institute, Capital Medical University, 100070, Beijing, China. .,Department of Interventional Neuroradiology, Beijing Tiantan Hospital, Capital Medical University, 100070, Beijing, China. .,China National Clinical Research Center for Neurological Diseases, No. 119, South 4th Ring West Road, Fengtai District, 100070, Beijing, China.
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Lee SH, Cho YD, Mun JH, Yoo DH, Yeon EK, Kang HS, Kim JE, Cho WS, Han MH. Does Systemic Hypertension Impact Recanalization of Coiled Aneurysms? Clin Neuroradiol 2019; 31:117-124. [PMID: 31468079 DOI: 10.1007/s00062-019-00830-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Accepted: 08/10/2019] [Indexed: 11/29/2022]
Abstract
PURPOSE It is well known that hypertension is a significant factor in the formation, growth, and rupture of aneurysms and recanalization of coiled aneurysms is affected by hemodynamic stress. At present, however, the impact of hypertension on recanalization of coiled aneurysms has not been adequately investigated. This study examined the relation between hypertension and subsequent outcomes of coiled aneurysms, using a matched patient analysis. METHODS A total of 715 subjects undergoing coil embolization of intracranial aneurysms between 2011 and 2013 were selected for study. Time-of-flight magnetic resonance or conventional angiography was used (singly or together) to gauge degrees of occlusion after coiling, applying the Raymond classification in grading recanalization. Patients with hypertension were grouped as controlled or uncontrolled, based on blood pressure readings at outpatient clinics. Hypertensive and non-hypertensive subjects were matched (1:1) for several relevant variables. RESULTS Overall, 484 patients (67.7%) were hypertensive (controlled 338; uncontrolled 146). During the follow-up period (28.6 ± 9.7 months), 129 aneurysms (18.0%) displayed recanalization (minor 58; major 71). Patient age, concomitant diabetes, hyperlipidemia, aneurysm size, neck size, depth-to-neck ratio, and aneurysm type differed significantly in hypertensive and non-hypertensive groups; however, group incidences of cumulative recanalization were similar (p = 0.297). After 1:1 matching the cumulative recanalization rate (13.5%) in hypertensive and non-hypertensive counterparts (14.3%) again proved similar (p = 0.578). In the hypertensive group, in addition, recanalization showed no relation to controlled and uncontrolled subgroup (odds ratio, OR = 1.000, p > 0.999). CONCLUSION Unlike other aspects of evolving aneurysms (e.g. formation, growth, or rupture), recanalization of coiled aneurysms seems to be unaffected by systemic hypertension.
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Affiliation(s)
- Su Hwan Lee
- Department of Neurosurgery, Dongguk University Ilsan Hospital, Dongguk University College of Medicine, Goyang, Korea (Republic of)
| | - Young Dae Cho
- Department of Radiology, Seoul National University Hospital, Seoul National University College of Medicine, 101 Daehak-ro, 110-744, Seoul, Korea (Republic of).
| | - Jong Hyeon Mun
- Department of Neurosurgery, Kwangju Christian Hospital, Gwangju, Korea (Republic of)
| | - Dong Hyun Yoo
- Department of Radiology, Seoul National University Hospital, Seoul National University College of Medicine, 101 Daehak-ro, 110-744, Seoul, Korea (Republic of)
| | - Eung Koo Yeon
- Department of Radiology, KyungHee University Medical Center, KyungHee University College of Medicine, Seoul, Korea (Republic of)
| | - Hyun-Seung Kang
- Department of Neurosurgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea (Republic of)
| | - Jeong Eun Kim
- Department of Neurosurgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea (Republic of)
| | - Won-Sang Cho
- Department of Neurosurgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea (Republic of)
| | - Moon Hee Han
- Department of Radiology, Veterans Health Service Medical Center, Seoul, Korea (Republic of)
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Choi HH, Lee SH, Yeon EK, Yoo DH, Cho YD, Cho WS, Kim JE, Son YJ, Han MH, Kang HS. Determination of Aneurysm Volume Critical for Stability After Coil Embolization: A Retrospective Study of 3530 Aneurysms. World Neurosurg 2019; 132:e766-e774. [PMID: 31415892 DOI: 10.1016/j.wneu.2019.08.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 08/02/2019] [Accepted: 08/03/2019] [Indexed: 11/16/2022]
Abstract
BACKGROUND Recurrence is one of the concerns even after successful endovascular treatment of intracranial aneurysms. We sought to determine the critical aneurysm volume and risk factors related to aneurysmal stability in patients undergoing coil embolization of intracranial aneurysms. METHODS Aneurysm volume and follow-up imaging data were retrieved in 3042 patients with 3530 aneurysms who were treated with endovascular coil embolization from January 2006 to October 2016. We analyzed the anatomic outcome in relation to aneurysm volume and determined the critical aneurysm volume favoring coil embolization. RESULTS Recanalization rates were 2.8%, 6.3%, 19.4%, and 67.4% in each group with aneurysm volume of <10, 10-100, 100-1000, and >1000 mm3, respectively. When we investigated the 100-1000 mm3 group, the recanalization rate remarkably increased at 500 mm3 (16.4% vs. 57.5%, P < 0.0001; odds ratio [OR], 6.968; 95% confidence interval [CI], 3.562-13.631). In the entire cohort, recanalization rates were significantly different between aneurysm volume of <500 and >500 mm3 (7.2% vs. 62.9%, respectively; P < 0.0001; OR, 21.848; 95% CI, 13.944-34.235). In aneurysm volumes of >500 mm3, the location was a significant prognostic factor for long-term stability (posterior circulation vs. anterior circulation; OR, 4.737; 95% CI, 1.275-17.602; P = 0.020). CONCLUSIONS In our series of cerebral aneurysms treated with coil embolization, 500 mm3 was found to be the critical volume determining stability after coil embolization. Large volume aneurysms in the posterior circulation were especially prone to recanalization after coiling.
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Affiliation(s)
- Hyun Ho Choi
- Department of Neurosurgery, Chung-Ang University Hospital, Chung-Ang University College of Medicine, Seoul, Korea
| | - Su Hwan Lee
- Department of Neurosurgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Eung Koo Yeon
- Department of Radiology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Dong Hyun Yoo
- Department of Radiology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Young Dae Cho
- Department of Radiology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Won-Sang Cho
- Department of Neurosurgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Jeong Eun Kim
- Department of Neurosurgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Young-Je Son
- Department of Neurosurgery, Seoul Metropolitan Government Seoul National University Boramae Medical Center, Seoul National University College of Medicine, Seoul, Korea
| | - Moon Hee Han
- Department of Neurosurgery, Korea Veterans Hospital Medical Center, Seoul, Korea
| | - Hyun-Seung Kang
- Department of Neurosurgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea.
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Li W, Wang Y, Zhang Y, Wang K, Zhang Y, Tian Z, Yang X, Liu J. Efficacy of LVIS vs. Enterprise Stent for Endovascular Treatment of Medium-Sized Intracranial Aneurysms: A Hemodynamic Comparison Study. Front Neurol 2019; 10:522. [PMID: 31191428 PMCID: PMC6546800 DOI: 10.3389/fneur.2019.00522] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Accepted: 05/01/2019] [Indexed: 11/23/2022] Open
Abstract
Background: We conducted a computational fluid dynamics (CFD) study and compared the treatment of medium-sized intracranial aneurysms with LVIS and Enterprise stent-assisted coil embolization (SACE) to determine the effects of hemodynamic changes caused by different stent and coil packing densities (PDs) in endovascular treatment. Methods: We enrolled 87 consecutive patients, with 87 medium-sized intracranial aneurysms (≥7, ≤ 12 mm), who underwent LVIS or Enterprise SACE. Aneurysms treated with LVIS SACE were allocated to the LVIS group, and the remainder were allocated to the Enterprise group. CFD were performed to assess hemodynamic alterations between before treatment, after stent deployment, and after SACE. Results: One aneurysm recanalized in the LVIS group (n = 42), and five recanalized in the Enterprise group (n = 45) (recanalization rate: 2.4 vs. 11.1%, respectively; P = 0.108). Higher complete obliteration rate (P = 0.069) was found in the LVIS group. Velocity at the neck plane showed a greater reduction ratio than velocity and WSS of the aneurysm in both groups after stent deployment, while velocity and WSS of the aneurysm showed a greater reduction ratio after coil placement. Further, there was a greater reduction in velocity at the neck plane (59.52 vs. 39.81%), aneurysmal velocity (88.46 vs. 69.45%), and wall shear stress (WSS) (85.45 vs. 69.49%) on the aneurysm in the LVIS group (P < 0.001 for all). Specifically, the reduction ratio of velocity at the neck plane showed significant difference between the groups in the multivariate analysis (P = 0.013). Conclusions : LVIS SACE showed a lower recanalization for endovascular treatment of medium-sized intracranial aneurysms, and the greater hemodynamic alterations might be the key factors.
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Affiliation(s)
- Wenqiang Li
- Department of Interventional Neuroradiology, Beijing Neurosurgical Institute and Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Yang Wang
- Department of Neurosurgery, The First Affiliated Hospital of Nanchang University, Nanchang University, Nanchang, China
| | - Yisen Zhang
- Department of Interventional Neuroradiology, Beijing Neurosurgical Institute and Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Kun Wang
- Department of Interventional Neuroradiology, Beijing Neurosurgical Institute and Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Ying Zhang
- Department of Interventional Neuroradiology, Beijing Neurosurgical Institute and Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Zhongbin Tian
- Department of Interventional Neuroradiology, Beijing Neurosurgical Institute and Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Xinjian Yang
- Department of Interventional Neuroradiology, Beijing Neurosurgical Institute and Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Jian Liu
- Department of Interventional Neuroradiology, Beijing Neurosurgical Institute and Beijing Tiantan Hospital, Capital Medical University, Beijing, China
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Risk factors for recurrence and retreatment after endovascular treatment of intracranial saccular aneurysm larger than 8 mm. Acta Neurochir (Wien) 2019; 161:939-946. [PMID: 30903289 DOI: 10.1007/s00701-019-03877-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Accepted: 03/09/2019] [Indexed: 02/06/2023]
Abstract
BACKGROUND Large intracranial aneurysm is challenging for both surgical and endovascular treatment. High recurrence and retreatment rates are still limitations for endovascular treatment. Analysing risk factors of recurrence after endovascular treatment can be useful for planning future treatment strategies. METHOD We retrospectively reviewed patients with intracranial saccular aneurysm (≥ 8 mm) who underwent endovascular treatment from 2008 to 2017 at our institution. The demographic features, clinical information and angiographic results were analysed to reveal the risk factors for recurrence and retreatment. Subgroup analysis was performed according to packing density (PD) and stent insertion status. RESULTS The total recurrence and retreatment rates were 25.7% (44/171) and 10.5% (18/171), respectively. Independent risk factors for recurrence after endovascular treatment were larger aneurysm size (OR 1.32; 95% CI 1.17-1.51; p < 0.001), ruptured status (OR 3.91; 95%CI 1.44-10.90; p = 0.008), initial incomplete occlusion (OR 2.72; 95%CI 1.18-6.41; p = 0.020), and low dome-to-neck ratio (OR 0.61; 95%CI 0.36-0.97; p = 0.047). The recurrence rate for the no-stent with low PD (< 17.5%) group was 50% (14/28); 37.5% (6/16) for stent-assisted coil (SAC) with low PD group, 22.0% (20/91) for no-stent with high PD group and 11.1% (4/36) for SAC with high PD group. CONCLUSION The independent risk factors for recurrence after endovascular treatment in large (≥ 8 mm) intracranial saccular aneurysm were larger aneurysm size, ruptured status, low dome-to-neck ratio and initial incomplete occlusion state. SAC is a useful method for lowering recurrence after endovascular treatment for relatively large (≥ 8 mm) cerebral aneurysm.
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Sheng B, Wu D, Yuan J, Xu S, Li Z, Dong J, Lai N, Fang X. Hemodynamic Characteristics Associated With Paraclinoid Aneurysm Recurrence in Patients After Embolization. Front Neurol 2019; 10:429. [PMID: 31105640 PMCID: PMC6494928 DOI: 10.3389/fneur.2019.00429] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Accepted: 04/08/2019] [Indexed: 12/18/2022] Open
Abstract
Objective: To investigate the hemodynamic features before and after embolization of paraclinoidal aneurysms using hemodynamic numerical simulation and the influence of embolization on recurrence after embolization. Methods: From January 2016 to December 2017, we enrolled a total of 113 paraclinoidal aneurysms treated with embolization. They were divided into recurrent group and stable group depending on follow-up results. An aneurysm model was generated based on 3D-DSA before and after embolization. The hemodynamic characteristics were analyzed between two groups using Computational fluid dynamic (CFD). Results: In the recurrent group, the peak systolic WSS, OSI and velocity around the aneurysm neck areas prior to embolization were 20.47 ± 3.04 Pa, 0.06 ± 0.02 and 0.07 ± 0.03 m/s, respectively. These values were 23.50 ± 4.11 Pa, 0.06 ± 0.01 and 0.11 ± 0.02 m/s, respectively in the stable group (P > 0.05). The WSS, OSI, velocity around the same areas in the recurrent group after embolization were 35.59 ± 8.75 Pa, 0.07 ± 0.02 and 0.12 ± 0.03 m/s, respectively (P < 0.01). In the stable group, the WSS, OSI and velocity were 13.08 ± 2.89 Pa, 0.04 ± 0.01 and 0.07 ± 0.02 m/s, respectively (P < 0.01). After embolization, the WSS, OSI and velocity around the aneurysm neck areas in the recurrent group were significantly higher than those in the stable group. Conclusions: High peak systolic WSS, OSI and velocity around aneurysm neck areas after embolization of paraclinoidal aneurysms may be important factors leading to recurrence.
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Affiliation(s)
- Bin Sheng
- Department of Neurosurgery, The First Affiliated Hospital of Wannan Medical College, Wuhu, China
| | - Degang Wu
- Department of Neurosurgery, The First Affiliated Hospital of Wannan Medical College, Wuhu, China
| | - Jinlong Yuan
- Department of Neurosurgery, The First Affiliated Hospital of Wannan Medical College, Wuhu, China
| | - Shanshui Xu
- Department of Neurosurgery, The First Affiliated Hospital of Wannan Medical College, Wuhu, China
| | - Zhenbao Li
- Department of Neurosurgery, The First Affiliated Hospital of Wannan Medical College, Wuhu, China
| | - Jin Dong
- Department of Nursing, The First Affiliated Hospital of Wannan Medical College, Wuhu, China
| | - Niansheng Lai
- Department of Neurosurgery, The First Affiliated Hospital of Wannan Medical College, Wuhu, China
| | - Xinggen Fang
- Department of Neurosurgery, The First Affiliated Hospital of Wannan Medical College, Wuhu, China
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Funakoshi Y, Imamura H, Tani S, Adachi H, Fukumitsu R, Sunohara T, Omura Y, Matsui Y, Sasaki N, Fukuda T, Akiyama R, Horiuchi K, Kajiura S, Shigeyasu M, Sakai N. Progressive thrombosis of unruptured aneurysms after coil embolization: analysis of 255 consecutive aneurysms. J Neurointerv Surg 2019; 11:1113-1117. [DOI: 10.1136/neurintsurg-2019-014775] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Revised: 03/18/2019] [Accepted: 03/19/2019] [Indexed: 11/04/2022]
Abstract
IntroductionWe have observed that aneurysms treated by insufficient coil embolization and filled with contrast agent immediately after the procedure are often completely occluded at follow-up. However, there are limited studies showing progressive thrombosis of aneurysms after coil embolization. Herein, we describe our experience with coil embolization for aneurysms, and discuss the factors involved in progressive thrombosis.MethodsA total of 255 aneurysms treated by coil embolization in our institute between January 2011 and June 2017 and observed >6 months were included. ‘Progressive thrombosis’ indicated that aneurysms that were neck remnant (NR) or dome filling (DF) immediately after coil embolization changed to complete obliteration (CO) at the 6-month follow-up digital subtraction angiography. The factors involved in progressive thrombosis were assessed.ResultsIn all aneurysms (n=255), 24 (9.4%) were CO, 82 (32.2%) were NR, and 149 (58.4%) were DF immediately after the procedure. At 6-month digital subtraction angiography, 123 (48.2%) were CO, 95 (37.3%) were NR, and 37 (14.5%) were DF. Retreatment for major recanalization was performed in eight cases (3.1%). One hundred and three aneurysms showed progressive thrombosis. There were significant differences in aneurysm location (P=0.0002), aneurysm dome diameter (P=0.0015), aneurysm neck diameter (P=0.0068), volume embolization ratio (P=0.0054), and endovascular procedure with stent (P=0.0264) between the progressive thrombosis and no thrombosis groups.ConclusionsProgressive thrombosis can occur in aneurysms after coil embolization depending on aneurysm location and size, and stent use. Thus, the degree of coil embolization and combination with a stent should be adjusted depending on aneurysm type.
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Rupture of a previously thrombosed hepatic artery aneurysm. J Vasc Surg 2019; 70:2033-2035. [PMID: 30922753 DOI: 10.1016/j.jvs.2018.09.067] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Accepted: 09/27/2018] [Indexed: 11/20/2022]
Abstract
Hepatic artery aneurysm (HAA) is a rare form of visceral artery aneurysm. Historically, most HAAs were ruptured at presentation, but advances in imaging have led to an increase in the diagnosis of asymptomatic HAAs. Description of the natural history of patent HAAs has been difficult because of their rarity, even more so for less common thrombosed HAAs. We report the case of a 74-year-old man who experienced the rupture of a previously thrombosed HAA. He was successfully surgically treated with ligation of the aneurysm. Our case provides insight into the progression and management of thrombosed HAAs.
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Schönfeld MH, Forkert ND, Fiehler J, Cho YD, Han MH, Kang HS, Peach TW, Byrne JV. Hemodynamic Differences Between Recurrent and Nonrecurrent Intracranial Aneurysms: Fluid Dynamics Simulations Based on MR Angiography. J Neuroimaging 2019; 29:447-453. [PMID: 30891876 DOI: 10.1111/jon.12612] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 03/05/2019] [Accepted: 03/06/2019] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND AND PURPOSE Although the role of wall shear stress (WSS) in the initiation, growth, and rupture of intracranial aneurysms has been well studied, its influence on aneurysm recurrence after endovascular treatment requires further investigation. We aimed to compare WSS at necks of recurrent and nonrecurrent aneurysms. METHODS Nine recurrent coil-embolized aneurysms were identified and matched with nine nonrecurrent aneurysms. Patient-specific vessel geometries reconstructed from follow-up 3-D time-of-flight magnetic resonance angiography were analyzed using computational fluid dynamics (CFD) simulations. Absolute WSS and the percentage of abnormally low and high WSS at the aneurysm neck compared to the near artery were measured. RESULTS The median percentage of abnormal WSS at the aneurysm neck was 49.3% for recurrent and 34.7% for nonrecurrent aneurysms (P = .011). The area under the receiver-operating-characteristic curve for distinguishing these aneurysms according to the percentage of abnormal WSS was .86 (95% CI .62 to .98). The optimal cut-off value of 45.1% resulted in a sensitivity and a specificity of 88.89% (95% CI 51.8% to 99.7%). CONCLUSION Our findings indicate that necks of recurrent aneurysms are exposed to abnormal WSS to a larger extent. Abnormal WSS may serve as a metric to distinguish them from nonrecurrent aneurysms with CFD simulations a priori.
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Affiliation(s)
- Michael Hinrich Schönfeld
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Nils Daniel Forkert
- Department of Radiology and Hotchkiss Brain Institute, University of Calgary, Calgary, Canada
| | - Jens Fiehler
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Young Dae Cho
- Department of Radiology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Moon Hee Han
- Department of Radiology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Hyun-Seung Kang
- Department of Neurosurgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Thomas William Peach
- Department of Mechanical Engineering, University College London, London, UK.,Institute of Biomedical Engineering, Department of Engineering Science, University of Oxford, Oxford, UK
| | - James Vincent Byrne
- Oxford Neurovascular & Neuroradiology Research Unit, Oxford Radcliffe Hospital, Oxford, UK
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