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Vellaparambil R, Han WS, Di Giovanni P, Avril S. Computational Comparison of the Mechanical Behavior of Aortic Stent-Grafts Derived from Auxetic Unit Cells. Cardiovasc Eng Technol 2024; 15:199-210. [PMID: 38110763 PMCID: PMC11149442 DOI: 10.1007/s13239-023-00706-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 12/05/2023] [Indexed: 12/20/2023]
Abstract
PURPOSE Inappropriate stent-graft (SG) flexibility has been frequently associated with endovascular aortic repair (EVAR) complications such as endoleaks, kinks, and SG migration, especially in tortuous arteries. Stents derived from auxetic unit cells have shown some potential to address these issues as they offer an optimum trade-off between radial stiffness and bending flexibility. METHODS In this study, we utilized an established finite element (FE)-based approach to replicate the mechanical response of a SG iliac limb derived from auxetic unit cells in a virtual tortuous iliac aneurysm using a combination of a 180° U-bend and intraluminal pressurization. This study aimed to compare the mechanical performance (flexibility and durability) of SG limbs derived from auxetic unit cells and two commercial SG limbs (Z-stented SG and circular-stented SG models) in a virtual tortuous iliac aneurysm. Maximal graft strain and maximum stress in stents were employed as criteria to estimate the durability of SGs, whereas the maximal luminal reduction rate and the bending stiffness were used to assess the flexibility of the SGs. RESULTS SG limbs derived from auxetic unit cells demonstrated low luminal reduction (range 4-12%) with no kink, in contrast to Z-stented SG, which had a kink in its central area alongside a high luminal reduction (44%). CONCLUSIONS SG limbs derived from auxetic unit cells show great promise for EVAR applications even at high angulations such as 180°, with acceptable levels of durability and flexibility.
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Affiliation(s)
- Rahul Vellaparambil
- Mines Saint-Etienne, Université Jean Monnet Saint-Etienne, INSERM, SAINBIOSE U1059, 42023, Saint-Etienne, France
- Research and Development Department, HSL S.R.L, Trento, Italy
| | - Woo-Suck Han
- Mines Saint-Etienne, Université Jean Monnet Saint-Etienne, INSERM, SAINBIOSE U1059, 42023, Saint-Etienne, France
| | | | - Stéphane Avril
- Mines Saint-Etienne, Université Jean Monnet Saint-Etienne, INSERM, SAINBIOSE U1059, 42023, Saint-Etienne, France.
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Wanhainen A, Van Herzeele I, Bastos Goncalves F, Bellmunt Montoya S, Berard X, Boyle JR, D'Oria M, Prendes CF, Karkos CD, Kazimierczak A, Koelemay MJW, Kölbel T, Mani K, Melissano G, Powell JT, Trimarchi S, Tsilimparis N, Antoniou GA, Björck M, Coscas R, Dias NV, Kolh P, Lepidi S, Mees BME, Resch TA, Ricco JB, Tulamo R, Twine CP, Branzan D, Cheng SWK, Dalman RL, Dick F, Golledge J, Haulon S, van Herwaarden JA, Ilic NS, Jawien A, Mastracci TM, Oderich GS, Verzini F, Yeung KK. Editor's Choice -- European Society for Vascular Surgery (ESVS) 2024 Clinical Practice Guidelines on the Management of Abdominal Aorto-Iliac Artery Aneurysms. Eur J Vasc Endovasc Surg 2024; 67:192-331. [PMID: 38307694 DOI: 10.1016/j.ejvs.2023.11.002] [Citation(s) in RCA: 119] [Impact Index Per Article: 119.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Accepted: 09/20/2023] [Indexed: 02/04/2024]
Abstract
OBJECTIVE The European Society for Vascular Surgery (ESVS) has developed clinical practice guidelines for the care of patients with aneurysms of the abdominal aorta and iliac arteries in succession to the 2011 and 2019 versions, with the aim of assisting physicians and patients in selecting the best management strategy. METHODS The guideline is based on scientific evidence completed with expert opinion on the matter. By summarising and evaluating the best available evidence, recommendations for the evaluation and treatment of patients have been formulated. The recommendations are graded according to a modified European Society of Cardiology grading system, where the strength (class) of each recommendation is graded from I to III and the letters A to C mark the level of evidence. RESULTS A total of 160 recommendations have been issued on the following topics: Service standards, including surgical volume and training; Epidemiology, diagnosis, and screening; Management of patients with small abdominal aortic aneurysm (AAA), including surveillance, cardiovascular risk reduction, and indication for repair; Elective AAA repair, including operative risk assessment, open and endovascular repair, and early complications; Ruptured and symptomatic AAA, including peri-operative management, such as permissive hypotension and use of aortic occlusion balloon, open and endovascular repair, and early complications, such as abdominal compartment syndrome and colonic ischaemia; Long term outcome and follow up after AAA repair, including graft infection, endoleaks and follow up routines; Management of complex AAA, including open and endovascular repair; Management of iliac artery aneurysm, including indication for repair and open and endovascular repair; and Miscellaneous aortic problems, including mycotic, inflammatory, and saccular aortic aneurysm. In addition, Shared decision making is being addressed, with supporting information for patients, and Unresolved issues are discussed. CONCLUSION The ESVS Clinical Practice Guidelines provide the most comprehensive, up to date, and unbiased advice to clinicians and patients on the management of abdominal aorto-iliac artery aneurysms.
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Van Gerwen A, Gallala S, Kerselaers L, Aerden D, Debing E. Stentgraft Limb Occlusion After Endovascular Aneurysm Repair: Incidence and Risk Factors. Vasc Endovascular Surg 2024; 58:34-41. [PMID: 37400356 DOI: 10.1177/15385744231186276] [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: 07/05/2023]
Abstract
INTRODUCTION Stentgraft limb occlusion (SLO) is a potential complication of endovascular aneurysm repair (EVAR). The purposes of this single centre study are to report the incidence of SLO after EVAR and to detect possible risk factors. METHODS All patients who underwent EVAR between June 2001 and February 2020 were included in this retrospective study. Demographic data, cardiovascular risk factors, aneurysm characteristics, arterial anatomy, repair strategy, systemic and stentgraft-related complications, and in-hospital and late mortality were collected. Routine follow-up included duplex examination and/or CT angiography at 3 months, 12 months and annually thereafter. Logistic regression analysis was performed to detect predictors for SLO. RESULTS A total of 221 patients (425 stentgraft limbs) were included; of whom 11 patients (5.0%) occluded. Median time to occlusion was 3.3 months and most of the patients presented ischemic signs. Two risk factors for SLO could be identified: symptomatic aneurysm (P .015, odds ratio 4.62, 95% confidence interval 1.35-15.86) and length of the infrarenal abdominal aortic aneurysm (AAA) (P .021, odds ratio 1.31, 95% confidence interval 1.04 - 1.64). CONCLUSION The incidence of SLO after EVAR is low, and most occlusions occur within the first year. Predictors for SLO are the symptomatic aneurysm and the length of the infrarenal AAA. Further research is necessary to pool all predictors and to assess the clinical impact of different follow-up strategies for high-vs low-risk patients.
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Affiliation(s)
- Anouk Van Gerwen
- Department of Vascular Surgery, Universitair Ziekenhuis Brussel, Brussel, Belgium
| | - Sarah Gallala
- Department of Vascular Surgery, Universitair Ziekenhuis Brussel, Brussel, Belgium
| | - Laura Kerselaers
- Department of Vascular Surgery, Universitair Ziekenhuis Brussel, Brussel, Belgium
| | - Dimitri Aerden
- Department of Vascular Surgery, Universitair Ziekenhuis Brussel, Brussel, Belgium
| | - Erik Debing
- Department of Vascular Surgery, Universitair Ziekenhuis Brussel, Brussel, Belgium
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Mulatti GC, Joviliano EE, Pereira AH, Fioranelli A, Pereira AA, Brito-Queiroz A, Von Ristow A, Freire LMD, Ferreira MMDV, Lourenço M, De Luccia N, Silveira PG, Yoshida RDA, Fidelis RJR, Boustany SM, de Araujo WJB, de Oliveira JCP. Brazilian Society for Angiology and Vascular Surgery guidelines on abdominal aortic aneurysm. J Vasc Bras 2023; 22:e20230040. [PMID: 38021279 PMCID: PMC10648059 DOI: 10.1590/1677-5449.202300402] [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: 03/13/2023] [Accepted: 06/15/2023] [Indexed: 12/01/2023] Open
Abstract
The Brazilian Society of Angiology and Vascular Surgery, through the Guidelines Project, presents new Abdominal Aortic Aneurysm Guidelines, on the subject of care for abdominal aortic aneurysm patients. Its development prioritized descriptive guidelines, using the EMBASE, LILACS, and PubMed databases. References include randomized controlled trials, systematic reviews, meta-analyses, and cohort studies. Quality of evidence was evaluated by a pair of coordinators, aided by the RoB 2 Cochrane tool and the Newcastle Ottawa Scale forms. The subjects include juxtarenal aneurysms, infected aneurysms, and new therapeutic techniques, especially endovascular procedures. The current version of the guidelines include important recommendations for the primary topics involving diagnosis, treatment, and follow-up for abdominal aortic aneurysm patients, providing an objective guide for medical practice, based on scientific evidence and widely available throughout Brazil.
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Affiliation(s)
- Grace Carvajal Mulatti
- Universidade de São Paulo - USP, Faculdade de Medicina, Hospital das Clínicas, São Paulo, SP, Brasil.
| | - Edwaldo Edner Joviliano
- Universidade de São Paulo - USP, Faculdade de Medicina de Ribeirão Preto - FMRP, Ribeirão Preto, SP, Brasil.
| | - Adamastor Humberto Pereira
- Universidade Federal do Rio Grande do Sul - UFRGS, Hospital de Clínicas de Porto Alegre - HCPA, Porto Alegre, RS, Brasil.
| | | | - Alexandre Araújo Pereira
- Universidade Federal do Rio Grande do Sul - UFRGS, Hospital de Clínicas de Porto Alegre - HCPA, Porto Alegre, RS, Brasil.
| | - André Brito-Queiroz
- Universidade Federal da Bahia - UFBA, Hospital Ana Nery, Salvador, BA, Brasil.
| | - Arno Von Ristow
- Pontifícia Universidade Católica do Rio de Janeiro - PUC-Rio, Rio de Janeiro, RJ, Brasil.
| | | | | | | | - Nelson De Luccia
- Universidade de São Paulo - USP, Faculdade de Medicina, São Paulo, SP, Brasil.
| | | | - Ricardo de Alvarenga Yoshida
- Universidade Estadual Paulista “Júlio de Mesquita Filho” - UNESP, Faculdade de Medicina de Botucatu, Botucatu, SP, Brasil.
| | | | - Sharbel Mahfuz Boustany
- Universidade Federal do Rio Grande do Sul - UFRGS, Hospital de Clínicas de Porto Alegre - HCPA, Porto Alegre, RS, Brasil.
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Ogino H, Iida O, Akutsu K, Chiba Y, Hayashi H, Ishibashi-Ueda H, Kaji S, Kato M, Komori K, Matsuda H, Minatoya K, Morisaki H, Ohki T, Saiki Y, Shigematsu K, Shiiya N, Shimizu H, Azuma N, Higami H, Ichihashi S, Iwahashi T, Kamiya K, Katsumata T, Kawaharada N, Kinoshita Y, Matsumoto T, Miyamoto S, Morisaki T, Morota T, Nanto K, Nishibe T, Okada K, Orihashi K, Tazaki J, Toma M, Tsukube T, Uchida K, Ueda T, Usui A, Yamanaka K, Yamauchi H, Yoshioka K, Kimura T, Miyata T, Okita Y, Ono M, Ueda Y. JCS/JSCVS/JATS/JSVS 2020 Guideline on Diagnosis and Treatment of Aortic Aneurysm and Aortic Dissection. Circ J 2023; 87:1410-1621. [PMID: 37661428 DOI: 10.1253/circj.cj-22-0794] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 09/05/2023]
Affiliation(s)
- Hitoshi Ogino
- Department of Cardiovascular Surgery, Tokyo Medical University
| | - Osamu Iida
- Cardiovascular Center, Kansai Rosai Hospital
| | - Koichi Akutsu
- Cardiovascular Medicine, Nippon Medical School Hospital
| | - Yoshiro Chiba
- Department of Cardiology, Mito Saiseikai General Hospital
| | | | | | - Shuichiro Kaji
- Department of Cardiovascular Medicine, Kansai Electric Power Hospital
| | - Masaaki Kato
- Department of Cardiovascular Surgery, Morinomiya Hospital
| | - Kimihiro Komori
- Division of Vascular and Endovascular Surgery, Department of Surgery, Nagoya University Graduate School of Medicine
| | - Hitoshi Matsuda
- Department of Cardiovascular Surgery, National Cerebral and Cardiovascular Center
| | - Kenji Minatoya
- Department of Cardiovascular Surgery, Graduate School of Medicine, Kyoto University
| | | | - Takao Ohki
- Division of Vascular Surgery, Department of Surgery, The Jikei University School of Medicine
| | - Yoshikatsu Saiki
- Division of Cardiovascular Surgery, Graduate School of Medicine, Tohoku University
| | - Kunihiro Shigematsu
- Department of Vascular Surgery, International University of Health and Welfare Mita Hospital
| | - Norihiko Shiiya
- First Department of Surgery, Hamamatsu University School of Medicine
| | | | - Nobuyoshi Azuma
- Department of Vascular Surgery, Asahikawa Medical University
| | - Hirooki Higami
- Department of Cardiology, Japanese Red Cross Otsu Hospital
| | | | - Toru Iwahashi
- Department of Cardiovascular Surgery, Tokyo Medical University
| | - Kentaro Kamiya
- Department of Cardiovascular Surgery, Tokyo Medical University
| | - Takahiro Katsumata
- Department of Thoracic and Cardiovascular Surgery, Osaka Medical College
| | - Nobuyoshi Kawaharada
- Department of Cardiovascular Surgery, Sapporo Medical University School of Medicine
| | | | - Takuya Matsumoto
- Department of Vascular Surgery, International University of Health and Welfare
| | | | - Takayuki Morisaki
- Department of General Medicine, IMSUT Hospital, the Institute of Medical Science, the University of Tokyo
| | - Tetsuro Morota
- Department of Cardiovascular Surgery, Nippon Medical School Hospital
| | | | - Toshiya Nishibe
- Department of Cardiovascular Surgery, Tokyo Medical University
| | - Kenji Okada
- Department of Surgery, Division of Cardiovascular Surgery, Kobe University Graduate School of Medicine
| | | | - Junichi Tazaki
- Department of Cardiovascular Medicine, Graduate School of Medicine, Kyoto University
| | - Masanao Toma
- Department of Cardiology, Hyogo Prefectural Amagasaki General Medical Center
| | - Takuro Tsukube
- Department of Cardiovascular Surgery, Japanese Red Cross Kobe Hospital
| | - Keiji Uchida
- Cardiovascular Center, Yokohama City University Medical Center
| | - Tatsuo Ueda
- Department of Radiology, Nippon Medical School
| | - Akihiko Usui
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine
| | - Kazuo Yamanaka
- Cardiovascular Center, Nara Prefecture General Medical Center
| | - Haruo Yamauchi
- Department of Cardiac Surgery, The University of Tokyo Hospital
| | | | - Takeshi Kimura
- Department of Cardiovascular Medicine, Graduate School of Medicine, Kyoto University
| | | | - Yutaka Okita
- Department of Surgery, Division of Cardiovascular Surgery, Kobe University Graduate School of Medicine
| | - Minoru Ono
- Department of Cardiac Surgery, Graduate School of Medicine, The University of Tokyo
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Fontanini DM, Huber M, Vecsey-Nagy M, Borzsák S, Csőre J, Sótonyi P, Csobay-Novák C. Pulsatile Changes of the Aortic Diameter May Be Irrelevant Regarding Endograft Sizing in Patients With Aortic Disease. J Endovasc Ther 2023:15266028231172368. [PMID: 37154393 DOI: 10.1177/15266028231172368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
PURPOSE Endovascular aortic repair has become the preferred elective treatment of infrarenal aortic aneurysms. Aortic pulsatility may pose problems regarding endograft sizing. The aims of this study are to determine the aortic pulsatility in patients with aortic disease and to evaluate the effect of pulsatility on the growth of aneurysms. MATERIALS AND METHODS In this retrospective study, analyses of computed tomography angiography (CTA) images of 31 patients under conservative treatment for small abdominal aortic aneurysms were performed. Reconstructions of the raw electrocardiography (ECG) gated dataset at 30% and 90% of the R-R cycle were used. After lumen segmentation, total aortic cross-sectional area was measured in diastole and systole in the following zones: Z0, Z3, Z5, Z6, Z8, and Z9. Effective diameters (EDs) were calculated from the systolic (EDsys) and diastolic (EDdia) cross-sectional areas to determine absolute (EDsys - EDdia, mm) and relative pulsatility [(EDsys - EDdia) / EDdia, %]. Diameter of the aneurysms was measured on baseline images and the last preoperative follow-up study of each patient. RESULTS A total of 806 measurements were completed, 24 pulsatility and 2 growth measurements per patient. The mean pulsatility values at each point were as follows: Z0: 0.7±0.8 mm, Z3: 1.0±0.6 mm, Z5: 1.0±0.6 mm, Z6: 0.8±0.7 mm, Z8: 0.7±1.0 mm, Z9: 0.9±0.9 mm. Follow-up time was 5.5±2.2 years during which a growth of 13.42±9.09 mm (2.54±1.55 mm yearly) was observed. No correlation was found between pulsatility values and growth rate of the aneurysms. CONCLUSION The pulsatility of the aorta is in a submillimetric range for the vast majority of patients with aortic disease, thus probably not relevant regarding endograft sizing. Pulsatility of the ascending aorta is smaller than that of the descending segment, making an additional oversize of a Z0 implantation questionable. CLINICAL IMPACT Endovascular aortic repair reqiures precise preoperative planning. Pulsatile changes of the aortic diameter may pose issues regarding endograft sizing. In our retrospective single-centre study, aortic pulsatility of patients with AAA was measured on ECG gated CTA images. Pulsatility values reached a maximum at the descending aorta, however absolute pulsatility values did not exceed 1 mm at any point along the aorta. Therefore, significance of aortic pulsatility regarding the sizing of EVAR prostheses is questionable. Correlation between pulsatility and AAA growth was not found.
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Affiliation(s)
- Daniele Mariastefano Fontanini
- Department of Interventional Radiology, Semmelweis University, Budapest, Hungary
- Semmelweis Aortic Center, Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Máté Huber
- Department of Interventional Radiology, Semmelweis University, Budapest, Hungary
| | - Milán Vecsey-Nagy
- Semmelweis Aortic Center, Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Sarolta Borzsák
- Department of Interventional Radiology, Semmelweis University, Budapest, Hungary
- Semmelweis Aortic Center, Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Judit Csőre
- Department of Interventional Radiology, Semmelweis University, Budapest, Hungary
| | - Péter Sótonyi
- Semmelweis Aortic Center, Heart and Vascular Center, Semmelweis University, Budapest, Hungary
- Department of Vascular and Endovascular Surgery, Semmelweis University, Budapest, Hungary
| | - Csaba Csobay-Novák
- Department of Interventional Radiology, Semmelweis University, Budapest, Hungary
- Semmelweis Aortic Center, Heart and Vascular Center, Semmelweis University, Budapest, Hungary
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Dalbosco M, Roesler CRDM, Silveira PG, Fancello EA. Numerical study on the effect of stent shape on suture forces in stent-grafts. J Mech Behav Biomed Mater 2020; 110:103852. [PMID: 32957178 DOI: 10.1016/j.jmbbm.2020.103852] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 04/06/2020] [Accepted: 05/05/2020] [Indexed: 10/24/2022]
Abstract
Second-generation stent-grafts (SGs) have addressed many of the mechanical problems reported for first-generation endoprostheses, such as graft tear and stent rupture; however, suture wear and detachment due to pulsatile fatigue remains an issue. Numerical studies on the mechanical behavior of these endoprostheses usually model the attachment between stents and graft as a continuous ''tie'' constraint, which does not provide information on the mechanical loads acting on individual sutures. This paper presents a suitable approach for Finite Element (FE) simulations of SGs which allows for a qualitative evaluation of the loads acting on sutures. Attachment between stents and graft is modeled as rigid beams at discrete locations of the endoprostheses, and the reaction forces on the beams are analyzed. This modeling strategy is employed for four different SG models (two Z-stented commercial models and two circular-stented models) subjected to a severe 180° U-bend, followed by intraluminal pressurization. Results show that, for all models, the majority of sutures is experiencing fluctuating forces within a cardiac cycle (between 80 and 120 mmHg), which points to pulsatile fatigue as potential failure mode. In addition, the highest loads are concentrated in kinks and, for Z-stented models, at the apexes of stents. Moreover, suture loads for circular-stented models are lower than for Z-stented models, indicating better resistance to suture detachment. All these observations are in line with experimental results published in the literature, and, therefore, the procedure herein proposed may serve as a valuable tool in the development of new SG models with better suture resistance to pulsatile wear and fatigue.
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Affiliation(s)
- Misael Dalbosco
- Department of Mechanical Engineering, Brusque University Center, SC, Brazil; GRANTE - Department of Mechanical Engineering, Federal University of Santa Catarina, Florianópolis, SC, Brazil
| | - Carlos Rodrigo de Mello Roesler
- GRANTE - Department of Mechanical Engineering, Federal University of Santa Catarina, Florianópolis, SC, Brazil; LEBm - University Hospital, Federal University of Santa Catarina, Florianópolis, SC, Brazil
| | | | - Eduardo Alberto Fancello
- GRANTE - Department of Mechanical Engineering, Federal University of Santa Catarina, Florianópolis, SC, Brazil; LEBm - University Hospital, Federal University of Santa Catarina, Florianópolis, SC, Brazil.
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8
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Belvroy VM, Romarowski RM, van Bakel TM, van Herwaarden JA, Bismuth J, Auricchio F, Moll FL, Trimarchi S. Impact of Aortic Tortuosity on Displacement Forces in Descending Thoracic Aortic Aneurysms. Eur J Vasc Endovasc Surg 2020; 59:557-564. [DOI: 10.1016/j.ejvs.2019.09.503] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 09/09/2019] [Accepted: 09/20/2019] [Indexed: 11/16/2022]
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Overeem SP, Goudeketting SR, Schuurmann RC, Heyligers JM, Verhagen HJ, Versluis M, de Vries JPP. Assessment of changes in stent graft geometry after chimney endovascular aneurysm sealing. J Vasc Surg 2019; 70:1754-1764. [DOI: 10.1016/j.jvs.2019.02.058] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Accepted: 02/19/2019] [Indexed: 11/24/2022]
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Asenbaum U, Schoder M, Schwartz E, Langs G, Baltzer P, Wolf F, Prusa AM, Loewe C, Nolz R. Stent-graft surface movement after endovascular aneurysm repair: baseline parameters for prediction, and association with migration and stent-graft-related endoleaks. Eur Radiol 2019; 29:6385-6395. [PMID: 31250169 PMCID: PMC6828830 DOI: 10.1007/s00330-019-06282-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 04/25/2019] [Accepted: 05/22/2019] [Indexed: 12/31/2022]
Abstract
OBJECTIVES To evaluate the influence of baseline parameters on the occurrence of stent-graft surface movement after endovascular aneurysm repair (EVAR) and to investigate its association with migration and stent-graft-related endoleaks (srEL). METHODS In this retrospective, cross-sectional study, three-dimensional surface models of the stent-graft, delimited by landmarks using custom-built software, were derived from the pre-discharge and last follow-up computed tomography angiography (CTA). Stent-graft surface movement in the proximal anchoring zone between these examinations was considered significant at a threshold of 9 mm. The Cox proportional hazards model was used to determine baseline variables associated with the occurrence of stent-graft surface movement. The association between migration and srEL with stent-graft surface movement was tested with the chi-square and the Fisher exact test, respectively. RESULTS Stent-graft surface movement was observed in 54 (28.9%) of 187 patients. Multivariate analysis revealed that age ([HR] 1.05; p = 0.017), proximal neck diameter ([HR] 5.07; p < 0.001), infrarenal aortic neck angulation ([HR] 1.02, p = 0.002), and proximal neck length ([HR] 0.62, p < 0.001) were significantly associated with the occurrence of stent-graft surface movement. Migration and srEL occurred in 17 (31.5%) and 5 (9.3%) patients, with and 11 (8.3%) and 2 (1.5%) without stent-graft surface movement (p < 0.001, p = 0.022). CONCLUSIONS Age, neck diameter, infrarenal neck angulation, and proximal neck length were significantly associated with the occurrence of stent-graft surface movement. Apart from possible use of adjunctive sealing systems, concerned patients may benefit from regular CTA surveillance, enabling timely diagnosis of subtle changes of stent-graft position. KEY POINTS • Stent-graft surface movement, demonstrating subtle, three-dimensional changes in stent-graft position in the proximal anchoring zone, can be derived from CTA examinations. • Age, proximal neck diameter, and infrarenal neck angulation were significantly associated with an increased incidence of stent-graft surface movement. Stent-graft surface movement is significantly more frequent in patients with stent-graft migration and stent-graft-related endoleaks. • Consideration of risk factors for stent-graft surface movement may help to identify patients who might benefit from regular CTA surveillance and timely diagnosis of subtle changes of stent-graft position, enabling re-interventions to prevent migration and srEL.
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Affiliation(s)
- Ulrika Asenbaum
- Division of Cardiovascular and Interventional Radiology, Department of Bio-medical Imaging and Image-Guided Therapy, Medical University of Vienna - Vienna General Hospital, Waehringer Guertel 18-20, A-1090, Vienna, Austria
| | - Maria Schoder
- Division of Cardiovascular and Interventional Radiology, Department of Bio-medical Imaging and Image-Guided Therapy, Medical University of Vienna - Vienna General Hospital, Waehringer Guertel 18-20, A-1090, Vienna, Austria
| | - Ernst Schwartz
- Computational and Imaging Research Laboratory, Department of Bio-medical Imaging and Image-Guided Therapy, Medical University of Vienna, Vienna, Austria
| | - Georg Langs
- Computational and Imaging Research Laboratory, Department of Bio-medical Imaging and Image-Guided Therapy, Medical University of Vienna, Vienna, Austria
| | - Pascal Baltzer
- Division of Cardiovascular and Interventional Radiology, Department of Bio-medical Imaging and Image-Guided Therapy, Medical University of Vienna - Vienna General Hospital, Waehringer Guertel 18-20, A-1090, Vienna, Austria
| | - Florian Wolf
- Division of Cardiovascular and Interventional Radiology, Department of Bio-medical Imaging and Image-Guided Therapy, Medical University of Vienna - Vienna General Hospital, Waehringer Guertel 18-20, A-1090, Vienna, Austria
| | - Alexander M Prusa
- Department of Surgery, Medical University of Vienna, Vienna, Austria
| | - Christian Loewe
- Division of Cardiovascular and Interventional Radiology, Department of Bio-medical Imaging and Image-Guided Therapy, Medical University of Vienna - Vienna General Hospital, Waehringer Guertel 18-20, A-1090, Vienna, Austria
| | - Richard Nolz
- Division of Cardiovascular and Interventional Radiology, Department of Bio-medical Imaging and Image-Guided Therapy, Medical University of Vienna - Vienna General Hospital, Waehringer Guertel 18-20, A-1090, Vienna, Austria.
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Gao Y, Miserlis D, Garg N, Pipinos I. Novel open technique for repair of endograft migration. JOURNAL OF VASCULAR SURGERY CASES INNOVATIONS AND TECHNIQUES 2019; 5:88-90. [PMID: 31193434 PMCID: PMC6529646 DOI: 10.1016/j.jvscit.2018.08.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Accepted: 08/16/2018] [Indexed: 11/16/2022]
Abstract
Widespread adoption of endovascular aneurysm repair has led to increased incidence of late complications, such as endograft migration. Treatment options have to be tailored to the patient's health, quality of proximal aorta, and extent of migration. Complete or partial endograft removal is associated with significant morbidity and mortality. We describe a case in which open repair with endograft preservation was employed, with the additional benefit of a sutured proximal anastomosis.
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Affiliation(s)
- Yue Gao
- Department of Surgery, University of Nebraska Medical Center, Omaha, Neb
| | - Dimitrios Miserlis
- Department of Surgery, University of Nebraska Medical Center, Omaha, Neb
| | - Nitin Garg
- Department of Surgery, University of Nebraska Medical Center, Omaha, Neb
| | - Iraklis Pipinos
- Department of Surgery, University of Nebraska Medical Center, Omaha, Neb.,Department of Surgery and VA Research Service, VA Nebraska-Western Iowa Health Care System, Omaha, Neb
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12
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Kapetanios D, Banafsche R, Jerkku T, Spanos K, Hoffmann U, Fiorucci B, Rantner B, Tsilimparis N. Current evidence on aortic remodeling after endovascular repair. THE JOURNAL OF CARDIOVASCULAR SURGERY 2019; 60:186-190. [PMID: 30698372 DOI: 10.23736/s0021-9509.19.10878-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Anatomical changes after endovascular repair (EVAR) of abdominal aortic aneurysms (AAAs) are thoroughly studied as they could affect the long-term postoperative outcome. The aim of the present study was to review the literature and summarize the recent data regarding the aortic remodeling and its clinical significance. A continuous aortic neck expansion is observed after EVAR and is more rapid at the first month and during the third postoperative year. This aortic neck dilation is not influenced by the type of proximal stent-graft fixation, is comparable to open surgical aneurysm repair and is most probably related with the natural progression of aneurismal disease. Aortic neck angulation reduces significantly immediately after EVAR and then continues to reduce slowly and gradually. Neck angulations ≥60° have a greater reduction compared to neck angulations <60°. An expansion of the common iliac arteries at the distal landing zone is also observed after EVAR and is more prominent in the first six postoperative months. A postoperative increase of the distance between superior mesenteric artery and iliac bifurcations (aortoiliac elongation) is described and is associated with increased type I endoleaks and reinterventions. The aneurysm sac diameter most frequently reduces after EVAR in absence of an endoleak and this aneurysm sac regression has been associated with the stent-graft type.
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Affiliation(s)
- Dimitrios Kapetanios
- Department of Vascular Surgery, Ludwig-Maximilian University Hospital, Munich, Germany -
| | - Ramin Banafsche
- Department of Vascular Surgery, Ludwig-Maximilian University Hospital, Munich, Germany
| | - Thomas Jerkku
- Department of Vascular Surgery, Ludwig-Maximilian University Hospital, Munich, Germany
| | - Konstantinos Spanos
- Department of Vascular Medicine, German Aortic Center, University Heart Center Hamburg, Hamburg, Germany
| | - Ulrich Hoffmann
- Department of Vascular Surgery, Ludwig-Maximilian University Hospital, Munich, Germany
| | - Beatrice Fiorucci
- Department of Vascular Medicine, German Aortic Center, University Heart Center Hamburg, Hamburg, Germany
| | - Barbara Rantner
- Department of Vascular Surgery, Ludwig-Maximilian University Hospital, Munich, Germany
| | - Nikolaos Tsilimparis
- Department of Vascular Medicine, German Aortic Center, University Heart Center Hamburg, Hamburg, Germany
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13
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Wanhainen A, Verzini F, Van Herzeele I, Allaire E, Bown M, Cohnert T, Dick F, van Herwaarden J, Karkos C, Koelemay M, Kölbel T, Loftus I, Mani K, Melissano G, Powell J, Szeberin Z, ESVS Guidelines Committee, de Borst GJ, Chakfe N, Debus S, Hinchliffe R, Kakkos S, Koncar I, Kolh P, Lindholt JS, de Vega M, Vermassen F, Document reviewers, Björck M, Cheng S, Dalman R, Davidovic L, Donas K, Earnshaw J, Eckstein HH, Golledge J, Haulon S, Mastracci T, Naylor R, Ricco JB, Verhagen H. Editor's Choice – European Society for Vascular Surgery (ESVS) 2019 Clinical Practice Guidelines on the Management of Abdominal Aorto-iliac Artery Aneurysms. Eur J Vasc Endovasc Surg 2019; 57:8-93. [DOI: 10.1016/j.ejvs.2018.09.020] [Citation(s) in RCA: 873] [Impact Index Per Article: 174.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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14
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van Noort K, Boersen JT, Zoethout AC, Schuurmann RCL, Heyligers JMM, Reijnen MMPJ, Zeebregts CJ, Slump CH, de Vries JPPM. Anatomical Predictors of Endoleaks or Migration After Endovascular Aneurysm Sealing. J Endovasc Ther 2018; 25:719-725. [DOI: 10.1177/1526602818808296] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Purpose: To identify preoperative anatomical aortic characteristics that predict seal failures after endovascular aneurysm sealing (EVAS) and compare the incidence of events experienced by patients treated within vs outside the instructions for use (IFU). Methods: Of 355 patients treated with the Nellix EndoVascular Aneurysm Sealing System (generation 3SQ+) at 3 high-volume centers from March 2013 to December 2015, 94 patients were excluded, leaving 261 patients (mean age 76±8 years; 229 men) for regression analysis. Of these, 83 (31.8%) suffered one or more of the following events: distal migration ⩾5 mm of one or both stent frames, any endoleak, and/or aneurysm growth >5 mm. Anatomical characteristics were determined on preoperative computed tomography (CT) scans. Patients were divided into 3 groups: treated within the original IFU (n=166), outside the original IFU (n=95), and within the 2016 revised IFU (n=46). Categorical data are presented as the median (interquartile range Q1, Q3). Results: Neck diameter was significantly larger in the any-event cohort vs the control cohort [23.7 mm (21.7, 26.3) vs 23.0 mm (20.9, 25.2) mm, p=0.022]. Neck length was significantly shorter in the any-event cohort [15.0 mm (10.0, 22.5) vs 19.0 mm (10.0, 21.8), p=0.006]. Maximum abdominal aortic aneurysm (AAA) diameter and the ratio between the maximum AAA diameter and lumen diameter in the any-event group were significantly larger than the control group (p=0.041 and p=0.002, respectively). Regression analysis showed aortic neck diameter (p=0.006), neck length (p=0.001), and the diameter ratio (p=0.011) as significant predictors of any event. In the comparison of events to IFU status, 52 (31.3%) of 166 patients in the inside the original IFU group suffered an event compared to 13 (28.3%) of 46 patients inside the 2016 IFU group (p=0.690). Conclusion: Large neck diameter, short aortic neck length, and the ratio between the maximum AAA and lumen diameters are preoperative anatomical predictors of the occurrence of migration (⩾5 mm), any endoleak, and/or aneurysm growth (>5 mm) after EVAS. Even under the refined 2016 IFU, more than a quarter of patients suffered from an event. Improvements in the device seem to be necessary before this technique can be implemented on a large scale in endovascular AAA repair.
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Affiliation(s)
- Kim van Noort
- Department of Vascular Surgery, St Antonius Hospital, Nieuwegein, the Netherlands
- MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, the Netherlands
| | - Johannes T. Boersen
- Department of Vascular Surgery, St Antonius Hospital, Nieuwegein, the Netherlands
- MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, the Netherlands
| | - Aleksandra C. Zoethout
- Department of Vascular Surgery, Rijnstate Hospital, Arnhem, the Netherlands
- Department of Surgery, Division of Vascular Surgery, University Medical Center Groningen, the Netherlands
| | - Richte C. L. Schuurmann
- Department of Vascular Surgery, St Antonius Hospital, Nieuwegein, the Netherlands
- MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, the Netherlands
| | - Jan M. M. Heyligers
- Department of Vascular Surgery, Elisabeth-TweeSteden Hospital, Tilburg, the Netherlands
| | | | - Clark J. Zeebregts
- Department of Surgery, Division of Vascular Surgery, University Medical Center Groningen, the Netherlands
| | - Cornelis H. Slump
- MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, the Netherlands
| | - Jean-Paul P. M. de Vries
- Department of Vascular Surgery, St Antonius Hospital, Nieuwegein, the Netherlands
- Department of Surgery, Division of Vascular Surgery, University Medical Center Groningen, the Netherlands
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Pillai J, Yazicioglu C, Omar M, Veller MG. Stent-Graft Relining in a Patient with Acute Aortic Aneurysm and a Completely Migrated Endograft. Braz J Cardiovasc Surg 2017; 32:545-547. [PMID: 29267621 PMCID: PMC5731306 DOI: 10.21470/1678-9741-2017-0122] [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: 06/16/2017] [Accepted: 07/27/2017] [Indexed: 11/06/2022] Open
Abstract
Stent-graft migration and type I endoleaks are associated with a higher rate of
reintervention and increased mortality and morbidity. This article describes a
patient presented with an infrarenal aortic stent-graft which had migrated into
the aortic sac with loss of all aortic neck attachment. The acutely expanding
abdominal aortic aneurysm was treated by placing a second modular endograft
within and above the migrated stentgraft. The patient returned 36 months later,
with features of an acute myocardial infarction, severe bilateral lower limb
ischemia, and renal failure. He was too ill for intervention and demised within
48 hours.
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Affiliation(s)
- Jayandiran Pillai
- Division of Vascular Surgery and Department of Surgery, University of the Witwatersrand, Johannesburg, South Africa
| | - Ceyhan Yazicioglu
- Division of Vascular Surgery and Department of Surgery, University of the Witwatersrand, Johannesburg, South Africa
| | - Mahad Omar
- Division of Vascular Surgery and Department of Surgery, University of the Witwatersrand, Johannesburg, South Africa
| | - Martin G Veller
- Division of Vascular Surgery and Department of Surgery, University of the Witwatersrand, Johannesburg, South Africa
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16
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Buck DB, Soden PA, Deery SE, Zettervall SL, Ultee KHJ, Landon BE, O'Malley AJ, Schermerhorn ML. Comparison of Endovascular Stent Grafts for Abdominal Aortic Aneurysm Repair in Medicare Beneficiaries. Ann Vasc Surg 2017; 47:31-42. [PMID: 28890065 DOI: 10.1016/j.avsg.2017.08.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Revised: 08/07/2017] [Accepted: 08/20/2017] [Indexed: 10/18/2022]
Abstract
BACKGROUND Increased renal complications have been suggested with suprarenal stent grafts, but long-term analyses have been limited. Therefore, the purpose of this study was to evaluate the effect of endograft choice on perioperative and long-term outcomes. METHODS We compared Medicare beneficiaries undergoing endovascular abdominal aortic aneurysms repair from 2005 to 2008 with endografts with infrarenal fixation and a single docking limb (AneuRx, Excluder) to those with suprarenal fixation and 2 docking limbs (Zenith), or a unibody configuration (Powerlink). Propensity score weighting accounted for differences in patient characteristics among the different graft formations, and perioperative mortality, complications, and length of stay and 4-year rates of survival, rupture, and reintervention were compared. RESULTS Forty-six thousand one hundred seventy-one Medicare beneficiaries were identified including 11,002 (24%) with suprarenal fixation, 32,909 (71%) with infrarenal fixation, and 2,260 (5%) with a unibody graft. After propensity score weighting, there were no significant differences in patients' baseline clinical and demographic characteristics. The suprarenal fixation patients had higher rates of perioperative mortality (1.7% vs. 1.3%, P < 0.01), renal failure (6.0% vs. 4.7%, P < 0.001), and mesenteric ischemia (0.7% vs. 0.4%, P < 0.01) and longer length of stay (3.4 days vs. 3.0 days, P < 0.001) compared with patients with infrarenal fixation. Unibody grafts had higher rates of renal failure (5.9% vs. 4.7%, P < 0.001), mesenteric ischemia (1.0% vs. 0.4%, P < 0.001), and conversion to open repair (0.7% vs. 0.1%, P < 0.001) compared to those with infrarenal fixation and single docking limbs. At 4 years, mortality remained slightly higher with suprarenal compared to infrarenal fixation (30% vs. 29%, P = 0.047), although these patients had fewer conversions to open repair (0.6% vs. 0.9%, P = 0.03) and aneurysm-related reinterventions (10% vs. 12%, P < 0.01). At 4 years, unibody grafts had more aneurysm-related interventions compared to infrarenal fixation grafts (15% vs. 12%, P < 0.01) but fewer conversions to open repair (0.4% vs. 0.9%, P = 0.02). Late rupture did not differ among the groups. CONCLUSIONS Compared to infrarenal fixation devices, patients who underwent EVAR with suprarenal fixation had higher perioperative mortality and renal complications but fewer reinterventions including conversion, while the unibody graft had more perioperative complications and aneurysm-related reinterventions, but fewer conversions to open repair. Although these differences could be explained by selection bias, these data suggest that further comparative effectiveness analyses should be performed to understand the outcomes following EVAR with suprarenal fixation and unibody grafts.
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Affiliation(s)
- Dominique B Buck
- Department of Vascular and Endovascular Surgery, Beth Israel Deaconess Medical Center, Boston, MA
| | - Peter A Soden
- Department of Vascular and Endovascular Surgery, Beth Israel Deaconess Medical Center, Boston, MA
| | - Sarah E Deery
- Department of Vascular and Endovascular Surgery, Beth Israel Deaconess Medical Center, Boston, MA
| | - Sara L Zettervall
- Department of Vascular and Endovascular Surgery, Beth Israel Deaconess Medical Center, Boston, MA
| | - Klaas H J Ultee
- Department of Vascular and Endovascular Surgery, Beth Israel Deaconess Medical Center, Boston, MA
| | - Bruce E Landon
- Department of Medicine, Beth Israel Deaconess Medical Center, Boston, MA; Department of Health Care Policy, Harvard Medical School, Boston, MA
| | - A James O'Malley
- Institute for Health Policy and Clinical Practice, Geisel School of Medicine at Dartmouth, Lebanon, NH
| | - Marc L Schermerhorn
- Department of Vascular and Endovascular Surgery, Beth Israel Deaconess Medical Center, Boston, MA.
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17
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Chang JK, Calligaro KD, Dougherty MJ. Initial Experience with Endovascular Aortic Aneurysm Repair Without Cardiologists or Radiologists—Do Vascular Surgeons Really Need Them? Vasc Endovascular Surg 2016; 38:413-6. [PMID: 15490037 DOI: 10.1177/153857440403800503] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Endovascular abdominal aortic aneurysm repair (EVAR) has been predominantly accomplished by teams of multidisciplinary interventionalists, frequently under the primary direction of cardiologists and radiologists. The purpose of this paper was to examine the feasibility and safety of an initial experience of EVARs performed by vascular surgeons at a single institution without other interventionalists. The authors reviewed the first 50 EVARs performed solely by vascular surgeons at our hospital, which we believed represented a fair and sizable enough learning curve for this new procedure. The operations were performed in an endovascular operating room and the surgeons had prior endovascular experience. The EVAR protocol included preoperative abdominal computed tomography (CT) scans and aortograms, same-day admissions, epidural anesthesia, transfer to the ward the day of surgery, and discharge the first postoperative day. CT scans were performed on postoperative day 1 and then annually, unless duplex ultrasound (DU) suggested an endoleak. DU was performed 1 week postoperatively, every 3 months for the first year, and then every 6 months thereafter. Of the first 23 patients, 3 required immediate conversion to open repair because of device malfunction (all in a Phase III FDA trial) and 1 underwent conversion 3 weeks after initial graft placement during treatment of a failing endograft limb as diagnosed by duplex ultrasonography. None of the next 27 cases required conversion. In 2 (4%) patients, graft limb occlusions occurred postoperatively and were treated with femorofemoral crossover grafts. There were 5 (10%) endoleaks: 2 were treated endovascularly, 1 closed spontaneously, and 2 were followed. Several advanced adjunctive endovascular procedures were performed concomitantly during EVAR including internal iliac artery coil embolization using aortic crossover catheters in 16% (8/50) of patients, proximal or distal extension cuff placement in 16% (8/50), and graft limb stenting in 50% (25/50). The average length of stay for patients who underwent uncomplicated aortic stent grafts was 1.9 days (range, 1–4 days) compared to 2.3 days for all patients (range 1–13 days). In no case were other interventionalists necessary for intraoperative assistance. These results of EVAR performed solely by vascular surgeons are comparable to reports by multidisciplinary teams and support the premise that vascular surgeons with endovascular skills have the knowledge and capability to begin performing EVAR independently of other specialists.
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Affiliation(s)
- Jeanette K Chang
- Section of Vascular Surgery, Pennsylvania Hospital, Philadelphia, PA 19106, USA
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18
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Biebl M, Hakaim AG, Oldenburg WA, Klocker J, McKinney JM, Paz-Fumagalli R. Management of a Large Intraoperative Type IIIb Endoleak in a Bifurcated Endograft. Vasc Endovascular Surg 2016; 39:267-71. [PMID: 15920656 DOI: 10.1177/153857440503900308] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The purpose of this paper is to describe the intraoperative management of a type IIIb endoleak after deployment of a bifurcated endograft in a patient with narrow iliac access vessels. A 62-year-old man underwent elective endovascular repair (EVAR) of a 53 mm abdominal aortic aneurysm. After device deployment, a large IIIb endoleak, arising from the main body of the device, was visualized. Narrow iliac vessels precluded deployment of a second bifurcated graft, and the endoleak was successfully excluded with an aortomonoiliac device, followed by contralateral iliac occlusion and subsequent creation of a femorofemoral bypass. At 1-year follow-up, the aneurysm remains excluded and is decreasing in size. Type III endoleaks are a known complication of EVAR, requiring immediate treatment through their association with aneurysm enlargement and rupture. If an additional bifurcated graft cannot be used, aortomonoiliac conversion represents a feasible endovascular alternative treatment for type III endoleaks, other than conversion to open surgical repair. Therefore, aortomonoiliac converters with appropriate occluder devices should be readily available during deployment of bifurcated devices.
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Affiliation(s)
- Matthias Biebl
- Section of Vascular Surgery, Mayo Clinic Jacksonville, FL 32224, USA
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19
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Guan Y, Wang L, Lin J, King MW. Compliance Study of Endovascular Stent Grafts Incorporated with Polyester and Polyurethane Graft Materials in both Stented and Unstented Zones. MATERIALS 2016; 9:ma9080658. [PMID: 28773781 PMCID: PMC5509269 DOI: 10.3390/ma9080658] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Revised: 07/23/2016] [Accepted: 07/26/2016] [Indexed: 11/16/2022]
Abstract
Compliance mismatch between stent graft and host artery may induce complications and blood flow disorders. However, few studies have been reported on stent graft compliance. This study aims to explore the deformation and compliance of stent graft in stented and unstented zones under three pressure ranges. Compliance of two stent grafts incorporated with polyurethane graft (nitinol-PU) and polyester graft (nitinol-PET) materials respectively were tested; the stents used in the two stent grafts were identical. For the circumferential deformation of the stent grafts under each pressure range, the nitinol-PET stent graft was uniform in both zones. The nitinol-PU stent graft was circumferentially uniform in the stented zone, however, it was nonuniform in the unstented zone. The compliance of the PU graft material was 15 times higher than that of the PET graft. No significant difference in compliance was observed between stented and unstented zones of the nitinol-PET stent graft regardless of the applied pressure range. However, for the nitinol-PU stent graft, compliance of the unstented PU region was approximately twice that of the stented region; thus, compliance along the length of the nitinol-PU stent graft was not constant and different from that of the nitinol-PET stent graft.
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Affiliation(s)
- Ying Guan
- Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, 2999 North Renmin Road, Songjiang, Shanghai 201620, China.
| | - Lu Wang
- Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, 2999 North Renmin Road, Songjiang, Shanghai 201620, China.
| | - Jing Lin
- Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, 2999 North Renmin Road, Songjiang, Shanghai 201620, China.
| | - Martin W King
- Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, 2999 North Renmin Road, Songjiang, Shanghai 201620, China.
- College of Textiles, North Carolina State University, Raleigh, NC 27695-8301, USA.
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20
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Cox DE, Jacobs DL, Motaganahalli RL, Wittgen CM, Peterson GJ. Outcomes of Endovascular AAA Repair in Patients with Hostile Neck Anatomy Using Adjunctive Balloon-Expandable Stents. Vasc Endovascular Surg 2016; 40:35-40. [PMID: 16456604 DOI: 10.1177/153857440604000105] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Hostile neck anatomy remains the predominant reason that patients are denied endovascular aneurysm repair (EVAR). We reviewed our experience of EVAR with use of prophylactic adjunctive proximal balloon-expandable stents in patients with hostile neck anatomy and adjunctive proximal balloon-expandable stents in patients with type I endoleaks. Of 140 patients who underwent EVAR between 2000 and 2004, we reviewed data for 19 patients in whom we used proximal balloon-expandable stents. By high-resolution computed tomography scan or angiography, hostile neck anatomy was classified as length <15 mm, neck diameters = 26 mm, circumferential thrombus at the proximal neck, angulated neck =60 degrees, and neck bulge or reverse taper necks. Patients were considered to have hostile anatomy if they met 1 or more of the above-cited criteria. All patients underwent AAA repair with commercially available endograft systems, Zenith (Cook, Bloomington, IN) and AneuRx (Medtronic/AVE, Minneapolis, MN). Balloon-expandable stents utilized included Cordis-Palmaz stents (17/19) and eV3 Max stents (2/19). Stents were deployed in the proximal graft with transrenal extension. AneuRx (18/19) and Zenith (1/19) endografts were used in all of the patients. Of the 19 patients, 15 had prophylactic stent placement for known hostile neck anatomy and 4 patients had stent placement for type I endoleak. Assisted primary technical success was achieved in all patients. Three patients had maldeployment of the endograft or proximal stent requiring additional endovascular interventions at the time of surgery. No endografts were deployed too low requiring stent placement. Procedure-related complications occurred in 2 of 19 patients. These included 1 operative death secondary to pneumonia and 1 patient who developed progressive renal failure. Short-term clinical success was achieved in 17 of 19 patients. Two patients required secondary interventions, 1 due to device migration with secondary conversion to open repair, and an endoleak, which, on angiogram, was a large type II endoleak successfully treated with coiling of the inferior mesenteric artery. One patient was observed to have a type II endoleak with no associated aneurysm enlargement. Short-term results suggest the use of prophylactic adjunctive balloon-expandable stents may decrease the incidence of secondary interventions related to hostile neck anatomy when used as an adjunctive measure with EVAR. Based on our experience, we feel EVAR may be offered to an expanded patient population with hostile neck anatomy with use of prophylactic balloon-expandable stents.
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Affiliation(s)
- Daniel E Cox
- Division of Vascular Surgery, St. Louis University School of Medicine, MO 63110, USA
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21
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Dillavou ED, Muluk S, Makaroun MS. Is Neck Dilatation After Endovascular Aneurysm Repair Graft Dependent? Vasc Endovascular Surg 2016; 39:47-54. [PMID: 15696248 DOI: 10.1177/153857440503900105] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Long-term success of endovascular aneurysm repair (EVAR) relies on a stable proximal neck. The authors' goal was to determine whether neck dilatation after EVAR varies among 4 different endografts and whether it is related to complications of the proximal neck. Core laboratory data from 4 phase II trials of aortic endografts were analyzed for neck diameter changes over time. Patients who had at least 24 months' follow-up were included in the analysis. Neck measurement methodology varied among the 3 core labs used. Values are reported within the parameters used by each lab. Short-axis neck diameter close to 5 mm below the renal arteries, when available, was used for longitudinal comparisons. Dilation was defined as an enlargement of 3 mm or more from the first postoperative scan to the last available follow-up for each patient. Graft migration and late proximal endoleaks were determined by the individual core labs. A limited number of Lifepath grafts had most recent follow-up measurements performed by the authors. Results were compared by using Student's t test, chi-square analysis, and the Pearson correlation coefficient. Postoperative measurements from 729 EVAR patients were examined. Follow-up ranged from 24 to 60 months for 229 Ancure (Guidant) and 258 AneuRx (Medtronic) patients, and from 24 to 36 months for 211 Excluder (Gore) and 31 first-generation Lifepath (Edwards) patients. Neck dilation was noted in 124 patients (17.0%) and did not differ significantly among graft types. The incidences of late proximal endoleaks were similar among graft types, but rates of migration differed (p= 0.01). Dilation was associated with migration in Ancure (p=0.03) and Excluder (p=0.02) grafts. Late proximal endoleaks were seen in 4.1% of patients with and in 0.7% of patients without dilation (p=0.001). Patients with initial neck diameter >25 mm had significantly less dilatation than those with smaller necks (p<0.001). The incidence of neck dilation approached 20% in all EVAR patients after 24 months and was not significantly different among graft types. Neck dilation of 3 mm or more appears to be one risk factor for migration and late proximal endoleak.
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Affiliation(s)
- Ellen D Dillavou
- Division of Vascular Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
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22
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England A, Torella F, Fisher RK, McWilliams RG. Migration of the Nellix endoprosthesis. J Vasc Surg 2016; 64:306-312. [DOI: 10.1016/j.jvs.2016.02.053] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Accepted: 02/23/2016] [Indexed: 11/15/2022]
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23
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Leurs LJ, Stultiëns G, Kievit J, Buth J. Adverse Events at the Aneurysmal Neck Identified at Follow-Up after Endovascular Abdominal Aortic Aneursym Repair: How Do They Correlate? Vascular 2016; 13:261-7. [PMID: 16288700 DOI: 10.1258/rsmvasc.13.5.261] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The objective of this study was to assess the prevalence of and the correlation between dilatation of the infrarenal neck and proximal device migration after endovascular abdominal aortic aneurysm repair (EVAR). The analysis made use of the EUROSTAR registry. Between 1994 and 2004, 4,233 patients with an abdominal aortic aneurysm larger than 4 cm underwent EVAR. Only patients with available follow-up data regarding neck size and device position were included in this assessment. Chi-square and t-tests or Wilcoxon rank sum tests were used for comparison of discrete and continuous variables, respectively. Time-dependent variables were evaluated by log-rank tests. In addition, multivariate analysis was performed to determine anatomic and operative variables with an independent correlation with neck growth and device migration, respectively. In addition, the association with proximal endoleak was assessed. Neck dilatation and proximal migration were found in 1,342 (32%) and 192 (4.5%) of the 4,233 patients, respectively. One hundred twelve patients (2.5%) had neck dilatation and migration of the proximal device extremity. The correlation between proximal migration and neck dilatation was statistically significant ( p < .0001). Other independent variables for migration were a wider neck and aneurysmal diameter, shorter necks, proximal endoleak, and absence of suprarenal fixation. Neck dilatation was predicted by narrow necks, use of devices with suprarenal fixation, and larger device diameters. Proximal endoleak occurred in 136 (3.2%) patients and was significantly associated with shorter, angulated necks and proximal migration. The present study documented that migration may be caused by neck dilatation. However, neck dilatation was not significantly promoted by proximal migration. Other factors, such as dimensions of the neck, the device fixation system, and perhaps progressive wall degeneration, are also likely to play a role in the pathogenesis of neck dilatation. To obtain good results from EVAR, accepted criteria of neck dimensions should be adhered to.
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Biebl M, Hakaim AG, Lau LL, Oldenburg WA, Klocker J, Neuhauser B, Paz-Fumagalli R, McKinney JM, Stockland A. Use of Proximal Aortic Cuffs as an Adjunctive Procedure during Endovascular Aortic Aneurysm Repair. Vascular 2016; 13:16-22. [PMID: 15895670 DOI: 10.1258/rsmvasc.13.1.16] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The purpose of this study was to evaluate the incidence and durability of additional proximal cuffs during endovascular abdominal aortic aneurysm repair (EVAR). A retrospective review of 90 EVAR patients was conducted. Postoperative survival, proximal sealing zone–related complications, and secondary procedures were analyzed. Additional proximal cuffs were used in 11%. Their use did not affect postoperative survival ( p = .58), type I endoleak rate (4.4%; p = .19), or the need for sealing zone–related secondary procedures (6.3%; p = .38) compared with patients without cuff placement but was related to a higher cumulative graft migration rate (2.2% overall p = .02). Two patients (2.5%; p = .79) underwent conversion to open surgery, both for proximal sealing zone–related complications. Application of proximal cuffs appears to be an effective intraoperative adjunctive procedure to achieve a proximal seal during EVAR, with favorable midterm results. However, the risk of late endograft migrations may be elevated in this group.
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Affiliation(s)
- Matthias Biebl
- Section of Vascular Surgery, Mayo Clinic, Jacksonville, FL, USA
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Lahoz C, Gracia CE, García LR, Montoya SB, Hernando ÁB, Heredero ÁF, Tembra MS, Velasco MB, Guijarro C, Ruiz EB, Pintó X, de Ceniga MV, Moñux Ducajú G. [Not Available]. CLINICA E INVESTIGACION EN ARTERIOSCLEROSIS : PUBLICACION OFICIAL DE LA SOCIEDAD ESPANOLA DE ARTERIOSCLEROSIS 2016; 28 Suppl 1:1-49. [PMID: 27107212 DOI: 10.1016/s0214-9168(16)30026-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Affiliation(s)
- Carlos Lahoz
- Unidad de Lípidos y Riesgo Vascular, Servicio de Medicina Interna, Hospital Carlos III, Madrid, España.
| | - Carlos Esteban Gracia
- Servicio de Angiología y Cirugía Vascular, Hospital Universitari Germans Trias i Pujol, Badalona, Barcelona, España
| | | | - Sergi Bellmunt Montoya
- Servicio de Angiología y Cirugía Vascular, Hospital de la Santa Creu i Sant Pau, Barcelona, España
| | - Ángel Brea Hernando
- Unidad de Lípidos, Servicio de Medicina Interna, Hospital San Pedro, Logroño, España
| | | | - Manuel Suárez Tembra
- Unidad de Lípidos y Riesgo Cardiovascular, Servicio de Medicina Interna, Hospital San Rafael, A Coruña, España
| | - Marta Botas Velasco
- Servicio de Angiología y Cirugía Vascular, Hospital de Cabueñes, Gijón, España
| | - Carlos Guijarro
- Consulta de Riesgo Vascular, Unidad de Medicina Interna, Hospital Universitario Fundación Alcorcón, Alcorcón, Madrid, España
| | - Esther Bravo Ruiz
- Servicio de Angiología y Cirugía Vascular, Hospital Universitario de Basurto, Bilbao, España
| | - Xavier Pintó
- Unidad de Riesgo Vascular, Servicio de Medicina Interna, Hospital Universitario de Bellvitge, L' Hospitalet de Llobregat, Barcelona, España
| | - Melina Vega de Ceniga
- Servicio de Angiología y Cirugía Vascular, Hospital de Galdakao-Usansolo, Vizcaya, España
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Diagnostic imaging methods applied in long-term surveillance after EVAR. Will computed tomography angiography be replaced by other methods? ADVANCES IN INTERVENTIONAL CARDIOLOGY 2016; 12:6-12. [PMID: 26966443 PMCID: PMC4777700 DOI: 10.5114/pwki.2016.56943] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2015] [Accepted: 05/05/2015] [Indexed: 11/23/2022] Open
Abstract
Endovascular implantation of a stent graft in the abdominal aorta (endovascular aneurysm repair – EVAR) is a widely accepted alternative to open surgery in treatment of abdominal aortic aneurysms. Although EVAR is connected with a significant reduction in the risk of peri- and post-operative complications, it does not eliminate them totally. Long-term surveillance of post-EVAR patients is aimed at early detection of and fast reaction to a group of complications called endovascular leaks. Currently, the gold standard in leak diagnostics is computed tomography angiography (CTA). The other methods are ultrasonography, magnetic resonance (MR) angiography, intra-aneurysm sac pressure measurement, X-ray, and digital subtraction angiography (DSA). Despite many analyses based on long-term research, emphasising the high value and competitiveness of less invasive tests such as US or X-ray compared to CTA, it is still difficult for them to win the trust and acceptance of clinicians. The persisting view is that computed tomography is the test that finally resolves any inaccuracies. Consequently, a patient with a number of concurrent diseases is subject to absurdly high radiation exposure and effects of a radiocontrast agent within a short time. It is therefore logical to acknowledge that the EVAR-related risk is catching up with the open surgery risk, while the endovascular procedure is much more costly. Nevertheless, the status of CTA as the gold standard ultimately seems to be unthreatened. This paper presents a description of the diagnostic imaging tests that make it possible to detect any vascular leaks and to develop strategies for therapeutic processes.
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Rahmani S, Grewal IS, Nabovati A, Doyle MG, Roche-Nagle G, Tse LW. Increasing angulation decreases measured aortic stent graft pullout forces. J Vasc Surg 2016; 63:493-9. [DOI: 10.1016/j.jvs.2014.06.115] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2014] [Accepted: 06/14/2014] [Indexed: 11/17/2022]
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Aortoiliac Elongation after Endovascular Aortic Aneurysm Repair. Ann Vasc Surg 2015; 29:891-7. [DOI: 10.1016/j.avsg.2014.12.041] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2014] [Revised: 12/13/2014] [Accepted: 12/17/2014] [Indexed: 11/19/2022]
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Spanos K, Karathanos C, Saleptsis V, Giannoukas AD. Systematic review and meta-analysis of migration after endovascular abdominal aortic aneurysm repair. Vascular 2015; 24:323-36. [DOI: 10.1177/1708538115590065] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Aim To identify patients who are under higher threat for migration because of an old generation stent graft application. Methods A systematic review and meta-analysis of the literature was undertaken to identify all studies which included older generation endografts and data reporting on graft migration after EVAR. Outcome data were pooled and combined, and were calculated using fixed or random effects models. Results From 2000 to 2014, 22 retrospective studies were identified reporting on stent- graft migration after EVAR (8.6%). From those patients, 39% received re-intervention with the mean time of identification ranging from 12 to 36 months. Six of these retrospective nonrandomized studies were eligible for meta-analysis. AAA diameter (AAA diameter: 0.719 mm; 95% confidence interval [CI]: 0.00065–1.4384 mm; p = 0.00497) and neck length (neck length: 4.36 mm; 95% CI: 1.3277–7.394; p = 0.0048) were the only significant factors associated with stent- graft migration. Neck diameter and neck angulation did not have any important influence on stent-graft migration. Conclusions Patients with large AAA and short necks who were treated with older generation stent grafts such as AneurX and Talent are in higher risk for endograft migration than others. Stent- graft migration consists of an insidious and underestimated threat.
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Affiliation(s)
- Konstantinos Spanos
- Department of Vascular Surgery, University Hospital of Larissa, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larissa, Greece
| | - Christos Karathanos
- Department of Vascular Surgery, University Hospital of Larissa, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larissa, Greece
| | - Vasileios Saleptsis
- Department of Vascular Surgery, University Hospital of Larissa, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larissa, Greece
| | - Athanasios D Giannoukas
- Department of Vascular Surgery, University Hospital of Larissa, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larissa, Greece
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Nolz R, Schwartz E, Langs G, Loewe C, Wibmer AG, Prusa AM, Teufelsbauer H, Schoder M. Stent graft surface movement after infrarenal abdominal aortic aneurysm repair: comparison of patients with and without a type 2 endoleak. Eur J Vasc Endovasc Surg 2015; 50:181-8. [PMID: 25920628 DOI: 10.1016/j.ejvs.2015.03.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2014] [Accepted: 03/16/2015] [Indexed: 11/18/2022]
Abstract
OBJECTIVES The aim was to compare multidirectional stent graft movement in patients with and without a type 2 endoleak. METHODS This was a retrospective case control study of patients being followed up after elective endovascular aneurysm repair of abdominal aortic aneurysms. The post-procedural and final follow up multislice computed tomography (MSCT) of 69 patients with and 74 without a type 2 endoleak were analyzed. Three dimensional (3D) surface models of the stent graft, delimited by landmarks using custom built software, were derived from these MSCT data. The stent graft was segmented in different zones, and the proportion of the total stent graft surface moving >9 mm between the post-procedural and the final follow up MSCT was calculated, given in percentages, and compared between groups. Changes of infrarenal neck, renal artery to stent graft distance, and freedom from stent graft related endoleaks were evaluated. RESULTS Overall surface movement was higher in the no endoleak (18.8%, IQR 0.1-45.1%) than in the type 2 endoleak group (5.3%, IQR 0-29.7%; p = .06). Furthermore, significantly higher surface movement in the no endoleak group was found in the proximal anchoring zone (p = .04) and the distal left limb (p = .01), which was the modular limb in 81.1% (p < .01). Neck diameter increase (1.0 mm, IQR 0-3.0 mm; p < .01) and renal artery to stent graft distance difference (0 mm, IQR 0-3.3 mm; p < .01) were significantly higher in the no endoleak group. Five patients in the no endoleak and one patient in the type 2 endoleak group suffered from a stent graft related endoleak (p = .27). CONCLUSIONS The presence of a type 2 endoleak is associated with decreased surface movement of the proximal anchoring zone and the distal modular limb of bifurcated stent grafts.
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Affiliation(s)
- R Nolz
- Department of Biomedical Imaging and Image-guided Therapy, Division of Cardiovascular and Interventional Radiology, Medical University of Vienna, Vienna, Austria.
| | - E Schwartz
- Department of Biomedical Imaging and Image-guided Therapy, Computational and Imaging Research Laboratory, Medical University of Vienna, Vienna, Austria
| | - G Langs
- Department of Biomedical Imaging and Image-guided Therapy, Computational and Imaging Research Laboratory, Medical University of Vienna, Vienna, Austria
| | - C Loewe
- Department of Biomedical Imaging and Image-guided Therapy, Division of Cardiovascular and Interventional Radiology, Medical University of Vienna, Vienna, Austria
| | - A G Wibmer
- Department of Biomedical Imaging and Image-guided Therapy, Division of Cardiovascular and Interventional Radiology, Medical University of Vienna, Vienna, Austria
| | - A M Prusa
- Department of Surgery, Division of Vascular Surgery, Medical University of Vienna, Vienna, Austria
| | - H Teufelsbauer
- Department of Surgery, Division of Vascular Surgery, Medical University of Vienna, Vienna, Austria
| | - M Schoder
- Department of Biomedical Imaging and Image-guided Therapy, Division of Cardiovascular and Interventional Radiology, Medical University of Vienna, Vienna, Austria
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Tsilimparis N, Dayama A, Ricotta JJ. Remodeling of aortic aneurysm and aortic neck on follow-up after endovascular repair with suprarenal fixation. J Vasc Surg 2015; 61:28-34. [DOI: 10.1016/j.jvs.2014.06.104] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2013] [Accepted: 06/11/2014] [Indexed: 10/24/2022]
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Postoperative "Chimney" for Unintentional Renal Artery Occlusion after EVAR. Case Rep Vasc Med 2014; 2014:170198. [PMID: 25478283 PMCID: PMC4247940 DOI: 10.1155/2014/170198] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Accepted: 10/27/2014] [Indexed: 11/18/2022] Open
Abstract
Renal artery obstruction during endovascular repair of abdominal aortic aneurysm using standard device is a rare but life-threatening complication and should be recognized and repaired rapidly in order to maintain renal function. Both conventional surgery and endovascular stenting have been reported. We report a case of late postoperative bilateral “chimney” to resolve a bilateral thrombosis of the renal artery following an uncomplicated endovascular aortic repair.
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Verzini F, Isernia G, De Rango P, Simonte G, Parlani G, Loschi D, Cao P. Abdominal Aortic Endografting Beyond the Trials: A 15-Year Single-Center Experience Comparing Newer to Older Generation Stent-Grafts. J Endovasc Ther 2014; 21:439-47. [DOI: 10.1583/13-4599mr.1] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Abstract
HYPOTHESIS new technology, such as endovascular abdominal aortic aneurysm repair (EVAR) may promote an 'irrational exuberance' for its application. METHODS nonsuprarenal AAA repairs performed at a single institution over a 7 year period were retrospectively studied. Method of repair, 30-day mortality and EVAR aortic neck anatomy were assessed. RESULTS 431 AAA repairs were performed between January 1996 and June 2002, 238 (55%) open and 193 (45%) EVAR. The percentage of EVAR increased steadily from approximately 20% in 1996 and 1997 to a peak of 69.5% in 2000. However, in 2001-2002 the percentage of EVAR fell to approximately 40% of total repairs. In this time period our selection criteria for EVAR became more conservative, with treatment of fewer patients with short aortic necks (12.8 vs. 28.9% with neck length < or = 20 mm, p = 0.05; 3.8 vs. 10.8% with neck length < or = 15 mm, p = 0.1) or highly angulated necks (3.8 vs. 28.9% with neck angulation > or = 40 degrees, p = 0.04) in 2001-2002 versus 1999-2000, respectively. Institutional volume of AAA repairs doubled over the study period (p = 0.001). 30-day mortality over the study period for nonruptured EVAR and open AAA repair was 2.6 and 3.3%, respectively (p = NS). The complexity of open repairs increased significantly during the final 3 years of the review. CONCLUSIONS the application of EVAR has fallen from a high of 69.5% of our AAA repairs in 2000 to approximately 40% in 2001-2002. More prudent patient selection in recent years regarding unfavorable aortic neck anatomy was felt to be a primary etiology of changes in overall EVAR utilization. The anticipated improvement in long-term results from EVAR await multi-year follow-up.
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Lynch B, Nelson J, Kavanagh EG, Walsh SR, McGloughlin TM. A Review of Methods for Determining the Long Term Behavior of Endovascular Devices. Cardiovasc Eng Technol 2013. [DOI: 10.1007/s13239-013-0168-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Singh C, Wang X. A biomimetic approach for designing stent-graft structures: Caterpillar cuticle as design model. J Mech Behav Biomed Mater 2013; 30:16-29. [PMID: 24216309 DOI: 10.1016/j.jmbbm.2013.10.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2013] [Revised: 10/09/2013] [Accepted: 10/13/2013] [Indexed: 10/26/2022]
Abstract
Stent-graft (SG) induced biomechanical mismatch at the aortic repair site forms the major reason behind postoperative hemodynamic complications. These complications arise from mismatched radial compliance and stiffness property of repair device relative to native aortic mechanics. The inability of an exoskeleton SG design (an externally stented rigid polyester graft) to achieve optimum balance between structural robustness and flexibility constrains its biomechanical performance limits. Therefore, a new SG design capable of dynamically controlling its stiffness and flexibility has been proposed in this study. The new design is adopted from the segmented hydroskeleton structure of a caterpillar cuticle and comprises of high performance polymeric filaments constructed in a segmented knit architecture. Initially, conceptual design models of caterpillar and SG were developed and later translated into an experimental SG prototype. The in-vitro biomechanical evaluation (compliance, bending moment, migration intensity, and viscoelasticity) revealed significantly better performance of hydroskeleton structure than a commercial SG device (Zenith(™) Flex SG) and woven Dacron(®) graft-prosthesis. Structural segmentation improved the biomechanical behaviour of new SG by inducing a three dimensional volumetric expansion property when the SG was subjected to hoop stresses. Interestingly, this behaviour matches the orthotropic elastic property of native aorta and hence proposes segmented hydroskeleton structures as promising design approach for future aortic repair devices.
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Affiliation(s)
- Charanpreet Singh
- Australian Future Fibres Research and Innovation Centre, Institute for Frontier Materials, Deakin University, Geelong, VIC 3216, Australia
| | - Xungai Wang
- Australian Future Fibres Research and Innovation Centre, Institute for Frontier Materials, Deakin University, Geelong, VIC 3216, Australia; Ministry of Education Key Laboratory for Textile Fibers and Products, Wuhan Textile University, Wuhan 430073, China.
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Affiliation(s)
- Frank Vandy
- Cardiovascular Center, University of Michigan, Ann Arbor, USA
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England A, García-Fiñana M, Fisher RK, Naik JB, Vallabhaneni SR, Brennan JA, McWilliams RG. Migration of fenestrated aortic stent grafts. J Vasc Surg 2013; 57:1543-52. [DOI: 10.1016/j.jvs.2012.12.035] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2012] [Revised: 12/05/2012] [Accepted: 12/09/2012] [Indexed: 11/27/2022]
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Yoo YS, Park HS, Lee TS. Total Laparoscopic Abdominal Aortic Aneurysm Repair: A Case Report. Vasc Specialist Int 2013. [DOI: 10.5758/kjves.2013.29.2.58] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Young Sun Yoo
- Department of Surgery, Chosun University College of Medicine, Gwangju, Korea
| | - Hyung Sub Park
- Department of Surgery, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea
- Department of Surgery, Seoul National University College of Medicine, Seoul, Korea
| | - Tae Seung Lee
- Department of Surgery, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea
- Department of Surgery, Seoul National University College of Medicine, Seoul, Korea
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Abstract
PURPOSE OF REVIEW To review the current state of diagnosis, treatment, and outcomes of the different types of endoleaks after endovascular abdominal aortic aneurysm repair (endovascular aneurysm repair, EVAR). RECENT FINDINGS Endoleaks are the most frequent complication after EVAR, the most common indication for secondary interventions, and the most common cause of rupture after EVAR. Imaging is critical for detecting endoleaks. Type I and III endoleaks require urgent intervention to prevent aneurysm rupture. Intervention for other endoleaks or endotension is indicated if the aneurysm sac continues to grow during follow-up. The majority of endoleaks can be treated with endovascular techniques. Open surgical conversion may be considered if the risk of aneurysm rupture is high and if no endovascular options are available or if they have failed. SUMMARY Endoleaks continue to be a challenge and this article discusses the different treatment options for endoleaks after EVAR. Long-term follow-up after EVAR is required to diagnose and treat endoleaks before they result in aneurysm rupture. The majority of endoleaks can be treated with endovascular techniques, although open surgical interventions may be required in selected patients.
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Bail DHL, Walker T, Giehl J. Vascular Endostapling Systems for Vascular Endografts (T)EVAR—Systematic Review—Current State. Vasc Endovascular Surg 2013; 47:261-6. [DOI: 10.1177/1538574413478474] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Purpose: Recently, vascular endostapling systems were developed to achieve better sealing at the proximal neck of the aneurysm and to prevent endograft migration. The purpose of this study was to provide a systematic review about the current state and possible options of vascular endostapling systems. Results: No randomized controlled trials were published. The results showed that the use of an endostaple system considerably reduced the rates of endoleaks type 1a and endograft migration. Regarding the use of endostaples in different types of endografts, only a few results were available. Conclusion: The results are not conclusive. With endostaple systems, patients with difficult anatomic features and high risk can potentially be treated. These systems might reduce the high reintervention rates after endovascular aneurysm repair. Controlled randomized trials with larger number of patients are warranted with endostapling use in primary endograft implantation and for use in reintervention for late endoleaks or endograft migrations.
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Affiliation(s)
- Dorothee H. L. Bail
- KCQ - Competence-Center Quality Assurance, Medical Service of Statutory Healthcare Insurance, Tuebingen, Germany
| | - Tobias Walker
- Department of Thoracic-, Cardiac- and Vascular Surgery, University Hospital Tuebingen, Tuebingen, Germany
| | - Johannes Giehl
- KCQ - Competence-Center Quality Assurance, Medical Service of Statutory Healthcare Insurance, Tuebingen, Germany
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England A, García-Fiñana M, How TV, Vallabhaneni SR, McWilliams RG. The accuracy of computed tomography central luminal line measurements in quantifying stent graft migration. J Vasc Surg 2012; 55:895-905. [DOI: 10.1016/j.jvs.2011.10.083] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2011] [Revised: 09/28/2011] [Accepted: 10/13/2011] [Indexed: 10/14/2022]
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Rutherford RB. Open Versus Endovascular Stent Graft Repair for Abdominal Aortic Aneurysms: An Historical View. Semin Vasc Surg 2012; 25:39-48. [DOI: 10.1053/j.semvascsurg.2012.03.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Jim J, Rubin BG, Sanchez LA. Use of a bifurcated endovascular graft for treatment of endograft migration with major endoleak. Vascular 2011; 20:49-53. [PMID: 22126799 DOI: 10.1258/vasc.2011.cr0285] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The purpose of this study was to describe the use of a bifurcated endovascular graft to treat endograft migration with major endoleaks. We present four patients who presented at a mean of 72.0 months after their initial endovascular abdominal aortic aneurysm repair. Three patients had type I endoleaks resulting from proximal attachment failure and graft migration. A fourth patient had separation of a proximal aortic cuff from a migrated main body device resulting in a type III endoleak. All were treated with a bifurcated Zenith (Cook Medical Incorporated, Bloomington, IN, USA) endovascular graft. There was 100% technical success with no perioperative complications. On follow-up, one patient died of unrelated causes at five months. The mean survival for the remaining three patients was 37 months. In conclusion, treatment with a bifurcated Zenith endograft has advantages over the use of an aortic cuff or aortouniiliac reconstruction. To perform this technique, there must be a sufficient distance between the proximal landing zone and the flow divider of the migrated endograft to allow for deployment of the Zenith device. While there remain limitations in its applicability, the use of a bifurcated endovascular graft is a viable alternative for endovascular salvage in treatment of endograft migration with major endoleaks.
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Affiliation(s)
- Jeffrey Jim
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine, St Louis, MO, USA
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Pintoux D, Chaillou P, Azema L, Bizouarn P, Costargent A, Patra P, Gouëffic Y. Long-Term Influence of Suprarenal or Infrarenal Fixation on Proximal Neck Dilatation and Stentgraft Migration After EVAR. Ann Vasc Surg 2011; 25:1012-9. [DOI: 10.1016/j.avsg.2010.08.013] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2009] [Revised: 03/24/2010] [Accepted: 08/08/2010] [Indexed: 12/13/2022]
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Avgerinos ED, Dalainas I, Kakisis J, Moulakakis K, Giannakopoulos T, Liapis CD. Endograft Accommodation on the Aortic Bifurcation:An Overview of Anatomical Fixation and Implications for Long-term Stent-Graft Stability. J Endovasc Ther 2011; 18:462-70. [DOI: 10.1583/11-3411.1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Jim J, Rubin BG, Geraghty PJ, Money SR, Sanchez LA. Midterm outcomes of the Zenith Renu AAA Ancillary Graft. J Vasc Surg 2011; 54:307-315.e1. [DOI: 10.1016/j.jvs.2010.12.058] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2010] [Revised: 12/16/2010] [Accepted: 12/16/2010] [Indexed: 11/17/2022]
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Celoria GM, Stefanini T, Brancaccio G, Vecchiati E. The ‘docking maneuver’ for Gore Excluder positioning in the treatment of abdominal aortic aneurysms with an ectatic neck. Vascular 2011; 19:214-7. [DOI: 10.1258/vasc.2010.tn0014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The aim was to present a technical modification to the ‘funnel technique’ that allows endovascular repair of infrarenal abdominal aortic aneurysms with an ectatic neck. The body of the Excluder endograft is opened inside the aneurysm, using the slow deployment technique, stopping as soon as the contralateral limb is open. The gate is cannulated in the usual fashion. A percutaneous transluminal angioplasty (PTA) balloon is introduced in the contralateral limb and inflated to nominal pressure. By pulling the introducer of the Excluder delivery system on one side and the PTA balloon on the other, the graft is positioned on the bifurcation with the contralateral leg inside the common iliac artery. At this point, the ipsilateral iliac leg is deployed and the thoracic endograft can be positioned through the abdominal component. Finally, the contralateral iliac leg is deployed. The technique described offers a simple method to treat aortic abdominal aneurysms with an ectatic neck by positioning a bifurcated abdominal graft in such a way that subsequent insertion of the thoracic component is facilitated.
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Affiliation(s)
| | - Teseo Stefanini
- Department of Interventional Radiology, S. Andrea Hospital, La Spezia
| | | | - Enrico Vecchiati
- Department of Vascular Surgery, Arcispedale S. Maria Nuova, Reggio Emilia, Italy
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Grande W, Stavropoulos SW. Treatment of complications following endovascular repair of abdominal aortic aneurysms. Semin Intervent Radiol 2011; 23:156-64. [PMID: 21326759 DOI: 10.1055/s-2006-941446] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Endovascular aneurysm repair (EVAR) is an important treatment option for abdominal aortic aneurysms, with lower perioperative morbidity and mortality rates than open surgical aneurysm repair. However, EVAR is associated with several unique complications that are not encountered with surgical repair such as endoleaks, graft migration, and renal artery occlusion. Preservation of the morbidity and mortality advantages of EVAR relies on the successful treatment of these complications by minimally invasive, endovascular approaches. Some of the techniques used to treat EVAR complications include balloon dilation and stenting, deployment of additional stent-graft pieces, coil embolization, and thrombolysis. Although the employment of these endovascular salvage techniques is common, data regarding their intermediate- to long-term efficacy is sparse, and further studies are needed to determine their efficacy in preventing conversion to open aneurysm repair and aneurysm rupture.
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Affiliation(s)
- William Grande
- Department of Radiology, Division of Interventional Radiology, Hospital of University of Pennsylvania, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania
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Park EJ, Kim HT, Cho WH, Kim YH. Type I Endoleak Five Year after Endovascular Repair of Abdominal Aortic Aneurysm. Vasc Specialist Int 2011. [DOI: 10.5758/kjves.2011.27.2.76] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Ei Jun Park
- Department of Surgery, Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea
| | - Hyoung Tae Kim
- Department of Surgery, Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea
| | - Won Hyun Cho
- Department of Surgery, Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea
| | - Young Hwan Kim
- Department of Radiology, Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea
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