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Bilgin C, Senol YC, Kobeissi H, Orscelik A, Ghozy S, Oliver AA, Kadirvel R, Brinjikji W, Kallmes DF. Phenox HPC and Phenox flow modulation devices for the endovascular treatment of intracranial aneurysms: a systematic review and meta-analysis. J Neurointerv Surg 2024; 16:706-714. [PMID: 37536930 DOI: 10.1136/jnis-2023-020514] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Accepted: 07/12/2023] [Indexed: 08/05/2023]
Abstract
BACKGROUND Surface-modified flow diverters are increasingly used in clinical settings. However, their safety profiles and additional benefits over non-coated devices still need to be explored. In this meta-analysis, we aimed to investigate and compare the clinical outcomes of the uncoated Phenox and coated Phenox HPC flow diverters. METHODS A systematic literature review was performed using PubMed, Scopus, Embase, and Web of Science databases. Collected data were pooled and corresponding 95% confidence intervals (CI) were calculated. Outcomes of interest included aneurysm occlusion (>6 months) and complication rates. Additionally, the safety outcomes of prophylactic single (SAPT) and dual antiplatelet treatment (DAPT) approaches were compared for patients treated with coated Phenox HPC flow diverters. RESULTS We included 17 studies with 1238 patients. The overall complete occlusion rates were 80% (95% CI 74.01% to 86.56%) for Phenox HPC and 71.3% (95% CI 59.71% to 85.20%) for non-coated Phenox flow diverters (p=0.24). Ischemic complication rates were 7.3% (95% CI 4.6% to 11.39%) with the Phenox HPC and 5.3% (95% CI 4.07% to 6.91%) with the Phenox (p=0.24). For patients treated with Phenox HPC, the SAPT (5.5%; 95% CI 2.83% to 10.85%) and DAPT (7.1%; 95% CI 1.23% to 41.45%) approaches resulted in comparable ischemic complication rates (p=0.79). The DAPT group (4.8%; 95% CI 1.46% to 16.24%) had higher hemorrhagic complication rates than the SAPT group (1.7%; 95% CI 0.52% to 6.09%), but the difference was not statistically significant for patients treated with Phenox HPC (p=0.25). CONCLUSIONS Our findings indicate that Phenox HPC is equally as safe and effective as non-coated Phenox devices. Additionally, our results suggest that prasugrel monotherapy might effectively prevent ischemic complications in patients treated with Phenox HPC flow diverters.
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Affiliation(s)
- Cem Bilgin
- Department of Radiology, Mayo Clinic, Rochester, Minnesota, USA
| | - Yigit Can Senol
- Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Hassan Kobeissi
- Department of Radiology, Mayo Clinic, Rochester, Minnesota, USA
| | - Atakan Orscelik
- Department of Radiology, Mayo Clinic, Rochester, Minnesota, USA
| | - Sherief Ghozy
- Department of Radiology, Mayo Clinic, Rochester, Minnesota, USA
| | | | | | - Waleed Brinjikji
- Department of Radiology, Mayo Clinic, Rochester, Minnesota, USA
- Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - David F Kallmes
- Department of Radiology, Mayo Clinic, Rochester, Minnesota, USA
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Khanafer A, Henkes H, Cohen J, Albiña-Palmarola P, Gomori JM, Forsting M, von Gottberg P. Endovascular treatment of distal anterior cerebral artery aneurysms using flow modulation devices: mid- and long-term results from a two-center study. Front Neurol 2024; 15:1368612. [PMID: 38529030 PMCID: PMC10962386 DOI: 10.3389/fneur.2024.1368612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Accepted: 02/28/2024] [Indexed: 03/27/2024] Open
Abstract
Purpose Flow-diverter (FD) stents have become an established treatment for intracranial aneurysms in recent years, but their use for aneurysms in distal cerebral vessels with small carrier vessel diameters remains controversial. This study describes the method and mid- and long-term outcomes of FD treatment of distal anterior cerebral artery aneurysms (DACAAs) at two neurointerventional centers, to elucidate this topic and provide more in-depth data. Methods Data for all patients at two neurointerventional centers who were treated with FDs for DACAAs in the pericallosal and supracallosal segment of the anterior cerebral artery were retrospectively analyzed. Data on periprocedural complications, and short-, mid- and long-term follow-up findings were recorded. Results Forty-one patients were eligible for inclusion in the study. Three FD models were used, one of which had an anti-thrombotic coating. Two periprocedural complications (5%) occurred but did not cause a change in the mRS. In the long-term follow-up, at 29 months and beyond, 83% of assessable patients showed complete occlusion of the aneurysms without new neurological deficits. Conclusion FDs are a safe and effective treatment approach for DACAAs. This study indicated a low risk of complications, and high closure rates in short-, mid- and long-term follow-up.
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Affiliation(s)
- Ali Khanafer
- Neuroradiologische Klinik, Klinikum Stuttgart, Stuttgart, Germany
| | - Hans Henkes
- Neuroradiologische Klinik, Klinikum Stuttgart, Stuttgart, Germany
- Medizinische Fakultät, Universität Duisburg-Essen, Essen, Germany
| | - Jose Cohen
- Department of Neurosurgery, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - Pablo Albiña-Palmarola
- Neuroradiologische Klinik, Klinikum Stuttgart, Stuttgart, Germany
- Medizinische Fakultät, Universität Duisburg-Essen, Essen, Germany
| | - John Moshe Gomori
- Department of Radiology, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - Michael Forsting
- Medizinische Fakultät, Universität Duisburg-Essen, Essen, Germany
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Ernst M, Jamous A, Bartl M, Riedel CH, Holtmannspötter M, Voit-Höhne H, Grieb D, Schlunz-Hendann M, Fiebig T, Fiorella D, Klisch J, Lobsien D. Multicenter study of the safety and effectiveness of intracranial aneurysm treatment with the p64MW-HPC flow modulation device. Interv Neuroradiol 2023:15910199231220964. [PMID: 38105527 DOI: 10.1177/15910199231220964] [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: 12/19/2023] Open
Abstract
BACKGROUND AND PURPOSE The new p64 flow diverter with hydrophilic polymer coating (HPC) was designed to reduce thrombogenicity. To date, it is unclear how antithrombogenic surface modifications affect neoendothelialization and thrombus formation in patients with unruptured intracranial aneurysms. The purpose of this study was to evaluate the safety and effectiveness of the p64MW-HPC in the treatment of unruptured aneurysms of small to giant size and of both the anterior and posterior circulation. MATERIALS AND METHODS Between March 2020 and October 2022 all patients with unruptured intracranial aneurysms treated with the p64MW-HPC were included at five neurovascular centers. Demographic data, aneurysm characteristics, antiplatelet therapy, procedural complications, and clinical and angiographic outcomes were recorded. RESULTS A total of 100 patients with 100 unruptured intracranial aneurysms met the inclusion criteria. Eighty-three aneurysms were classified as saccular, 12 aneurysms were fusiform, 4 aneurysms dissecting, and 1 aneurysm was blister-like. Dual antiplatelet therapy with Clopidogrel and Aspirin was given in 68 cases, and with Ticagrelor and Aspirin in 24 cases. Technical issues with deployment were encountered in 14 cases (torsion (n = 3), foreshortening (n = 8), and incomplete opening (n = 3)). Ischemic stroke occurred in a total of seven cases. In one patient a wire perforation and subsequent severe ICH occurred. Complete aneurysm occlusion at angiographic follow-up (mean time = 7 months) was seen in 73% and adequate occlusion in 93%. CONCLUSION This study is the largest multicenter study to date documenting the safety and effectiveness of the new antithrombogenic p64MW-HPC in the treatment of unruptured intracranial aneurysms of the anterior and posterior circulation.
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Affiliation(s)
- M Ernst
- Institute of Diagnostic and Interventional Neuroradiology, University Medical Center Göttingen, Göttingen, Germany
| | - A Jamous
- Institute of Diagnostic and Interventional Neuroradiology, University Medical Center Göttingen, Göttingen, Germany
| | - M Bartl
- Department of Neurology, University Medical Center Göttingen, Göttingen, Germany
| | - C H Riedel
- Institute of Diagnostic and Interventional Neuroradiology, University Medical Center Göttingen, Göttingen, Germany
| | - M Holtmannspötter
- Institute of Radiology und Neuroradiology, Paracelsus Medical University, Nuremberg, Germany
| | - H Voit-Höhne
- Institute of Radiology und Neuroradiology, Paracelsus Medical University, Nuremberg, Germany
| | - D Grieb
- Department of Radiology and Neuroradiology, Klinikum Duisburg-Sana Kliniken, Duisburg, Germany
- Department of Diagnostic and Interventional Neuroradiology, Medical School Hannover, Hannover, Germany
| | - M Schlunz-Hendann
- Department of Radiology and Neuroradiology, Klinikum Duisburg-Sana Kliniken, Duisburg, Germany
| | - T Fiebig
- Department of Radiology, Helios Klinikum Meiningen, Meiningen, Germany
| | - D Fiorella
- Cerebovascular Center, Stony Brook University, Stony Brook, NY, USA
| | - J Klisch
- Institute of Diagnostic and Interventional Neuroradiology, Helios Klinikum Erfurt, Erfurt, Germany
| | - D Lobsien
- Institute of Diagnostic and Interventional Neuroradiology, Helios Klinikum Erfurt, Erfurt, Germany
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White TG, Santhumayor BA, Turpin J, Shah K, Toscano D, Teron I, Link T, Patsalides A, Woo HH. Flow diverter surface modifications for aneurysm treatment: A review of the mechanisms and data behind existing technologies. Interv Neuroradiol 2023:15910199231207550. [PMID: 37899636 DOI: 10.1177/15910199231207550] [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: 10/31/2023] Open
Abstract
Flow diversion (FD) has become a mainstay treatment for large wide-necked aneurysms. Despite excellent safety and efficacy, the risk of thromboembolic complications necessitates the use of dual antiplatelet therapy (DAPT). The use of DAPT makes hemorrhagic complications of stenting carry high morbidity and mortality. Additionally, DAPT usage carries a risk of "nuisance" complications that do not directly impact intracranial circulation but need to be managed nonetheless. To circumvent this issue, the most recent generation of flow diverters have undergone surface modification with various compounds to confer blood compatibility to limit clotting and thrombosis. While these newer generation flow diverters are marketed to enhance ease of deployment, the goal is to eventually facilitate single antiplatelet use with flow diverter treatment. This generation of FDs have potential to expand indications beyond unruptured wide-necked aneurysms to include ruptured intracranial aneurysms without the necessity of DAPT. Currently, no comprehensive review details the molecular mechanisms and pre-clinical and clinical data on these modifications. We seek to fill this gap in the literature by consolidating information on the coating technology for four major FDs currently in clinical use-PipelineTM Flex and Vantage Shield TechnologyTM, FREDTMX, p48/64 hydrophilic coating, and Acandis Dervio® 2heal-to serve as a reference guide in neurointerventional aneurysm treatment. Although the Balt silkTM was one of the first FDs, it is uncoated, thus we will not cover this device in our review. A literature review was performed to obtain information on each coating technology for the major flow diverters currently on the market using international databases (PUBMED, Embase, Medline, Google Scholar). The search criteria used the keywords for each coating technology of interest "phosphorylcholine," "poly 2-methoxyethyl acrylate," "hydrophilic polymer coating," and "fibrin-heparin" Keywords related to the device names "Pipeline Shield," "Pipeline Shield with Flex Technology," "FRED," "FREDX," "p64," "p64-HPC," "Derivo 2heal" were also used. Studies that detailed the mechanism of action of the coating, any pre-clinical studies with surface-modified intravascular devices, and any clinical retrospective series, prospective series, or randomized clinical trials with surface-modified devices for aneurysm treatment were included.
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Affiliation(s)
- Timothy G White
- Department of Neurosurgery, North Shore University Hospital, Donald and Barbara Zucker School of Medicine, Manhasset, NY, USA
| | - Brandon A Santhumayor
- Department of Neurosurgery, North Shore University Hospital, Donald and Barbara Zucker School of Medicine, Manhasset, NY, USA
| | - Justin Turpin
- Department of Neurosurgery, North Shore University Hospital, Donald and Barbara Zucker School of Medicine, Manhasset, NY, USA
| | - Kevin Shah
- Department of Neurosurgery, North Shore University Hospital, Donald and Barbara Zucker School of Medicine, Manhasset, NY, USA
| | - Daniel Toscano
- Department of Neurosurgery, North Shore University Hospital, Donald and Barbara Zucker School of Medicine, Manhasset, NY, USA
| | - Ina Teron
- Department of Neurosurgery, North Shore University Hospital, Donald and Barbara Zucker School of Medicine, Manhasset, NY, USA
| | - Thomas Link
- Department of Neurosurgery, North Shore University Hospital, Donald and Barbara Zucker School of Medicine, Manhasset, NY, USA
| | - Athos Patsalides
- Department of Neurosurgery, North Shore University Hospital, Donald and Barbara Zucker School of Medicine, Manhasset, NY, USA
| | - Henry H Woo
- Department of Neurosurgery, North Shore University Hospital, Donald and Barbara Zucker School of Medicine, Manhasset, NY, USA
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Shehata MA, Ibrahim MK, Ghozy S, Bilgin C, Jabal MS, Kadirvel R, Kallmes DF. Long-term outcomes of flow diversion for unruptured intracranial aneurysms: a systematic review and meta-analysis. J Neurointerv Surg 2023; 15:898-902. [PMID: 36150896 PMCID: PMC10033458 DOI: 10.1136/jnis-2022-019240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Accepted: 08/26/2022] [Indexed: 11/04/2022]
Abstract
BACKGROUND Flow diverters have been widely used in clinical practice for more than a decade. However, most outcome data are limited to 1 year timepoints. This study aims to offer meta-analysis data on long-term (>1 year) safety and effectiveness results for patients with aneurysms treated with flow diverters. METHODS PubMed, Web of Science, Embase, and SCOPUS were searched up to February 24, 2022 using the AutoLit platform. We included primary studies assessing the long-term outcomes for flow diverter devices to manage unruptured internal carotid artery aneurysms with a follow-up period of >1 year. The meta-analysis was carried out using Comprehensive Meta-Analysis software (CMA). RESULTS Eleven studies were included in the meta-analysis. The pooled occlusion rates after flow diversion treatment for unruptured intracranial brain aneurysms were 77%, 87.4%, 84.5%, 89.4%, 96% for 1 year, 1-2 years, 2 years, 3 years, and 5 years follow-up, respectively. The in-stent stenosis rate was 4.8% and the retreatment rate for the long-term follow-up period was 5%. No delayed rupture of the aneurysm was reported, and there was one case of delayed ischemic stroke. The sensitivity analysis of the prospective studies showed a complete occlusion rate of 83.5% and 85.2% for 1 and 3 years of follow-up, respectively. CONCLUSION Flow diverters are safe and effective in short- and long-term follow-up and rarely cause serious delayed side effects.
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Affiliation(s)
| | | | - Sherief Ghozy
- Department of Radiology, Mayo Clinic, Rochester, Minnesota, USA
| | - Cem Bilgin
- Department of Radiology, Mayo Clinic, Rochester, Minnesota, USA
| | | | | | - David F Kallmes
- Department of Radiology, Mayo Clinic, Rochester, Minnesota, USA
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6
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Nariai Y, Takigawa T, Hyodo A, Suzuki K. Acute Distal Migration and Shortening of the Flow-Redirection Endoluminal Device: A Case Report. JOURNAL OF NEUROENDOVASCULAR THERAPY 2023; 17:132-138. [PMID: 37546345 PMCID: PMC10400909 DOI: 10.5797/jnet.cr.2023-0011] [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: 02/24/2023] [Accepted: 05/08/2023] [Indexed: 08/08/2023]
Abstract
Objective The flow diverter (FD) is a promising device. Apart from two main complications, hemorrhagic and ischemic ones, stent migration is reportedly an unusual complication. In particular, distal migration of the FD has rarely been reported. We report a case of asymptomatic acute distal migration of the flow-redirection endoluminal device (FRED). Case Presentation A 50-year-old woman was incidentally diagnosed with an unruptured right internal carotid-ophthalmic artery aneurysm with a maximum diameter of 8.0 mm, and she subsequently underwent endovascular treatment with FRED. Based on the vessel diameter (3.8 mm proximal and 3.6 mm distal to the aneurysm), a 4.0-mm-diameter and 18-mm-long FRED was deployed without postoperative complications. However, on MRA 12 months after treatment, the aneurysm was not occluded; angiography showed distal migration of the FRED. The postoperative MRA and skull X-ray images were retrospectively reviewed to determine the period of the migration. The skull X-ray images and the signal loss area due to the FRED on MRA 1 day after the treatment had already demonstrated the migration of the FRED. In the second treatment, a 4.0-mm-diameter and 23-mm-long FRED was deployed in an overlapping fashion up to the proximal part of the carotid siphon. Prompt identification of distal migration of the FD without neurologic signs could be challenging. Conclusion It is important to follow up meticulously with MRA and skull X-ray images after FD treatment for detecting stent migrations as early as possible.
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Affiliation(s)
- Yasuhiko Nariai
- Department of Neurosurgery, Dokkyo Medical University Saitama Medical Center, Koshigaya, Saitama, Japan
| | - Tomoji Takigawa
- Department of Neurosurgery, Dokkyo Medical University Saitama Medical Center, Koshigaya, Saitama, Japan
| | - Akio Hyodo
- Department of Neurosurgery, Kamagaya General Hospital, Kamagaya, Chiba, Japan
| | - Kensuke Suzuki
- Department of Neurosurgery, Dokkyo Medical University Saitama Medical Center, Koshigaya, Saitama, Japan
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Simgen A, Roth C, Kulikovski J, Papanagiotou P, Roumia S, Dietrich P, Mühl-Benninghaus R, Kettner M, Reith W, Yilmaz U. Endovascular treatment of unruptured intracranial aneurysms with flow diverters: A retrospective long-term single center analysis. Neuroradiol J 2023; 36:76-85. [PMID: 35695038 PMCID: PMC9893170 DOI: 10.1177/19714009221108678] [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: 02/05/2023] Open
Abstract
PURPOSE The introduction of flow diverters (FDs) in 2007 greatly enhanced the treatment of intracranial aneurysms. Here, we present our long-term clinical experience in treating unruptured intracranial aneurysms with FDs. METHODS 107 patients with unruptured aneurysms and treated with an FD between 2010 and 2019 were retrospectively reviewed. Aneurysm occlusion, procedural complications, and clinical outcome were evaluated. RESULTS Angiographic follow-up was available for 93 patients with a mean long-term follow-up time of 28.4 ± 21.6 months. Additional coiling was performed in 15.1% of patients (n = 14). Adequate aneurysm occlusion (Kamran grades 3 and 4) at long-term follow-up was achieved in 94.6% of patients (n = 88). 3.2% (n = 3) required endovascular retreatment since the last follow-up showed a lack of aneurysm occlusion (Kamran grade 0) due to a foreshortening of the FD. Incomplete opening of the FD and parent vessel occlusion was seen in 1.1% (n = 1) and 3.2% (n = 3) of patients, respectively. In-stent stenosis was observed in 57% (n = 53) of cases at short-term follow-up and 22.6% (n = 21) at long-term, which were moderate and asymptomatic overall. In-stent stenosis decreased significantly between short- and long-term follow-ups (31.4 ± 17.0% vs 9.7 ± 13.6%, respectively; p ≤ 0.001). Thromboembolic and hemorrhagic events occurred in 7.5% (n = 7) and 1.1% (n = 1) of patients, respectively. Good clinical outcome (modified Rankin scale: 0-2) was obtained in 97.8% (n = 91) leading to an overall treatment-related morbidity of 2.2% (n = 2). There was no procedural mortality. CONCLUSION Our study shows that FD treatment of unruptured intracranial aneurysms is effective and safe with high occlusion rates and low rates of permanent morbidity at long-term follow-up.
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Affiliation(s)
- Andreas Simgen
- Department of Neuroradiology, Saarland University
Hospital, Homburg/Saar, Germany
| | - Christian Roth
- Department of Neuroradiology, Saarland University
Hospital, Homburg/Saar, Germany
| | - Johann Kulikovski
- Department of Neuroradiology, Saarland University
Hospital, Homburg/Saar, Germany
| | | | - Safwan Roumia
- Department of Neuroradiology, Saarland University
Hospital, Homburg/Saar, Germany
| | - Philipp Dietrich
- Department of Neuroradiology, Saarland University
Hospital, Homburg/Saar, Germany
| | | | - Michael Kettner
- Department of Neuroradiology, Saarland University
Hospital, Homburg/Saar, Germany
| | - Wolfgang Reith
- Department of Neuroradiology, Saarland University
Hospital, Homburg/Saar, Germany
| | - Umut Yilmaz
- Department of Neuroradiology, Saarland University
Hospital, Homburg/Saar, Germany
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Bonafe A, Perez MA, Henkes H, Lylyk P, Bleise C, Gascou G, Sirakov S, Sirakov A, Stockx L, Turjman F, Petrov A, Roth C, Narata AP, Barreau X, Loehr C, Berlis A, Pierot L, Miś M, Goddard T, Clifton A, Klisch J, Wałęsa C, Dall'Olio M, Spelle L, Clarencon F, Yakovlev S, Keston P, Nuzzi NP, Dima S, Wendl C, Willems T, Schramm P. Diversion-p64: results from an international, prospective, multicenter, single-arm post-market study to assess the safety and effectiveness of the p64 flow modulation device. J Neurointerv Surg 2021; 14:898-903. [PMID: 34782399 PMCID: PMC9380510 DOI: 10.1136/neurintsurg-2021-017809] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Accepted: 09/21/2021] [Indexed: 11/03/2022]
Abstract
BACKGROUND The use of flow diversion to treat intracranial aneurysms has increased in recent years. OBJECTIVE To assess the safety and angiographic efficacy of the p64 flow modulation device. METHODS Diversion-p64 is an international, prospective, multicenter, single-arm, study conducted at 26 centers. The p64 flow modulation device was used to treat anterior circulation aneurysms between December 2015 and January 2019. The primary safety endpoint was the incidence of major stroke or neurologic death at 3-6 months, with the primary efficacy endpoint being complete aneurysm occlusion (Raymond-Roy Occlusion Classification 1) on follow-up angiography. RESULTS A total of 420 patients met the eligibility criteria and underwent treatment with the p64 flow modulation device (mean age 55±12.0 years, 86.2% female). Mean aneurysm dome width was 6.99±5.28 mm and neck width 4.47±2.28 mm. Mean number of devices implanted per patient was 1.06±0.47, with adjunctive coiling performed in 14.0% of the cases. At the second angiographic follow-up (mean 375±73 days), available for 343 patients (81.7%), complete aneurysm occlusion was seen in 287 (83.7%) patients. Safety data were available for 413 patients (98.3%) at the first follow-up (mean 145±43 days) with a composite morbidity/mortality rate of 2.42% (n=10). CONCLUSIONS Diversion-p64 is the largest prospective study using the p64 flow modulation device. The results of this study demonstrate that the device has a high efficacy and carries a low rate of mortality and permanent morbidity.
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Affiliation(s)
- Alain Bonafe
- Department of Neuroradiology, Hopital Gui de Chauliac, Montpellier, France
| | - Marta Aguilar Perez
- Neuroradiologische Klinik, Klinikum Stuttgart, Stuttgart, Baden-Württemberg, Germany
| | - Hans Henkes
- Neuroradiologische Klinik, Klinikum Stuttgart, Stuttgart, Baden-Württemberg, Germany
| | - Pedro Lylyk
- Departamento de Neurociencias, ENERI, Clínica La Sagrada Familia, Buenos Aires, Argentina
| | - Carlos Bleise
- Departamento de Neurociencias, ENERI, Clínica La Sagrada Familia, Buenos Aires, Argentina
| | - Gregory Gascou
- Department of Neuroradiology, Centre Hospitalier Universitaire de Montpellier, Montpellier, France
| | - Stanimir Sirakov
- Department of Radiology, University Hospital St Ivan Rilski, Sofia, Bulgaria
| | - Alexander Sirakov
- Department of Radiology, University Hospital St Ivan Rilski, Sofia, Bulgaria
| | - Luc Stockx
- Neuroradiology, Ziekenhuis Oost-Limburg - Campus Sint Jan, Genk, Belgium
| | - Francis Turjman
- Department of Interventional Neuroradiology, Hôpital Neurologique Pierre Wertheimer, Lyon, France
| | - Andrey Petrov
- Department of Vascular Neurosurgery, Russian Polenov Neurosurgical Institute, Federal Almazov North West Medical Research Centre, St Petersburg, Russian Federation
| | - Christian Roth
- Department of Diagnostic and Interventional Neuroradiology, Klinikum Bremen-Mitte gGmbH, Bremen, Germany
| | - Ana-Paula Narata
- Department of Interventional Neuroradiology, Regional University Hospital, Tours, France
| | - Xavier Barreau
- Department of Neuroradiology, Centre Hospitalier Universitaire de Bordeaux Groupe hospitalier Pellegrin, Bordeaux, France
| | - Christian Loehr
- Department of Radiology and Neuroradiology, Klinikum Vest GmbH Behandlungszentrum Knappschaftskrankenhaus Recklinghausen, Recklinghausen, Nordrhein-Westfalen, Germany
| | - Ansgar Berlis
- Department of Diagnostic and Interventional Neuroradiology, Klinikum Augsburg, Augsburg, Bayern, Germany
| | - Laurent Pierot
- Department of Neuroradiology, Hôpital Maison Blanche, Reims, France
| | - Marcin Miś
- Department of General Radiology, Interventional Radiology, and Neuroradiology, Wroclaw Medical University, Wroclaw, Dolnoslaskie, Poland
| | - Tony Goddard
- Department of Neuroradiology, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - Andy Clifton
- Department of Neuroradiology, St George's Hospital, London, UK
| | - Joachim Klisch
- Department of Neuroradiology, HELIOS Klinikum Erfurt, Erfurt, Thüringen, Germany
| | - Cezary Wałęsa
- Neuroradiology, Regionalny Szpital Specjalistyczny im dr Wl Bieganskiego, Grudziadz, Poland
| | - Massimo Dall'Olio
- Neuroradiology, Ospedale Bellaria Carlo Alberto Pizzardi, Bologna, Italy
| | - Laurent Spelle
- Department of Interventional Neuroradiology, BICETRE HOSPITAL - APHP, Le Kremlin-Bicetre, France.,Faculty of Medicine, Paris-Saclay University, Le Kremlin-Bicetre, France
| | - Frédéric Clarencon
- Department of Neuroradiology, Hôpital Universitaire Pitié Salpêtrière Service de Neuroradiologie Interventionnelle, Paris, Île-de-France, France
| | - Sergey Yakovlev
- Neuroradiology, Burdenko Neurosurgical Clinic, Moskva, Russian Federation
| | - Peter Keston
- Department of Clinical Neuroscience, NHS Lothian, Edinburgh, UK
| | - Nunzio Paolo Nuzzi
- Neuroradiologia Interventistica, IRCCS Istituto Clinico Humanitas, Rozzano, Lombardia, Italy
| | - Stefanita Dima
- Clinica de Neurochirurgie si Terapie Endovasculara Neurolife, Life Memorial Hospital, Bucharest, Romania
| | - Christina Wendl
- Institut für Röntgendiagnostik, Universitatsklinikum Regensburg, Regensburg, Bayern, Germany
| | | | - Peter Schramm
- Department of Neuroradiology, Universitätsklinikum Schleswig-Holstein Campus Lübeck, Lubeck, Schleswig-Holstein, Germany
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Winters H, Schüngel MS, Scherlach C, Mucha D, Thalwitzer J, Härtig W, Donitza A, Bailis N, Maybaum J, Hoffmann KT, Quäschling U, Schob S. First Experience of Three Neurovascular Centers With the p64MW-HPC, a Low-Profile Flow Diverter Designed for Proximal Cerebral Vessels With Antithrombotic Coating. Front Neurol 2021; 12:724705. [PMID: 34594297 PMCID: PMC8476967 DOI: 10.3389/fneur.2021.724705] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Accepted: 08/12/2021] [Indexed: 12/23/2022] Open
Abstract
Background: In the last decade, flow diversion (FD) has been established as hemodynamic treatment for cerebral aneurysms arising from proximal and distal cerebral arteries. However, two significant limitations remain—the need for 0.027” microcatheters required for delivery of most flow diverting stents (FDS), and long-term dual anti-platelet therapy (DAPT) in order to prevent FDS-associated thromboembolism, at the cost of increasing the risk for hemorrhage. This study reports the experience of three neurovascular centers with the p64MW-HPC, a FDS with anti-thrombotic coating that is implantable via a 0.021” microcatheter. Materials and methods: Three neurovascular centers contributed to this retrospective analysis of patients that had been treated with the p64MW-HPC between March 2020 and March 2021. Clinical data, aneurysm characteristics, and follow-up results, including procedural and post-procedural complications, were recorded. The hemodynamic effect was assessed using the O'Kelly–Marotta Scale (OKM). Results: Thirty-two patients (22 female, mean age 57.1 years) with 33 aneurysms (27 anterior circulation and six posterior circulation) were successfully treated with the p64MW-HPC. In 30/32 patients (93.75%), aneurysmal perfusion was significantly reduced immediately post implantation. Follow-up imaging was available for 23 aneurysms. Delayed aneurysm perfusion (OKM A3: 8.7%), reduction in aneurysm size (OKM B1-3: 26.1%), or sufficient separation from the parent vessel (OKM C1-3 and D1: 65.2%) was demonstrated at the last available follow-up after a mean of 5.9 months. In two cases, device thrombosis after early discontinuation of DAPT occurred. One delayed rupture caused a caroticocavernous fistula. The complications were treated sufficiently and all patients recovered without permanent significant morbidity. Conclusion: Treatment with the p64MW-HPC is safe and feasible and achieves good early aneurysm occlusion rates in the proximal intracranial circulation, which are comparable to those of well-established FDS. Sudden interruption of DAPT in the early post-interventional phase can cause in-stent thrombosis despite the HPC surface modification. Deliverability via the 0.021” microcatheter facilitates treatment in challenging vascular anatomies.
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Affiliation(s)
- Helge Winters
- Institut für Neuroradiologie, Universitätsklinikum Leipzig, Leipzig, Germany.,Klinik und Poliklinik für Anästhesiologie und Intensivtherapie, Universitätsklinikum Leipzig, Leipzig, Germany
| | | | - Cordula Scherlach
- Institut für Neuroradiologie, Universitätsklinikum Leipzig, Leipzig, Germany
| | - Dirk Mucha
- Institut für Radiologie und Neuroradiologie, Heinrich-Braun- Klinikum, Zwickau, Germany
| | - Jörg Thalwitzer
- Institut für Radiologie und Neuroradiologie, Klinikum Chemnitz gGmbH, Chemnitz, Germany
| | - Wolfgang Härtig
- Paul-Flechsig-Institut für Hirnforschung, Universität Leipzig, Leipzig, Germany
| | - Aneta Donitza
- Abteilung für Neuroradiologie, Klinik & Poliklinik für Radiologie, Universitätsklinikum Halle, Halle (Saale), Germany
| | - Nikolaos Bailis
- Institut für Neuroradiologie, Universitätsklinikum Leipzig, Leipzig, Germany
| | - Jens Maybaum
- Institut für Neuroradiologie, Universitätsklinikum Leipzig, Leipzig, Germany
| | - Karl Titus Hoffmann
- Institut für Neuroradiologie, Universitätsklinikum Leipzig, Leipzig, Germany
| | - Ulf Quäschling
- Institut für Neuroradiologie, Universitätsklinikum Leipzig, Leipzig, Germany
| | - Stefan Schob
- Abteilung für Neuroradiologie, Klinik & Poliklinik für Radiologie, Universitätsklinikum Halle, Halle (Saale), Germany
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Hellstern V, Aguilar-Pérez M, Henkes E, Serna-Candel C, Wendl C, Bäzner H, Ganslandt O, Henkes H. Endovascular Treatment of Posterior Circulation Saccular Aneurysms With the p64 Flow Modulation Device: Mid-and Long-Term Results in 54 Aneurysms From a Single Center. Front Neurol 2021; 12:711863. [PMID: 34335461 PMCID: PMC8322946 DOI: 10.3389/fneur.2021.711863] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Accepted: 06/21/2021] [Indexed: 01/21/2023] Open
Abstract
Objective: Flow diverter (FD) stents have become one of the most common tools for treating intracranial aneurysms; however, their role in treating posterior circulation aneurysms is still discussed with controversy. In this study, we evaluated the safety and effectiveness of p64 FD for the treatment of saccular, unruptured aneurysms in the posterior circulation over a long-term follow-up period in a single center. Methods: From our prospectively maintained database, we retrospectively identified patients who underwent treatment of an intracranial saccular aneurysm arising from the posterior circulation with ≥1 p64 FD implanted or attempted between October 2012 and December 2019. Aneurysms could have been treated with prior or concomitant saccular treatment (e.g., coiling, intra-aneurysmal flow diversion). Aneurysms with parent vessel implants other than p64, fusiform aneurysms, and dissections were excluded. Peri- and postprocedural complications, clinical outcome, and clinical and angiographic follow-up results were evaluated. Results: In total, 54 patients (45 female, 9 male; mean age 55.1 years) with 54 intracranial aneurysms met the inclusion criteria. In 51 cases (94.4%), one p64 was implanted; in 2 cases (3.7 %), two p64s were implanted; in one case, deployment of the p64 was not feasible. Procedural complications occurred in 3.7% and postprocedural complications in 9.3 %, respectively. Hemorrhagic complications occurred in 2/54 patients (3.7%), thereof one fatal parenchymal hemorrhage. Ischemic complications were observed in 5/54 patients (9.3%). Early, mid-term, and long-term angiographic follow-up examinations showed complete or near-complete aneurysm occlusion, defined according to the O'Kelly -Marotta (OKM) scale as OKM C + D in 56, 75.6, and 82.9 %, respectively. Asymptomatic side vessel occlusions occurred in 3.8%, each during the first follow-up. Conclusions: The implantation of a p64 FD is a safe and effective device for endovascular treatment of posterior circulation saccular aneurysms with a high success rate and low morbi-mortality.
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Affiliation(s)
- Victoria Hellstern
- Neuroradiologische Klinik, Kopf- und Neurozentrum, Klinikum Stuttgart, Stuttgart, Germany
| | - Marta Aguilar-Pérez
- Neuroradiologische Klinik, Kopf- und Neurozentrum, Klinikum Stuttgart, Stuttgart, Germany
| | - Elina Henkes
- Neuroradiologische Klinik, Kopf- und Neurozentrum, Klinikum Stuttgart, Stuttgart, Germany
| | - Carmen Serna-Candel
- Neuroradiologische Klinik, Kopf- und Neurozentrum, Klinikum Stuttgart, Stuttgart, Germany
| | - Christina Wendl
- Institut für Röntgendiagnostik, Zentrum für Neuroradiologie, Universitätsklinikum Regensburg, Regensburg, Germany
| | - Hansjörg Bäzner
- Neurologische Klinik, Neurozentrum, Klinikum Stuttgart, Stuttgart, Germany
| | - Oliver Ganslandt
- Neurochirurgische Klinik, Neurozentrum, Klinikum Stuttgart, Stuttgart, Germany
| | - Hans Henkes
- Neuroradiologische Klinik, Kopf- und Neurozentrum, Klinikum Stuttgart, Stuttgart, Germany.,Medizinische Fakultät der Universität Duisburg-Essen, Essen, Germany
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Maybaum J, Henkes H, Aguilar-Pérez M, Hellstern V, Gihr GA, Härtig W, Reisberg A, Mucha D, Schüngel MS, Brill R, Quäschling U, Hoffmann KT, Schob S. Flow Diversion for Reconstruction of Intradural Vertebral Artery Dissecting Aneurysms Causing Subarachnoid Hemorrhage-A Retrospective Study From Four Neurovascular Centers. Front Neurol 2021; 12:700164. [PMID: 34276549 PMCID: PMC8280292 DOI: 10.3389/fneur.2021.700164] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2021] [Accepted: 05/17/2021] [Indexed: 12/20/2022] Open
Abstract
Objective: Dissecting aneurysms (DAs) of the vertebrobasilar territory manifesting with subarachnoid hemorrhage (SAH) are associated with significant morbi-mortality, especially in the case of re-hemorrhage. Sufficient reconstruction of the affected vessel is paramount, in particular, if a dominant vertebral artery (VA) is impacted. Reconstructive options include stent-assisted coiling and flow diversion (FD). The latter is technically less challenging and does not require catheterization of the fragile aneurysm. Our study aims to report a multicentric experience with FD for reconstruction of DA in acute SAH. Materials and Methods: This retrospective study investigated 31 patients (age: 30–78 years, mean 55.5 years) who had suffered from SAH due to a DA of the dominant VA. The patients were treated between 2010 and 2020 in one of the following German neurovascular centers: University Hospital Leipzig, Katharinenhospital Stuttgart, BG Hospital Bergmannstrost Halle/Saale, and Heinrich-Braun-Klinikum Zwickau. Clinical history, imaging, implanted devices, and outcomes were reviewed for the study. Results: Reconstruction with flow-diverting stents was performed in all cases. The p64 was implanted in 14 patients; one of them required an additional balloon-expandable stent to reconstruct severe stenosis in the target segment. One case demanded additional liquid embolization after procedural rupture, and in one case, p64 was combined with a PED. Further 13 patients were treated exclusively with the PED. The p48MW-HPC was used in two patients, one in combination with two additional Silk Vista Baby (SVB). Moreover, one patient was treated with a single SVB, one with a SILK+. Six patients died [Glasgow Outcome Scale (GOS) 1]. Causes of death were periprocedural re-hemorrhage, thrombotic occlusion of the main pulmonary artery, and delayed parenchymal hemorrhage. The remaining three patients died in the acute–subacute phase related to the severity of the initial hemorrhage and associated comorbidities. One patient became apallic (GOS 2), whereas two patients had severe disability (GOS 3) and four had moderate disability (GOS 4). Eighteen patients showed a complete recovery (GOS 5). Conclusion: Reconstruction of VA-DA in acute SAH with flow-diverting stents is a promising approach. However, the severity of the condition is reflected by high overall morbi-mortality, even despite technically successful endovascular treatment.
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Affiliation(s)
- Jens Maybaum
- Institute of Neuroradiology, University Hospital Leipzig, Leipzig, Germany
| | - Hans Henkes
- Neuroradiological Clinic, Katharinenhospital Stuttgart, Stuttgart, Germany
| | | | - Victoria Hellstern
- Neuroradiological Clinic, Katharinenhospital Stuttgart, Stuttgart, Germany
| | | | - Wolfgang Härtig
- Paul Flechsig Institute for Brain Research, University of Leipzig, Leipzig, Germany
| | - André Reisberg
- Department of Diagnostic Imaging and Interventional Radiology, Bergbau-Berufsgenossenschaft Hospital Bergmannstrost Halle, Halle, Germany
| | - Dirk Mucha
- Department of Radiology, Interventional Radiology and Neuroradiology, Heinrich-Braun-Klinikum, Zwickau, Germany
| | | | - Richard Brill
- Department of Neuroradiology, Radiology and Policlinic of Radiology, University Hospital Halle (Saale), Halle, Germany
| | - Ulf Quäschling
- Institute of Neuroradiology, University Hospital Leipzig, Leipzig, Germany
| | | | - Stefan Schob
- Department of Neuroradiology, Radiology and Policlinic of Radiology, University Hospital Halle (Saale), Halle, Germany
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