To evaluate the safety and validity of microsurgical Gore-Tex clip-wrapping for ruptured blood blister-like aneurysms (BBAs) of the internal carotid artery (ICA). Single-surgeon series. Retrospective study. Data analyzed were patient age, sex, Hunt and Hess grade (H&H), Fisher grade, time from rupture to hospitalization, aneurysm size and location, collateral capacity of the circle of Willis, time from hospitalization to aneurysm repair, aneurysm obliteration, complications, and modified Rankin scale (mRS) at follow-up. Six patients (2 males, 4 females) with ICA BBAs underwent clip-wrapping between 2011 and 2016. Median age was 50.0 years (range 31.7-54.0). H&H was grade 1 or 2 in 5 patients and grade 4 in 1 patient. All aneurysms were small (≤ 0.3 cm), without relation to vessel bifurcations, and located anteromedially, anterolaterally, and superomedially on the ICA trunk. Right side was most frequent (66%). All aneurysms could be clip-wrapped without intraoperative ruptures and all parent arteries could be preserved in the acute phase. Clip-wrapping completely eliminated the BBAs in five patients, whereas one patient underwent additional stent-assisted coiling. There were no re-ruptures, delayed infarctions, or deaths postoperatively. After a median follow-up of 57 months (range 20-90), outcome was favorable (mRS score 0-2) in all patients without radiographic signs of recurrences. Using the Gore-Tex clip-wrapping technique for ruptured ICA BBAs, the aneurysm could be treated without intraoperative ruptures or parent artery sacrifice in the acute phase. The outcomes were similar to other SAH patients and on follow-up, there were no aneurysm recurrences, indicating a durable long-term outcome.

/pdf/clip-wrapping-of-ruptured-blood-blister-like-aneurysms-of-4ohsa3qxnx.pdf

Clip-wrapping of ruptured blood blister-like aneurysms of the internal carotid artery.

Blood blister-like aneurysms (BBAs) are rare and usually appear at nonbranching sites in the supraclinoid portion of the internal carotid artery (ICA). Because it is difficult to obtain histological specimens of the aneurysm wall and because experimental models are challenging to establish, the pathogenesis of BBAs remains uncertain. In this paper, we reviewed the diagnostic, radiological, and pathophysiological characteristics of patients with BBAs. We also summarized the existing evidence and potential mechanisms related to the causes of BBAs. Current evidence indicates that atherosclerosis and dissection are the main prerequisites for the formation of BBAs. Hemodynamics may play a role in the process of BBA formation due to the unique vascular anatomy of the supraclinoid ICA. Further research on histopathology and hemodynamics is warranted in this field.

/pdf/current-knowledge-of-and-perspectives-about-the-pathogenesis-4mz1nfqi8t.pdf

Current Knowledge of and Perspectives about the Pathogenesis of Blood Blister-like Aneurysms of the Internal Carotid Artery: A Review of the Literature.

Stent-assisted Coiling vs. Flow Diverter for Treating Blood Blister-like Aneurysms

Microsuturing Technique for the Treatment of Blood Blister Aneurysms: A Series of 7 Cases.

Despite many therapeutic methods were utilized to treat blood blister-like aneurysms (BBAs), the optimal treatment approach has not yet been defined. This study presents the single center experience with BBAs treated with flow diverter-assisted coiling using semi-deploying technique, and discusses the efficacy and safety of the method. The patients with subarachnoid hemorrhages (SAH) due to BBAs and treated with Pipeline Flex Embolization Device (PED) between November 2015 and February 2019 in our hospital were retrospectively reviewed. Patient demographic data, timing of treatment, angiographic details, treatment techniques, clinical outcomes and follow-up results were recorded. Ten cases (6 women and 4 men) were enrolled. The mean age of patients was 50.7 years (range 40-61 years). The aneurysm size ranged from 2 × 1.7 mm to 4.5 × 3.8 mm. Seven patients were treated with PED assisted coil embolization using semi-deploying technique, and all of the aneurysms were totally obliterated at the follow up. One patient treated with PED assisted coil embolization suffered from parenchymal hemorrhage 3 days after the treatment, and another one patient also treated with PED and coil died of severe vasospasm 10 days after the treatment. There was no reruptured cases during the follow-up. Here we showed that PED assisted coil embolization using semi-deploying technique could be a technically safe and effective treatment for BBAs.

/pdf/flow-diverter-assisted-coil-embolization-of-blood-blister-2154ogqj9m.pdf

Flow Diverter-Assisted Coil Embolization of Blood Blister-Like Aneurysm Using Semi-deploying Technique.

Treatment of Blood Blister-like Aneurysms with Stent-Assisted Coiling: A Retrospective Multicenter Study.

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Treatment of Blood Blister-like Aneurysms with Stent-Assisted Coiling: A Retrospective Multicenter Study.