{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,6]],"date-time":"2026-06-06T20:52:24Z","timestamp":1780779144198,"version":"3.54.1"},"reference-count":29,"publisher":"Scientific Scholar","content-domain":{"domain":["surgicalneurologyint.com"],"crossmark-restriction":true},"short-container-title":[],"abstract":"\nBackground:<\/jats:title>\nMechanical thrombectomy has improved the outcome of patients with acute ischemic stroke, but complications such as subarachnoid hemorrhage (SAH) can worsen the prognosis. This study investigates the frictional forces exerted by stent retrievers (SRs) on vessel walls, hypothesizing that these forces contribute to vascular stress and a risk of hemorrhage. We aimed to understand how vessel diameter, curvature, and stent deployment position influence these forces.<\/jats:p>\n<\/jats:sec>\n\nMethods:<\/jats:title>\nUsing a silicone vascular model simulating the middle cerebral artery, we created virtual vessels with diameters of 2.0 mm and 2.5 mm, each with branching angles of 60\u00b0 and 120\u00b0. A Trevo NXT (4 \u00d7 28 mm) SR was deployed and retracted through these models, measuring the maximum static frictional force at the moment the SR began to move. The stent deployment position relative to the curvature (straight, distal 1\/4, center, and proximal 1\/4) was also varied to assess its impact on frictional forces. Each condition was tested 15 times, and the results were statistically analyzed.<\/jats:p>\n<\/jats:sec>\n\nResults:<\/jats:title>\nThe highest frictional force was observed in the 2.0 mm\/120\u00b0 model, followed by the 2.0 mm\/60\u00b0, 2.5 mm\/120\u00b0, and 2.5 mm\/60\u00b0 models. Narrower and more sharply curved vessels exhibited significantly higher frictional forces. Friction also increased with more distal stent deployment, particularly in the narrower vessels.<\/jats:p>\n<\/jats:sec>\n\nConclusion:<\/jats:title>\nSmaller vessel diameters, greater curvature, and more distal stent deployment positions increase frictional forces during thrombectomy, potentially leading to SAH. These findings highlight the importance of selecting appropriately sized SRs and considering stent deployment positions to minimize vascular stress.<\/jats:p>\n<\/jats:sec>","DOI":"10.25259\/sni_709_2024","type":"journal-article","created":{"date-parts":[[2024,10,25]],"date-time":"2024-10-25T09:25:46Z","timestamp":1729848346000},"page":"384","update-policy":"https:\/\/doi.org\/10.25259\/crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Frictional forces in stent retriever procedures: The impact of vessel diameter, angulation, and deployment position"],"prefix":"10.25259","volume":"15","author":[{"given":"Kazuma","family":"Tsuto","sequence":"first","affiliation":[{"name":"Department of Neurosurgery, Toho University Graduate School of Medicine, Meguroku, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Masataka","family":"Takeuchi","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Seisho Hospital, Odawara, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yu","family":"Shimizu","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Seisho Hospital, Odawara, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Takashi","family":"Matsumoto","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Seisho Hospital, Odawara, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Satoshi","family":"Iwabuchi","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Toho University Ohashi Medical Center, Meguroku, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"10894","published-online":{"date-parts":[[2024,10,25]]},"reference":[{"key":"10.25259\/SNI_709_2024\/ref-1","doi-asserted-by":"crossref","first-page":"e792","DOI":"10.1016\/j.wneu.2020.04.159","article-title":"Increased rate of successful first passage recanalization during mechanical thrombectomy for 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