{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,25]],"date-time":"2026-09-25T17:35:07Z","timestamp":1790357707712,"version":"4.1.0"},"reference-count":13,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"9","content-domain":{"domain":["www.ahajournals.org"],"crossmark-restriction":true},"short-container-title":["Stroke"],"published-print":{"date-parts":[[2018,9]]},"abstract":"<jats:sec>\n                    <jats:title>Background and Purpose\u2014<\/jats:title>\n                    <jats:p>Stent retriever (SR) thrombectomy has become the mainstay of treatment of acute intracranial large artery occlusion. However, it is still not much known about the optimal limit of SR attempts for favorable outcome. We evaluated whether a specific number of SR passes for futile recanalization can be determined.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods\u2014<\/jats:title>\n                    <jats:p>Patients who were treated with a SR as the first endovascular modality for their intracranial large artery occlusion in anterior circulation were retrospectively reviewed. The recanalization rate for each SR pass was calculated. The association between the number of SR passes and a patient\u2019s functional outcome was analyzed.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results\u2014<\/jats:title>\n                    <jats:p>\n                      A total of 467 patients were included. Successful recanalization by SR alone was achieved in 82.2% of patients. Recanalization rates got sequentially lower as the number of passes increased, and the recanalization rate achievable by \u22655 passes of the SR was 5.5%. In a multivariable analysis, functional outcomes were more favorable in patients with 1 to 4 passes of the SR than in patients without recanalization (odds ratio [OR] was 8.06 for 1 pass; OR 7.78 for 2 passes; OR 6.10 for 3 passes; OR 6.57 for 4 passes; all\n                      <jats:italic>P<\/jats:italic>\n                      &lt;0.001). However, the functional outcomes of patients with \u22655 passes were not significantly more favorable than found among patients without recanalization (OR 1.70 with 95% CI, 0.42\u20136.90 for 5 passes,\n                      <jats:italic>P<\/jats:italic>\n                      =0.455; OR 0.33 with 0.02\u20135.70,\n                      <jats:italic>P<\/jats:italic>\n                      =0.445 for \u22656 passes).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions\u2014<\/jats:title>\n                    <jats:p>The likelihood of successful recanalization got sequentially lower as the number of SR passes increased. Five or more passes of the SR became futile in terms of the recanalization rate and functional outcomes.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1161\/strokeaha.118.021320","type":"journal-article","created":{"date-parts":[[2018,9,4]],"date-time":"2018-09-04T11:56:51Z","timestamp":1536062211000},"page":"2088-2095","update-policy":"https:\/\/doi.org\/10.1161\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":120,"title":["Number of Stent Retriever Passes Associated With Futile Recanalization in Acute Stroke"],"prefix":"10.1161","volume":"49","author":[{"given":"Jang-Hyun","family":"Baek","sequence":"first","affiliation":[{"name":"From the Department of Neurology, National Medical Center, Seoul, Korea (J.-H.B.)"},{"name":"Department of Neurology, Severance Hospital Stroke Center (J.-H.B., J.H.H., H.S.N., Y.D.K., H.P.)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Byung Moon","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Radiology, Severance Hospital Stroke Center (B.M.K., D.J.K.)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ji Hoe","family":"Heo","sequence":"additional","affiliation":[{"name":"Department of Neurology, Severance Hospital Stroke Center (J.-H.B., J.H.H., H.S.N., Y.D.K., H.P.)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hyo Suk","family":"Nam","sequence":"additional","affiliation":[{"name":"Department of Neurology, Severance Hospital Stroke Center (J.-H.B., J.H.H., H.S.N., Y.D.K., H.P.)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Young Dae","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Neurology, Severance Hospital Stroke Center (J.-H.B., J.H.H., H.S.N., Y.D.K., H.P.)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hyungjong","family":"Park","sequence":"additional","affiliation":[{"name":"Department of Neurology, Severance Hospital Stroke Center (J.-H.B., J.H.H., H.S.N., Y.D.K., H.P.)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Oh Young","family":"Bang","sequence":"additional","affiliation":[{"name":"Yonsei University College of Medicine, Seoul, Korea; Departments of Neurology (O.Y.B.)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Joonsang","family":"Yoo","sequence":"additional","affiliation":[{"name":"Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea; Department of Neurology, Keimyung University Dongsan Medical Center, Daegu, Korea (J.Y.)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dong Joon","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Radiology, Severance Hospital Stroke Center (B.M.K., D.J.K.)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pyoung","family":"Jeon","sequence":"additional","affiliation":[{"name":"Radiology (P.J.)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Seung Kug","family":"Baik","sequence":"additional","affiliation":[{"name":"Department of Radiology, Pusan National University Yangsan Hospital, Korea (S.K.B., J.R.)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sang Hyun","family":"Suh","sequence":"additional","affiliation":[{"name":"Department of Radiology, Gangnam Severance Hospital (S.H.S.)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kyung-Yul","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Neurology, Gangnam Severance Hospital (K.-Y.L.)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hyo Sung","family":"Kwak","sequence":"additional","affiliation":[{"name":"Departments of Radiology (H.S.K.)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hong Gee","family":"Roh","sequence":"additional","affiliation":[{"name":"Chonbuk National University Medical School and Hospital, Jeonju, Korea; Departments of Radiology (H.G.R.)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Young-Jun","family":"Lee","sequence":"additional","affiliation":[{"name":"Konkuk University Hospital, Seoul, Korea; Department of Radiology, Hanyang University Hospital, Seoul, Korea (Y.-J.L.)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sang Heum","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Radiology, CHA Bundang Medical Center, CHA University School of Medicine, Seongnam, Korea (S.H.K.)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chang Woo","family":"Ryu","sequence":"additional","affiliation":[{"name":"Department of Radiology, Kyung Hee University Gangdong Hospital, Seoul, Korea (C.W.R.)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yon-Kwon","family":"Ihn","sequence":"additional","affiliation":[{"name":"Department of Radiology, St. Vincent\u2019s Hospital, Catholic University School of Medicine, Suwon, Korea (Y.K.I.)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Byungjun","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Radiology, Korea University Anam Hospital, Seoul (B.K.)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hong-Jun","family":"Jeon","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea (H.J.-J.)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jin Woo","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Radiology, Inje University Ilsan Paik Hospital, Korea (J.W.K.)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jun Soo","family":"Byun","sequence":"additional","affiliation":[{"name":"Department of Radiology, Chung-Ang University Hospital, Seoul, Korea (J.S.B., W.J.L.)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sangil","family":"Suh","sequence":"additional","affiliation":[{"name":"Department of Radiology, Korea University Guro Hospital, Seoul (S.S.)."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jeong Jin","family":"Park","sequence":"additional","affiliation":[{"name":"Neurology (J.J.P.)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Woong Jae","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Radiology, Chung-Ang University Hospital, Seoul, Korea (J.S.B., W.J.L.)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jieun","family":"Roh","sequence":"additional","affiliation":[{"name":"Department of Radiology, Pusan National University Yangsan Hospital, Korea (S.K.B., J.R.)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Byoung-Soo","family":"Shin","sequence":"additional","affiliation":[{"name":"Neurology 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