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Two Cases of Ruptured Blood Blister-like Aneurysm Treated with X-ray Angiography Perfusion(XAP)Analysis Shoichi TANI 1 , Hirotoshi IMAMURA 1 , Katsunori ASAI 2 , Kampei SHIMIZU 3 , Hidemitsu ADACHI 1 , So TOKUNAGA 1 , Takayuki FUNATSU 1 , Mikiya BEPPU 1 , Keita SUZUKI 1 , Hiromasa ADACHI 1 , Tomohiro OKUDA 1 , Yuichi MATSUI 1 , Yasunori YOSHIDA 1 , Shuhei KAWABATA 1 , Ryo AKIYAMA 1 , Kazufumi HORIUCHI 1 , Nobuyuki SAKAI 1 1Department of Neurosurgery, Kobe City Medical Center General Hospital 2Department of Neurosurgery, Osaka University Graduate School of Medicine 3Department of Neurosurgery, Kyoto University Graduate School of Medicine Keyword: X-ray angiography perfusion(XAP)analysis , blood blister-like aneurysm , balloon occlusion test , cerebral blood flow(CBF) , bypass surgery pp.599-606
Published Date 2017/7/10
DOI https://doi.org/10.11477/mf.1436203558
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 Two cases of ruptured blood blister-like internal carotid artery aneurysms for which low flow bypass was sufficient to attain successful treatment of trapping are reported. In the acute stage of rupture, it is troublesome to perform accurate examinations of tolerance to ischemia like balloon occlusion test(BOT)for estimating the required amount of bypass flow. In our cases, X-ray angiography perfusion(XAP)analysis was introduced, which could be performed in a couple dozen seconds without room-to-room transfer of patients, following the ordinary examination of diagnostic digital subtraction angiography. The perfusion index(PI)ratio measured in this analysis is equivalent to the laterality of cerebral blood flow between the right and left hemispheres. The PI ratio of 0.85 approximately corresponds to the mean stump pressure(MSTP)of 40mmHg, on the basis of the correlation diagram between the PI ratio and MSTP(approximate straight line:PI ratio%=0.6×MSTP+60). Even though the PI ratio of the cases was superior to this threshold of tolerance for parent artery occlusion, complementary low flow bypass was added in the acute case for the overwhelming succeeding vasospasm and for securing the flow to peripheral perforators, which resulted in a successful treatment without any ischemic events.


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電子版ISSN 1882-1251 印刷版ISSN 0301-2603 医学書院

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