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雑誌文献

Neurological Surgery 脳神経外科46巻3号

2018年03月発行

文献概要

研究

簡便で単一のソフトウェアによる未破裂脳動脈瘤のCFD解析—術前に動脈瘤壁の菲薄化を予測できるか?

著者: 堀恵美子1 梅村公子1 堀聡1 岡本宗司1 柴田孝1 久保道也1 堀江幸男1 高正圭2 柏崎大奈2 黒田敏2

所属機関: 1済生会富山病院脳神経外科 2富山大学医学部脳神経外科

ページ範囲:P.199 - P.206

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Ⅰ.はじめに
 脳動脈瘤破裂によるくも膜下出血(subarachnoid hemorrhage:SAH)は,現在においても予後不良となる患者が少なくない20).そのため,未破裂脳動脈瘤の破裂予防は極めて重要である9,31).一方,近年の多施設共同研究UCAS-Japanなどによって,日本人の脳動脈瘤の破裂リスクが明らかとなりつつあり28),脳動脈瘤の局在,サイズなどがそのリスクを決定することが判明している.しかし,直径3mm未満の極めて小さな脳動脈瘤も少なからず破裂することが広く知られており17,29),今後,未破裂脳動脈瘤の破裂リスクを評価する際には脳動脈瘤壁の厚さ13)など,新たなバイオマーカーが重要な因子になると考えられている5)
 近年,動脈瘤内の血行動態を解析する目的でcomputational fluid dynamics(CFD)が広く利用されつつあり,瘤内のずり応力(wall shear stress:WSS)や圧(pressure)などの因子が動脈瘤の破裂に関与していることが判明しつつある.しかし,その解析には,複数のソフトウェアを用いて多段階の操作や長時間の計算を要するため,未だに限られた施設で研究用として採用されているのが現状であり,一般臨床で個々の症例に利用するほど普及していない点で課題を残している4,22,24,27)
 今回われわれは,CFDのために必要な機能をすべて包含した単一のソフトウェアを用いて,未破裂脳動脈瘤の血行動態を脳動脈瘤頚部クリッピング術の前に解析して,その解析結果が動脈瘤壁の厚さを予測することが可能かどうかを術中に比較検討したので,報告する.

参考文献

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掲載誌情報

出版社:株式会社医学書院

電子版ISSN:1882-1251

印刷版ISSN:0301-2603

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