脳底動脈閉塞症における血流コンピューテッドトモグラフィー灌流定義虚血コアによる血栓回収後の機能予後の予測
Pengjun Chen1, Xia Li1, Yechao Huang1
1Zhejiang Key Laboratory of Imaging and Interventional Medicine, The Fifth Affiliated Hospital of Wenzhou Medical University, Lishui Hospital of Zhejiang University, Lishui, China.
Frontiers in neurology
|December 25, 2025
まとめ
脳底動脈閉塞症(BAO)患者における血流コンピューテッドトモグラフィー灌流(CTP)定義虚血コアの最適な閾値は機能予後を予測する。脳血流(CBF)< 10 mL/100 g/分という閾値が、血管内血栓回収療法後の良好な転帰を最もよく予測する。
背景:
- 脳底動脈閉塞症(BAO)は虚血性脳卒中の重症型である。
- 虚血コア容積の正確な評価は、治療方針決定に不可欠である。
- コンピューテッドトモグラフィー灌流(CTP)画像は、梗塞サイズの推定に広く用いられている。
研究 の 目的:
- BAO患者におけるCTP定義虚血コアの最適な閾値を決定すること。
- 血管内血栓回収療法後の機能予後を最もよく予測するCTPパラメータを特定すること。
- 後部循環Alberta Stroke Program Early CT Score(pc-ASPECTS)のBAOにおける有用性を評価すること。
主な方法:
- 血管内血栓回収療法を受けたBAO患者85例の後ろ向き解析。
- 脳血流(CBF)、脳血流量(CBV)、および最大時間(Tmax)の閾値を用いたCTPによる虚血コア推定。
- 90日後の修正ランキン尺度(mRS)による機能予後評価。
- pc-ASPECTSは半定量化された。
主要な成果:
- 39例(45.9%)が良好な機能予後(mRS 0-3)を達成した。
- CBF < 10 mL/100 g/分閾値(Syngo.via)は、容積およびpc-ASPECTS推定と組み合わせて、最良の予測性能(AUC 0.86-0.87)を示した。
- 最適カットオフ値は、容積で≤ 2.2、pc-ASPECTSで≥ 7であった。
結論:
- BAO患者において、CBF < 10 mL/100 g/分を用いたCTP定義虚血コアは、再開通後の機能予後の強力な予測因子である。
- コア容積とpc-ASPECTSの組み合わせは、堅牢な予後情報を提供する。
- このアプローチは、BAO後の治療選択の最適化と回復の予測に役立つ。
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