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TEVARとEVARにおける透視時間と放射線被曝:系統的レビューとメタアナリシス
Fotios O Efthymiou1, Christos F Pitros2, Constantine N Antonopoulos2
1Department of Medical Physics, School of Medicine, University of Patras, 26504 Patras, Greece.
Annals of vascular surgery
|January 15, 2026
まとめ
この研究では、胸部血管内治療(TEVAR)は腹部血管内治療(EVAR)よりも透視時間が短いことがわかりました。しかし、カーマ面積積(KAP)などの放射線線量は同等であり、血管内治療における複雑な放射線被曝要因が強調されています。
背景:
- 電離放射線は血管内手術における既知のリスクです。
- 患者の放射線被曝は、異なる血管内治療間で大きく異なります。
研究 の 目的:
- EVARおよびTEVAR中の患者の放射線被曝に関する系統的レビューおよびメタアナリシスを実施すること。
- EVARとTEVAR間の透視時間(FT)、カーマ面積積(KAP)、および累積空気カーマ(CAK)を比較すること。
主な方法:
- 2015年6月から2025年6月まで、主要なデータベース(MEDLINE、Scopus、Cochrane Library)でPRISMAに準拠した文献検索を実施しました。
- FT、KAP、またはCAKを報告した78の研究(EVAR 73、TEVAR 5)で、患者数が20人以上含まれていました。
- プールされた分析にはランダム効果モデルを使用し、バイアスのリスクと出版バイアスを評価しました。
主要な成果:
- TEVARはEVARと比較して有意に短いFT(15.25分)を示しました(p<0.001)。
- KAP(151.08 vs. 147.46 Gycm²; p=0.970)またはCAK(804.92 vs. 1091.03 mGy; p=0.090)に有意差は見られませんでした。
- 高い異質性(I²>85%)が観察されました。
- 研究の11.5%のみがALARAコンプライアンスを報告し、フュージョンイメージングの使用はまれでした(9%)。
結論:
- EVARおよびTEVAR中の放射線被曝は可変であり、解剖学的構造、技術、および実践の影響を受けます。
- TEVARはFTが短いですが、胸部撮像ジオメトリにより、KAP値はEVARと比較して同等またはそれ以上になる可能性があります。
- TEVARに関するデータが限られているため、決定的な比較結論には限界があります。
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