セグメンテクトミーにおける肺動脈 - 支氣管領域の不一致と,その影響が外科切除の限界に及ぼす影響
Sanae Kuroda1, Tappei Shomoto1, Yuki Nishioka1
1Division of Chest Surgery, Hyogo Cancer Center, 13-70, Kitaoji-cho, Akashi city, Japan.
The Annals of thoracic surgery
|February 21, 2026
まとめ
肺動脈 perfusion (PA) のマージンは,セグメンテクトミーにおける腫瘍距離を過小評価する可能性があります. Bronchial ventilation (B) のマージンはより正確である. セグメント間静脈を分割することで,セグメント切除手術中のマージン充足度が改善されます.
科学分野:
- 胸部外科手術について
- 外科腫瘍学外科腫瘍学
- 肺内医学 肺内医学 肺内医学
背景:
- 正確な切除限界は,セグメンテクトミーの成功に不可欠です.
- 術前CT評価ガイドは,切除線を指します.
- 術内インドシアニン緑色 (ICG) 光は肺動脈 (PA) perfusion に依存し,常に支氣管 (B) 換気と一致しない.
研究 の 目的:
- セグメンテクトミーにおけるPAとB領域の不一致を定量的に評価する.
- これらの領域と病理学的限界との関係を評価する.
- マージン充足度に対するセグメント間静脈分裂の影響を決定する.
主な方法:
- アナトミックセグメンテクトミー265件を遡及的に分析した.
- セグメンタルボリューム (PA vs. B) を計算するための3DCT再構築.
- 腫瘍から境界までの距離の測定 (PA-マージン,B-マージン,経路マージン).
主要な成果:
- PAの領土はBの領土よりもわずかに小さかった.
- PA-マージンは,B-マージンとパス-マージンよりも大幅に短かった.
- セグメント間静脈分裂は経路/PAマージン比率を増加させ,充足性の改善を示した.
結論:
- PA-マージンだけでは,セグメンテクトミー中の腫瘍の近接を過小評価する可能性があります.
- ICGで区切られた線を超えて切除することを推奨します.
- 断片間静脈分裂は,ICGの限界が腫瘍に近い場合に,貴重な手術内技術です.
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