安全な肝切除のための最小将来肝残存容量の確立
John A Steinharter1, Joanne Chou2, Crisanta H Ilagan1,3
1Hepatopancreatobiliary Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY.
Journal of the American College of Surgeons
|January 27, 2026
まとめ
適切な将来肝残存容量(FLRV%)は、術後肝不全(PHLF)の軽減に不可欠です。安全なFLRV%閾値は肝臓の質によって異なり、正常肝では30%以上、機能低下肝では50%以上であり、PHLF関連の罹患率に影響します。
科学分野:
- 肝胆道外科
- 外科腫瘍学
- 肝移植
背景:
- 術後肝不全(PHLF)は、主要な肝臓切除後の重要なリスクである。
- 適切な将来肝残存容量(FLRV%)は、PHLFを予防するための重要な要因である。
- 安全なFLRV%閾値を決定することは、患者の転帰にとって極めて重要である。
研究 の 目的:
- 重度(グレード4/5)の罹患率とFLRV%との関連を評価すること。
- 肝切除後のPHLF関連およびPHLF非関連の主要な罹患率の両方を予防するための安全なFLRV%閾値を特定すること。
主な方法:
- 悪性腫瘍に対する主要肝切除術を受けた1,748人の患者の後ろ向き分析(2000-2020年)。
- FLRV%、罹患率のグレーディング、および罹患率の原因(PHLF関連対PHLF非関連)の評価。
- 患者を正常肝(NL)および機能低下肝(IL)グループに層別化し、閾値検証のためにデータをトレーニングおよびテストコホートに分割した。
主要な成果:
- FLRV%とグレード4/5のPHLF関連罹患率との間に有意な逆相関が見られた(10%増加あたり0.61、p=0.002)。
- FLRV%とPHLF非関連のグレード4/5罹患率との間には有意な関連は観察されなかった(0.95、p=0.65)。
- 安全な最小FLRV%閾値が確立された:正常肝(NL)では30%以上、機能低下肝(IL)では50%以上。
結論:
- FLRV%はPHLF関連罹患率と強く相関しており、肝残存質の重要性を強調している。
- 安全な切除限界は肝臓の質に依存し、機能低下肝ではより高い閾値が必要である。
- 重度の罹患率の約50%はPHLFとは無関係であり、FLRV%の影響を受けなかった。
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