肺動脈弁置換術における脱細胞化肺同種移植片の20年間の経験
Samir Sarikouch1, Boethig Dietmar1,2, Avsar Murat1
1Department for Cardiothoracic, Transplant, and Vascular Surgery, Hannover Medical School, Germany.
まとめ
脱細胞化肺同種移植片(DPH)は、先天性心疾患に対する肺動脈弁置換術において良好な長期転帰を提供する。しかし、弁機能は20年間で低下するため、脱細胞化技術の向上が示唆される。
科学分野:
- 心臓血管外科; 生体材料科学; 先天性心疾患治療
背景:
- 脱細胞化肺同種移植片(DPH)は、2005年から肺動脈弁置換術に臨床的に使用されている。本研究では、先天性心疾患患者におけるDPHの長期臨床転帰を評価する。
研究 の 目的:
- 肺動脈弁置換術(PVR)におけるDPHの20年間の臨床経験をまとめる。小児および成人先天性心疾患集団におけるDPHの長期有効性と耐久性を評価する。
主な方法:
- 2005年1月から2025年8月までの間にPVRのためにDPHを受けた310人の患者の προοπτική追跡調査。適格基準には、活動性心内膜炎を除外したPVRの標準的な適応が含まれた。生存率および有害事象からの自由率のKaplan-Meier解析を実施した。
主要な成果:
- 20年時点で、死亡からの自由率は96.9%、摘出からの自由率は85.2%、感染症からの自由率は91.0%であった。弁機能は低下を示し、狭窄および中等度の逆流からの自由率は20年までに0%に達した。15年以降の解析に利用可能な患者数は限られていた。
結論:
- DPHは、保存的肺同種移植片と比較して、摘出からの良好な長期自由率を示す。弁機能(狭窄および逆流)の有意な低下が20年間にわたって観察された。残存する免疫原性はDPH機能に影響を与える可能性があり、脱細胞化方法の改善が必要であることを示唆している。
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