超音波乳化による僧帽弁輪石灰化(MAC)を伴う僧帽弁修復の促進
Mathieu Rheault-Henry1, Mohsyn Imran Malik1, Nitish Bhatt1
1Division of Cardiac Surgery, Department of Surgery, Western University, London, ON, Canada.
Annals of cardiothoracic surgery
|December 12, 2025
まとめ
超音波乳化は、僧帽弁輪石灰化(MAC)患者の僧帽弁修復を安全かつ効果的に支援し、高い成功率を達成し、修復の選択肢を広げる。
科学分野:
- 心臓血管外科;医療機器;再生医療
背景:
- 僧帽弁輪石灰化(MAC)は僧帽弁手術を複雑にし、しばしば修復を不可能にする。MAC患者における僧帽弁修復の実現可能性を改善するためには新規技術が必要である。
研究 の 目的:
- 中等度から重度のMAC患者における僧帽弁修復のための超音波乳化および吸引の使用の初期転帰を評価すること。この新規デバイス支援脱灰技術の安全性と有効性を評価すること。
主な方法:
- 中等度から重度のMACおよび僧帽弁逆流(MR)を有する27例の患者に対し、Sonopet支援脱灰および修復を実施した。手術は胸骨切開または小開胸術により行われ、MAC除去および輪郭形成のために超音波吸引を利用した。主要転帰には修復成功および残存MRが含まれ、副次的転帰には死亡率および周術期合併症が含まれた。
主要な成果:
- 僧帽弁修復は96.3%の患者で成功し、入院中の死亡または脳卒中は認められなかった。退院時の残存MRは0または軽度が96.3%であった。術後合併症には、新規発症の心房細動(18.5%)および恒久的ペースメーカー植込み(7.4%)が含まれた。
結論:
- 超音波乳化は、中等度から重度のMACにおける僧帽弁修復の安全かつ効果的な補助である。この技術は精密な脱灰を促進し、高い修復率と最小限の合併症につながる。このアプローチは僧帽弁修復の適格性を広げる可能性があり、さらなる調査に値する。
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