在无节拍中减少临床前心脏穿孔:对Micra无节拍器输送系统的更新
Paul R Roberts1, Christophe Garweg2, Arthur M Yue1
1University Hospital Southampton NHS Foundation Trust, Southampton, UK.
Pacing and clinical electrophysiology : PACE
|July 10, 2023
概括
更新的Micra输送导管设计减少了组织应激和穿孔风险. 这项临床前研究显示,性能得到改善,可能降低无心脏起器植入过程中的并发症.
科学领域:
- 心血管设备工程是什么意思?
- 医疗器械安全 医疗器械安全
- 生物医学模拟技术
背景情况:
- 无心脏起器为输血系统提供了替代方案,旨在减少相关并发症.
- 在无心脏起器植入过程中,心周溢液是一种罕见的并发症,可能是由于输送导管穿孔.
- 本研究评估了更新的Micra输送导管设计的临床前穿孔性能.
研究的目的:
- 评估更新的Micra输送导管的临床前穿孔性能.
- 量化与组织应力和穿孔抵抗有关的导管尖设计的改进.
- 估计更新的导管设计对穿孔事件的潜在临床影响.
主要方法:
- 有限元分析 (FEA) 建模用于估计导管置期间的组织应力.
- 使用绵羊腹腔组织进行长板穿孔测试,以比较原始和更新的导管.
- 蒙特卡洛模拟集成人体尸体植入力和组织特性来预测临床性能.
主要成果:
- 随着更新的导管,FEA发现目标组织应激减少了66%.
- 基板测试显示,更新的导管需要20%更多的力来穿孔猪腹腔组织 (p=0.01).
- 蒙特卡洛模拟预测,随着更新的设计,导管穿孔病例减少了28.5%.
结论:
- 更新的Micra导管尖端,增加了表面积和圆形,显著提高了临床前穿孔性能.
- 计算机建模和测试实验支持更新的导管的安全性.
- 建议通过注册表数据进行进一步评估,以确认这些设计修改的临床影响.
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