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在导电系统中评估扭矩转移步调:开发和评估一个ex vivo模型
Darius Chapman1, Fraser Morgan2, Kathryn D Tiver3
1College of Medicine and Public Health, Flinders University, Adelaide, Australia; Medical Device Research Institute, Flinders University, Adelaide, Australia.
JACC. Clinical electrophysiology
|January 11, 2024
概括
与输入转相比,导电系统的节奏线索显示了螺旋旋转的减少,在部署过程中频繁,意想不到的扭矩变化. 这凸显了改善设计和植入技术的必要性,以提高安全性和效率.
科学领域:
- 心血管设备工程是什么意思?
- 生物医学工程 生物医学工程
- 电力生理学 电力生理学
背景情况:
- 导电系统步调 (CSP) 的部署受到与组织相互作用的阻碍,导致内心纠和防止适当的插入等问题.
- 需要一个经过验证的ex vivo模型来定量分析植入过程中CSP尖行为和心脏组织之间的关系.
研究的目的:
- 在插入过程中量化描述四个常用的CSP线索在尖与组织接口的响应.
- 为了评估不同CSP引线设计的螺旋旋转效率和扭矩动力学.
主要方法:
- 四个CSP线索 (Abbott,波士顿科学,Biotronik,Medtronic) 在使用定制旋转机的羊右心室隔膜模型中进行了试验.
- 螺旋旋转效率通过执行15个转来测量,通过高分辨率摄影每90度记录组织接口变化.
- 分析了响应曲线,使用逐段线性回归来确定输入与输出旋转斜率,并确定扭矩断点事件.
主要成果:
- 所有测试的导线均表现出螺旋旋转率始终低于输入旋转,比率从0.21:1 (Abbott,Medtronic) 到0.56:1 (波士顿科学) 之间.
- 扭矩断点事件发生频繁,平均每次插入所有导线的7.22次.
- 在所有插入的57.8%中观察到不受控制的扭矩断点事件,表明意想不到的过度螺旋旋转.
结论:
- 该研究表明,在CSP插入过程中,使用一种新型的ex vivo模型,螺旋旋转回应和频繁的扭矩变化发生了变化.
- 频繁,意想不到的扭矩断点事件在CSP植入过程中对临床医生构成重大挑战.
- 研究结果表明,需要创新的设计和部署策略,以提高传导系统节奏的效率和安全性.
相关概念视频
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