Comparative in vitro study of bileaflet and tilting disk valve behavior in the pulmonary position.
Comparative in vitro study of bileaflet and tilting disk valve behavior in the pulmonary position.
复制标题
双叶和倾斜盘瓣膜在肺位置行为的体外比较研究。
DOI：
10.1115/1.2206204
复制
发表时间：
2006
期刊：
影响因子：
--
通讯作者：
McQuinn,Tim
中科院分区：
文献类型：
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作者：
Gohean,Jeffrey;Figliola,Richard;Camp,Tiffany;McQuinn,Tim
据报道，针对 St. Jude Medical 双叶 (SJMB) 瓣膜和 MedicalCV Omnicarbon (OTD) 倾斜盘瓣膜，研究了肺位置机械心脏瓣膜行为与肺血管阻力的函数关系。测试是在肺模拟循环系统中进行的，阻抗根据系统肺血管阻力（PVR）而变化。使用瞬时肺动脉压力和流速曲线找到阻抗谱。两个阀门在标称 PVR 或以上时完全打开和关闭。 SJMB 瓣膜在关闭时容易发生小叶弹跳，但在高于和低于该标称设置的设置下则完全关闭。在等于或低于 PVR 值时，SJMB 瓣膜表现出两种类型的小叶异常行为：单个小叶仅闭合，而另一个小叶颤动，以及不完全闭合，其中两个小叶颤动但均未保持完全关闭。 OTD阀完全打开并关闭至PVR值。在较低的值下，阀门不会关闭。为左心设计的瓣膜在正常情况下可能会像肺动脉瓣一样表现出异常行为。
A study of mechanical heart valve behavior in the pulmonary position as a function of pulmonary vascular resistance is reported for the St. Jude Medical bileaflet (SJMB) valve and the MedicalCV Omnicarbon (OTD) tilting disk valve. Tests were conducted in a pulmonic mock circulatory system and impedance was varied in terms of system pulmonary vascular resistance (PVR). An impedance spectrum was found using instantaneous pulmonary artery pressure and flow rate curves. Both valves fully opened and closed at and above a nominal PVR of. The SJMB valve was prone to leaflet bounce at closure, but otherwise completely closed, at settings above and below this nominal setting. At PVR values at and below, the SJMB valve exhibited two types of leaflet aberrant behavior: single leaflet only closure while the other leaflet fluttered, and incomplete closure where both leaflets flutter but neither remain fully closed. The OTD valve fully opened and closed to a PVR value of. At lower values, the valve did not close. Valves designed for the left heart can show aberrant behavior under normal conditions as pulmonary valves.