Sakhaeimanesh A A, Morsi Y S
Ministry of Culture and Higher Education of Iran, Tehran, Iran.
J Med Eng Technol. 1999 Mar-Apr;23(2):63-8. doi: 10.1080/030919099294302.
The work reported here is related to the hydrodynamic performance of a Jellyfish valve and St Vincent valve in terms of total energy losses, mean systolic pressure drop and regurgitation. The in vitro experimental investigation was conducted at cardiac outputs of 3.5, 4.5 and 6.51 min-1 across the two valves and under pulsatile flow condition. It was found that the closure volume of the St Vincent valve was about 2.5 times higher than that of the Jellyfish valve. The total back flow losses on the other hand were found to be in the range of 36.5 to 107.1 and 85.5 to 192.5 mJ for the Jellyfish valve and St Vincent valve respectively. Moreover, the mean systolic pressure drop of the St Vincent valve was found to be higher than that of the Jellyfish valve. However, for all the operating conditions tested here, the Jellyfish valve showed superior hydrodynamic performance in terms of backflow and mean systolic pressure as well as energy losses.
本文所报告的工作涉及水母瓣和圣文森特瓣在总能量损失、平均收缩压降和反流方面的流体动力学性能。在脉动流条件下，对这两种瓣膜在心输出量为3.5、4.5和6.5升/分钟时进行了体外实验研究。结果发现，圣文森特瓣的关闭容积约为水母瓣的2.5倍。另一方面，水母瓣和圣文森特瓣的总回流损失分别在36.5至107.1毫焦和85.5至192.5毫焦范围内。此外，还发现圣文森特瓣的平均收缩压降高于水母瓣。然而，对于此处测试的所有操作条件，水母瓣在回流、平均收缩压以及能量损失方面均表现出卓越的流体动力学性能。
