Outflow monitoring of a pneumatic ventricular assist device using external pressure sensors
Outflow monitoring of a pneumatic ventricular assist device using external pressure sensors
复制标题
使用外部压力传感器监测气动心室辅助装置的流出量
DOI：
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复制
发表时间：
2016
影响因子：
3.9
通讯作者：
S. Choi
中科院分区：
文献类型：
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作者：
S. Kang;Keun Her;S. Choi
背景在这项研究中，一个新的算法来估计泵流出的气动心室辅助装置（p-VAD）。根据理想气体方程推导出p-VAD的泵流出量估计算法，并利用两个外部压力传感器确定p-VAD的血囊体积变化。目的在体外实验的基础上，对该算法进行修正，以考虑植入单元、空气动力系统以及传感器与植入单元之间的压力差引起的结构顺应性的影响。将p-VAD连接到三头小牛（70-100 kg）的左心室和降主动脉。使用新算法估计它们的流出量，并与使用超声血流计（UBF）（TS-410，Transonic Systems Inc.，结果估计值与实测值的Pearson相关系数为0.864。压力传感器安装在外部控制器上，并与外部致动器连接在同一侧的空气传动系统上，这使得传感器易于管理。
BackgroundIn this study, a new algorithm was developed for estimating the pump outflow of a pneumatic ventricular assist device (p-VAD). The pump outflow estimation algorithm was derived from the ideal gas equation and determined the change in blood-sac volume of a p-VAD using two external pressure sensors.ObjectivesBased on in vitro experiments, the algorithm was revised to consider the effects of structural compliance caused by volume changes in an implanted unit, an air driveline, and the pressure difference between the sensors and the implanted unit.MethodsIn animal experiments, p-VADs were connected to the left ventricles and the descending aorta of three calves (70–100 kg). Their outflows were estimated using the new algorithm and compared to the results obtained using an ultrasonic blood flow meter (UBF) (TS-410, Transonic Systems Inc., Ithaca, NY, USA).ResultsThe estimated and measured values had a Pearson’s correlation coefficient of 0.864. The pressure sensors were installed at the external controller and connected to the air driveline on the same side as the external actuator, which made the sensors easy to manage.
影响因子：
158.5
作者：
Rose, EA;Gelijns, AC;Meier, P
通讯作者：
Meier, P