国产新型叶轮泵的体外测试

在体外模拟测试台上测试新型国产叶轮泵的血流动力学特性，以便指导动物实验乃至临床应用。在一定的前负荷下，通过改变叶轮泵流入道，流出道内径及后负荷，测定在７５％的满负荷工作条件下泵的入口压、泵压、泵流量及相关血流动力学参数。结果表明：当所有管道内径为８ｍｍ，平均后负荷６０ｍｍＨｇ（１ｍｍＨｇ＝０．１３３ｋＰａ）时，泵流量为５．３２Ｌ／ｍｉｎ。后负荷９０ｍｍＨｇ时，用临床常用内径管道测试，泵流量大于１．

In Vitro Testing of a New Implantable Ventricular Assist Rotary Pump Made in China

We have measured the hemodynamic properties of the rotary pump in order to give directions for use in animal test and even in clinical application. In our mocking circulation circuit, under definite preload,the inner diameter of inlet and outlet cannulae and the afterload have been changed for measuring the pressure of input and output of the pump and the pump flowing rate when it runs under 75% maxim working condition. The results demonstrate that with the cannulae of inner diameter of 8 mm as drainage, the pump provides 5.32 L/min of output aganist a mean afterload of average 60 mmHg(1mmHg=0.133kPa) with a filling pressure of 10 mmHg. With the cannulae usually used in clinical setting, the flowing rates are more than 1.5 L/min against a mean afterload of 90 mmHg, and all output pressure of the pump is higher than 120 mmHg. In conclusion, the volume of the rotary pump is small, the needed power is low, and the hemodynamic parameters are suitable for animal test and even for clinical use.