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目的设计并制作基于婴幼儿心室辅助泵——罗叶泵的体外测试平台,分别完成20 mL婴幼儿罗叶泵的流体性能实验和耐疲劳实验。方法将罗叶泵驱动装置、20 mL婴幼儿罗叶泵、前负荷腔、前负荷压力传感器、后负荷腔、后负荷压力传感器、心电监护器、阻尼器和流量计等按不同的实验目的组装成不同的测试平台,流体温度控制为37℃,分别用来完成20 mL婴幼儿罗叶泵的流体性能实验和耐疲劳实验。结果所制作的流体性能实验平台能较好地模拟人体前后负荷;在固定泵输出压力时,测量了20 mL婴幼儿罗叶泵泵频率与泵前压力(前负荷)、泵后压力(后负荷)和流量的关系;所组装的耐疲劳实验平台能够测试罗叶泵的耐疲劳性能;20 mL婴幼儿罗叶泵在连续搏动70 d后,其形变率仅为4.5%。结论所组装的搏动泵测试平台能测试20 mL婴幼儿罗叶泵的流体性能和耐疲劳性能;所制作的20 mL婴幼儿罗叶泵具有较好的稳定性和耐疲劳性。
Objective To design and manufacture an in vitro testing platform based on infants and young children’s ventricular assist pump-Luoye pump, and to complete the fluid performance test and fatigue test of 20mL infants’ Luoye pump respectively. Methods The lobar pump drive, 20 mL infant lobar pump, front load chamber, front load pressure sensor, rear load chamber, afterload pressure sensor, ECG monitor, damper and flowmeter were tested according to different purposes Assembled into a different test platform, the fluid temperature was controlled at 37 ℃, were used to complete the fluid performance test and fatigue test of 20 mL infants Luo Lo pump. Results The fluid performance experiment platform was able to simulate the load before and after the human body. When the output pressure of the fixed pump was measured, the pump pressure of 20 mL infant lobar pump and the pressure before pump (pre-load) and post-pump pressure ) And the flow rate. The assembled fatigue-resistant experimental platform can test the fatigue resistance of the Loeb pump. The 20 mL infantile Loeb pump has a deformation rate of only 4.5% after 70 days of continuous pulsation. Conclusion The assembled pulsation pump test platform can test the fluidity and fatigue resistance of the 20 mL infant lobar pump. The manufactured 20 mL infant lobar pump has good stability and fatigue resistance.