Construction of Cardiovascular System Experimental Simulation Platform and Research on Flow Change

Abstract

The traditional Windkessel model cannot well explain how only a 1W multi-power heart overcomes various obstructions and viscous dissipation of the circulatory system, and smoothly transmits energy to the whole body. A closed-loop pressure system was built according to the cardiovascular structure. The experiments were carried out by changing the system pressure, the speed of the peristaltic pump and the stretch ratio of the experimental tube. The following conclusions were reached: 1. when the system pressure was 100mmHg, the speedwas70rad/min and the stretch ratiowas1.4, the maximum cumulative flow rate of 20min was 4991.7mL. 2. The average flow rate was positively correlated with the inner pipe pulse pressure (pulse pressure, PP), negatively correlated with the average pressure in the tube, and had no obvious relationship with the average pressure of inlet-outlet. 3. The inner pipe PP increased with the increase of circumferential elastic modulus of the experimental tube.