Hemodynamic Performance of a Miniature Axial Blood Pump Caused by Motors

This paper presents a testing to examine the hemodynamic performance of a miniature axial blood pump caused by different motors. Three different motors was emplaced in the pump; 33% glycerin water flew into the testing rig; pump rotational speed, inlet pressure, outlet pressure, flow rate, power current and voltage were determined. The miniature axial blood pump produced a flow rate of 2~7 L/min against pressure head of 40~180 mmHg for 5000~14000 rpm rotational speed, the efficiency ranged from 6% to 12%. The motor plays a key role in improving the hemodynamic performance of the blood pump. The #2 motor is superior than #1 and #3 motor because its lower rotational speed and higher efficiency. The pump has reached the demand of flow rate and pressure of people.