Study on Temperature Rise Mechanism of Axial Flow Pump

Study on Temperature Rise Mechanism of Axial Flow Pump
To reduce complications, mechanical cardiac assist devices are becoming smaller. As the clinical application in recent years proved that continuous non-Bo blood flow can be adapted to the body, the use of high-speed rotation of the impeller to drive the blood can also reduce the volume of the pump, so the electric axial flow of the heart of the auxiliary pump has become a hot topic in this field. The author of the Chinese Academy of Medical Sciences Fu Wai Cardiovascular Hospital on the heart of a long-term systematic study. Recently developed axial pump has reached short-term clinical application requirements. In order to achieve long-term application goals, we put forward the idea of ​​"miniature axial flow pump in the apical chamber wall" based on the previous research experience, and carried out the prototype development. In the development process found that with the miniaturization of the axial flow pump, the speed gradually increased, some characteristics of the pump motor deterioration, efficiency. This trend increases the temperature of the pump in the working state. Excessive pump surface temperature can cause similar damage to the organization, resulting in exudative inflammatory response, reduce the physiological compatibility. We developed the "apical chamber wall micro-axial pump", intended to be implanted into the apex muscle wall, due to the miniaturization of the pump is very high, poor heat dissipation conditions, temperature control has become an important part of the study. Such studies have not been reported in domestic and foreign literature. In this paper, the factors influencing the temperature rise of the blood pump were discussed through the comparative analysis of the micro-axial pump in the apical chamber wall, which laid the foundation for the proposed control scheme.