Designing Centrifugal Impeller of a Left Ventricular Assist Pump using Point-by-Point Method

Increasing growth of cardiovascular disease treatment caused the occurrence of heart failure for more patients after surviving. This leads to an increase in the need for types of equipment in these patients for struggling heart failure. Ventricular assist pumps have been known as one of the main types of equipment, today. In the present study, a ventricular assist pump has been designed in which its impeller has been designed using the industrial method (point-by-point method). In this study, 7 impellers with different inlet angles (including 10, 15, 20, 30, 35, 40 and 45 degrees) and outlet angle of 25 degrees were designed and analyzed using computational fluid dynamics. The results indicate that all designed impellers in this study can fulfill the physiological requirements according to pressure difference (total head) and flow rate. Meanwhile considering hemolysis as an effective factor in the performance of ventricular assist pumps, the impeller with an inlet angle of 10 degrees is chosen due to the lowest hemolysis index, equal to 0.0045, and complying total head and flow rate, which are equal to 108 and 5, respectively.