The quantitative evaluation of hemolysis is very important for the designing and studying a blood pump,so establishing a hemolytic mathematic model is very significant for predicting the hemolysis,improving the blood compatibility of axial flow blood pump and reducing the damage to blood.Based on analyzing the correlative factors of hemolysis,first we studied the hemolysis problem from the viewpoint of conservation of energy,and ascertained that the output power produced from the pump’s impellers could be divided into two parts,one was used to increase blood pressure and the other was led to hemolysis.After that we confirmed the hemolytic model by dynamic system torque and energy equations.Finally,we established the mathematical formula of blood pump in different conditions (normal and suction) to evaluate the hemolytic value.This paper provides a new idea for studying the hemolytic problems,and gives scientific basis for improving a blood pump and its controlling system.
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