Serial cascade stator structure of artificial heart blood pump

Abstract

The invention relates to a serial cascade stator structure of an artificial heart blood pump. The serial cascade stator structure comprises an expanding hub passageway and stator blades thereof; the expanding hub passageway adopts a streamline cubic spline curve passageway; the stator blades are composed of five blades at the front row and five blade at the rear row; a certain clearance is remained between the front edge of the blade at the rear row and the trailing edge of the blade at the front row; and the blades at the front and rear rows of the stator blades are arranged in the circumferential position structure as follows: the root part and the tip part of the front edge of the blade at the rear row are located at 35% of a circumferential angle between the blades at the front row. The structure design of the invention has higher blood-supply and pressure rising capability, can obtain better flow field distribution, improve the anti-hemolysis properties of the blood pump, and meet the requirement for embedding in heart failure patients in a short time or a long time.

Description

technical field [0001] The invention relates to a tandem cascade stator structure of an artificial heart blood pump, which belongs to the technical field of comprehensive impeller machinery technology and medical technology. Background technique [0002] Heart failure is a late stage in the development of various heart diseases, directly threatening the lives of more and more patients. The current treatment methods for heart failure mainly include: drug therapy, surgery, mechanically assisted circulation, heart transplantation, cell transplantation and so on. Drug treatment accounts for the vast majority of them, but when the condition is serious, or even when the heart function is lost, heart transplantation must be taken for treatment. However, the treatment method of heart transplantation has great limitations, mainly because the number of healthy hearts used for transplantation is small and it is difficult to obtain in time, and rejection and opportunistic infection may...

AI Technical Summary

Problems solved by technology

The blood pump stator part of the general structure adopts a row of blades to bear the large blood flow deflection angle. The defect of this structure is that the high-speed and large deflection angle blood flow at the rotor outlet is transformed into a smooth axial flow through the stator part. During the process, there will be an angle deflection close to 70·-80·, which will easily cause separation problems such as eddy current and backflow, which will cause hemolysis and affect the anti-hemolysis performance of the blood pump

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