An implantable two-stage axial flow blood pump rotor structure

Abstract

The invention relates to an embeddable two-stage axial flow blood pump rotor structure. The embeddable two-stage axial flow blood pump rotor structure comprises a rotor head part, a rotor tail part and an impeller part, wherein the impeller part which adopts a two-stage structure design comprises a front-stage impeller and a back-stage impeller; the front-stage impeller (2) in a spiral structure has three blades; the back-stage impeller (3) is in a traditional axial flow structure; an axial distance is arranged between the front-stage impeller and the back-stage impeller; the surface curve equation of the heat part of the rotor is as follows: Formula, wherein the x is an axial distance of a hub; the y is a radial distance of the hub; and the original point is an intersection point of the surface curve of the head part of the rotor and the axial line of the hub. The embeddable two-stage axial flow blood pump rotor structure can enable the blood pump rotor to satisfy with a lift requirement at a relatively low rotating speed under the precondition that the axial size is as small as possible, thereby decreasing formation of hemolysis and reducing power consumption efficiently, and can reduce irregular flow resulted from the more complex blood pump rotor structure as the transition between the front and back impellers is corrected.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to an implantable two-stage axial flow blood pump rotor structure. Background technique [0002] According to the report of the World Health Organization, up to 17 million people die from heart disease in the world every year, among which the number of people who died of heart disease accounted for one-third of the global death toll in 1999, and in developing countries, the number of deaths caused by heart disease The number is more serious and has become the number one killer. Although the United States has a long history of successful heart transplants, according to a survey conducted by the National Heart Blood and Lung Research Institute of the United States, the United States can provide 2,000 heart donors each year, but the number of people who need heart transplants is as high as 35,000. Thousands of people, much higher than the number of heart donors. W...

AI Technical Summary

Problems solved by technology

Higher speed requires higher power drive, and at the same time, the damage to the blood is greater, especially the damage to the red blood cells in the blood, resulting in the formation of hemolysis

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