External magnetic field driven magnetic suspension implantation type cone helical runner rotor blood-pump

Abstract

The invention relates to a blood pump auxiliary device, in particular to an artificial heart auxiliary device which uses external magnetic field for driving a magnetic bearing to support an embeddable conical spiral impeller rotor, belonging to the field of biomedical engineering technique; the blood pump is arranged in an alternating magnetic field and comprises a small end shell (1) which is connected with a blood vessel, a large end shell (4) and a middle shell (3); the large end and the small end of the middle shell (3) are respectively connected with the small end shell (1) and the large end shell (4) hermetically; the small end shell (1) and the large end shell (4) are internally and fixedly provided with a small end guide wheel (2) and a large end guide wheel (6) with impellers on the external surface thereof respectively; the impeller rotor (5) is arranged in a space which is formed by the middle shell (3), the small end guide wheel (2) and the large end guide wheel (6); the impeller rotor (5) is internally provided with a shaft (11); a permanent magnetic strip (12) is fixedly arranged between the impeller rotor (5) and the shaft (11); and clearances are arranged between the impeller rotor (5) and the small end guide wheel (2) and the large end guide wheel (6). The blood pump auxiliary device effectively solves a series of technical problems such as sealing infection and biocompatibility and the like, which are caused by leads passing through skins and can not be overcome by traditional blood pumps.

Description

technical field [0001] The invention belongs to the technical field of biomedical engineering, and relates to a blood pump auxiliary device, in particular to an artificial heart auxiliary device which uses an external magnetic field to drive a magnetic bearing to support an implantable conical helical impeller rotor. Background technique [0002] The heart is the power source of human blood circulation. Cardiovascular disease has become the leading cause of human death today. Although heart transplantation is the most effective means of treating critically ill patients with heart disease, many patients die each year while waiting for heart transplantation because the number of recipients is far greater than that of donors. In order to solve this problem, artificial heart assist devices have been proposed. The existing artificial heart assist devices at home and abroad are mainly axial-flow blood pumps, and most axial-flow blood pumps provide energy through power and contro...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of traditional artificial heart assisting devices, the present invention provides an implantable conical helical impeller rotor blood pump driven by an external magnetic field. A series of technical problems that traditional blood pumps are difficult to overcome, such as seal infection caused by skin leads and biocompatibility

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