Axial flow blood pump adopting split through-hole bearing structure

Abstract

The invention discloses an axial flow blood pump adopting a split through-hole bearing structure. The axial flow blood pump comprises a front cartridge, a rotor, a rotor cartridge and a rear cartridge; three straight blades are uniformly and integrally connected to the annular inner wall of the front cartridge, and the inner walls of the three straight blades are suspended, so that front axial holes are formed; three straight blades are uniformly and integrally connected to the annular inner wall of the rear cartridge, and the inner walls of the three straight blades are suspended, so that rear axial holes are formed; the rotor cartridge is integrally connected between the front cartridge and the rear cartridge; the rotor is arranged in the rotor cartridge; two rotating blades are arranged on the outer circumference of the rotor; and the two rotating blades, which are located between the rear half parts of the rotor, can promote obvious expansion of a runner. The axial flow blood pump provided by the invention has the beneficial effects that since the straight blades in the front cartridge and the rear cartridge, instead of bearings, can take a supporting effect, a rotary-static interface is eliminated; the split bearing structure is defined by the three independent blades; and blood can flow in gaps between front and rear jewel axles and the straight blades, so that a flowing dead zone is prevented and a risk of thrombosis at an axial end is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an axial flow blood pump adopting a piece-type through-hole bearing structure. Background technique [0002] Currently, in the absence of heart transplant donors, installing a ventricular assist pump is an effective way to prolong the life of patients with heart failure. The ventricular assist blood pump can partially or completely replace the pumping function of the heart and maintain the necessary human blood circulation. Ventricular assisting blood pump has played an active role in heart failure, cardiogenic shock treatment, cardiopulmonary resuscitation, transitional support therapy before heart transplantation, and replacement therapy, and still has great application potential. At present, the mainstream of ventricular assist blood pumps is the rotary blood pump. The rotary blood pump is divided into two types: axial flow blood pump and centrifugal blood pump. Axial...

AI Technical Summary

Problems solved by technology

At present, axial flow blood pumps with shafts basically adopt sliding thrust bearing structure. The rotational and static contact area near the contact position between the mechanical bearing and the shaft is large, and the traditional sliding thrust bearing structure is easy to form blood flow dead zone or flow stagnation zone. , with the greatest risk of thrombosis, which has been confirmed by numerical analysis and animal experiments

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