Implantable self-suspension axial-flow blood pump

Abstract

An implanted self-suspended axial flow blood pump, comprising a stator and a rotor; the stator comprises a stator iron core (2), a stator coil (3) and a motor bracket (4); the rotor comprises a magnetic steel (5) comprising magnetic material and built-in blades (8); the built-in blades (8), the magnetic steel (5), the motor bracket (4), the stator coil (3) and the stator iron core (2) are sequentially disposed in a radial direction from inward to outward in the cross section of the blood pump; the stator and the rotor are connected without bearings; the rotor is in a self-suspended state when rotating; in the structure of the blood pump, the built-in blades (8) are disposed in the front, and the blades (9) to be externally disposed are arranged in the rear, and the tangent plane of the blades take the form of the tangent plane of awing-shaped blade of a marine duct propeller, such that blood is ensured to smoothly bifurcate and flow in main and branch vessels.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to an implantable ventricular assist device. Background technique [0002] Heart failure is the most common diagnosis of cardiovascular patients, and it is also the disease with the highest medical expenses. The international community has regarded heart failure as an important issue to be solved in this century. Due to the lack of donors, about 30% of patients who were prepared to receive heart transplants died of cardiac function deterioration while waiting for a donor heart. [0003] The emergence and development of ventricular assist devices (Ventricular Assist Devices, referred to as "VAD") has brought a new approach to the treatment of heart failure. Since 1981, the National Institutes of Health (National Institutes of Health, referred to as "NIH") Initiated RFPs (a Request For Proposals, referred to as "Request for Proposals") program for the development of "impl...

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Problems solved by technology

[0005] Therefore, the inventors of the present invention have found that the existing implantable bearing blood pumps on the market are easy to wear and vibrate, have short service life, low reliability, and are prone to thrombus formation.

Moreover, the magnetic levitation control system of the magnetic levitation blood pump has complex structure, large volume and heavy weight.

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