Implant-type blood flowing pump with self-suspended shaft

Abstract

The invention relates to the technical field of medical instruments and discloses an implant-type blood flowing pump with a self-suspended shaft. In the implant-type blood flowing pump, a rotor comprises a hollow cylindrical steel magnet (5) and built-in blades fixed in the steel magnet (5); the rotor is directly arranged in the middle of a stator; the stator is neither directly nor indirectly connected with the rotor through a bearing; the rotor automatically separated form the inner wall of the stator during rotating and is in a suspended state. As the bearing and a magnetic suspension control system are not adopted, the size of the implant-type blood flowing pump is smaller and the weight of the implant-type blood flowing pump is lighter, the implant-type blood flowing pump does not stop rotating when a mechanical failure occurs to the bearing, so that the reliability is higher, and the formation of thrombus in the position of the bearing is avoided. The implant-type blood flowing pump adopts a serial structure that the built-in blades (8) are in the front and the external blades (9) are in the rear; the tangent planes of the blades adopt the modes of the wings of a marine ducted propeller, so that the implant-type blood flowing pump can ensure that blood smoothly branches in and passes through main vessels and branch vessels.

Description

Technical field [0001] The present invention relates to the technical field of medical devices, 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 cost. 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 are ready to receive heart transplants die of deteriorating heart function while waiting for a donor. [0003] The emergence and development of ventricular assist devices (Ventricular Assist Devices, referred to as "VAD") has given a new way to treat heart failure. Since 1981, the National Institutes of Health (National Institutes of Health, referred to as "NIH") Initiated the RFPs (a Request For Proposals, referred to as "Request for Proposals") program for the development of "implantable ventricular assist devices...

AI Technical Summary

Problems solved by technology

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

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

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