A miniature ventricular assist device with foldable impeller

Abstract

The invention discloses a miniature ventricle auxiliary device with foldable impeller, which comprises a motor and a pump casing. The shaft end of the motor is fixedly connected to a disk, and the disk is connected to one side of the pump casing through a connecting shaft; the side of the pump casing is axially opened with a At the mouth of the mechanical arm, the inner center of the pump casing is provided with a bearing seat along the axial direction, and a rotating shaft is arranged inside the bearing seat. One end of the rotating shaft is fixed with a bearing, and the other end of the rotating shaft is connected with a spring. The rotating shaft is sequentially sleeved with gears along the axial direction. , a fixed disk and a rope set on the rotating shaft, the fixed disk is fixed, the two sides of the rope are connected to the impeller, and the impeller is set in the impeller groove inside the pump casing; the impeller groove is also radially There are springs; the outside of the pump casing has three holes along the circumference for the ejection of the impeller; the invention relates to a miniature ventricle assisting device with a foldable impeller. The use error rate is small.

Description

technical field [0001] The invention belongs to the field of Class III medical devices of biomedical engineering, and relates to a miniature ventricle assisting device with foldable impellers. Background technique [0002] Ventricular assist devices have become a treatment option for patients with severe heart failure and a bridging therapy for patients awaiting transplantation. When the natural heart partially or completely loses its function due to disease damage and cannot maintain the normal circulation of the whole body, the ventricular assist device can temporarily or permanently replace the heart function partially or completely to promote blood circulation. When this kind of mechanical assist device is used clinically, it has always been difficult to balance the implantability and blood compatibility of the impeller and the device. If the size of the impeller is small, the motor speed of the device needs to be increased to meet the perfusion requirements, but high s...

AI Technical Summary

Problems solved by technology

If the impeller is too large, the device can run at lower speeds, but its implantability is reduced and it cannot be implanted by minimally invasive surgery

[0003] The existing foldable impeller artificial heart pump adopts a cage structure, such as CN201410450242.0, a foldable minimally invasive implanted intraventricular axial flow blood pump, which can shrink its own pump casing when the heart pump is implanted. Folding purpose, but flawed when the heart is pumped out

Because there is no secondary contraction structure, it is difficult to remove

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