Low-blood-loss micro axial-flow type artificial heart

Abstract

The invention discloses a low-blood-loss micro axial-flow type artificial heart which comprises a vane wheel, a motor rotor, and a motor stator, wherein the vane wheel is arranged inside the motor rotor in an interference fit and coaxial mode, the vane wheel is placed between an entry guide vane and an exit guide vane, two flow-guiding cones with large ends of 3mm are respectively arranged on an inlet end of the entry guide vane and an outlet end of the exit guide vane, the conical degree of the flow-guide cone is 90 degrees, and the two flow-guiding cones are in symmetrical arrangement. The helical angle of each flow-guiding vane on the entry guide vane gradually reduces from 90 degrees to 30 degrees along the axial direction from the inlet end to the outlet end, and the helical angle of each flow-guiding vane on the exit guide vane 3 gradually increases from 30 degrees to 90 degrees along the axial direction from the inlet end to the outlet end. The vanes on the vane wheel and all the flow-guiding vanes are in the shape of a logarithm helical line. Shaftless drive of the vane wheel reduces thrombus risk, and the micro structure improves the ability to implant. The low-blood-loss micro axial-flow type artificial heart has the advantages of being low in hemolysis, strong in implanting ability, simple in structure, high in reliability and the like.

Description

Technical field [0001] The present invention involves the field of medical devices and biomechanics. It refers to a kind of miniature -shaft -type artificial heart with a hypotemoranty.It is particularly suitable for body circulation and in vitro circulation medical equipment. Background technique [0002] The rotation of artificial heart has the advantages of implantation and high reliability, and is widely used in the treatment of acute myocarditis and myocardial infarction. The transition before the heart transplantation and the long -term cycle assist of patients with end -stage heart failure.At present, the common rotation artificial hearts are mainly centrifugal and axial flow.The advantages of centrifugal artificial hearts are high hydropower efficiency, low speed, and good blood compatibility, which has been widely used.However, it also has significant disadvantages: for the blood pump impeller that uses non -magnetic suspension technology to rotate directly by the motor ...

AI Technical Summary

Problems solved by technology

However, it also has significant disadvantages: the impeller of the blood pump using non-magnetic levitation technology is directly driven by the motor shaft, and thrombus is easily formed at the contact between the shaft and the impeller; it is difficult to miniaturize the size of the centrifugal blood pump using the magnetic levitation motor; Surgery requires a bypass, which also increases the risk of blood clots

However, in order to achieve the flow and pressure required by physiology, the impeller must work at a high speed of more than 6000 rpm, which will cause damage to the blood and poor blood compatibility

In addition, the existing axial-flow artificial heart implantation still requires extracardiac bypass, which increases the risk of thrombosis caused by the bypass

Images