Magnetically-driven external ventricular blood pump for pumping blood in fluctuating manner

Abstract

The invention discloses a magnetically-driven external ventricular blood pump for pumping blood in a fluctuating manner, which comprises a pump body formed by buckling an upper pump body and a lower pump body, a magnetic ring is sleeved outside the upper part of the upper pump body, the magnetic ring is connected with a disc-shaped membrane assembly in the pump body, the upper pump body and the magnetic ring outside the upper pump body are sleeved with a magnetically-driven assembly, an inlet pipe of the upper pump body extends out of the magnetically-driven assembly, and an outlet pipe of the lower pump body extends out of the magnetically-driven assembly. A separation disc is arranged in the lower pump body and divides an inner cavity of the pump body into an upper flow channel and a lower flow channel. Under the action of an alternating magnetic field of the magnetic driving assembly, the magnetic ring drives the disc-shaped membrane assembly to oscillate up and down together, so that a flexible disc-shaped membrane of the disc-shaped membrane assembly oscillates up and down in the upper flow channel and generates wave motion in the radial direction of the flexible disc-shaped membrane, and then the flexible disc-shaped membrane is driven by the wave type pushing action of the flexible disc-shaped membrane to generate wave motion in the radial direction of the flexible disc-shaped membrane. Blood flowing in from the inlet pipe enters the upper flow channel, then diffuses all around, flows into the lower flow channel and flows out from the outlet pipe of the lower pump body. The pulsating blood flow volume and the pulsating blood pressure conforming to human physiological characteristics can be generated, and the occurrence risk of complications such as hemolysis and thrombus is reduced.

Description

technical field [0001] The invention relates to a ventricular blood pump, in particular to a ventricular blood pump which can realize the effect of fluctuating blood pumping. Background technique [0002] Ventricular assist device is an effective medical device for the treatment of end-stage heart failure, among which left ventricular assist device is the most common. The core component of the left ventricular assist device is the left ventricular blood pump. At present, there are three kinds of left ventricular blood pumps, which are pulsatile, axial flow and centrifugal left ventricular blood pumps. Among them, the centrifugal left ventricular blood pump based on magnetic levitation centrifugal technology Ventricular blood pumps are the most mature and have been used in clinical treatment. However, it can be found from actual use that centrifugal left ventricular blood pumps have non-physiological flow characteristics such as high rotational speed and high shear force for ...

AI Technical Summary

Problems solved by technology

The core component of the left ventricular assist device is the left ventricular blood pump. At present, there are three kinds of left ventricular blood pumps, which are pulsatile, axial flow and centrifugal left ventricular blood pumps. Among them, the centrifugal left ventricular blood pump based on magnetic levitation centrifugal technology Ventricular blood pumps are the most mature and have been used in clinical treatment. However, it can be found from actual use that centrifugal left ventricular blood pumps have non-physiological flow characteristics such as high rotational speed and high shear force for blood during operation, which will lead to The blood flowing through the centrifugal left ventricular blood pump is prone to hemolysis, thrombosis and other blood compatibility problems, which need to be solved

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