Ultrasonic motor driving roller pump

Abstract

The invention relates to a roller-type blood pump driven by an ultrasonic motor and pertains to the technical field of medical apparatus and instruments. The blood pump has the structure that the lower surface of a rotor disc is contacted with the upper surface of a stator disc; the ultrasonic motor comprises the stator disc and the rotor disc; a roller-type force application device is arranged on the upper surface of the rotor disc along a diameter direction; the lower end of a neutral pre-tightening column which is connected with a center of a shell is pressed against the rotor disc; a circular blood bag is arranged between the shell and the rotor disc; the neutral pre-tightening column runs through an annular hole in the center of the circular blood bag and the lubricating substance flows out of a lubricating hole in the neutral pre-tightening column; the circular blood bag is fixedly connected with the shell and tube ports of the blood bag are led out by the circular blood bag and then through a hole of the shell; the circular blood bag is provided with a gap or a cut-off plane or a necking blockage part to control the flowing direction of the blood with the rotating direction of the rotor disc of the ultrasonic motor. A fastener of a shell of the stator is connected with the stator and the shell while a monitoring and controlling module is connected with a driving module which is connected with the ultrasonic motor. The roller-type blood pump driven by an ultrasonic motor of the invention has the advantages of compact and flexible structure, no need of artificial valve and the control of a fixed-direction blood flow can be achieved.

Description

technical field [0001] The invention relates to a blood pump in the technical field of medical devices, in particular to an implantable ultrasonic motor-driven rolling blood pump for ventricular assistance. Background technique [0002] For patients with end-stage heart failure, there are currently clinical options such as intra-arterial balloon pump (IABP) and ventricular arterial bypass (V-AB) to assist the circulatory system. Its ventricular assist device (VAD), as a kind of ventricular arterial bypass, can help patients with end-stage heart failure through the critical period of waiting for a heart donor; or for patients with chronic heart disease, it can also rely on various implantable devices. VAD is permanently supported. So far, ventricular assist devices that have entered the medical market or have mature technology can be roughly divided into centrifugal blood pumps, pneumatic and hydraulic diaphragm assist devices, implantable axial flow pumps and implantable pu...

AI Technical Summary

Problems solved by technology

However, at present, the motor in this rolling blood pump is relatively large in size and heavy in weight, so it can only be used for extracorporeal circulation and cannot be implanted into the human body.

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