Vortex type implantable pulse ventricle assisting blood pump

Abstract

The invention discloses a vortex type implantable pulse ventricle assisting blood pump. The vortex type implantable pulse ventricle assisting blood pump comprises an inlet joint, an outlet joint, an inlet valve, an outlet valve, an upper cap, an elastic membrane, an inner cylindrical cam, a linear guide rail, an ultrasonic motor rotor, two rolling bearings, a pretension shaft, an ultrasonic motor stator, a base and a shell. By adopting a mechanical motion converting mechanism of the reverser inner cylindrical cam in the vortex type implantable pulse ventricle assisting blood pump, the top of the cylindrical cam and a push plate embedded at the bottom of the elastic membrane are combined into one, the number of motion transmission parts is decreased, and pump volume is reduced and easy to implant. Meanwhile, according to the relative position of the left ventricle and the ascending aorta, a blood inlet and a blood outlet are respectively arranged at adjacent positions on one side of a blood cavity with a hemispherical recess, so that a vortex flow is formed in the blood cavity, flushing effect on the wall surface of the blood cavity is improved and thrombus formation is reduced.

Description

technical field [0001] The invention relates to a ventricular assisting device in the technical field of medical instruments, in particular to an implantable vortex type pulsating left ventricular assisting blood pump driven by an ultrasonic motor. Background technique [0002] At present, heart disease has become one of the most important diseases affecting human health in the world. Mechanical assisted circulation has not only entered the service catalog of heart failure treatment, but has gradually developed into a permanent treatment for heart failure. [0003] The existing ventricular assist blood pumps are mainly divided into advection type and pulsatile type blood pumps according to the blood supply mode. Among them, the advection blood pumps, such as centrifugal and axial flow ventricular assist blood pumps, all need to use high-speed rotating blades. Because the shear stress generated by the high-speed rotation of the blades has a strong destructive force on red b...

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Problems solved by technology

However, in this structure, the blood cavity is filled by the gravity of the blood itself, and the flow rate of the ventricular auxiliary blood pump is relatively small.

[0006] In addition, all the above-mentioned design schemes did not take into account: (1) When the valves at the inlet and outlet of the ventricular auxiliary blood pump on both sides of the blood cavity are opened and closed in turn, the static blood in the valve closing circuit of the ventricular auxiliary blood pump is likely to cause the problem of thrombus; (2) When the ventricular auxiliary blood pump is implanted in the body and connected to the natural cardiovascular system, there is a problem of increased blood flow resistance caused by longer and more curved connecting lines.

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