Magnetic-driven axial-flow auxiliary pump for heart

Abstract

The invention discloses a magnetic dive axial-flow heart assistant pump, composed of stator, rotor, and DC voltage-stabilized power supply. The stator comprises stator winding and stator casing and the rotor composed of tube high-energy level magnet and propelling equipment. The propelling equipment integrated composed of internal sleeve, central shaft and two impeller blades to develop a spiral sealed blood propelling channel; the rotor is placed in the subulate shaft sleeve of stator cantilever. The stator winding generates magnetic field to drive the rotor to put the blades in motion, makes the blood one-way flow and assists or completely replaces the heart to pump blood. The stator winding is connected with the power supply.

Description

technical field [0001] The present invention relates to a heart assist pump. Background technique [0002] During nearly half a century of research on cardiac assist devices, their materials, structures, manufacturing processes, functions, and service life have been continuously improved and developed, and different drive methods such as pneumatic, electric, and electro-hydraulic have emerged. The blood flow is also closer to the physiological heart. Cardiac assist devices are an important means of maintaining life in critically ill patients. It is divided into three ways: final replacement, waiting for transplantation, reducing cardiac load, and promoting functional recovery. [0003] With the continuous development of medical science, there are more and more patients with acute heart failure, unable to leave the cardiopulmonary bypass machine after cardiac surgery, and waiting for heart transplantation. They urgently need cardiac assistance for short-term transition or l...

AI Technical Summary

Problems solved by technology

The traditional axial flow pump cannot solve the problem of damage to the blood and coagulation mechanism caused by cutting blood during the rotation of the blades

[0005] Commonly used heart assist devices can lead to various bacterial and even fungal infections, thrombosis, destruction of blood and blood vessels, and decreased immune function

Long-term use of axial flow pumps for advective perfusion is still controversial. Experiments have shown that long-term use of non-fluctuating blood flow can lead to thinning of the aortic wall structure and decreased vasoconstrictive function.

Moreover, the wear of the shaft neck of the axial flow pump and the blood flow, and the cutting of the blood by the rotating blades all lead to the destruction of blood and the formation of thrombus.

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