A kind of external centrifugal type magnetic levitation artificial heart pump and using method

Abstract

The present disclosure relates to an extracorporeal centrifugal magnetic levitation artificial heart pump and a method of use thereof, belonging to the technical field of medical devices. The artificial heart pump comprises a casing structure, the top of the casing structure is provided with a blood inlet channel, and the outer wall surface of the casing is provided with a blood inlet channel. There is a blood outlet channel on the upper part, a suspended and rotatable impeller base is arranged in the center position of the inner part of the casing, and a guide cone is arranged inside the casing below the blood outlet channel; the outer wall surface of the impeller base is circumferential A plurality of permanent magnets are uniformly arranged in the direction, and a plurality of stator iron cores connected to the casing are uniformly arranged in the circumferential direction of the bottom of the casing, and coils are arranged on the stator iron core. The artificial heart pump of the present disclosure is beneficial to reduce the occurrence of hemolysis and thrombosis, and can simulate the output of pulsatile blood flow.

Description

technical field [0001] The present disclosure belongs to the technical field of medical devices, and in particular relates to an in vitro centrifugal magnetic levitation artificial heart pump and a method for using the same. Background technique [0002] The statements herein merely provide background related to the present disclosure and do not necessarily constitute prior art. [0003] At present, the number of patients with heart failure in my country is increasing year by year. Heart transplantation is considered to be an effective method for the treatment of heart failure. However, the number of heart donors is very limited, so this method cannot be widely used. An artificial heart pump is a device that provides power for human blood circulation through mechanical circulation. It can not only assist patients in the short-term transition to heart transplantation or restore cardiac function, but also can replace heart transplantation for long-term circulatory adjuvant the...

AI Technical Summary

Problems solved by technology

(1) At present, there are no mature extracorporeal centrifugal artificial heart pump products in China and power blood pumps used with membrane lungs as ECMO. Most of the existing imported ECMO blood pumps use magnetic coupling drive mode, which is prone to rotation speed. The problem of loss, and this driving method is easy to cause hemolysis and thrombus due to the existence of the bearing structure

(2) Since the pump head and the drive motor are separated in the external centrifugal artificial heart, collisions between the impeller and the volute are prone to occur when the pump head is transported, which may cause scratches on the impeller and volute to increase the probability of hemolysis and thrombus

(3) The original pulsating blood flow, the placement angle of the blood pump, the vibration during operation and handling will all affect the operation stability of the impeller, causing the vibration of the impeller to cause the internal flow field of the blood pump to be disordered and aggravate the damage to blood cells. Serious complications that even lead to blood pump stalling

(4) The single-degree-of-freedom magnetic levitation structure has insufficient stability when the impeller rotates at high speed, and cannot output pulsating blood flow under simulated physiological conditions. The existing method of simulating pulsating blood flow by simply changing the impeller speed will aggravate blood cell damage

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