In-vitro centrifugal magnetic suspension artificial heart pump and using method

Abstract

The invention relates to an in-vitro centrifugal magnetic suspension artificial heart pump and a using method, and belongs to the technical field of medical instruments. The artificial heart pump comprises a shell structure; a blood inlet channel is formed in the top of the shell structure; a blood outlet channel is formed in the outer wall surface of the shell; a suspended and rotatable impellerbase is arranged in the centre of the interior of the shell; a flow guide cone is arranged at the position, below the blood outlet channel, of the interior of the shell; several permanent magnets areevenly arranged on the outer wall surface of the impeller base in the circumferential direction; several stator iron cores connected with the shell are evenly arranged at the bottom of the shell in the circumferential direction; and coils are arranged on the stator iron cores. The artificial heart pump disclosed by the invention is beneficial to reducing hemolysis and thrombus and can simulate andoutput pulsating blood flow.

Description

technical field [0001] The disclosure belongs to the technical field of medical devices, and in particular relates to an extracorporeal centrifugal magnetic levitation artificial heart pump and a use method thereof. Background technique [0002] The statements herein merely provide background information 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, which prevents this method from being widely used. The artificial heart pump is a device that provides power for human blood circulation through mechanical circulation. It can not only help patients safely transition to heart transplantation or recover heart function in the short term, but also replace heart transplantation for long-term circulat...

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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