Sleeved type permanent magnetic impeller axial flow type blood pump for assisting heart and assisting method

Abstract

A bushing-type permanent magnetic impeller shaft bleeding pump, which is used for heart boosting and the boosting method of the bleeding pump are provided. A rotor of the bleeding pump is a whole magnetic impeller or an impeller with magnetic vanes, which greatly improves a magnetic field intensity of a bleeding pump air gap. A defending, a packing and a biochemical treatment are taken on the surface of the impeller. A tube cavity of the bleeding pump is made from a material with good blood compatibleness. A pre-diversion system structure is simplified, and a pre-diversion wimble is supported by a single cantilever, which are all in favor of preventing a thrombosis. The boosting method adopts a serial-type connection of an axial bleeding pump and ventricles of heart (left ventricle, right ventricle or double ventricles) and requests that an appearance of the bleeding pump is a geometrical shape of as ascending aorta or a main pulmonary artery which is fit for implantation, and the tube cavity and an artificial blood vessel caliber match with a natural blood vessel. In order to prevent a pumping action of the bleeding pump reduces a perfusion pressure of a coronary artery, a coronary artery and aorta bypass transplantation can be performed.

Description

Technical field [0001] The invention belongs to the category of biomedical engineering, and relates to an artificial heart mechanical auxiliary device and an auxiliary method for treating end-stage heart failure. Background technique [0002] A variety of heart diseases can lead to failure of the heart's pump function, which threatens the life of the patient. Cardiac assistance is the use of mechanical devices to maintain blood circulation throughout the body, so that the damaged heart can rest and the function of the failing heart can be restored. A biventricular assist or total artificial heart is a biventricular mechanical assist device that supports both pulmonary and systemic circulation. Assisted circulation and artificial heart have become the last resort for patients with cardiogenic shock, patients who cannot leave the artificial heart-lung machine after cardiac surgery, or critically ill patients after surgery, and can also be used in the transitional stage of hea...

AI Technical Summary

Problems solved by technology

For the former structure, due to the small volume and various shapes of the blade-shaped magnetic steel, it is difficult to ensure the uniformity, symmetry and gravity balance of the rotor during processing and manufacturing, so the rotor torque is often large and unbalanced, resulting in The mechanical stability of the blood pump is poor, and the function is reduced; the latter structure often cannot provide sufficient magnetic moment in a small volume

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