Minimally invasive intervention-type artificial heart axial flow blood pump

Abstract

Disclosed is a minimally invasive intervention-type artificial heart axial flow blood pump. The minimally invasive intervention-type artificial heart axial flow blood pump is used for assisting in blood circulation of a failing heart. The blood pump comprises a front catheter, a sleeve, a pump body and a micro motor, wherein the pump body and the micro motor are arranged in the sleeve, the micro motor is fixed on the sleeve, and the pump body comprises a rotor hub, rotor blades, a rear guide vane hub and rear guide vane blades. The blood pump is mainly characterized in that the gradually-varying inner diameter is adopted, the minimum sectional area of the gradually-varying inner diameter is the same as the sectional area of a flow field area in the middle of a rotor, and the rotor hub is connected with the rear guide vane hub through a tooth-shaped sealing structure. Under the condition that the sectional area of the flow field of the rotor area is basically unchanged, the energy loss caused by the change of the sectional area of the flow field is effectively reduced, so that the working efficiency of the blood pump is improved. Meanwhile, invasion of blood cells in gap areas is avoided, the problem that damage to the blood cells in the gap areas of the rotor hub and the rear guide vane hub of an existing minimally invasive intervention-type axial flow blood pump is large is solved, which remarkably enhances the reliability of the blood pump accordingly.

Description

technical field [0001] The invention relates to a minimally invasive interventional artificial heart axial flow blood pump, which can be used to assist the blood circulation of a failing heart and belongs to the technical field of biomedical engineering. Background technique [0002] Implantable artificial heart blood pump is one of the effective ways to treat end-stage heart failure, but the artificial heart blood pump in clinical application is installed through chest opening, which is difficult to operate and has a large trauma area; The interventional micro-axial blood pump provides a safer and more effective technical means. The pre-catheter is lowered from the aorta to the left ventricle, and then the catheter passes through the aortic valve. The blood flow through the pump increases the pressure and flow into the aortic arch, thereby reducing the heart load. Provides blood assist flow throughout the body. However, due to the small size of the minimally invasive inter...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a minimally invasive interventional artificial heart axial flow blood pump, which can effectively reduce the energy caused by the change of the cross-sectional area of ​​the flow field area under the condition that the cross-sectional area of ​​the flow field in the rotor area is basically unchanged. loss, thereby improving the working efficiency of the blood pump; at the same time avoiding the invasion of blood cells in the gap area, solving the problem of relatively large blood cell damage in the gap area of ​​the existing minimally invasive interventional axial flow blood pump rotor hub and rear guide vane hub, thereby enhancing the blood pump. Reliability to ensure the safety of patients

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