Ultrasonic anti-thrombus magnetic suspension cardiac apex centrifugal pump

Abstract

The invention discloses an ultrasonic anti-thrombus magnetic suspension cardiac apex centrifugal pump. A stator iron core (22) and a stator winding (23) are arranged in the wall of a pump cylinder (2), and a rotor permanent magnet (21), a rotor radial suspension magnet (24) and a stator radial suspension magnetic ring (25) are arranged in a rotor cylinder (4). A flow guiding cone (26) is arrangedin the center of the rear wall of a blade shell (7), a mechanical fulcrum ball socket (15) is arranged at the top end of the flow guiding cone (26), a mechanical fulcrum ball (5) is arranged at the rear end of the rotor cylinder (4), and the mechanical fulcrum ball (5) and the mechanical fulcrum ball socket (15) form a mechanical fulcrum (8). A fulcrum clearance (16) communicates with a drug catheter (18) and a drug injection plunger (19) through a center hole (17). The drug injection plunger (19) is implanted below the abdominal wall skin to accept anticoagulant liquid medicine to enter the fulcrum clearance (16). The flow guiding cone (26) is internally provided with an ultrasonic transducer (20) which can generate ultrasonic vibration to be transmitted to a centrifugal impeller (27) through the mechanical fulcrum (8), and thrombosis is prevented from being formed on the surface of the centrifugal impeller (27) through the ultrasonic cleaning effect.

Description

technical field [0001] The invention relates to an implantable ultrasonic antithrombotic magnetic levitation apex centrifugal pump for treating heart failure, which connects the cavity of the left ventricle and the aorta, and reduces the load on the heart by directly transporting the blood in the left ventricle to the aorta. The front end of the centrifugal impeller is in a magnetic levitation state, and the tail end is supported by a mechanical fulcrum. A local drug injection cavity is set and mechanically contacted with the ultrasonic transducer. Through local anticoagulant drug release and ultrasonic cleaning, the fulcrum and the surface of the impeller are prevented from forming and adhering to thrombus. Background technique [0002] Long-term assisting cardiac pump function with implantable blood pump is an effective method for treating advanced heart failure. However, the centrifugal blood pump currently used as an auxiliary device is prone to thrombus in the pump, whi...

AI Technical Summary

Problems solved by technology

[0003] The patent of the present invention proposes an ultrasonic anti-thrombotic magnetic levitation apical centrifugal pump. Aiming at the shortcomings of large volume, poor anatomical compatibility and insufficient anti-thrombotic ability of centrifugal blood pumps implanted in various apical parts of the heart, it adopts single fulcrum magnetic levitation, local injection of drugs and Ultrasonic cleaning antithrombotic technology can reduce the volume of the pump and improve anatomical compatibility, and can prevent thrombus formation in the pump through local medication and ultrasonic cleaning, which helps to overcome the shortcomings of various current cardiac assist devices

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