Axial-flow type heart-assist apparatus with heparin coating and hydrophobic protection

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to an axial flow type heart-assist apparatus with a heparin coating and hydrophobic protection. The heart-assist apparatus comprises a blood flow channel, an axial flow impeller and a driving motor, wherein the driving motor comprises a stator shell which is integrally cylindrical, the stator shell is provided with an accommodating space for arranging a columnar rotor, rotating shafts are arranged at two ends of the columnar rotor, bearings are arranged between shaft bodies at two ends of the rotatingshafts and two ends of the stator shell, and heparin is attached to the surface of the stator shell and the surface of the columnar rotor. According to the heart-assist apparatus, heparin is attachedto the adjacent surfaces of the columnar rotor and the stator shell, so that the thrombus formation is effectively inhibited; and meanwhile, a hydrophobic material is attached to the inner surface ofthe bearing close to a blood outflow opening, and the shaft body of the corresponding rotating shaft, so that blood is effectively prevented from entering the inside of the driving motor.

Description

technical field [0001] The invention belongs to the technical field of medical devices, in particular to an axial-flow heart assist device with heparin coating and hydrophobic protection. Background technique [0002] For patients with left ventricular failure, when drug treatment is ineffective, it is usually necessary to install a left ventricular assist device. The purposes include: 1) waiting for a donor and preparing for heart transplantation; 2) resting the heart and restoring heart function. The current left ventricular assist devices mainly include temporary left ventricular assist devices and long-term left ventricular assist devices; among them, temporary left ventricular assist devices include partial axial flow pumps and balloon pulsation devices, and their main features are percutaneous puncture or incision, Transvascular implantation; the advantage is that it can be implanted quickly and the drive is relatively simple, and it is suitable for emergency rescue of...

AI Technical Summary

Problems solved by technology

The above-mentioned shaft seal flushing system has obvious disadvantages: one is that it increases the difficulty of manufacturing the drive motor, and the shaft seal flushing hole needs to be connected to an external device through a pipeline to complete the flushing function, so the hole must be pierced through the drive motor, and the hole The diameter of the shaft is only 0.9mm, which poses a huge challenge to the processing and manufacturing of the drive motor; the second is that the shaft seal flushing system is equivalent to continuously injecting liquid into the patient's blood circulation system, increasing the circulation flow and increasing the heart rate. Afterload, which is extremely detrimental to the recovery of cardiac function in patients with heart failure

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