Flexible membrane magnetic resistance driving type implantable blood pump and artificial blood pump system

Abstract

The invention discloses a flexible membrane magnetic resistance driving type implantable blood pump and an artificial blood pump system. The implantable blood pump comprises a pump shell, a pump assembly is installed in the pump shell, the pump assembly comprises a hybrid magnetic resistance actuator, a vibration assembly is installed on a linear guide assembly of the hybrid magnetic resistance actuator and connected with a flexible membrane, and an upper flow channel assembly and a lower flow channel assembly are arranged above and below the flexible membrane respectively. The vibration assembly vibrates up and down along the linear guide assembly under the driving action of the hybrid reluctance of the hybrid reluctance actuator so as to drive the flexible film to vibrate up and down between the upper flow channel assembly and the lower flow channel assembly and generate wave motion. According to the implantable blood pump, fluctuation conveying of blood is achieved, blood flowing has pulsating physiological characteristics, damage to the blood is small, operation is stable and reliable, the size is small, and the implantable blood pump is suitable for popularization.

Description

technical field [0001] The invention relates to a flexible membrane magnetoresistance-driven implantable blood pump and an artificial blood pump system, belonging to the technical field of implantable artificial blood pumps. Background technique [0002] At present, the number of heart failure patients in China is increasing year by year. One of the effective methods for the treatment of advanced heart failure is the artificial implantation of mechanical ventricular assist devices, mainly left ventricular assist devices. However, most left ventricular assist devices are large in size and require highly invasive and high-risk surgical implantation, so they are usually limited to patients with end-stage heart failure. For patients with heart failure who have not yet reached the end-stage, consider implanting a smaller pump to avoid the above problems and reduce the morbidity during surgery. The U.S. Patent Application for Invention Publication No. US2019069898A1 discloses a s...

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Problems solved by technology

However, the actual clinical effect is not good, and the developed pulsation algorithm cannot restore the physiological pulse well

[0004] The Chinese invention patent application with the publication number CN110636873A discloses an implantable system with a rectangular flexible membrane, which proposes a membrane that can undulate and move, which solves the above-mentioned shortcomings well. However, driving the membrane The driver for undulating motion is a Lorentz actuator (current-carrying coil winding located in the magnetic field), its driving force is limited, and the limited force density will cause significant heating of the coil and local hot spots, resulting in unstable motion good, room for improvement

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