Device for assisting the heart when failure

Abstract

The invention provides a device for assisting a heart in functional failure. The device comprises a motor, a coupler, a driving rotor, a driven rotor, a catheter, a driving shaft and a pump, wherein the coupler is detachably jointed with the motor, the driven rotor is arranged in the coupler, the near end of the catheter is connected to the coupler, the driving shaft penetrates through the catheter and is driven by a rotor shaft, and the pump is driven by the driving shaft to pump blood. The driving rotor comprises a first bracket connected to the output shaft of the motor and a driving piece arranged on the first bracket; the driven rotor comprises a rotor shaft and a driven piece arranged on the rotor shaft and coupled with the driving piece. One of the driving piece and the driven piece is a magnetic force providing element, the other is a conductor, and a gap is formed between the driving piece and the driven piece.

Description

【Technical field】 [0001] The invention relates to a device for assisting the heart when its function fails, and belongs to the technical field of medical devices. 【Background technique】 [0002] Heart failure is a health problem with a high mortality rate. Taking cardiogenic shock as an example, the ejection performance of the left ventricle of the patient is significantly weakened, and the weakened coronary blood supply may lead to irreversible heart failure. Therefore, for this case, temporary interventional support (ventricular assist) will partially or mostly replace the pumping function of the left ventricle and improve coronary blood supply. [0003] In existing ventricular assist devices, due to the requirement of liquid sealing (preventing the perfusate from entering the motor), it is relatively common to use magnetic coupling to transmit the power of the motor to the drive shaft. Specifically: the active magnet provided on the output shaft of the motor is coupled ...

AI Technical Summary

Problems solved by technology

[0007] 2. Based on the principle of magnetic coupling, it is difficult or even impossible to achieve complete rerotation after the resistance disappears after the impeller is greatly decelerated due to the blocked rotation

This is obviously detrimental to the clinical need to provide continuous ventricular assist to subjects

[0008] Furthermore, without the use of other automated detection methods to feedback the decrease in blood flow due to the large speed reduction of the impeller, generally it can only be judged by humans through observation and experience

Moreover, even after the resistance disappears, human intervention is required to achieve reversion

This is also unrealistic for the tense medical resources and complex clinical environment usually faced by the high-risk application scenario of ventricular assistance

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