Axial flow ventricular auxiliary device with external drive

Abstract

The application provides an axial flow ventricular auxiliary device with an external device. The device comprises a driving mechanism, a transmission shaft, an impeller and a catheter. The catheter sleeves the outer side of the transmission shaft, and the driving mechanism is arranged at a proximal end of the transmission shaft, and is connected to the impeller through the transmission shaft; the catheter comprises a guiding section and a blood pumping section for blood circulation, the guiding section is fluidly isolated from the blood pumping section, the blood pumping section is arranged at a distal end of the catheter, and the impeller is arranged in the blood pumping section; and a cavity in the blood pumping section forms a blood flow channel, and the two ends of the blood flow channel are respectively provided with a blood flow inlet and a blood flow outlet. The driving mechanism of the device is arranged outside a human body, so that the adverse effect of heat generated during the driving process of the driving mechanism on the human body is avoided. At the same time, since the driving mechanism does not need to be implanted into the human body, the size of the driving mechanism is not limited by the size of the catheter, and sufficient power can be provided for the blood pumping process.

Description

technical field [0001] The invention relates to the technical field of medical devices, and in particular to an externally driven axial flow ventricular assist device. Background technique [0002] Heart failure (heart failure for short) refers to a class of diseases caused by the failure of the pumping function of the heart to fully discharge the blood from the venous return to the heart. It can be divided into acute heart failure and chronic heart failure. Acute heart failure refers to the acute attack or exacerbation of abnormal left ventricular function, which is often life-threatening and requires emergency rescue. Chronic heart failure refers to the persistent state of heart failure, which is usually worsened by poor medical treatment. [0003] At present, heart transplantation is the best way to treat chronic heart failure, but there is a serious shortage of donors. For example, in the United States, more than 50,000 patients are registered in hospitals each year wa...

AI Technical Summary

Problems solved by technology

However, the internal structure of miniaturized motors is more complex and compact, the cost is higher, and the operation stability cannot be compared with conventional motors

In addition, the motor itself is fixed as a rigid and non-bendable part, and the impact on the difficulty of the operation can only be avoided by reducing its own volume as much as possible.

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