Flow-limiting device for high-flow internal arteriovenous fistula

Abstract

The invention relates to a flow-limiting device for high-flow internal arteriovenous fistula. The device includes a C-shaped hoop, an infusion port and a liquid aspirator; the C-shaped hoop is used tobe clamped onto a venous blood vessel or artificial blood vessel for internal fistula, an elastic balloon is arranged on the inner peripheral surface of the C-shaped hoop, the elastic balloon communicates with the infusion port, the infusion port is used to be inserted into a human body, and the infusion port communicates with the interior of the elastic balloon through a catheter; and the liquidaspirator includes a liquid suction pump, a suction tube and a puncture needle, a suction opening of the liquid suction pump is connected to one end of the suction tube, the other end of the suctiontube is connected to the puncture needle, and the puncture needle is used to be inserted from outside the body and is connected to the infusion port. The device is ingenious in structure, reasonable in design and convenient to use, the elastic balloon on the C-shaped hoop holds the venous blood vessel or artificial blood vessel tightly, the infusion port is implanted into the patient body, the device can realize blood flow adjustment only by simple puncture, and has less trauma, the blood flow is not affected by factors such as blood pressure, so that the device can achieve accurate flow limiting.

Description

technical field [0001] The invention relates to an instrument for arteriovenous fistula, in particular to a high-flow arteriovenous fistula flow limiting device, which belongs to the technical field of medical instrument design. Background technique [0002] Arteriovenous fistula is the "lifeline" for patients with uremia. However, in some patients, the arteriovenous fistula flow is too large, causing cardiac insufficiency or extremity steal syndrome, which is a serious complication of hemodialysis patients. Clinically, at present, the method of surgical "flow limitation" is adopted for high-flow arteriovenous fistula, that is, the arteriovenous anastomosis is bundled with sutures or artificial materials are used to make the lumen smaller and the blood flow reduced. However, this flow-limiting method has the following disadvantages: first, the blood flow may be reduced due to the small lumen, and normal hemodialysis or fistula occlusion may not be maintained; second, the bl...

AI Technical Summary

Problems solved by technology

However, this flow-limiting method has the following disadvantages: first, the blood flow may be reduced due to the small lumen, and normal hemodialysis or fistula occlusion may not be maintained; second, the blood flow may still be large because the lumen is not narrowed enough, Can't achieve expected effect

However, since such an operation requires surgical incision, there will be trauma, and the blood flow is also affected by factors such as blood pressure. In fact, it is impossible to achieve accurate "flow limitation". Surgical incision, causing pain to the patient

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