Puncture flow-limiting internal fistula

Abstract

The invention relates to the field of medical instruments, and particularly discloses a puncture flow-limiting internal fistula. The puncture flow-limiting internal fistula comprises a puncture part with a pipe sleeve, a passing groove, wing plates and guide plates, a first silica gel layer, a second silica gel layer, a catheter, indwelling needles each of which is provided with a needle handle and a needle head, a soft film disc with a metal wire, a skin sleeve with a pre-incision line and an artificial blood vessel. The catheter with the indwelling needles at the two ends is used for performing connection fistulization on arteriovenous blood vessels of a patient, the indwelling needles can limit the flow of blood flow, and heart failure of the patient caused by too high venous blood return speed can be prevented; the soft film disc with the metal wire on the needle head is bound through the skin sleeve, after puncture, an indwelling needle hook can be fixed on the blood vessel wall only by tearing the skin sleeve, so that the indwelling needle hook can be conveniently fixed with arteriovenous blood vessels; and through the puncture part with the guide plates, medical staff can insert a hemodialysis needle into the catheter more easily and conveniently, sealing is performed through the silica gel layers, and compared with a traditional artificial blood vessel, the puncture flow-limiting internal fistula has the longer service life.

Description

technical field [0001] The invention belongs to the field of medical instruments, in particular to a puncture flow-limiting internal fistula. Background technique [0002] The prerequisite for hemodialysis is to have a vascular access. Through the vascular access, the patient's blood is drawn out from the artery according to a certain flow rate, and then flows back into the body from the vein after passing through the dialyzer. This is the vascular access of the hemodialysis patient. There are two main ways of access, one is fistula blood vessel, the other is hemodialysis catheter, fistula blood vessel is the main way, about 80% of maintenance hemodialysis uses this way, fistula blood vessel (autologous arteriovenous fistula / graft The blood flow of fistula) is usually greater than 600ml / min. During the treatment, puncture and drainage of blood with internal fistula needle can meet the requirement of dialysis blood flow (200~300ml / min). Arteriovenous fistula) is established ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a puncture flow-limiting internal fistula, so as to overcome the existing arteriovenous internal fistula. During the use process, the patient's heart failure is easily caused due to excessive venous blood return, and the damage of the artificial blood vessel during puncture is large. Life expectancy is reduced, it is difficult for medical staff to find the correct puncture position, and it is inconvenient to fix artificial blood vessels and arteriovenous blood vessels during fistula, etc.

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