Blood return prevention infusion connector

Abstract

The invention provides a blood return prevention infusion connector which comprises an outer connector, an inner connecting seat and an elastic barrier piece. The outer connector is hermetically connected with the inner connecting seat, the elastic barrier piece is arranged between a liquid inlet of outer connector and a liquid outlet of the inner connecting seat, the periphery of the elastic barrier piece is connected with the inner wall of the liquid inlet, the elastic barrier piece is provided with a closed portion and a liquid though port, and the closed portion covers a liquid outlet of the inner connecting seat. By the aid of the blood return prevention infusion connector, the elastic barrier piece is fixed for the first time, one-way flow of liquid medicine is realized by only depending on deformation of the elastic barrier piece, the blood return can be prevented by the infusion connector even if liquid pressure is equal to human venous pressure or the pressure difference between the liquid pressure and the human venous pressure are smaller, the connector effectively solves the problem that a blood return prevention infusion connector cannot really function in preventing blood return in prior art, so that blood return is avoided even if an infusion person optionally walks or lifts an arm in the infusion process, and clinical application is more facilitated.

Description

technical field [0001] The invention relates to a disposable medical device, in particular to an infusion joint with the function of preventing blood return, and belongs to the field of medical devices. technical background [0002] At present, the infusion sets used by domestic medical institutions for intravenous infusion are usually disposable infusion sets, which are medical consumables that have undergone aseptic treatment to establish a channel between the vein and the liquid medicine. Existing common infusion sets are generally made of needles (such as disposable intravenous infusion needles, intravenous indwelling needles, etc.), protective caps, infusion hoses, liquid medicine filters, flow rate regulators, Murphy's dropper, bottle stopper puncture It is mainly used for clinical gravity infusion, which plays a positive role in preventing cross-infection during infusion. [0003] In clinical use, medical personnel insert the bottle stopper piercer of the infusion se...

AI Technical Summary

Problems solved by technology

[0006] The present invention solves the problem that the anti-blood return infusion joint in the prior art cannot effectively realize the anti-blood return function, and further provides an anti-blood return infusion joint that can effectively prevent blood backflow and has a simpler structure

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