Safety self-destructive intravenous infusion needle

Abstract

The invention relates to a safety self-destructive intravenous infusion needle. A self-destructive mandrel and a needle seat are integrally formed, one end of the self-destructive mandrel connected with the needle seat is a small end axially facing the needle seat, and the other end is a large conical end. The cavity of a protection pipe is provided with a self-destructive mandrel positioning shrinkage hole corresponding to one end of an infusion end of the self-destructive mandrel, a limit step is formed at the junction of the self-destructive mandrel positioning shrinkage hole and the cavity of the protection pipe, the needle seat is provided with a positioning shaft section sliding into the self-destructive mandrel positioning shrinkage hole, and the outer diameter and the axial length of the positioning shaft section are matched with the self-destructive mandrel positioning shrinkage hole. One end face of the positioning shaft section is a breakage end face connected with the conical end of the self-destructive mandrel, an annular cut with the triangular section is formed between the breakage end face and the self-destructive mandrel through the conical end, the other end of the positioning shaft section is provided with an annular limit projection, and the annular limit projection can slide into the cavity of the protection pipe to be in limit match with the limit step. The safety self-destructive intravenous infusion needle has the advantages of simple structure, convenience in machining, good operational continuity, safety and reliability.

Description

technical field [0001] The invention relates to the technical field of medical devices, and is a safe self-destruction intravenous infusion needle that can only be used once. Background technique [0002] Since the end of the last century, due to social and technological reasons, unsafe infusion has become one of the main ways for the cross-transmission of various infectious diseases in humans, which seriously endangers human health. The full realization of safe infusion has become an important link in safeguarding public health. [0003] According to the definition of the World Health Organization, the so-called safe infusion should include three aspects: first, it is harmless to those receiving the infusion; second, it does not pose any danger to health care personnel; third, the waste generated by the infusion does not pose a hazard to society. This requires that the infusion needle must have corresponding safety features: [0004] 1. After the infusion needle is used o...

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Problems solved by technology

[0005] 2. After the infusion needle is used once, its exposed needle tip is hidden

However, the venous needle with the above structure still has a broken structure and an unreasonable design of the anti-retraction structure, as follows:

[0009] Its breaking structure is an incision in the middle of the hard catheter, and the hard catheter has the function of infusion. It is a hollow tube, which is limited by the overall volume of the infusion needle and ensures the infusion patency of the hard catheter. The wall thickness of the hard catheter is relatively thin, and the incision The design is inconvenient, if the incision is too shallow, it will be inconvenient to break later, if it is too deep, it will affect the assembly and use

[0010] Secondly, after the hard catheter is broken, the hard catheter is pulled out for a long distance, and the broken mouth of the hard catheter is exposed. There is also a risk of the cleaning staff being injured by the broken mouth during the operation.

[0011] Moreover, the anti-retraction structure on the infusion needle adopts the tab and the boss (the reference number 15 in the literature) provided in the protective tube, so that the large head of the needle seat is stuck on the socket boss and cannot move downwards, and at the same time, the socket tab is pressed against the needle seat. On the small head, not only is the back-stop structure complex and inconvenient to process, but the design of the incision and the back-stop structure on it are highly independent and have no synergistic effect. In actual use, after the incision on the hard catheter is pulled out of the protective tube However, the anti-retraction structure between the needle seat and the protective tube set on the hard catheter is not in place. There is a problem that the operator breaks the hard catheter in advance, but the anti-retraction structure is not in place. The exposed part of the hard catheter will accidentally push the needle tip back, causing safety accidents

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