Needle remaining structure of remaining needle and remaining needle

Abstract

The present invention provides an indwelling structure for an indwelling needle and the indwelling needle, wherein the indwelling structure includes a catheter base, which is provided with an accommodating cavity, and a catheter capable of accommodating a puncture needle is fixed on the cavity wall at one end of the accommodating cavity; The plug is fixedly arranged in the accommodating cavity for insertion or extraction of the puncture needle tube, and divides the accommodating cavity into a first chamber close to the catheter and in communication with the catheter, and a second chamber far away from the catheter; the first chamber To seal the chamber, the side wall is provided with a liquid inlet part that can communicate with the infusion tube, and the side wall of the accommodating chamber is provided with an installation hole; the blocking member is put into the accommodating chamber through the installation hole and connected with the accommodating chamber The wall of the cavity is fixedly connected in the axial direction, preventing the separation plug from coming out of the accommodating cavity. Since the blocking piece is inserted into the holding cavity from the mounting hole on the side wall of the holding cavity, it is convenient to install during installation, and the blocking piece is less stressed in the holding cavity, so it is not easy to be damaged and prevents the isolation plug from coming out of the catheter. The effect is not easy to fail.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an indwelling structure of an indwelling needle and the indwelling needle. Background technique [0002] The venous indwelling needle, also known as the venous trocar, is mainly composed of a soft catheter that can be indwelled in the blood vessel, a stainless steel puncture needle, an infusion joint and a connecting line. One side of the catheter is connected to the infusion joint through the connecting line. The catheter has The needle end for the insertion of the puncture needle and the insertion end pierced into the patient's body, the inner cavity of the catheter is installed with an isolation plug near the needle end, and the puncture steel needle is inserted from the needle end through the isolation plug during puncture. Go deep into the catheter and puncture into the blood vessel together with the catheter. When the catheter has completely entered the blood vessel...

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the inconvenient installation of the isolation plug blocking structure of the indwelling needle in the prior art and the defects that it is easy to break after long-term use, which leads to the failure of the blocking rubber plug to escape from the catheter, thereby providing An indwelling needle indwelling structure and indwelling needle that is convenient to install and prevents the rubber plug from coming out of the catheter and is not easy to fail

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