Remaining needle capable of providing positive pressure continuously and application method thereof

Abstract

The invention relates to a remaining needle capable of providing positive pressure continuously. The remaining needle comprises a transfusion joint, an extension flexible pipe, a puncture needle, a puncture needle base and a catheter assembly, the transfusion joint is connected with a catheter base through the extension flexible pipe, the extension flexible pipe is provided with a positive pressure device, the positive pressure device comprises a base and a rolling wheel, a transfusion groove is formed between the base and the rolling wheel, the extension flexible pipe passes through the transfusion groove, guide rails are arranged at the two sides inside the base of the positive pressure device, two or more pairs of rolling wheel location devices are arranged on the guide rails at the two sides, and the cross section of the inlet end of the transfusion groove is larger than that of the outlet end of the transfusion groove; as for the base and the rolling wheel, when the rolling wheel is pushed to the outlet end of the base, the gap between the bottom of the rolling wheel and the base takes up 70%-80% of the double wall-thickness of the extension flexible pipe; the extension flexible pipe is made of high molecular materials which are high in elasticity, and the wall thickness of the extension flexible pipe ranges from 0.35 mm to 0.45 mm. By means of the remaining needle, embolism in the catheter can be avoided, the catheter sealing effect is good, the operation is convenient and fast, and the retention time is effectively prolonged; in addition, it is facilitated to judge the catheter blocking condition.

Description

[technical field] [0001] The invention relates to the technical field of medical devices, in particular to an indwelling needle capable of providing continuous positive pressure, without sealing the tube, and avoiding catheter blockage during indwelling, and a method for using the same. [Background technique] [0002] Existing intravenous infusion needles are easy to puncture blood vessels during infusion, and must be replaced every time. The invention and application of the venous indwelling needle overcomes these shortcomings. After the venipuncture is completed, the needle core needs to be pulled out, leaving only the cannula, so the blood vessel will not be damaged, and it can be used continuously for several days in the blood vessel. At the same time, the use of venous indwelling needles can also reduce the pain caused by repeated venipuncture of patients, reduce the workload of nurses, and facilitate clinical medication. Therefore, venous indwelling needles are widely ...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the above problems by providing a simple operation and simultaneously solving the problem of blood return during indwelling, that is, having positive pressure performance and avoiding blood coagulation and blockage caused by blood returning during indwelling, thereby shortening the technical problem of indwelling time , design an indwelling needle with a novel structure that can provide continuous positive pressure during the indwelling time

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