Remaining needle with quick blood returning function

Abstract

The invention provides a remaining needle with a quick blood returning function. The remaining needle comprises a puncture needle, a puncture needle tube connected with the puncture needle, a needle seat and a catheter seat. The puncture needle tube is fixedly mounted on the needle seat. The catheter seat is connected with the needle seat and internally provided with a cavity. The remaining needle is characterized in that the catheter seat is made of a transparent material, the puncture needle tube extends into the cavity of the catheter seat to be plugged into the needle seat, and a first through hole, formed in the tube wall of the puncture needle tube, is further formed in the cavity of the catheter seat and used for puncturing the needle tube to enable the same to be communicated with the cavity of the catheter seat. In this way, when a medical worker punctures the vein of a patient, the blood of the patient flows into the cavity of the catheter seat, made of the transparent material, through the puncture needle and the first through hole, and by observing whether or not the blood returning occurs in the first through hole, the medical worker judges whether or not the puncture needle punctures into the vein of the patient.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to an indwelling needle with a sensitive blood return function. Background technique [0002] An indwelling needle is a medical device used for multiple infusion therapy within a certain period of time. Because the catheter is soft and elastic, when the catheter is indwelling in the blood vessel, the catheter will bend synchronously with the blood vessel, so that the part where the catheter is indwelling can still move freely without the risk of puncturing the vein. Therefore, compared with ordinary scalp needles, using indwelling needles for infusion is safer and reduces discomfort for patients during infusion. [0003] However, the indwelling needles in the prior art have some deficiencies in terms of processing and performance. For example, the Chinese Utility Model Patent No. 03250617.1 discloses a venous indwelling needle that can quickly see the return of blood. The indwelling...

AI Technical Summary

Problems solved by technology

[0006] For the current indwelling needle, because the blood of the indwelling needle needs to enter the closed space 106 of the indwelling needle through the indwelling needle gap 104, the requirements for matching the size of the indwelling needle 102 and the indwelling needle outer tube 103 are very high, which also increases the pressure of the indwelling needle. manufacturing cost

During the use of the indwelling needle, sometimes the closed space 106 between the puncture needle and the catheter is too narrow, which makes it difficult for the blood to pass through the indwelling needle during puncture, so that it is difficult to observe the return of blood, so that the medical staff cannot judge whether the needle tip is Puncture into the blood vessel, resulting in the failure of the puncture operation, especially for small-sized indwelling needles, the probability of occurrence is higher

Since the cross-sectional size of the indwelling needle catheter is fixed, in order to solve this problem, some manufacturers use puncture needles with smaller outer diameters to increase the gap between the puncture needle and the catheter. At the same time, it brings the disadvantage that the steel needle is too soft and difficult to operate when puncturing.

Therefore, existing indwelling needles, especially small-sized indwelling needles, always have the disadvantages of not being easy to return blood when punctured, or difficult to operate

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