Anti-reflux intravenous indwelling needle

Abstract

The invention provides a novel reverse-flowing-prevention venous indwelling needle. The needle comprises an inner needle, an outer needle tube, an extension hose, a water-stopping clamp and an outer needle base. The inner needle is made of hard material and is provided with a blood returning groove, and the tail of the inner needle is connected with a puncturing needle base. One end of the extension hose is connected with a liquid injecting connector assembly, and the water stopping clamp is located outside the extension hose and used for controlling on-off of the extension hose. The first end of the outer needle base comprises a through hole, the second end of the outer needle base is connected with the other end of the extension hose, and the third end of the outer needle base comprises a seal part, and the seal part comprises an isolation combined part. The isolation combined part comprises two or more components. According to the novel reverse-flowing-prevention venous indwelling needle, because an isolation plug made of rubber silicon material is used, the risk of fracturing the outer needle rear base through propping is avoided; after being pulled out, the inner needle can puncture into the vein again through the isolation plug, intravenous dripping is achieved, and besides various operations such as blood drawing and pressure testing are convenient to perform.

Description

technical field [0001] The invention relates to a medical indwelling needle, in particular to an anti-reflux venous indwelling needle. Background technique [0002] Intravenous infusion is widely used in clinical practice, but each intravenous infusion requires skin puncture. For patients who need long-term infusion, it not only increases the suffering of patients, increases the workload of nurses, but also causes greater infection risk. [0003] In order to solve these problems, indwelling needles are often used clinically for patients who need long-term infusion and critically ill patients, and multiple infusions can be performed after one puncture. The structure of existing venous indwelling needle or anti-reflux venous indwelling needle is as attached figure 1 As shown, it generally includes an inner needle 1, an outer needle tube 2, a sheath 3, a Y-shaped outer needle seat 4, a puncture needle seat 6, an isolation plug 7, a water stop clip 9, and an infusion tee tube ...

AI Technical Summary

Problems solved by technology

[0007] In view of the above-mentioned various shortcomings of the existing indwelling needles, the purpose of the present invention is to provide a new type of anti-reflux venous indwelling needle, which is used to solve the problems of easy cracking of the outer needle seat of the existing indwelling needles, single function, and easy extension of the tube. Damage, easy to cause skin allergies and other problems

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