Safe indwelling needle

Abstract

The invention relates to a safe indwelling needle. The indwelling needle comprises a catheter base, an indwelling catheter, a puncture needle and a needle base; an internal flow channel is formed in the catheter base; the indwelling catheter is arranged at the front end of the catheter base; an extension arm is arranged on the side wall of the catheter base; the indwelling needle further comprisesa compression spring, a protection component, a guide assembly and a limiting component; the compression spring is arranged in the internal flow channel; one end of the compression spring is fixed tothe catheter base, and the other end of the compression spring is connected with the guide assembly; the guide assembly is movably arranged in the internal flow channel; the limiting component is arranged in the guide assembly; a limiting hole is formed in the side wall of the catheter base; the protection component is further provided with a locking mechanism which comprises a rotatable lockingrod; the protection component is movably arranged in the internal flow channel; and a lock hole matched with the locking mechanism is further formed in the side wall of the front end of the puncture needle. The safe indwelling needle not only has an automatic rebounding function, but also has a function of preventing needle puncture injury, and the safety of the indwelling needle can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a safety indwelling needle. Background technique [0002] The indwelling needle is a medical device used for intravenous indwelling infusion. It is mainly used in clinical venipuncture to administer medicine and provide nutrition to the sick body. At the same time, it can avoid blood vessel damage caused by multiple punctures and reduce the pain of patients. The operating strength is widely used in clinical practice. [0003] Existing indwelling needles generally include a catheter base, an indwelling catheter, a puncture needle (or called a steel needle, a needle core) and an extension tube. The front end of the catheter base is connected with the inner flow channel, the side wall of the catheter base is configured with an extension arm, and the extension arm is connected with the inner flow channel, and one end of the extension tube is connected to the inner flow cha...

AI Technical Summary

Problems solved by technology

[0004] However, there are still some deficiencies in the existing indwelling needles. For example, 1. The existing indwelling needles require medical personnel to manually control the withdrawal distance according to experience. It is necessary to control the retraction distance, especially when setting indwelling needles for children, which is not only complicated and cumbersome to operate, but also cannot accurately control the retraction distance; 2. Although some indwelling needles that can prevent needle stick injuries are disclosed in the prior art, However, these indwelling needles still have problems such as complex structure and inconvenient use, which need to be further optimized and improved

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