Puncture catheter needle assembly suitable for continuous nerve block

Abstract

The invention provides a puncture catheter needle assembly suitable for continuous nerve block. The puncture catheter needle assembly comprises a puncture catheter, a pinching handle, a puncture needle head and a non-translation driving mechanism; the tail end of the puncture catheter and the head end of the pinching handle are installed and fixed; the puncture needle head is installed in a catheter cavity of the puncture catheter and is close to the head end of the puncture catheter; the length of the puncture needle head is far smaller than that of the puncture catheter; the head end of the puncture catheter is provided with a structure used for protecting the puncture needle head and used for buffering and preventing the puncture catheter from further approaching and puncturing a compact nerve tunica vaginalis; and the non-translation driving mechanism comprises a rotating rod, and is used for driving the structure and the puncture needle head to generate relative displacement, so that the puncture needle head is accommodated in the structure. According to the invention, the safe and accurate effects are achieved on the premise that the nervous tissue is not damaged.

Description

technical field [0001] The invention relates to the technical field of medical appliances, in particular to a puncture catheter needle assembly suitable for continuous nerve block. Background technique [0002] The continuous nerve block technique refers to precisely placing a catheter near the target nerve, and injecting local anesthetic drugs near the target nerve through the opening of the catheter to achieve the purpose of anesthesia and pain treatment. The medical devices used in the continuous nerve block technique are faced with two contradictory problems of safety and precision. Safety mainly means that the puncture needle may inadvertently penetrate into the target nerve during operation and cause nerve damage. Accuracy requires that the opening of the catheter is as close as possible to or even in contact with the target nerve, which is conducive to the precise flow of drugs to the target nerve to exert its efficacy. With the application of ultrasound and other te...

AI Technical Summary

Problems solved by technology

[0004] But this scheme still has the following deficiencies: one is that the rear handle of the handle needs to be rotated during the extension and contraction of the puncture needle body, and the rear handle of the handle will move back and forth: especially when the rear handle of the handle is pushed back, the entire catheter The length of the needle becomes longer, which will not be conducive to the operation in a certain space; second, because the liquid inlet pipe passes through the back handle of the handle, the liquid inlet pipe will also rotate during the rotation of the handle back handle, which will not be easy to connect to the outside Syringe interface or clinical continuous drug delivery system; third, because the puncture needle body is all in the puncture catheter except for the space reserved for the head, this affects the injection volume and speed under the premise of a certain puncture catheter inner diameter, and also increases Manufacturing material, and then increase manufacturing cost; The 4th, because the head of puncture catheter is a flat head, although the tip of puncture needle core retracts in the port of puncture catheter, along with the head of puncture catheter pierces, still may cause puncture pain

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