Spirally-curled adjustable variable-diameter infusion needle

Abstract

The invention discloses a spirally-curled adjustable variable-diameter infusion needle and solves the problem of unnecessary injuries to patients due to failure in effective needle inserting of infusion needles in the prior art. Size variation of an infusion needle head can be realized; by adjustment of a spirally-curled degree of the needle head before needle inserting, the size of the needle head can be decreased to make it convenient for needle inserting and alleviate pains in needle inserting; by adjustment of the spirally-curled degree of the needle head again after needle inserting, thesize of the needle head can be increased to realize normal infusion. The technical scheme includes that the infusion needle comprises a needle holder and the needle head, one end of the needle head isfixed to the needle holder, and the cross section of the needle head is spiral while a longitudinal section of the needle head is in a laminated structure. A limiting part is arranged at the fittingposition of the needle holder and the outmost layer of needle head, the limiting part is tightly abutted against the outmost layer of the needle head to tighten adjacent layers of the needle head so as to make the needle head in a small-diameter state, and the limiting part drives the outmost layer of the needle head to expand outwards to generate gaps among adjacent layers of the needle head so as to make the needle head in a large-diameter state.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a helically coiled adjustable variable-diameter infusion needle. Background technique [0002] Intravenous infusion is a method of injecting a large amount of sterile liquid, electrolytes, and drugs into the body through the vein using the principles of atmospheric pressure and hydrostatic pressure. At present, intravenous infusion is carried out into the human body through infusion tubes and infusion needles. The diameter of infusion needles used by adults is generally 0.6-0.8 mm, and the diameter of infusion needles used by children is generally about 0.5 mm. It is necessary to puncture the back of the human body with the infusion needle when performing intravenous injection, but some patients have very thin blood vessels, and cannot quickly and accurately penetrate the blood vessels when the needle is inserted. The current infusion needles cause strong tingling pain to...

AI Technical Summary

Problems solved by technology

It is necessary to puncture the back of the human body with the infusion needle when performing intravenous injection, but some patients have very thin blood vessels, and cannot quickly and accurately penetrate the blood vessels when the needle is inserted. The current infusion needles cause strong tingling pain to the patients; The subcutaneous fat is relatively thick, and the blood vessels on the back of the hand are not easy to see. In addition, the limbs are short, and the puncture site is often close to the joints, which is not easy to fix, and it is very easy to cause leakage and unnecessary pain to the child. Therefore, the infusion of children is usually injected into the scalp vein. , but the blood vessels in the scalp of children are also very thin, and the current infusion needles for children cannot be inserted quickly and accurately. In addition, the skin of children is delicate, and it is easy for the needle to go out of the blood vessels and cause local swelling or subcutaneous congestion.

[0003] To sum up, for pediatric patients or adult patients with thinner blood vessels, the infusion needles in the prior art cannot effectively insert the needle, which may cause unnecessary harm to patients, and there is still no effective solution.

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