Novel vein needle with quick, sensitive and visible blood returning functions

Abstract

The invention relates to a novel vein needle with a quick, sensitive and visible blood returning function. The novel vein needle comprises a needle base, a needle base handle, a needle body, a needle body protective cover and an elastic connecting hose. The novel vein needle is characterized in that the elastic connecting hose and the needle base are made of transparent materials; and the cross section of the elastic connecting hose is elliptical. The novel vein needle further comprises a steel safe sleeve, a sleeve base, a sleeve base handle, a self-locking elastic piece connected to the rear end of the sleeve base and a limiting tooth arranged on the inner side face at the rear end of the self-locking elastic piece. The elastic connecting hose is an elliptical hose, and compared with a circular hose, the deformation of the elliptical hose is remarkably greater than that of the circular hose under a same venous pressure, so that the quick capacity-increasing pressure of the connecting hose is reduced to form a larger pressure difference, so as to increase the flowing speed of venous blood to the connecting hose and prolong the visible flowing length of venous blood, therefore, quick, sensitive and visible blood return is realized. In addition, the novel vein needle further has the blood vessel puncture preventing function, the seep preventing function, the separation preventing function and the function of preventing accidental injury caused by the rear part of the needle.

Description

technical field [0001] The invention belongs to the application field of medical clinical venous needles, in particular to a novel venous needle with fast, sensitive and visual blood return function, which is mainly used for one-time ordinary venous infusion, vacuum venous blood collection and venous drug injection. Background technique [0002] Medical clinical venipuncture is mainly used in the following four fields: 1. The field of venous vacuum blood collection; 2. The field of intravenous drug liquid injection; 3. The field of one-time ordinary intravenous infusion; 4. The application of special intravenous indwelling needles to achieve multiple The field of special infusion many times a day. The first three have the characteristics of one-time short-term use in common, so the venous needles used are similar, and all adopt steel venous needles. Although it has the characteristics of simple structure, low cost of use, convenient and fast operation, it cannot be applied ...

AI Technical Summary

Problems solved by technology

[0004] 1. The mainstream ordinary venous needles do not have the function of anti-puncture blood vessels. In clinical practice, sometimes due to unskilled nurses or poor cooperation of patients, venous needles may puncture blood vessels, resulting in venipuncture failure. Venipuncture must be repeated

Although individual products have this function, they have the disadvantage of inconvenient operation.

[0005] 2. During infusion or blood collection, the phenomenon of the needle protruding from the blood vessel sometimes occurs, which is commonly known as "bulging", which leads to failure and must be re-punctured.

This kind of phenomenon often occurs when the patient's blood vessels are difficult to puncture (such as blood vessels are not thick, curved or straight, too thin or too flat), and because nurses are afraid of puncturing the blood vessels, they dare not put the needle into the blood vessels. The actual distance of the needle in the blood vessel is too short, and the patient may move slightly or have a slight pull, which may cause the needle to come out.

[0006] 3. Leakage sometimes occurs during infusion. The main reason is that the width of the needle cutting edge on both s

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