Needle-free closed transfusion adaptor

Abstract

The invention relates to a non-needle sealing transfusion connector, which is formed by a frame (6), a liquid outlet tube (1), the sealing rings (4a, 4b), and a piston (3), wherein the edge of piston (3) is embedded with silicon rubber ring (4a) whose lower end is larger 1.5 times than upper end, while the lower end is hollow (3a) and the inner wall is smooth; the liquid outlet tube 91) has one extending part (1f) into the frame (6) whose edge of upper end is embedded with the silicon rubber ring (4b) and the upper end has hole (3C), to form the spring (5) space with the lower hollow end of piston (3); the bottom of hole (3C) has hole (1d) through to the side hole (1b) of liquid outlet tube (1); the inner wall at 2 / 3 of lower end of frame (6) has one semi-circle groove whose radius is 2mm, to form the liquid channel with the base hole (1a) of extending part (1F) and the liquid outlet tube (1); when using, the taper head of injector pushes the piston (3); the medicine liquid will flow into human body via the top incline of piston and the liquid channel; then taking out the taper head, the spring (5) will return; the gas channel will feed the passive pressure inside the piston; and the piston will generate positive pressure to inject liquid to vein to avoid solidifying blood without using anticoagulant.

Description

Technical field: [0001] The invention relates to a connector for liquid infusion, in particular to a novel needle-free airtight infusion connector which can generate instantaneous positive pressure and prevent venous return for medical purposes. Background technique: [0002] At present, in the process of intravenous infusion treatment in China, due to the limitations of the disease or the patient's own conditions, it is often necessary to repeatedly infuse the infusion for a long time or temporarily add the drug solution to the infusion pipeline several times during the infusion in a single day. In this case, It is often connected in series with a three-way tube or a heparin cap in the pipeline of the infusion set. The former is used in the treatment of multiple injections of liquid medicine in a single day infusion; the latter is used in the treatment of diseases that require long-term (multi-day continuous) infusion During the treatment, the heparin cap should be used in ...

AI Technical Summary

Problems solved by technology

But above-mentioned technology (apparatus) has certain defect and deficiency: the former all will local disinfection before each use in use, and will inject needle puncture, and this has caused certain work trouble and has been injured by needle to medical personnel. risk; the latter is often limited in clinical use due to certain diseases, and patients cannot use heparin and other anticoagulants, and there is no heparin and other anticoagulants in the heparin cap. Add a certain amount of anticoagulant into the cap with a syringe, which makes the operation more cumbersome and inconvenient

There are dozens of types of reciprocating connectors from American ICU companies, and only the CLC2000 type with a "T"-shaped three-terminal structure has the function of generating instantaneous positive pressure and preventing blood return, but its structure is complicated and expensive, and it cannot meet domestic clinical needs

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