Positive-pressure joint for needleless medicated transfusion

Abstract

The invention discloses a positive-pressure joint for needleless medicated transfusion, belonging to the field of medical apparatus and instruments. The positive-pressure joint comprises a rubber plug inner core, a hollow rubber plug, a connecting tube socket and a shell of which the upper and lower ends are through, wherein the connecting tube socket and the lower end of the shell are in connected in a sleeving mode, and a horizontal flow guiding groove, which divides the bottom face of the internal wall of the connecting tube socket horizontally and equally, and two exhausting through holes, which are correspondingly located at the two sides of the horizontal flow guiding groove, are formed in the bottom face of the internal wall of the connecting tube socket; a transfusion tube is inserted to the middle part of the horizontal flow guiding groove; a rubber plug shell which is coaxial with the shell is arranged in the shell, the top face of the rubber plug shell is lower than the top face of the shell, the hollow rubber plug is coaxially located in the rubber plug shell and is supported by the bottom face of the internal wall of the rubber plug shell, sealing structures are respectively formed between the outer circumferential wall of the hollow rubber plug and the inner circumferential wall of the shell and between the outer circumferential wall of the hollow rubber plug and the inner circumferential wall of the rubber plug shell, and two exhausting pipes are further arranged at the bottom of the rubber plug shell and are connected with the two exhausting through holes correspondingly in an inserting mode; at least one longitudinal flow guiding groove which can be communicated with the horizontal flow guiding groove is formed between the radial direction of the outer circumferential wall of the rubber plug shell and the radial direction of the inner circumferential wall of the shell.

Description

technical field [0001] The invention relates to a positive pressure connector for needle-free drug-dosing transfusion in the field of medical equipment. Background technique [0002] The needle-free drug dosing infusion positive pressure connector is mainly used for injection of liquid medicine, gravity infusion, and liquid extraction in medical treatment. It can be connected with intravenous infusion sets, intravenous catheters and other injection devices. Pollution of particles and debris from human capillaries. When the injection device is pulled out, the needle-free drug-dosing infusion positive pressure connector generates a positive pressure, which automatically pushes the liquid in the intravenous infusion set, intravenous catheter, etc. forward, preventing blood backflow and the formation of thrombus. The main problem of the current positive-pressure connector for needle-free drug-adding infusion is that when the injection device is pulled out, the positive pressure...

AI Technical Summary

Problems solved by technology

The main problem of the current positive-pressure connector for needle-free drug-adding infusion is that when the injection device is pulled out, the positive pressure provided by the needle-free drug-adding infusion positive-pressure connector is insufficient, resulting in a large amount of liquid medicine remaining in the positive-pressure connector for needle-free drug-adding infusion In this way, a large amount of liquid medicine is wasted, which can affect the accuracy of the dosage and delay the treatment of patients.

At the same time, there is still a metal structure inside the positive pressure connector for needle-free drug dosing infusion, which will affect the accuracy of the inspection results when performing MRI examinations

Another point is that the current positive-pressure connector for needle-free drug dosing infusion, such as the positive-pressure connector for needle-free drug-adding infusion described in the invention patent application number 201310644662.9, has a T-shaped shape, that is, needle-free drug dosing The infusion port and the air discharge port of the infusion positive pressure connector are separated. Such a design is not highly recognized by the market. At the same time, it is inconvenient to use clinically. It is impossible to add medicine at the same time.

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