Automatic resorption type antipollution medicine adding syringe

Abstract

The invention discloses an automatic resorption typed pollution prevention injector for adding medicine, comprising a syringe, a swing plate arranged at the rear end of the syringe, a piston arranged in the syringe, and a guide cover arranged at the rear end of the syringe. The injector is characterized in that: a cylindrical push rod is drilled through the middle of the guide cover and is connected with the piston, an air filter is connected with the rear end of the syringe, the air filter is communicated with the intracavity of the syringe; wherein, an elastic piamater sleeve is arranged on the external periphery of the cylindrical push rod between the guide cover and the piston, the natural length of the elastic piamater sleeve is shorter than the stroke of the piston in the syringe; the automatic resorption typed pollution prevention injector is used for blending injected medical solution. The injector has the advantages of labor saving and convenient use.

Description

technical field [0001] The invention relates to a syringe, in particular to an automatic back-suction anti-pollution drug-dosing syringe used for medicinal liquid preparation. Background technique [0002] At present, the commonly used dosing syringes in hospitals are ordinary syringes, which are composed of a syringe, a piston and a push rod. During operation, medical staff push and pull the piston to move through the push rod to realize operations such as suctioning and mixing the medicinal liquid. However, in actual use, it has been found that when medical staff perform operations such as suctioning and mixing medicinal liquid, their fingers will touch the push rod, and there is a possibility of cross-infection by bringing harmful substances such as bacteria into the medicinal liquid. In order to avoid the contamination of liquid medicine when medical personnel use the syringe, someone proposed to add a protective sleeve outside the push rod to solve the above technical p...

AI Technical Summary

Problems solved by technology

However, in actual use, it has been found that when medical staff perform operations such as pumping and mixing medicinal liquid, their fingers will touch the push rod, and there is a possibility of cross-infection by bringing harmful substances such as bacteria into the medicinal liquid.

In order to avoid the contamination of liquid medicine when medical personnel use the syringe, someone proposed to add a protective sleeve outside the push rod to solve the above technical problems, but it is difficult to popularize and apply due to the complex structure, high manufacturing cost and inconvenient one-handed use. , thus no syringe that can effectively prevent contamination has been applied

Chinese patent ZL200720051360.X (publication number CN201022886Y, published on February 20, 2008) discloses a "built-in anti-pollution syringe". The filter communicates with the inner cavity of the syringe to achieve the purpose of avoiding cross-contamination. This technical solution provides a technical solution with a relatively simple structure. The push rod is relatively difficult, and it needs to use a large force to suck the liquid medicine, and there is still the disadvantage of inconvenient use

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