Negative pressure assistor of syringe

Abstract

The negative pressure assistor comprises the syringe and a negative pressure assisting structure, wherein the negative pressure assisting structure sleeves the tail end of the syringe and is detachable; the negative pressure assisting structure comprises a semi-cylindrical cylinder, a finger limiting block, a pusher, a connecting plate and a pressing ring, wherein the semi-cylindrical cylinder isdetachable, the finger limiting block is arranged on the semi-cylindrical cylinder, one end of the pusher is arranged in the semi-cylindrical cylinder, the other end of the pusher outstretches the semi-cylindrical cylinder, the connecting plate is matched with the semi-cylindrical cylinder and is fixedly connected with the end, arranged in the semi-cylindrical cylinder, of the pusher, and the pressing ring is arranged at the other end of the pusher; and a locating slot matched with the syringe is formed in the semi-cylindrical cylinder, and a connecting slot matched with the syringe is formedin the connecting plate. The invention discloses a negative pressure assistor of a syringe. The negative pressure assistor can excellently assist work of the syringe, and thus, secondary injury to a sufferer cannot be caused during use; and when subatmospheric fine-needle aspiration biopsy is carried out on a thyroid, the syringe can be stable in operation and accurate in puncture, the working efficiency is increased, injury to the sufferer is reduced, the magnitude of negative pressure can be excellently controlled, and discharging of contents is convenient.

Description

technical field [0001] The invention relates to the technical field of auxiliary tools for syringes, in particular to a negative pressure auxiliary device for syringes. Background technique [0002] A syringe is a common medical device. As early as the 15th century, the Italian Catinelle proposed the principle of the syringe. Mainly used for injecting liquid medicine or drawing liquid. Syringes are also used in medical equipment, containers, and scientific instruments such as some chromatography to inject through a rubber septum. Injecting gas into a blood vessel can cause an air embolism. The way to remove air from the syringe to avoid embolism is to invert the syringe, tap it gently, and squeeze out a little fluid before injecting into the bloodstream. The gas or liquid is withdrawn or injected mainly with a needle. Syringes are also used in medical equipment, containers, and scientific instruments such as some chromatography to inject through a rubber septum. [000...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the invention is to provide a syringe negative pressure auxiliary device, which solves the problem that when a single person performs a thyroid fine needle biopsy with negative pressure, the existing syringe is not stable enough during operation, which easily affects the secondary injury to the patient during the puncture. Inconvenient problems when controlling the size of the negative pressure and discharging the contents

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