Self-destruction type filtering injector

Abstract

The invention relates to the field of medical apparatus and instruments and discloses a self-destruction type filtering injector. The self-destruction type filtering injector is characterized in that: a needle cylinder is in an irregular shape and comprises a front part, a back part and a connection surface; the internal diameter of the front part is more than the internal diameter of the back part; a filtering device is arranged at the front top part of the needle cylinder; a resilience sheet is connected with the back of the filtering device; and a piston is in a self-destruction structure and is connected with a push rod. When liquid is injected by the self-destruction type filtering injector, the push rod is pulled so that the filtering device is moved backwards and the liquid enters due to a negative pressure; by stopping pulling the push rod, the filtering device is returned back through the resilient sheet; and positive pressure is formed by pushing the pull rod so that the liquid is discharged through the filtering device. After the liquid is discharged, the piston enters into a 'clamping position' so that the piston is separated and destructed by itself by pulling the push rod back. According to the self-destruction type filtering injector disclosed by the invention, the damage to the human body caused by insoluble particles is avoided or reduced by filtering the insoluble particles in the liquid, and the self-destruction type filtering injector is destructed by itself after being used, thereby preventing the injector from being repeatedly used and avoiding the transmission of hematogenous diseases.

Description

technical field [0001] The invention relates to the field of medical equipment, in particular to a self-destruction filter syringe. Background technique [0002] Traditional medical syringes are generally composed of a syringe, a push rod and a piston, which only have the functions of absorbing liquid and injecting liquid, and do not have the function of filtering the liquid to be injected and removing insoluble particles in the liquid. Insoluble particles of special medicines in human blood vessels will cause red blood cells to gather on the particles, forming thrombus and causing vascular embolism and phlebitis. It can also directly cause blockage of local blood vessels, tissue hypoxia and even necrosis. Insoluble particles enter the pulmonary capillaries as foreign matter, causing allergic reactions, and macrophages in the body proliferate to surround the particles, forming intrapulmonary granulomas. The organs that are most susceptible to blockage and damage by insolub...

AI Technical Summary

Problems solved by technology

Moreover, common medical syringes can easily cause the spread of blood-borne diseases (such as hepatitis B, AIDS, etc.) among the crowd because they can be reused.

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