Filter type syringe

A syringe and filter technology, which is applied in the field of filter syringes, to achieve the effect of avoiding and reducing harm to the human body
CN102406971AInactive Publication Date: 2012-04-11雷红力
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
雷红力
Publication Date
2012-04-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a filter type syringe which relates to the field of medical syringes. The filter type syringe comprises a needle cylinder, a push rod, a piston, a filter membrane device and elastic pawls, wherein the top end in the needle cylinder is provided with the filter membrane device; the inner wall of the needle cylinder is provided with a plurality of elastic pawls for ejecting the rear edge of the filter membrane device which can move along the axial direction of the needle cylinder. In the injecting process, the piston is drawn to generate negative pressure so that the filter membrane device draws back, and liquid enters the needle cylinder from a flow guide opening. The piston stops being drawn, and the filter membrane device is returned in situ under the elastic pawls. The piston is pushed to generate positive pressure, and the liquid is exhausted by a filter membrane, thereby insoluble particles in injecting liquid are removed through filtration and the damage of the insoluble particles to human bodies is eliminated and removed.
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Description

technical field

[0001] The invention relates to the field of medical syringes, in particular to a filter type syringe. Background technique

[0002] Traditional medical syringes are generally composed of a syringe, a push rod and a piston, which only have the function of absorbing liquid for injection, 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 insoluble particles include ...

Claims

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