Filter used for dispensing device or syringe and filtering method thereof

Abstract

A filter used for a dispensing device or a syringe includes an upper cone head, a lower cone head and a bidirectional liquid outlet platform installed between the upper cone head and the lower cone head. The upper cone head is internally provided with a partition for dividing an inner cavity of the upper cone head into a liquid inlet cavity and a liquid outlet cavity, the other end of the upper cone head is provided with an upper connecting piece, and the upper connecting piece is provided with an upper liquid inlet hole and an upper liquid outlet hole; the other end of the lower cone head isprovided with a lower connecting piece cooperating with the upper connecting piece and a filter member arranged on the inner side of the lower connecting piece, and a lower liquid inlet hole and a lower liquid outlet hole are formed in the lower connecting piece. One side of the bidirectional liquid outlet platform is rotationally provided with a liquid inlet plug for isolating upper liquid inlethole from the lower liquid inlet hole, and the other side of the bidirectional liquid outlet platform is rotationally provided with a liquid outlet plug for isolating the upper liquid outlet hole fromthe lower liquid outlet hole. The filter has a reasonable design and a wide application range, one-way circulation and bidirectional filtering are achieved through the independent arrangement of theliquid inlet channel and the liquid outlet channel, and the safety of infusion is effectively ensured.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a filter for a dispenser or a syringe, and also relates to a filtering method for the filter for a dispenser or a syringe. Background technique [0002] Intravenous fluids and injections are common treatments used in medicine. [0003] It is often necessary to prepare some powders and liquids together before infusion. In the actual dispensing process, when the drug solution in the vial or the drug solution in the ampoule is extracted, some 3-5 micron particles, such as crystals, are often produced during the production, storage and transportation of these commonly used powders and liquids. Particles, carbon black particles, in addition, because the bottleneck is scored with a grinding wheel, the glass fragments generated when the bottleneck is broken are easy to fall into the medicine bottle; when the solid medicine powder is dissolved in dispensing, due to the short ope...

AI Technical Summary

Problems solved by technology

In the actual dispensing process, when the drug solution in the vial or the drug solution in the ampoule is extracted, some 3-5 micron particles, such as crystals, are often produced during the production, storage and transportation of these commonly used powders and liquids. Particles, carbon black particles, in addition, because the bottleneck is scored with a grinding wheel, the glass fragments generated when the bottleneck is broken are easy to fall into the medicine bottle; when the solid medicine powder is dissolved in dispensing, due to the short operation time and the different solubility of the solid medicine powder, Some particles failed to dissolve. At the same time, when the dosing device punctures the rubber, the rubber stopper is easy to be damaged, and rubber debris enters the liquid medicine; Rubber crumbs are also pumped in. When patients are given intravenous infusion or injection, these crumbs or particles directly enter the blood of the human body, and will block the blood vessels with the blood circulation, causing harm to the patient's body and even life-threatening

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