Filter for medical infusion set

Abstract

The invention relates to a filter for a medical infusion set, and belongs to medical instruments. A liquid inlet pipe of a liquid inlet shell is communicated with a liquid inlet hole formed in the bottom of the liquid inlet shell, and a liquid outlet pipe of a liquid outlet shell is communicated with a liquid outlet hole in the upper end of the liquid outlet shell; exhaust holes are formed in the upper end of the liquid inlet shell, an exhaust film is welded to the corresponding exhaust hole, and a hydrophilic filtering film is installed on the inner surface of the liquid outlet shell. The filter has the advantages that liquid is fed from the lower portion and discharged from the upper portion, bubbles are pushed by the liquid rising gradually to the upper portions of the shells to be exhausted through the exhaust holes, and bubbles are not generated on a liquid outlet; the hydrophilic filtering film is sealed and fixed through a flexible annular elastic body, the welding working procedure is omitted, the assembly accuracy is reduced, and the complex assembly procedure is simplified; no bubble dead angle exists on the convex spine part, sensitive exhaust and intermittent welding are achieved, welding stress is reduced, and the side faces of the shells are prevented from leaking; the liquid medicine can be automatically stopped by the hydrophilic filtering film to achieve automatic liquid stop.

Description

technical field [0001] The invention belongs to medical instruments, in particular to a filter for a medical infusion set. Background technique [0002] Intravenous infusion is a common clinical method for treating diseases. During infusion, insoluble particles will be contained in the liquid medicine and the infusion set itself. At present, filters are generally used in clinical practice to filter them to prevent insoluble particles from entering the human body and causing medical accidents. However, the general structure of the filter currently used clinically is: after the two shells are fastened together, the periphery of the shell is welded, the filter membrane is installed in the shell and welded and fixed with the shell, and the upper end of the shell is provided with a liquid inlet and an exhaust port. mouth, the lower end is provided with a liquid outlet. The filter with this structure has the following defects: 1. The filter is not exhausted smoothly, and a gas-l...

AI Technical Summary

Problems solved by technology

The filter with this structure has the following defects: 1. The filter is not exhausted smoothly, and a gas-liquid mixture will be generated. It requires a nurse to pop the air bubbles, which is time-consuming and laborious. The life of the patient; 2. The filter membrane and the shell are welded and fixed, and the shell is easily deformed after welding, which affects the filtration area of ​​the filter membrane; 3. The existing filter has exhaust dead angles, and the gas cannot be discharged, which affects the entry of liquid or Discharge; 4. After the two shells are fastened together, weld the periphery. Due to the stress of welding, the filter shell will be deformed, and leakage is prone to occur during use.

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