Transfusion set with anti-blood-reflow filter bag

Abstract

The invention discloses a transfusion set with an anti-blood-reflow filter bag. The transfusion set is mainly characterized in that: a filter bag made of a liquid medicament filter membrane is arranged in a funnel; the upper end of the filter bag is enclosed, and the lower end of the filter bag is communicated with a lower conduit through a two-way tube; the upper end of a drainage strip made of hydrophilic fibers is connected with the filter bag; and the lower end of the drainage strip is arranged at the water outlet of the funnel. During working, a liquid medicament flows into the funnel, residual gas in the funnel is exhausted downwards through the filter bag and the lower conduit, exhausting is stopped automatically when a liquid surface in the funnel surpasses the filter bag, and the liquid medicament flows into the lower conduit through the filter bag under the action of gravity, so that transfusion can be performed. When the liquid medicament runs off completely, the filter bag with a multilayer structure is used for preventing gas from flowing through the filter bag under the action of the surface tension of the liquid, so that an automatic liquid stopping function is realized; and the drainage strip is used for guiding residual liquid at the bottom of the funnel to the filter bag for micro transfusion, so that an anti-blood-reflow function is realized.

Description

technical field [0001] The invention relates to the category of medical instruments, and relates to a filter capsule anti-blood infusion transfusion device. Background technique [0002] The liquid medicine filters of the existing infusion sets are flat filters. In order to improve the filtering effect, the filter area must be enlarged, especially the precision filter. In order to ensure the flow rate and flow rate, the area of ​​the filter membrane is generally greater than 300mm 2 , Such a large area filter must be installed outside the funnel, due to the large plane area, the production process is complicated and the cost is high. [0003] In recent years, there have been patents or products on filter tube infusion sets (application number 200710137596.X) and anti-reflux infusion sets, but these patents and products are not only unreliable in performance, but also complex in structure and high in cost. Moreover, it only has one of the above-mentioned properties, and it d...

AI Technical Summary

Problems solved by technology

[0002] The liquid medicine filters of the existing infusion sets are flat filters. In order to improve the filtering effect, the filter area must be enlarged, especially the precision filter. In order to ensure the flow rate and flow rate, the area of ​​the filter membrane is generally greater than 300mm 2 , such a large area filter must be installed outside the funnel, due to the large plane area, the production process is complicated and the cost is high

[0003] In recent years, there have been patents or products for filter tube infusion sets (application number 200710137596.X) and anti-blood return infusion sets, but these patents and products are not only unreliable in performance, but also complex in structure and high in cost

Moreover, it only has one of the above-mentioned properties, and it does not have the four functions of automatic exhaust, automatic liquid stop, anti-blood return and liquid filtration in a liquid medicine filter.

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