Leucocyte filter

Abstract

The invention concerns a leucocyte filter, which belongs to medical transfusion apparatus for removing leucocyte in blood. It consists of upper duct 1, elastic soft body 2, upper fastening body 3, down duct 6, down fastening body 7, microporous membrane 10 and characterizes in that a body case is assembled by elastic soft body 2, upper fastening body 3, down fastening body 7 and only upper duct 1 and down duct 6 inside the body case communicates to the outside, the rest of which is closed.

Description

technical field [0001] The present invention relates to a device for transfusion and collection of blood, and more precisely relates to a filter for removing leukocyte components in blood after blood collection from a human body. Background technique [0002] Because there are certain differences in blood between people, adverse reactions often occur during blood transfusions, and these adverse reactions basically come from the white blood cells in the blood. Therefore, the white blood cells in the blood should be removed to reduce the adverse reactions of clinical blood transfusion. Larger, the leukocyte filter with a higher integrity rate of the microporous membrane can filter out leukocytes. In the existing leukocyte filter, all sides of the shell are made of hard materials. Before its sterilization, the hard shell has pressed the outer periphery of the microporous filter membrane of the leukocyte filter so that the blood can pass through t...

AI Technical Summary

Problems solved by technology

Since the collected blood needs to be stored within 35 days, and the survival of white blood cells is only 2 to 12 hours, the white blood cells must be filtered out within 2 to 12 hours. Therefore, the white blood cell filter should be connected with the blood bag in a closed state, to prevent bacterial contamination, and because there is blood anticoagulant in the blood bag, it needs to be sterilized at a temperature of 90°C to 140°C for 20 to 80 minutes. Due to the difference in materials, the coefficient of thermal expansion and contraction of the hard shell and The thermal expansion and contraction coefficients of the microporous filter membrane are different, so because the outer periphery of the filter membrane is compressed, the microporous filter membrane will be damaged, and the cells are very small, so that the blood containing white blood cells flows through the damaged part, and the white blood cells The filtration rate of the filter is greatly reduced, so the blood transfused into the human body will also have adverse reactions

In addition, when the leukocyte filter with a hard shell is centrifuged at high speed in the centrifuge of the blood bank's component department, due to the poor adhesion effect, it is easy to cause small ruptures and be contaminated by bacteria

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