Soft shell leukocyte reduction filter

Abstract

The present invention discloses a soft shell leukocyte reduction filter, which includes a filter membrane, where the filter membrane includes several coarse filtration layers and fine filtration layers, and the filter membrane is fixed on all sides by an inner ring; and several heat sealing zones disposed on the filter membrane within the inner ring, where a total area of the heat sealing zones accounts for 2.7-5.0% relative to an effective filtration area of the filter membrane. The filter of the present invention, by adding the heat sealing zones on the filter membrane, can not only effectively remove leukocytes from the collected blood (original blood) to meet the European Union standards, but also ensure filtration stability.