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Maxime Dely: 4 Criteria for Choosing the Right Leukoreduction Filter
Sep 18, 2025, 10:42

Maxime Dely: 4 Criteria for Choosing the Right Leukoreduction Filter

Maxime Dely,ย Sales and Application Specialist in Therapeutic Apheresis and Cell Therapy, has shared a post onย LinkedIn:

“๐——๐—ผ ๐—ฎ๐—น๐—น ๐—น๐—ฒ๐˜‚๐—ธ๐—ผ๐—ฟ๐—ฒ๐—ฑ๐˜‚๐—ฐ๐˜๐—ถ๐—ผ๐—ป ๐—ณ๐—ถ๐—น๐˜๐—ฒ๐—ฟ๐˜€ ๐—ฝ๐—ฒ๐—ฟ๐—ณ๐—ผ๐—ฟ๐—บ ๐˜๐—ต๐—ฒ ๐˜€๐—ฎ๐—บ๐—ฒ? ๐—ก๐—ผ๐˜ ๐—ฟ๐—ฒ๐—ฎ๐—น๐—น๐˜†โ€ฆ

In transfusion medicine, not all filters are equal. Behind what looks like a simple device lie technical choices that directly ๐—ถ๐—บ๐—ฝ๐—ฎ๐—ฐ๐˜ ๐—ฝ๐—ฎ๐˜๐—ถ๐—ฒ๐—ป๐˜ ๐˜€๐—ฎ๐—ณ๐—ฒ๐˜๐˜† ๐—ฎ๐—ป๐—ฑ ๐—ฏ๐—น๐—ผ๐—ผ๐—ฑ ๐—ฝ๐—ฟ๐—ผ๐—ฑ๐˜‚๐—ฐ๐˜ ๐—พ๐˜‚๐—ฎ๐—น๐—ถ๐˜๐˜†. Soโ€ฆ how do you know which one is the right filter?

Here are the 4 key criteria

๐Ÿญ. ๐—Ÿ๐—ฒ๐˜‚๐—ธ๐—ผ๐—ฟ๐—ฒ๐—ฑ๐˜‚๐—ฐ๐˜๐—ถ๐—ผ๐—ป ๐—ฝ๐—ฒ๐—ฟ๐—ณ๐—ผ๐—ฟ๐—บ๐—ฎ๐—ป๐—ฐ๐—ฒ
โ—พ European standard: โ‰ค 1 million residual white blood cells
โ—พ AABB standard: โ‰ค 5 million

In practice, users often expect a filter to perform ๐Ÿฑ ๐˜๐—ผ ๐Ÿญ๐Ÿฌ ๐˜๐—ถ๐—บ๐—ฒ๐˜€ ๐—ฏ๐—ฒ๐˜๐˜๐—ฒ๐—ฟ ๐˜๐—ต๐—ฎ๐—ป ๐˜๐—ต๐—ฒ๐˜€๐—ฒ ๐—น๐—ถ๐—บ๐—ถ๐˜๐˜€, to ensure stability and safety.

๐Ÿฎ. ๐—ฅ๐—ฒ๐˜€๐—ถ๐—ฑ๐˜‚๐—ฎ๐—น ๐—น๐—ผ๐˜€๐˜€๐—ฒ๐˜€
An efficient filter retains leukocytesโ€ฆ but it may also trap red blood cells. Too much loss = a direct impact on ๐—ต๐—ฒ๐—บ๐—ผ๐—ด๐—น๐—ผ๐—ฏ๐—ถ๐—ป ๐—น๐—ฒ๐˜ƒ๐—ฒ๐—น๐˜€, or on the required minimum recovery (โ‰ฅ ๐Ÿด๐Ÿฑ% ๐—ฎ๐—ฐ๐—ฐ๐—ผ๐—ฟ๐—ฑ๐—ถ๐—ป๐—ด ๐˜๐—ผ ๐—”๐—”๐—•๐—•). The challenge is to find the right balance.

๐Ÿฏ. ๐—™๐—ถ๐—น๐˜๐—ฟ๐—ฎ๐˜๐—ถ๐—ผ๐—ป ๐˜€๐—ฝ๐—ฒ๐—ฒ๐—ฑ
Some centers want ultra-fast processing . Others prefer quality over speed. It all depends on the number of units to process daily and the available โ€œ๐—บ๐—ฎ๐˜€๐—ธ๐—ฒ๐—ฑ ๐˜๐—ถ๐—บ๐—ฒ.โ€

๐Ÿฐ. ๐—™๐—ถ๐—ป๐—ฎ๐—น ๐—ฐ๐—ผ๐—บ๐—ฝ๐—ผ๐—ป๐—ฒ๐—ป๐˜ ๐—พ๐˜‚๐—ฎ๐—น๐—ถ๐˜๐˜†
Filters also influence hemolysis in red blood cells or platelet activation in PC. An invisible variableโ€ฆ but one that determines therapeutic value.

Conclusion – there is no such thing as a โ€œ๐—ฝ๐—ฒ๐—ฟ๐—ณ๐—ฒ๐—ฐ๐˜โ€ ๐—ณ๐—ถ๐—น๐˜๐—ฒ๐—ฟ. The right filter is the one that ๐—ณ๐—ถ๐˜๐˜€ ๐˜†๐—ผ๐˜‚๐—ฟ ๐—ฝ๐—ฟ๐—ผ๐—ฐ๐—ฒ๐˜€๐˜€, ๐˜†๐—ผ๐˜‚๐—ฟ ๐—ฝ๐—ฟ๐—ถ๐—ผ๐—ฟ๐—ถ๐˜๐—ถ๐—ฒ๐˜€, ๐—ฎ๐—ป๐—ฑ ๐˜†๐—ผ๐˜‚๐—ฟ ๐—ฝ๐—ฎ๐˜๐—ถ๐—ฒ๐—ป๐˜๐˜€.

๐˜ˆ๐˜ฏ๐˜ฅ ๐˜บ๐˜ฐ๐˜ถ, ๐˜ธ๐˜ฉ๐˜ช๐˜ค๐˜ฉ ๐˜ฐ๐˜ง ๐˜ต๐˜ฉ๐˜ฆ๐˜ด๐˜ฆ ๐˜ค๐˜ณ๐˜ช๐˜ต๐˜ฆ๐˜ณ๐˜ช๐˜ข ๐˜ธ๐˜ฆ๐˜ช๐˜จ๐˜ฉ๐˜ด ๐˜ต๐˜ฉ๐˜ฆ ๐˜ฎ๐˜ฐ๐˜ด๐˜ต ๐˜ช๐˜ฏ ๐˜บ๐˜ฐ๐˜ถ๐˜ณ ๐˜ฅ๐˜ฆ๐˜ค๐˜ช๐˜ด๐˜ช๐˜ฐ๐˜ฏ๐˜ด?”

Maxime Dely: 4 Criteria for Choosing the Right Leukoreduction Filter

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