Comparative Study of Predeposit and Bedside Leucodepletion Filters.

Area of Science:

• Blood banking and transfusion medicine
• Cellular therapy and component processing

Background:

• Leukocyte removal from cellular blood components reduces transfusion-associated adverse reactions.
• Optimizing leukocyte reduction is crucial for transfusion safety.

Purpose of the Study:

• To compare the efficacy of prestorage versus bedside leucodepletion of packed red blood cells (RBCs).
• To evaluate different filter types (polyurethane vs. polyester) and temperatures for leucodepletion.
• To determine the optimal strategy for achieving log 3 leucoreduction.

Main Methods:

• 400 units of packed RBCs underwent leucodepletion using prestorage and bedside filters (Terumo Penpol Immugard III, Pall Medical BPF-4) at room temperature and 4°C.
• Pre- and post-filtration parameters, including red cell recovery and residual leukocyte count, were analyzed.

Main Results:

• All tested filters achieved over log 3 leucoreduction.
• Prestorage leucodepletion with polyurethane filters yielded higher leucocyte reduction than polyester filters.
• Bedside filters at room temperature showed significantly lower red cell recovery compared to prestorage filters.

Conclusions:

• Prestorage leucodepletion is superior to bedside leucodepletion for packed RBCs.
• Polyurethane filters are more effective than polyester filters for leucodepletion.
• Selective log 3 leucodepletion using polyurethane prestorage filters is recommended for specific patient indications.