Table 3 : Erythrocyte damage in red blood cell solutions after use
of transfusion and potassium (B method) filters.

	Before filter	After filter
Transfusion filter
Free hemoglobin (mg/dL)	12.0±0.0	16.5±0.6*
LD (IU/L)	58.0±0.9	65.0±0.4*
Potassium adsorption filter (B method)
Free hemoglobin (mg/dL)	10.5±0.3	13.8±0.5*
LD (IU/L)	54.0±1.4	61.3±0.8*

The results are representive of 3 independent experiments.
Data represent the means±standard errors.
*:p<0.05 vs. values from the sample prior to passing through
transfusion filter or PAF.