Evaluation of Double 51CR Technique

Summary. The post‐transfusion survival of multiple units of concentrated red cells was measured by 51chromium automated differential agglutination and double 51chromium technics. Since the mean 24 h survivals were similar with both assay methods, these methods are considered acceptable in evaluating red cell preservation. Analysis of the paired data, however, revealed a significant difference in the results, indicating that an average of 3% of 51chromium eluted from red cells during the first 24 h.