Detection of irregular red cell antibodies: More than 3 years of experience with a gel technique and pooled screening cells

Abstract

Background and objectives: The purpose of this study was to evaluate more than 3 years of experience with a gel technique in combination with pooled screening cells for the detection of irregular red cell antibodies. Materials and methods: Conventional serologic methods were used for blood typing, antibody screening and cross-matching until the end of 1992. We introduced the gel technique as a routine assay for antibody detection and identification in 1993. Results: After the tube technique had been abandoned, the number of false-positive antibody screening tests was reduced by 71%, positive antibody screening tests by 33%, enzyme agglutination by 100% and rouleaux reactions and cold-reacting antibodies by more than 50%. There was a 40% increase in first-time detection of clinically relevant antibodies. We saw no increase in delayed haemolytic transfusion reactions. Conclusions: For the detection of irregular red cell antibodies, pooled screening cells in combination with a gel technique are at least as efficient and safe as a conventional tube technique with unpooled test cells.