TY - JOUR
AU - Pruss, Axel
AB - BACKGROUND: QWALYS 2 is a fully automated system for ABO/D grouping, Rh phenotyping, K typing, and antibody screening (ABS). Its new erythrocyte‐magnetized technology (EMT) is based on the use of magnetic nanoparticles and avoids centrifugation and washing steps. STUDY DESIGN AND METHODS: Overall 499 blood samples were tested with our routine blood bank methods for ABO/D grouping, 313 samples for Rh phenotyping and K typing (microtiter plates; Olympus PK 7200), and 478 samples for ABS (gel centrifugation technique, DiaMed). All samples were tested in parallel with the EMT. RESULTS: In 496 of 499 samples (99.4%), a complete concordance between the observed (QWALYS 2) and the expected results for ABO/D grouping was found. One sample with a weak A in an AB blood group and 2 samples with a weak D were not detected by the QWALYS system. Rh phenotyping and K tests revealed a 100% concordance. In the two ABS techniques, 427 samples were negative in both and 15 samples showed the same antibody specificity in both. Three immunoglobulin M antibodies were as expected negative in EMT and positive by DiaMed. In 32 cases (6.7%), false‐positive reactions were observed by EMT due to 22 unspecific reactions (4.6%) and 10 lipemic or fibrinic plasmas (2.1%). One autoantibody was found by EMT only. CONCLUSION: The EMT is reliably suited to ABO/D grouping, Rh phenotyping, and K testing and is suitable to detect immunoglobulin G red blood cell alloantibodies as well. The rate of false‐positive reactions in ABS due to lipemic and fibrinic samples needs to be reduced.
TI - Evaluation of immunohematologic routine methods using the new erythrocyte‐magnetized technology on the QWALYS 2 system
JF - Transfusion
DO - 10.1111/j.1537-2995.2009.02136.x
DA - 2009-07-01
UR - https://www.deepdyve.com/lp/wiley/evaluation-of-immunohematologic-routine-methods-using-the-new-tDfM7qttA1
SP - 1347
VL - 49
IS - 7
DP - DeepDyve
ER -