Precision Transfusion Management: Rh Phenotype Compatibility and Antibody Surveillance in Southern China
Huang, X.-q.; Li, L.-x.; Yang, Z.-Y.; Long, X.-X.; Lai, C.-Y.
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Objective: To investigate the distribution frequencies of Rh blood group antigens (C, c, D, E, e) and phenotypes in the population of Hengyang, Hunan Province, and to analyze the production of Rh alloantibodies in repeatedly transfused patients, thereby providing a basis for developing precise transfusion strategies. Methods: Rh phenotyping, antibody screening, and antibody identification were performed on 3,635 hospitalized patients and 5,326 blood donors using Rh blood group typing cards. A blood transfusion management system was used to identify and track patients' historical specific antibodies, with automatic alerts for inconsistent results. Results: The antigen frequency distribution in patients was D (99.56%) > e (94.69%) > C (91.64%) > c (48.06%) > E (38.79%). The phenotypic distribution frequencies among Rh(D)-positive patients were as follows: CCDee (51.31%) > CcDEe (30.01%) > CcDee (9.37%) > ccDEE (5.00%) > ccDEe (2.79%) > CCDEe (0.80%) > ccDee (0.39%) > CcDEE (0.28%) > CCDEE (0.05%). From March to October 2023, after implementing Rh phenotyping and antigen-matched compatible transfusions for five antigens, the antibody screening positivity rate decreased to 0.97%, compared to 1.14% during the same period in 2022 (p < 0.05). Antibody identification in 276 antibody-positive samples revealed that alloantibodies against the Rh system accounted for the highest proportion (46.01%, 127/276), which was lower than the 55.21% observed in 2022 (p < 0.05). Unexpected antibodies in the Rh system were the primary cause of crossmatch incompatibility in clinical transfusions, accounting for 46.01%. Conclusion: Rh phenotyping and sustained antigen-matched compatible transfusions in repeatedly transfused patients can effectively prevent and reduce alloantibody production. Continuous tracking of specific antibodies and transfusion efficacy evaluation can be achieved through an efficient blood transfusion management system.
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