This study assesses the diagnostic accuracy of the PK/HK ratio and PK activity in hereditary anemias, highlighting key limitations in transfusion impacts.
Key Points
PK activity demonstrated 95% specificity compared to 73% for the PK/HK ratio in differentiating pyruvate kinase deficiency.
Reticulocytosis, while markedly reducing PK activity, does not confound diagnostic accuracy for PK deficiency.
Transfusions significantly skew PK activity results, complicating the diagnostic process.
Measurement of reticulocyte-specific PK activity showed reliable results during regular transfusions.