title: Quality control in routine haemoglobinometry.
abstract: An analysis of haemoglobin estimations in a routine laboratory shows that quality control methods based on mean values are unsatisfactory. The use of a cusum method together with control samples is a sensitive and convenient technique for the early discovery of minor deviations in results and it is not dependent on a stable population of patients.
mesh_terms: D006452:Hemoglobinometry / Q000592:standards*; D006801:Humans; D011786:Quality Control; D013223:Statistics as Topic; D013997:Time Factors