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Quality control in routine haemoglobinometry
  1. I. Cavill
  1. Department of Haematology, Welsh National School of Medicine, Cardiff


    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.

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