title: Development and description of the "random duplicates" method of quality control for a hematology laboratory.
abstract: Calibration of laboratory apparatus is not sufficient to ensure accurate results. Application of the "random duplicates" method to the measurement of hemoglobin estimations and leukocyte counts by the Coulter Model S revealed unsuspected deficiencies in the laboratory operation. The resultant changes led to a significant improvement in the quality of work performed.
mesh_terms: D006405:Hematology; D006454:Hemoglobins; D007753:Laboratories / Q000592:standards*; D007958:Leukocyte Count; D011786:Quality Control
chemical_list: D006454:Hemoglobins