title: Quality assurance for multichannel hematology instruments. Four years' experience with patient mean erythrocyte indices.
abstract: Experience using the Bull patient moving average control system over a four-year period to control a Coulter multichannel hematology counting system is described. The system allowed the abandonment of commercial control materials at an annual saving of almost $3,000 without any deterioration in the quality of laboratory data generated. Guidelines or instrument trouble shooting are outlined. A catalog of all major control problem episodes that occurred during the four-year period is included.
mesh_terms: D004909:Erythrocyte Indices; D006403:Hematologic Tests / Q000295:instrumentation / Q000592:standards; D006801:Humans; D011786:Quality Control