title: [Detection of reagent errors by internal quality control of the Coulter counter S].
abstract: By a simple program of quality control for the Coulter counter model S two deficient reagents could be detected. To high values of PCV associated with a decrease of MCHC were caused by a faulty Isoton batch. This error was revealed by native blood samples but not by the stabilized 4 C standard. Falsely elevated leukocyte counts due to insufficiently lysed giant platelets and platelet aggregates were produced by modified Lyse-S batches. Comparisons made with a Coulter counter model F using Zaponin and with a counting chamber yielded values at lower levels.
mesh_terms: D001772:Blood Cell Count / Q000295:instrumentation*; D001792:Blood Platelets; D006400:Hematocrit; D006801:Humans; D007202:Indicators and Reagents / Q000592:standards*; D007958:Leukocyte Count; D010973:Platelet Adhesiveness; D011786:Quality Control
chemical_list: D007202:Indicators and Reagents
vernacular_title: Aufdeckung von Reagenzienfehlern durch interne Qualitätskontrolle für Coulter Counter S