In order to study the behaviour of traditional and new platelet parameters determined by the ADVIA 120 Hematology System, five hundred samples from reference subjects, divided for sex and age, were processed. Significant variations on the basis of sex and age were found. Reference ranges as 95% confidence limits were therefore calculated for each age class, and platelet parameters proved to have specific variations during lifetime. Moreover, one hundred samples from thrombocytopenic patients were processed by the ADVIA 120 System. When compared with those of reference subjects matched for sex and age, all platelet parameters, except mean platelet component (MPC), showed significant differences.
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