期刊
VETERINARY CLINICAL PATHOLOGY
卷 43, 期 1, 页码 43-49出版社
WILEY-BLACKWELL
DOI: 10.1111/vcp.12116
关键词
Congenital macrothrombocytopenia; platelet mass; primary hemostasis
BackgroundModels for the regulation of thrombopoiesis predict that platelet mass is the biologically regulated variable, yet clinical evaluations of thrombopoiesis are often based on platelet number. When thrombocytopenia and variation in platelet size occur concurrently, platelet count may poorly estimate total platelet mass, confounding clinical decision making. ObjectiveWe hypothesized that plateletcrit (PCT) provides clinically important information when platelet number is an incomplete representation of platelet mass, such as in genetic macrothrombocytopenia. MethodsWe retrospectively compared platelet count and PCTs with general reference intervals for 4 groups of dogs: sick Cavalier King Charles Spaniels (CKCS) and Greyhounds, presented for nonhematopoietic disease to the University of Minnesota (measured using an Advia 2120) and Auburn University Teaching Hospitals (measured using an Advia 120) over a 3-year period. ResultsA canine PCT reference interval of 0.129-0.403% was established. None of the 4 sample groups had significantly more individuals below the reference interval for plateletcrit. For platelet count, only the 2 CKCS groups had significantly more individuals below the reference interval than predicted. ConclusionUse of the PCT as determined by the Advia 120/2120 appeared to avoid overestimation of low platelet mass in sick CKCS in a clinical setting. In contrast, the PCT performed similarly to the platelet count in evaluation of platelet mass in sick Greyhounds. Evaluation of the PCT should be considered in other conditions associated with increased mean platelet volume.
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