Whole blood viscosity assessment issues III: Association with international normalized ratio and thrombocytopenia.

North American Journal of Medical Sciences
Ezekiel Uba NwoseEugene Butkowski

Abstract

Anticoagulant and antiplatelet therapies are being used interchangeably or in combination. While international normalized ratio is assessed to determine anticoagulant's contraindication/need, whole blood viscosity is not assessed to determine the need for antiplatelet. The objective of this study is to investigate whether whole blood viscosity value is associated with levels of international normalized ratio and platelet count. De-identified archived clinical pathology data for the year 2008 were audited. All cases of international normalized ratio, which were concomitantly tested for haematocrit and total proteins, were extracted (n=7,387). Whole blood viscosity levels were extrapolated. Whether differences are associated with normal vs. high international normalized ratio and thrombocytopenia vs. thrombocytosis were evaluated. Multivariate analysis show that whole blood viscosity levels statistically significantly differs between international normalized ratio and platelet counts (p<0.001). Platelet count is statistically significantly lower in low blood viscosity when compared with hyperviscosity and normoviscosity (p<0.001). Conversely, international normalized ratio is statistically significantly higher in low blood viscos...Continue Reading

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