Additionally, a very select few number of clinical reference labs claim to provide whole blood viscosity testing, however these tests are for systolic blood viscosity-high shear rate viscosity only. There are many reference laboratories and pathology departments of hospitals that can provide clinical viscosity testing, however these tests are for serum and plasma viscosity, not whole blood. Lab.Meridian Valley Laboratory is the only clinical reference lab that provides a comprehensive blood viscosity profile, which includes both systolic and diastolic blood viscosity measurements. Key words: Aspirin, blood stasis, cardiovascular phenomena, clinical practice, laboratory medicine, therapeutic monitoring Being accessible at no extra cost translates to widespread affordance for this laboratory test. One major significant finding from this study is that in patients with haematocrit and serum protein results, the risk of bleeding and monitor the effects of therapy can be assessed using specific and accessible eWBV at no extra cost in laboratory service. In conclusion, eWBV is generally less sensitive but more specific for CVD. Calculated validities show that eWBV is ≥64% specific and ≤38% sensitive to cardiovascular phenomena. Reliability was affirmed by consistent significant differences in WBV levels between thrombocytopenia and thrombocytosis (p < 0.005). Statistical analysis adopted the conventional paired-contingency table method for sensitivities and specificities to assess validity of eWBV in CVD. This was a observational study that used archived data from haematology and biochemistry routine laboratory tests associated with cardiovascular phenomena. The objective of this study was to highlight the discourse on sensitivity, specificity and affordances (accessibility and affordability) of eWBV to re-evaluate the utilization of WBV in clinical practice, especially in low-mid income communities. With the development of extrapolated whole blood viscosity (eWBV) method from haematocrit and total serum protein level, what is yet to be established is the sensitivity and specificity of eWBV to address the limitations in clinical practice. However, the use of WBV in clinical practice is still limited by affordances, knowledge and attitude. Over the years, whole blood viscosity (WBV), an indicator of thickness and stickiness of blood has been a laboratory marker for blood stasis, and useful for monitoring several disorders including cardiovascular diseases (CVD).
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