Comparison of four methods of hematocrit measurement

Objective To compare four methods of hematocrit(Hct) measurement. Methods Ninty-seven surgical patients were divided into anemia group(n=47) and normal group(n=50) . Blood samples were taken before operation for the measurements of hematocrit with STS-6100, i-STAT PCA, Sysmex XE2100 and Wintrobe method at the same time, respectively. Results There was no significant difference in the value of Hct between the results reported by STS-6100 and by Sysmex XE2100.The Hct value was significantly lower reported by i-STAT PCA than that reported by Sysmex XE2100 (P0.01),which was significantly higher reported by Wintrobe method than that reported by Sysmex XE2100 in both groups(P0.01).In normal group,the correlation coefficients for STS-6100,Wintrobe method and i-STAT PCA were 0.9631,0.9473,and 0.9270,respectively, and those in anemia group were 0.9640,0.9395,and 0.9169, respectively. Conclusion In the states of both normal and anemia,the Hct measurement with STS-6100 is accurate and stable.