Studies with the copper sulfate specific gravity method of blood analysis: III. comparison of hematocrit values with Wintrobes method and a micro method of determination

1. The results of hematocrit values of 44 healthy Filipino adults determined by the copper sulfate specific gravity method, Wintrobes method, and the micro method of Natelson et al. were presented2. The hematocrit values obtained by the copper sulfate specific gravity method showed no statistically significant difference from those obtained by Wintrobes method. The nomogram by Van Slyke et al. has been proved valid for the healthy Filipino adults in this study3. The hematocrit values obtained by the micro method of Natelson et al. were significantly higher than those obtained by Wintrobes and the copper sulfate specific gravity method. (Conclusions)