A Method for the Measurement of Red Cell Dimensions and Calculation of Mean Corpuscular Volume and Surface Area

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Abstract
1. A photomicrographic method was devised for the measurement of the dimensions of red cells in rouleaux in plasma. With normal blood valid conclusions were drawn from 80 cell measurements with a high degree of confidence. 2. The mean corpuscular volume and the surface area were computed from these dimensions by formulae which treated the cell as a spheroid. 3. The dimensions, mean corpuscular volume and surface area of normal human red cells were as follows: 8.28 µ diameter, 1.71 µ thickness, 82 µ3 volume and 134 µ2 surface area. 4. The computed mean corpuscular volume was in agreement with the refractometric determination.
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