Rapid Procedure for Erythrocyte Packed Cell Volume and Sedimentation Rate Determinations

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Abstract
The conventional erythrocyte sedimentation rate and the packed red cell volume (hematocrit) procedures were modified to effect more than a 50% reduction in the operational time required. The essence of the modification consists in determining the sedimentation rates and hematocrit values directly in the original blood collection tube without the necessity of the usual transfer to a secondary, calibrated hematocrit tube. This is accomplished by employing a proportional volume chart which gives the sedimentation rate on hematocrit value for the red cells irrespective of the sample volume fluctuations. All values are expressed as percentages rather than the absolute measurements commonly employed.

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