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Erythrocyte (Red cell) Sedimentation Rate (ESR or SED)

Erythrocyte (Red cell) Sedimentation Rate (ESR or SED):


ESR (erythrocyte sedimentation rate) is a nonspecific screening test for various diseases. This 1-hour test measures the distance (in millimeters) that red blood cells settle in unclotted blood toward the bottom of a specially marked test tube.