Unit Code 9152:
Sedimentation Rate, Blood
Method Description
The ESR is performed using the Westergren method. The test
measures the rate of sedimentation of erythrocytes in a 1:5 dilution
of 3.8% sodium citrate solution to whole blood. The blood is drawn
up in a column and allowed to sit undisturbed for 1 hour. The
sedimentation is read as millimeters (mm), recording the distance
from the top of the column to the meniscus of the erythrocyte
sediment. (National Committee for Clinical Laboratory Standards,
Standard Method for the Human Erythrocyte Sedimentation Rate
(ESR) Test. April 1976)
Performing Laboratory Location
Rochester
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