21050:ERYTHROCYTE SEDIMENTATION RATE, WESTERGREN

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21050:ERYTHROCYTE SEDIMENTATION RATE, WESTERGREN
Alias Names: ESR / SED Rate
Methodology: Automated Photo-Optical measurement of red cell sedimentation rate
Edit Date: 10/1/2010
Performed: Daily
Released: Same day as tested
CPT Code: 85652
Specimen Collection Details
Collection: One 4 mL lavender top tube (EDTA). Fill tube at least 1/3 full.
Handling: Refrigerate. Send to the laboratory same day.
Stability: Specimen may be tested up to 24 hours after collection if refrigerated. A small percentage (<5%) of abnormal specimens tested 16 hours or more after collection will correct to within the normal range, according to PeaceHealth Laboratories' stability studies.
Ambient specimen stable 4 hours.
Standard Volume: 4 mL EDTA whole blood.
Minimum Volume: 1 mL EDTA whole blood.
Transport: Refrigerated.
Rejection Criteria: Specimen age; clotted or frozen specimen; marked hemolysis.

Age Gender Reference Range
0-49 years Male 0-15
Female 0-20
≥ 50 years Male 0-20
Female 0-25