ARUP's Laboratory Test Directory

Sedimentation Rate, Westergren (ESR) : 0040325

Mnemonic: WEST

Methodology: Visual Identification
Performed: Sun-Sat
Reported: Within 24 hours
Specimen Required: Collect: Black (sodium citrate).

Specimen Preparation: Transport 7 mL whole blood.

Storage/Transport Temperature: Room temperature. Deliver to lab immediately. Specimen should be run within four hours of collection.

Unacceptable Conditions: Frozen specimens. Hemolyzed or clotted specimens.

Stability (collection to initiation of testing): Ambient: 4 hours; Refrigerated: 24 hours; Frozen: Unacceptable
Reference Interval:
Male: 0-10 mm/hr
Female: 0-20 mm/hr
CPT Code(s): 85651