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Test Code LAB322 Sedimentation Rate, Westergren (ESR)

Department

HEMATOLOGY

Primary Collection Container

Lavender 4 mL (K3EDTA)

Alternate Collection Container

Lavender 6 mL (K3EDTA)

Transport

Whole blood refrigerated

Preferred Transport Temperature

Refrigerated

Processing

Specimen must be received in the laboratory and test performed within 24 hours of collection.

Avoid exposure to extreme hot or cold temperatures. Optimal testing of ESR is within 6 hours of collection.

Testing will be performed on specimens up to 23 hours old if refrigerated. The behavior of specimens tested for ESR over time is variable in an unpredictable fashion.

Stability

Ambient: 4 hours

Refrigerated: 24 hours

Minimum Testing Volume

1.0 mL

Reference Range

Female:

0-50 yr: 0-20 mm/hr

50-150 yr: 0-30 mm/hr

Male:

0-50 yr: 0-15 mm/hr

50-150 yr: 0-20 mm/hr

Methodology

Westergren Sedimat 15

Performed

Sunday – Saturday

Reported

As completed

CPT Codes

85651

Unacceptable Conditions

Frozen, clotted, serum or grossly hemolyzed samples.

Additional Information

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