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Laboratory Medicine

Laboratory Test Catalogue

Erythrocyte Sedimentation Rate (ESR)

Test Name

Erythrocyte Sedimentation Rate (ESR)

Lavender Tube Specimen Type / Requirements

Container Type = Lavender

Minimum Venous Volume = 2 mL whole blood

Capillary - BD microcollection tube; minimum volume 250µL for running neat, although 125 µL is acceptable run as a dilution

Specimen Handling

Collection Instructions: Collect sample in a lavender (EDTA) top and send to core lab. Ensure sample is mixed adequately. Sample should be well mixed at time of collection to prevent platelet clumping Write your initials, date and time of collection on the collection label.

Laboratory Staff Instructions: • If the test is requested > 4 hours after collection time, the sample can still be run, but the comment @4HR is to be added. This comment states: “Analysis performed more than 4 hours after collection. Interpret with caution.”

Stability: Stable for 4Hrs at room temperature.

Transportation: Transport at room temperature within 1 hour of collection.

Sample Rejection Criteria: Sample >12Hrs Plasma, clotted sample, Grossly hemolyzed samples, Unlabeled or Not Sufficient Quantity Samples will be rejected.

Required Documentation

Turnaround Time (TAT)

5 Hrs

Test Utilization

24 hours a day, 7 days a week

Reference Value

Males: 0 – 15 mm/hr

Females: 0 – 20 mm/hr

Test Code

ESR with CBC, (ESR1 without CBC)

Methodology

Coulter/Impedance principle

Testing Location

SMH-Haematology

Other Information

Last Updated: June 06, 2019