Test Overview
Test Methodology

iSED analyzer

Test Usage

Is often used to monitor the effectiveness of therapy in inflammatory diseases.

Reference Range *

Male: 0-15 mm/hour; Female: 0-20 mm/hour

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Limitations

Increased levels of fibrinogen and gamma globulins, mechanical vibrations, low or high room temperature, abnormally shaped red blood cells such as sickle cells and spherocytes, clotted samples, excess anticoagulant and bubbles in the tube may cause results to be inaccurate.

Test Details
Days Set Up
Daily, 24 hours
Analytic Time

2 - 4 hours

Soft Order Code
ESRA
MiChart Code
Westergren Sedimentation Rate
Synonyms
  • Westegren
  • Erythrocyte Sedimentation Rate, Westergren
  • ESR, Westergren
  • Sed Rate, Westergren
  • Westergren Sedimentation Rate
  • WESTEGREN RBC SEDI RATE
  • WEST
  • ESRA
Laboratory
Hematopathology
Section
Hematology
STAT Availability

STAT requests for this test will be performed on a STAT basis (supervisory staff approval is not required).

Specimen Requirements
Collection

Liquid EDTA K3 collection tubes are not acceptable and will be rejected due to possible dilutional effects.

Collection Instructions

Collect specimen in a lavender top EDTA K2 Vacutainer® tube. Send intact whole blood specimen at room temperature within 8 hours of collection, or within 24 hours if refrigerated.

Alternate Specimen
Any EDTA K2 Vacutainer® tube is acceptable, including, but not limited to Pink top EDTA K2 and Tan top EDTA K2 tubes
Rejection Criteria
Specimens which are clotted, diluted with IV fluid, under filled, or received in improper tubes will be rejected. Microtainer® tubes are not acceptable.
Red Top Tube
Normal Volume
3 mL EDTA K2 whole blood
Minimum Volume
1 mL EDTA K2 whole blood
Additional Information

A CBC specimen drawn in an EDTA K2 Vacutainer® tube is acceptable for testing if collection criteria are met. Microtainer® specimens are not acceptable.

Billing
CPT Code
85652
Fee Code
BA012
LOINC
4537-7
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