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- Erythrocyte Sedimentation Rate
- Westergren Sedimentation Rate
Evaluate the nonspecific activity of infections, inflammatory states, autoimmune disorders, and plasma cell dyscrasias
Optimum results are from blood less than two hours old. The ESR is of limited diagnostic value in severe anemia or in hematologic states that affect increased size and shape variation (poikilocytosis) of the RBC (ie, presence of sickle cells or spherocytes). Extreme plasma viscosity will result in a decreased ESR.
Modified Westergren; automated and manual methods are employed.
• Male: 0 to 50 years: 0−15 mm/hour, 50 years and older: 0−30 mm/hour
• Female: 0 to 50 years: 0−32 mm/hour, 50 years and older: 0−40 mm/hour
Elevations in fibrinogen, α- and β-globulins (acute phase reactants), and immunoglobulins increase the sedimentation rate of red cells through plasma. The test is important in the diagnosis of temporal arteritis, as well as its management.1
Tube fill capacity
Invert tube immediately 8 to 10 times once tube is filled at time of collection.
Causes for Rejection
Hemolysis; clotted specimen; underfilled tube; specimen older than 24 hours; improper labeling; transfer tubes with whole blood; specimen received in any anticoagulant other than EDTA; specimen diluted or contaminated with IV fluid; patient specimen with presence of cold agglutinins or cryoglobulins; specimen received with plasma removed
|Order Code||Order Code Name||Order Loinc||Result Code||Result Code Name||UofM||Result LOINC|
|005215||Sedimentation Rate-Westergren||4537-7||005215||Sedimentation Rate-Westergren||mm/hr||4537-7|