UW Hospital and Clinics Lab Test Directory
| Test Name: |
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ESR
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| Test Code(s): |
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WEST / ESR
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| CPT Code(s): |
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85652
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| Methodology: |
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Modified Westergren Method
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| Clinical Significance: |
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Recommended for rheumatology patients.
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| Days Performed: |
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Daily, 24 hours.
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| Turnaround Time: |
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Stat: 1 hour.
Routine: 2 hours.
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Specimen Requirements
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| Specimen: |
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Blood
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| Collection Instructions: |
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A lavender top tube must be drawn just for Erythrocyte Sedimentation Rate (ESR) testing. If additional work on a lavender top tube is needed, a separate tube must be drawn.
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| Collection Container: |
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Preferred: Lavender top
Also Acceptable:
Excyte ESR Vacuum container
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| Collection Volume: |
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Preferred: 4 mL
Pediatrics: 2 mL
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| Sample Analyzed: |
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Whole Blood
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| Volume Required: |
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Preferred: 1.5 mL
Pediatrics: 1.3 mL
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| Specimen Transport: |
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Transport specimen to UWHC Core Laboratory (B4/220) within 4 hours of collection if at room temperature or with coolant pack if within 12 hours; avoid freezing.
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| Stability: |
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Ambient: 4 hours
Refrigerated: 12 hours
Frozen: Not acceptable
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Interpretation
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Reference Interval:
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| Age |
mm/hr |
| Male: 0 days and up |
0 - 15 |
| Female: 0 days and up |
0 - 20 |
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ESR Sedimentation Rate, Westergren
Erythrocyte Sedimentation Rate
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