| Test Name: |
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Creatinine, Whole Blood
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| Test Code(s): |
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WBCRET / HCWBCRET
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| CPT Code(s): |
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82565
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| Methodology: |
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Ion Selective Electrode and/or Enzymatic
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| Days Performed: |
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Daily, 24 hours.
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| Turnaround Time: |
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Stat: Up to 30 minutes. All requests processed stat.
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Specimen Requirements
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| Specimen: |
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Arterial or venous blood
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| Patient Preparation: |
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None. For venous samples on outpatients, send patient to UWHC Outpatient Phlebotomy to be drawn.
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| Collection Instructions: |
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Radiometer "PICO"® syringes must be free of bubbles and clots.
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| Collection Container: |
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Preferred: Radiometer PICO® syringe
Also Acceptable:
Green top
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| Collection Volume: |
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Preferred: 1.5 mL
Pediatrics: 0.5 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: 0.5 mL
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| Specimen Transport: |
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Transport specimen to UWHC Core Laboratory (B4/220) immediately. Specimen must arrive in the UWHC Core Lab within 30 minutes of collection.
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| Unacceptable Criteria: |
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Clotted specimens, iced specimens, specimens greater than 1 hour old when received by laboratory are not acceptable.
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| Stability: |
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Ambient: 1 hour
Refrigerated: Not acceptable
Frozen: Not acceptable
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Interpretation
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Reference Interval:
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| Creatinine: |
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| Age |
Male
mg/dL
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Female
mg/dL
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| 0 days-1month |
0.30-0.90 |
0.30-0.90 |
| 2 months-2 years |
0.15-0.40 |
0.15-0.40 |
| 3 years-6 years |
0.25-0.50 |
0.25-0.50 |
| 7 years-10 years |
0.30-0.65 |
0.30-0.65 |
| 11 years-14 years |
0.40-0.80 |
0.40-0.80 |
| 15 years and up |
0.70-1.20 |
0.55-1.05 |
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