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Myoglobin, Urine
Test Code661
Preferred Specimen
Minimum: 4 mL urine submitted in a Myoglobin Transport tube
Instructions
Add exactly 4 mL random urine to a Myoglobin Transport tube, within 1 hour of collection. Freeze and ship frozen. (Transport tube# 177447 available through Client Supply).
Exactly 4 mL of urine in the Myoglobin Transport tube is required to achieve the required pH of >8.0; more than 4 mL of urine will lower the pH outside acceptable range.
Note: Myoglobin in urine is very unstable unless the pH is between 8.0 and 9.0
Exactly 4 mL of urine in the Myoglobin Transport tube is required to achieve the required pH of >8.0; more than 4 mL of urine will lower the pH outside acceptable range.
Note: Myoglobin in urine is very unstable unless the pH is between 8.0 and 9.0
Transport Temperature
Frozen
Specimen Stability
Room temperature: Unacceptable
Refrigerated: 72 hours
Frozen: 72 hours
Refrigerated: 72 hours
Frozen: 72 hours
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Specimen received in a non-Myoglobin Transport tube • More than 4 mL urine in Myoglobin Transport tube • Specimen received room temperature • Specimen received past stability • pH <8.0 • Timed urine
Methodology
Nephelometry
Setup Schedule
Set up: Mon-Sat evening; Report available: 1-2 days
Reference Range
<28 mcg/L
Clinical Significance
The breakdown of skeletal muscle (rhabdomyolysis) releases myoglobin. Very high concentrations of myoglobin may increase the risk of acute renal failure.
Performing Laboratory
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly, VA 20153
