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Myoglobin, Urine
Test CodeLAB412
Quest Code
661
Alias/See Also
661
CPT Codes
83874
Preferred Specimen
4 mL random urine submitted in a myoglobin transport tube
Minimum Volume
4 mL
Instructions
Add exactly 4 mL random urine to a Myoglobin transport tube within one hour of collection.
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.
Collect and ship specimens Monday-Thursday only.
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.
Collect and ship specimens Monday-Thursday only.
Transport Container
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?)
Received in a non-Myoglobin transport tube • Specimen received past stability • pH <8.0 • Timed urine • More than 4 mL urine in Myoglobin transport tube • Received room temperature
Methodology
Nephelometry
Setup Schedule
Night
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 Valencia Nichols Institute
27027 Tourney Road
Valencia, CA 91355-5386
Additional Information
Myoglobin, Urine