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Test Code MYOG-UR* Myoglobin, Random, Urine

Specimen Required

Supplies: Urine Myoglobin Transport Tube (T691)

Container/Tube: Plastic, 10-mL urine myoglobin transport tube

Specimen Volume: 5 mL

Collection Instructions:

1. Collect a preservative-free, random urine specimen.

2. If specimen is at ambient temperature, aliquot the urine to a urine myoglobin transport tube (T691) within 1 hour of collection. Refrigerate specimen.

3. If specimen is refrigerate, aliquot the urine to a urine myoglobin transport tube (T691) within 2 hours of collection.

Additional Information: Urinary myoglobin is highly unstable unless alkalinized with sodium carbonate preservative. Even with alkalinization, myoglobin deterioration is variable and specimen dependent (approximate averages of 10% at 1 day, 20% at 3 days, and 30% at 7 days).

Useful For

Confirming the presence of a myopathy associated with any 1 of the following disorders

-Hereditary myoglobinuria

-Phosphorylase deficiency

-Sporadic myoglobinuria

-Exertional myoglobinuria in untrained individuals

-Crush syndrome

-Myocardial infarction

-Myoglobinuria of progressive muscle disease

-Heat injury


May suggest a myopathic cause for acute renal failure

Method Name

Latex Particle-Enhanced Immunoturbidometric Assay

Reporting Name

Myoglobin, Random, U

Specimen Type


Specimen Minimum Volume

1 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Urine Refrigerated 7 days MYOGLOBIN TRANSPORT TUBE

Reference Values

≤65 mcg/L for 18-83 years of age

Reference values have not been established for patients<18 or >83 years of age.

Day(s) Performed

Monday through Sunday

Report Available

1 to 2 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test has been modified from the manufacturer's instructions. Its performance characteristics were determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the US Food and Drug Administration.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
MYGLU Myoglobin, Random, U 2641-9


Result ID Test Result Name Result LOINC Value
MYGLU Myoglobin, Random, U 2641-9