| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
Methylmalonic Acid, Urine with Creatinine
Test Code91032
Alias/See Also
LAB304572
Preferred Specimen
1.7 mL of an unpreserved random urine submitted in a plastic leak-proof container
Minimum Volume
0.6 mL
Other Acceptable Specimens
Unpreserved, catheterized urine, or first void clean catch urine, or random clean catch urine or 24-hour urine
Instructions
Do not use preservatives
Transport Temperature
Refrigerated (cold packs)
Specimen Stability
Room temperature: 4 days
Refrigerated: 12 days
Frozen (-20° C): 30 days
Frozen (-70° C): 90 days
Refrigerated: 12 days
Frozen (-20° C): 30 days
Frozen (-70° C): 90 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Received room temperature • Acidified urine
Methodology
Chromatography/Mass Spectrometry
Setup Schedule
Set up: Tues, Fri; Report available: 4 days
Clinical Significance
Methylmalonic Acid (MMA) is useful to diagnose and monitor Vitamin B12 (cobalamin) deficiency, and to diagnose and monitor patients with methylmalonic acidemia.
