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HelpTest ID A124 Alpha-1-Microglobulin, 24 Hour, Urine
Necessary Information
24-Hour volume (in milliliters) is required.
Specimen Required
Container/Tube: Plastic, 5-mL tube
Specimen Volume: 4 mL
Collection Instructions:
1. Collect urine for 24 hours.
2. No preservative.
3. Mix well before taking 4-mL aliquot.
Additional Information: For multiple collections see Urine Preservatives-Collection and Transportation for 24-Hour Urine Specimens
Useful For
Assessment of renal tubular injury or dysfunction using 24-hour urine collections
Screening for tubular abnormalities
Detecting chronic asymptomatic renal tubular dysfunction(2)
Profile Information
| Test ID | Reporting Name | Available Separately | Always Performed |
|---|---|---|---|
| AIM | Alpha-1-Microglobulin, 24 HR, U | No | Yes |
| A1MCR | A1M/Creat Ratio | No | Yes |
| A1MC | Alpha-1-Microglobulin Concentration | No | Yes |
| CRT24 | Creatinine, 24 HR, U | Yes, (Order CTU) | Yes |
Special Instructions
Method Name
AIM, A1MCR: Calculation
A1MC: Immunonephelometry
CRT24: Enzymatic Colorimetric Assay
Reporting Name
Alpha-1-Microglobulin, 24 HR, USpecimen Type
UrineSpecimen Minimum Volume
1 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Urine | Refrigerated (preferred) | 7 days | |
| Ambient | 7 days | ||
| Frozen | 7 days |
Reference Values
≥18 years: <23 mg/24 hours
Reference values have not been established for patients who are less than 18 years of age.
Day(s) Performed
Varies
Report Available
1 to 7 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
Test Classification
This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.CPT Code Information
83883
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| A124 | Alpha-1-Microglobulin, 24 HR, U | 99075-4 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| CR_A | Creatinine, 24 HR, U | 2162-6 |
| AIM | Alpha-1-Microglobulin, 24 HR, U | 48414-7 |
| A1MC | Alpha-1-Microglobulin Concentration | 99076-2 |
| A1MCR | A1M/Creat Ratio | 99075-4 |
| TM27 | Collection Duration (h) | 13362-9 |
| VL69 | Urine Volume (mL) | 3167-4 |
| CR_24 | Creatinine Concentration, 24 HR, U | 20624-3 |
Forms
If not ordering electronically, complete, print, and send a Renal Diagnostics Test Request (T830) with the specimen.