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HelpTest Code A_CR Albumin/Creatinine Ratio
Reporting Name
Albumin/Creatinine RatioPerforming Laboratory
Mayo Clinic Laboratories in Rochester
Useful For
Calculating the albumin concentration per creatinine
Assessing the potential for early onset of nephropathy in diabetic patients using random urine specimens
Method Name
Only orderable as part of a profile. For more information see:
ALBR / Albumin, Random, Urine
RALB / Albumin, Random, Urine.
Calculation
Specimen Required
Only orderable as part of a profile. For more information see:
ALBR / Albumin, Random, Urine
RALB / Albumin, Random, Urine.
Specimen Type
UrineSpecimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Urine | Refrigerated (preferred) | 7 days | |
| Ambient | 7 days | ||
| Frozen | 7 days |
Reject Due To
| All specimens will be evaluated at Mayo Clinic Laboratories for test suitability. |
Reference Values
Only orderable as part of a profile. For more information see:
ALBR / Albumin, Random, Urine
RALB / Albumin, Random, Urine.
Males: <17 mg/g creatinine
Females: <25 mg/g creatinine
Interpretation
In random urine specimens, normal urinary albumin excretion is below 17 mg/g creatinine for males and below 25 mg/g creatinine for females.(3)
Microalbuminuria is defined as an albumin:creatinine ratio of 17 to 299 for males and 25 to 299 for females.
A ratio of albumin:creatinine of 300 or higher is indicative of overt proteinuria.
Due to biologic variability, positive results should be confirmed by a second, first-morning random or 24-hour timed urine specimen. If there is discrepancy, a third specimen is recommended. When 2 out of 3 results are in the microalbuminuria range, this is evidence for incipient nephropathy and warrants increased efforts at glucose control, blood pressure control, and institution of therapy with an angiotensin-converting-enzyme (ACE) inhibitor (if the patient can tolerate it).
Day(s) Performed
Report Available
1 dayTest Classification
Not ApplicableLOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| A_CR | Albumin/Creatinine Ratio | 9318-7 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| A_CR | Albumin/Creatinine Ratio | 9318-7 |