Albumin-Creatinine Ratio, Urine
Also known as: ALB/CRT
Use
The Albumin-Creatinine Ratio urine test is used to detect early kidney disease, particularly in patients with diabetes or other risk factors such as hypertension. It is a key diagnostic tool for evaluating and managing acute kidney injury and chronic kidney disease through the measurement of albumin and creatinine in urine, allowing for the assessment of kidney function and the identification of nephropathy at an early stage.
Special Instructions
Collect 24-hour urine specimens for best results, but random or other timed urine collections are also acceptable. It is critical to refrigerate the specimen during collection to ensure stability. Transfer an aliquot of the well-mixed urine collection to an ARUP Standard Transport Tube. Record total volume and collection interval for accurate calculations of analyte ratios.
Limitations
Excessive deviations from the 24-hour collection period or inaccurate recording of urine volume may impact the interpretability of results. The test may not fully account for factors affecting creatinine levels such as muscle mass, diet, or exercise. Repeated freeze-thaw cycles of the sample must be avoided to ensure accurate results.
New York Approved
Methodology
Immunoassay (Quantitative Immunoturbidimetry)
Biomarkers
LOINC Codes
- 35674-1
- 2162-6
- 30003-8
- 14958-3
- 19153-6
- 30211-7
- 58448-2
- 14956-7
Result Turnaround Time
1 day
Related Documents
For more information, please review the documents below
Specimen
Urine
Volume
1 mL
Minimum Volume
0.5 mL
Container
ARUP Standard Transport Tube
Collection Instructions
Transfer 1 mL aliquot of urine from a well-mixed collection. Record total volume and collection time interval on transport tube and test request form.
Patient Preparation
Collect 24-hour urine. Refrigerate during collection.
Storage Instructions
Refrigerated.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 1 week |
| Refrigerated | 1 month |
| Frozen | 6 months |