Specific Gravity, Random, Urine
Use
Specific Gravity (SG) is an estimate of the concentration of substances dissolved in urine and can be used as a partial assessment of the kidney's ability to concentrate or dilute urine. However, substances like protein, glucose, and contrast agents disproportionately influence SG; in such cases, urine osmolality is a better measure of urine concentration. Normal interval: 1.002–1.030. Low SG may indicate diseases such as diabetes insipidus, glomerulonephritis, or pyelonephritis. High SG may occur with adrenal insufficiency, hepatic disease, congestive heart failure, or dehydration. ([mayocliniclabs.com](https://www.mayocliniclabs.com/test-catalog/overview/606565?utm_source=openai))
Special Instructions
Not provided.
Limitations
Substances such as protein, glucose, or contrast dye can disproportionately affect specific gravity measurement and may lead to misleading results; in such situations, urine osmolality is the preferred method. No significant cautionary statements noted otherwise. ([mayocliniclabs.com](https://www.mayocliniclabs.com/test-catalog/overview/606565?utm_source=openai))
FDA ApprovedNew York Approved
Methodology
Automated Analyzer (Clinical Chemistry)
Biomarkers
Specific Gravity
Analyte
LOINC Codes
- 5810-7 - Sp Gr Ur Refractometry
- 5810-7 - Sp Gr Ur Refractometry
Result Turnaround Time
0-1 day
Related Documents
For more information, please review the documents below
Specimen
Urine
Volume
20 mL
Minimum Volume
1 mL
Container
Plastic urine container
Collection Instructions
Collect a random urine specimen; no preservative.
Causes for Rejection
Urine with contrast dye, glucose, or excessive protein should not be evaluated with this test.
Stability Requirements
| Temperature | Period |
|---|---|
| Refrigerated | 7 days |
| Frozen | 7 days |