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HelpTest Code UA SG Auto Urine, Specific Gravity (Automated)
Aliases
Specific Gravity Urine Automated
Useful For
Urine Specific Gravity compares the density of urine with the density of water. This test can help determine how well the kidneys are diluting the urine.
Patient Preparation
No special patient preparation required
Collection Method
Urine in a sterile container
Minimum Volume
3 mL
Container
Sterile Cup
Preferred Specimen
Urine in Sterile container
Acceptable Specimens
Urine in Sterile container
Reference or Target Ranges
1.006 – 1.030
Critical Value
Not defined for this assay
Reasons for Rejection
| Hemolysis Threshold |
N/A |
| Icterus Threshold |
N/A |
| Lipemia Threshold |
N/A |
| Other |
QNS, improperly labeled, improper container |
Specimen Stability
| Ambient |
2 hours |
| Refrigerated (2°C to 8°C) |
24 hours |
| Frozen(-70°C to 0°C) |
N/A |
Performance Information
| Days and Time Performed |
24/7 |
| Expected Turn Around Time |
STAT: Within 1 hour
of arrival in lab Routine: Within 4 hours of arrival in lab |
| Stat Availabilty |
Yes |
| Performing Bench |
UH UA, WCH UH |
| Methodology/Method Description |
iRIS – Specific gravity is a measure of the dissolve substances present in the urine. The specific gravity is obtained by measuring the refraction angles of light passing through a triange prism. |
Additional Information/Important Notes
- This specific gravity method differs from other specific gravity methods and therefore may produce slightly different results.
- Highly buffered urine may cause low readings.
- Moderate quantities of protein may cause an increased specific gravity.
- The specific gravity is not affected by non-ionic constituents such as glucose nor by the presences of radio opaque dyes.
CPT Codes
81003