LAB2532, Urine LAB2606, Body Fluid 9913, Urine 9375,Body Fluid
CPT Codes
81003 Urine 84315
Synonyms
Refractive Index, Urine
SG, Urine
Test Includes
Urine specific gravity is part of a routine urinalysis. Specific gravity may also be determined on body fluids other than urine.
Performing Laboratory / Facility
Ronald Reagan UCLA Medical Center Clinical Laboratory Santa Monica UCLA Medical Center and Orthopaedic Hospital UCLA Outreach Clinical Laboratory - Panorama City (BURL)
Performing Section
Urinalysis
Availability
Ronald Reagan UCLA Medical Center Clinical Laboratory and Santa Monica UCLA Medical Center and Orthopaedic Hospital: Daily, 24 hours (including holidays) Outreach Clinical Laboratory - Panorama City (BURL): Monday-Friday 0600-0230, Saturday 1200-2030 (excluding holidays)
Turnaround Time
Ronald Reagan UCLA Medical Center Clinical Laboratory and Santa Monica UCLA Medical Center and Orthopaedic Hospital: Routine 4 hours from receipt in the Laboratory; STAT 1 hour from receipt in the Laboratory Outreach Clinical Laboratory - Panorama City (BURL): Routine 24 hours; Stat: 4 hours from receipt in the laboratory
Methodology
Refractometer
Use
Evaluate concentrating and excretory power of the kidneys
Applies To
Specific Gravity, Body Fluid
Additional Information
The specific gravity of urine or fluid indicates the relative proportions of dissolved solid components to the total volume of the specimen. It reflects the relative degree of concentration or dilution of the specimen. Knowledge of the specific gravity is needed in interpretation of the results of most tests in urinalysis. Specific gravity must be interpreted in light of presence or absence of glycosuria and/or proteinuria. There is no "normal" value for specific gravity, except as it relates to the state of body water and electrolyte balance (eg, hydration vs dehydration, as of the time of collection).
Specimen Type
Random urine Body fluid
Container
Urine Container, Clean Catch Sterile Container Red BD Vacutainer UA Preservative Tube
Collection Instructions
First AM specimen is recommended for urine. Container must state date and time of collection. Transport to the Laboratory as soon as possible after collection.
Volume
5 mL
Minimum Volume
2 mL
Stability
Inpatient: 6 hours Outpatient:72 hours
Special Instructions
Plain (red) tube; no preservative also acceptable
Shipping and Handling Instructions
Refrigerate specimen if it cannot be processed immediately.
Body fluid specimens received at SMUCLA and BURL Lab is sent to RRUCLA Lab for testing.
Causes for Rejection
Specimen collected with preservative
Reference Range
Urine: 1.005-1.030 Fluid: No reference range
Test Information
Orderable Test Codes
LAB2532, Urine LAB2606, Body Fluid 9913, Urine 9375,Body Fluid
CPT Codes
81003 Urine 84315
Synonyms
Refractive Index, Urine
SG, Urine
Test Includes
Urine specific gravity is part of a routine urinalysis. Specific gravity may also be determined on body fluids other than urine.
Performing Laboratory / Facility
Ronald Reagan UCLA Medical Center Clinical Laboratory Santa Monica UCLA Medical Center and Orthopaedic Hospital UCLA Outreach Clinical Laboratory - Panorama City (BURL)
Performing Section
Urinalysis
Availability
Ronald Reagan UCLA Medical Center Clinical Laboratory and Santa Monica UCLA Medical Center and Orthopaedic Hospital: Daily, 24 hours (including holidays) Outreach Clinical Laboratory - Panorama City (BURL): Monday-Friday 0600-0230, Saturday 1200-2030 (excluding holidays)
Turnaround Time
Ronald Reagan UCLA Medical Center Clinical Laboratory and Santa Monica UCLA Medical Center and Orthopaedic Hospital: Routine 4 hours from receipt in the Laboratory; STAT 1 hour from receipt in the Laboratory Outreach Clinical Laboratory - Panorama City (BURL): Routine 24 hours; Stat: 4 hours from receipt in the laboratory
Methodology
Refractometer
Use
Evaluate concentrating and excretory power of the kidneys
Applies To
Specific Gravity, Body Fluid
Additional Information
The specific gravity of urine or fluid indicates the relative proportions of dissolved solid components to the total volume of the specimen. It reflects the relative degree of concentration or dilution of the specimen. Knowledge of the specific gravity is needed in interpretation of the results of most tests in urinalysis. Specific gravity must be interpreted in light of presence or absence of glycosuria and/or proteinuria. There is no "normal" value for specific gravity, except as it relates to the state of body water and electrolyte balance (eg, hydration vs dehydration, as of the time of collection).
Specimen Collection and Handling
Specimen Type
Random urine Body fluid
Container
Urine Container, Clean Catch Sterile Container Red BD Vacutainer UA Preservative Tube
Collection Instructions
First AM specimen is recommended for urine. Container must state date and time of collection. Transport to the Laboratory as soon as possible after collection.
Volume
5 mL
Minimum Volume
2 mL
Stability
Inpatient: 6 hours Outpatient:72 hours
Special Instructions
Plain (red) tube; no preservative also acceptable
Shipping and Handling Instructions
Refrigerate specimen if it cannot be processed immediately.
Body fluid specimens received at SMUCLA and BURL Lab is sent to RRUCLA Lab for testing.
