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Specific Gravity, Body Fluid
Test Code8463
CPT Codes
84315
Preferred Specimen
1 mL body fluid collected in a sterile leak-proof container
Minimum Volume
0.5 mL
Instructions
Do not centrifuge samples.
Submit specimen in sterile, leak-proof container, refrigerated (cold packs). Refrigerate at 2-8°C and send to lab on refrigerated coolant, or freeze at -20°C or lower and send frozen samples on dry ice.
Submit specimen in sterile, leak-proof container, refrigerated (cold packs). Refrigerate at 2-8°C and send to lab on refrigerated coolant, or freeze at -20°C or lower and send frozen samples on dry ice.
Transport Temperature
Refrigerated (cold packs)
Specimen Stability
Room temperature: Unacceptable
Refrigerated: 7 days
Frozen: 7 days
Refrigerated: 7 days
Frozen: 7 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis • Lipemia • Clotted • Mucoid
Methodology
Refractometry
FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by the FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.
Setup Schedule
Set up: Daily; Report available: 1-2 days
Reference Range
See Laboratory Report
Clinical Significance
Determination of body fluid SG can aid in the distinction between transudative and exudative fluid.
