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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
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.
