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Specific Gravity on Body Fluid

SIM

20660 

CPT

84315 

Synonyms

BF Specific Gravity 

Specimen Type

All body fluids except CSF.  Ex.:  Joint Fluid, Pericardial Fluid, Pleural fluid, Paracentesis fluid, Thoracentesis Fluid, Amniotic fluid, etc. 

Container

Sterile container or if prone to clot such as knee fluid, fluid may be placed in a lavender EDTA tube.

Collection Instructions

Collected by the physician

Volume

3 ml preferred and minimum 1ml

Additional Information

none

Patient Preparation

none

Specimen Processing Instructions

Transport within 1 hour of collection

Transport Requirements

Refrigerated

Specimen Stability

Refrigerated 2 hours 

Rejection Criteria

•  Clotted fluid 
•  Mucoid fluid 

Reference Range

None

Critical Value

None 

Test Includes

Specific Gravity 

Methodology

Refractive Index using a Refractometer 

Testing Frequency

Daily, Monday - Sunday 

 

Reviewed By

Sandy Hammett 

Reviewed Date

2/2/2018

Supplemental

 

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