Laboratory Services

Urea Nitrogen, Body Fluid

Print this page

Updated Test Information:

Test Description
Urea Nitrogen, Body Fluid
Synonym(s)

UNBF

General Information

To help identify the presence of urine as a cause for accumulation of fluid in a body compartment.

Container Type

Transport Tube, Red Top Tube, Li-Heparin Tube,  or Aliquot Tube

Specimen Type

Peritoneal Fluid, Pleural Fluid, Drain Fluid (JP drain), Pericardial, Peritoneal dialysate, Ascites

Specimen Requirements

Date and Time of collection are required. Specimen source is required

Specimen Collection / Processing Instructions

Indicate body fluid type and source (if applicable)


Preferred: Depending on the volume, take an aliquot and centrifuge to remove any cellular material and transfer to a plastic aliquot tube. Indicate the body fluid type, source location, and time of collection on the label.


Acceptable: Submit specimen in non-centrifuged collection container such as a plain red top or Li-Heparin tube.  Indicate the body fluid type, source location, and time of collection on the label.

Minimum Sample Volume

0.5 mLs

Stability

Room Temp - 24 hrs


Refrigerated - 7 days


Frozen - 30 days

Unacceptable Specimen Conditions

Specimen types other than those listed

Methodology

Kinetic UV assay

Estimated TAT

0-2 days

Testing Schedule

Monday - Saturday

CPT Code(s)

84520

Reference Range

Reference range not established for sample type

Performing Lab

Incyte

LOINC Code(s)

3093-2


14725-6