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HelpTest Code LAB1232022 Urea Nitrogen, Body Fluid
Reporting Name
Urea Nitrogen, BFUseful For
Identifying the presence of urine as a cause for accumulation of fluid in a body compartment
Assessing adequacy of peritoneal dialysis treatment protocols
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
Body FluidNecessary Information
1. Date and time of collection are required.
2. Specimen source is required.
Specimen Required
Preferred Source:
-Peritoneal fluid (peritoneal, abdominal, ascites, paracentesis)
-Pleural fluid (pleural, chest, thoracentesis)
-Drain fluid (drainage, Jackson Pratt [JP] drain)
-Peritoneal dialysate (dialysis fluid)
-Pericardial
Acceptable Source: Write in source name with source location (if appropriate)
Collection Container/Tube: Sterile container
Submission Container/Tube: Plastic vial
Specimen Volume: 1 mL
Collection Instructions:
1. Centrifuge to remove any cellular material and transfer into a plastic vial.
2. Indicate the specimen source and source location on label.
Specimen Minimum Volume
0.5 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Body Fluid | Refrigerated (preferred) | 7 days |
| Frozen | 30 days | |
| Ambient | 24 hours |
Day(s) Performed
Monday through Sunday
CPT Code Information
84520
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| UEBF | Urea Nitrogen, BF | 3093-2 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| UE_BF | Urea Nitrogen, BF | 3093-2 |
| FLD15 | Fluid Type, Urea Nitrogen | 14725-6 |
Report Available
Same day/1 to 2 daysSpecimen Retention Time
1 weekReject Due To
| Gross hemolysis | Reject |
| Gross lipemia | Reject |
| Gross icterus | Reject |
| Cerebrospinal fluid Breast milk Saliva Nasal secretions Gastric secretions Bronchoalveolar lavage (BAL) or bronchial washings Colostomy/ostomy Feces Urine Sputum Vitreous fluid |
Reject |
Forms
If not ordering electronically, complete, print, and send a Renal Diagnostics Test Request (T830) with the specimen.
Reference Values
An interpretive report will be provided.