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HelpTest Code CRBF Creatinine, Body Fluid
Additional Codes
CNE Order Code: BF Crea
Reporting Name
Creatinine, BFPerforming 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
Specimen Type: Body fluid
Preferred Source:
-Peritoneal fluid (peritoneal, abdominal, ascites, paracentesis)
-Pleural fluid (pleural, chest, thoracentesis)
-Drain fluid (drainage, 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 | Special Container |
|---|---|---|---|
| Body Fluid | Refrigerated (preferred) | 7 days | |
| Frozen | 30 days | ||
| Ambient | 24 hours |
Reference Values
An interpretive report will be provided.
Day(s) Performed
Monday through Sunday
CPT Code Information
82570
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| CRBF | Creatinine, BF | 12190-5 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| CR_BF | Creatinine, BF | 12190-5 |
| FLD13 | Fluid Type, Creatinine | 14725-6 |
Report Available
Same day/1 to 2 daysReject Due To
| Gross hemolysis | Reject |
| Gross lipemia | Reject |
| Gross icterus | Reject |
| Anticoagulant or additive Breast milk Nasal secretions Gastric secretions Bronchoalveolar lavage (BAL) or bronchial washings Colostomy/ostomy Feces Urine Saliva Sputum Vitreous fluid |
Reject |
Method Name
Enzymatic
Useful For
Identifying the presence of urine as a cause for accumulation of fluid in a body compartment
Measuring the ultrafiltration capacity of the peritoneal membrane in patients receiving peritoneal dialysis
Interpretation
Peritoneal, pleural, and drain fluid concentrations should be compared to serum or plasma. Fluid to serum ratios above 1.0 suggest the specimen may be contaminated with urine.(1-4)
Peritoneal dialysate fluid to serum creatinine ratios can be calculated from timed collections to determine peritoneal membrane transport rates.(5)
All other fluids: results should be interpreted in conjunction with serum creatinine and other clinical findings.
Forms
If not ordering electronically, complete, print, and send a Renal Diagnostics Test Request (T830) with the specimen.