Sign in →

Test Code LAB65 Creatinine, Body Fluid

Performing Laboratory

Barnes-Jewish Hospital

Methodology

Enzymatic

 

Literature Reference: Package insert: Creatinine CREP2 reagent. Roche Corporation, 09/2015.

Specimen Requirements

Specimen Type: Pleural fluid, Ascites fluid, J-P fluid

Container/Tube: Mint Green top tube

Specimen Volume: 2mL

Indicate fluid type on specimen container

Test Classification and CPT Coding

82570

Reference Values

Pleural fluid to serum creatinine ratio >1.0 is indicative of urinothorax.
Ascites fluid to serum creatinine ratio >1.0 is indicative of urine leakage into the peritoneal cavity.
J-P fluid to serum creatinine ratio >1.0 is indicative of urine leakage into drain fluid.
 

Literature References: Block, Darci R. Tietz Textbook of clinical Chemistry and Molecular Diagnositics. Elsevier Sixth Edition 2017. Body Fluids Abstract p. 925

Yataco, Jose C, Cleveland Clinic Journal of Medicine. Pleural effusions: Evaluation and Management. October 2005. Volume 72, Number 10.

ARUP Test directory, Body Fluid Reference Intervals and/or Interpretative Information.
 

Additional Information

For BJH Laboratory Use Only

Alternate Tube Type: Red top tube

Analyte Stability:

See Analyte Stability Chart under General Information for a complete list.

 

Laboratory Processing Instructions: Test performed in BJH Core lab. If specimen is received in a VACUTAINER, check procedure to confirm suitability. Centrifuge upon receipt. Apply blue tape to specimen aliquot tube. Deliver to the Cobas 8000 for analysis. Completed specimens are stored frozen for 30 days.

Day(s) Test Set UP

Monday through Sunday

 

Turnaround Time:

Stat: 1 hour after receipt in laboratory

Routine: 2 to 4 hours after receipt in laboratory

LOINC Code Information

Pleural - 12190-5

Ascites – 12191-3