Creatinine, Body Fluid

Test Code

FCREA

Alias/See Also

Epic: LAB65

Preferred Specimen

Specimen Type: Body fluid
Preferred Source: Synovial, Pleural, Ascites, Pericardial, Peritoneal, Amniotic
Collection Container: Green top (Lithium heparin)
Specimen Volume:

Minimum Volume

0.5 mL

Other Acceptable Specimens

Specimen Type: Body fluid
Collection Container: Sterile container

Instructions

Specimen source indicated on specimen is required

Specimen Stability

Room temperature: Unacceptable
Refrigerated: 5 days
Frozen: Unacceptable

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Unlabeled, mislabeled, wrong tube type, QNS, exceeds specimen stability requirements.

Methodology

Kinetic Alkaline Picrate

Setup Schedule

Daily

Report Available

1 day

Limitations

References indicate clinically insignificant interference from bilirubin or hemoglobin. Not evaluated for lipemia exceeding 1000 mg/dL triglycerides.

Reference Range

See laboratory report

Clinical Significance

Creatinine is eliminated by glomerular filtration. Creatinine is used to monitor acute and chronic renal disease, estimate glomerular filtration, and to assess the status of renal patients. Urine creatinine is used to calculate creatinine clearance, measure 24-hour urine collections, and serves as a reference quantity for other analytes. Creatinine levels may also play a role in the administration/dosage of certain medications, i.e. aminoglycosides and digoxin.

Performing Laboratory
Inova Laboratories
2832 Juniper Street
Fairfax, VA 22031

Last Updated: March 7, 2023
Last Review: N. Wolford, March 7, 2023

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.