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Creatinine, Body Fluid
(Not a routinely available test. See 'Additional information')

Item Value
Approval req'd? No
Available Stat? Yes
Test code CRB
Test group Creatinine
Performed by Parnassus & Mission Bay Chemistry
In House Availability Test available 24 hours per day 7 days per week
Method Spectrophotometric, kinetic (alkaline picrate,Jaffe) assay on Beckman DXC 600/800 analyzers. Calibration traceable to isotope dilution mass spec (IDMS) standardization

Click here for more information on Parnassus assay
Collection Instructions Specimen label must contain the date the sample was collected and the legible name of the person who collected the sample.
Container type Red top or clean container
Amount to Collect 5 mL fluid
Sample type Body Fluid
Preferred volume 1 mL fluid
Min. Volume 0.2 mL fluid
Units mg/dL
Normal range None established. If urine leakage into a body cavity has occurred, the concentration of creatinine in the body fluid may be within the concentration range of creatinine found in urine. Random urine creatinine concentrations are typically between 80 mg/dL to 150 mg/dL and can range from approximately 20 mg/dL to 300 mg/dL (see Barr, DB et al. Environmental Health Perspectives 113:192-200, 2005).
Stability Room temperature 8 hours, refrigerated 2 days, frozen at -20C 1 week
Turn around times STAT 1 hour, Routine 4 hours
Additional information As normal samples are not available for validating the performance of this assay, the UCSF Clinical laboratory makes no claims with regard to the accuracy of the result.

All results will be appended with a disclaimer: "The reference range and other method performance specifications have not been established by the UCSF Clinical Laboratory for this body fluid. The test result must be integrated into the clinical context for interpretation."
CPT coding 82570
LOINC code 12190-5
Last Updated 5/29/2016 9:53:40 PM
Entry Number 264
Lab Procedure Link Click here for Procedure
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