Printable Test Catalog - OU Medicine

[CREGUANU] UR CREATINE/GUANIDINOACETATE
SPECIMEN REQUIRED: Frozen urine
TUBE OR CONTAINER: Plastic urine container
SPECIMEN VOLUME: 1 mL
TEST INCLUDES: Creatine and Guanidinoacetate
TEST AVAILABILITY: Daily
TURNAROUND TIME: 6-8 days
REFERENCE RANGE: Creatine:
Children: 20 - 900 micromoles/mole creatinine
Adults: 12 - 500 micromoles/mole creatinine
Guanidinoacetate:
Children: 15 - 150 micromoles/mole creatinine
Adults: 10 - 120 micromoles/mole creatinine
METHODOLOGY: Isotope dilution tandem mass spectroscopy
CLINICAL USE: Assess abnormalities in the synthesis of creatine
CPT: 83789 x 2; 82570
[CRETM] UR CREATINE TIMED
SPECIMEN REQUIRED: Frozen urine aliquot from 24 hour collection
TUBE OR CONTAINER: Plastic urine container
SPECIAL HANDLING: Collect 24-hour urine in "P" container (no
preservative)
SPECIMEN VOLUME: 10 mL
MINIMUM VOLUME: 0.2 mL
TEST AVAILABILITY: Daily
REFERENCE RANGE: Male: 0-40 ml/24 hours
Female: 0-80 mg/24 hours
METHODOLOGY: Enzymatic (creatinase)/spectrophotometry
CLINICAL USE: Determine creatinuria
CPT: 82540
[CREUTZ] Creuzfeldt-Jakob Disease
SPECIMEN REQUIRED: Frozen CSF
TUBE OR CONTAINER: Screw-capped, sterile vial
SPECIMEN VOLUME: 2 mL
MINIMUM VOLUME: 1 mL
TEST AVAILABILITY: Daily
TURNAROUND TIME: 3-5 days
REFERENCE RANGE: < 2.0 ng/mL Normal
2.0 - 3.9 ng/mL Indeterminate
> or = 4.0 ng/mL Elevated
METHODOLOGY: Immunochemiluminometric Assay (ICMA)
CPT: 83516
[CROHNSP] CROHN'S PROGNOSTIC
SPECIMEN REQUIRED: Room temperature serum and whole blood
TUBE OR CONTAINER: Red or Gold and Lavender (EDTA)
SPECIMEN VOLUME: 2 mL (serum)
1 mL (whole blood)