Printable Test Catalog - OU Medicine

MINIMUM VOLUME: 0.6 mL
TEST AVAILABILITY: Daily
TURNAROUND TIME: 24 hours
OTHER NAMES: Mexate; MTX, Blood; Rheumatrex; Trexall
METHODOLOGY: Fluorescent polarization immunoassay (FPIA)
CLINICAL USE: Monitor therapeutic levels and evaluate potential
toxicity
CPT: 80299
[METPHE] Methylphenidate (Ritalin) Level
SPECIMEN REQUIRED: Frozen plasma or serum
TUBE OR CONTAINER: Red, Dark green (heparin) or Lavender (EDTA)
SPECIAL HANDLING: Collect as a peak level 1-2 hours after dosing
Do NOT collect in gel barrier tube
SPECIMEN VOLUME: 3 mL
MINIMUM VOLUME: 1.1 mL
TEST AVAILABILITY: Daily
REFERENCE RANGE: Therapeutic: 5.0-20.0 ng/mL
Potentially toxic: >40.0 ng/mL
OTHER NAMES: Ritalin
METHODOLOGY: Gas chromatography/nitrogen-phosphorus detector
(GC-NPD)
CLINICAL USE: Therapeutic drug monitoring
CPT: 80299
[METPL] METANEPHERINE PLASMA
SPECIMEN REQUIRED: Frozen plasma
TUBE OR CONTAINER: EDTA (lavender)
SPECIAL HANDLING: Patient should be fasting overnight (water
and non-caffeinated soft drinks are
permissible)
The patient should be in a supine position
for at least 15 minutes before and during
sample collection
It is preferable, but not essential, to draw
the sample without a tourniquet
SPECIMEN VOLUME: 2 mL
MINIMUM VOLUME: 1.5 mL
TEST INCLUDES: Metanephrine; normetanephrine
TEST AVAILABILITY: Daily
REFERENCE RANGE: Normetanephrine: 0-145 pg/mL
Metanephrine: 0-62 pg/mL
OTHER NAMES: Metanephrine; Normetanephrine; Plasma
Metanephrines
METHODOLOGY: High-pressure liquid chromatography (HPLC)
CLINICAL USE: Diagnose pheochromocytoma, a catecholaminesecreting
tumor of the adrenal medulla
CPT: 83835
[METSCR] METANEPHRINE PHEOCHROMOCYTOMA