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Tyrosine, plasma

Item Value
Approval req'd? No
Available Stat? No
Test code TYRO
Performed by Quest
Sendout? Yes
Method LCMS
Patient Preparation Collect specimen after an overnight fast (or at least 4 hours after a meal) if possible. Non-fasting samples are acceptable for pediatric patients
Collection Instructions Provide the patient's age and sex, a brief clinical history and tentative diagnosis, and a description of drug, infant formula or dietary therapy or X-rays in the previous three days.
Container type Dark Green top
Amount to Collect 1 mL blood
Sample type Heparinized plasma
Preferred volume 0.4 mL plasma
Min. Volume 0.2 mL plasma
Processing notes Separate and immediately freeze plasma at -20C. Order Quest # 30791P
Units µmol/L
Normal range
0-30 days 33-160 µmol/L
31 days-23 months 24-125 µmol/L 2-17 years 31-108 µmol/L ≥ 18 years 38-96 µmol/L
Stability Room temperature unacceptable, refrigerated 7 days, frozen at -20C 30 days
Turn around times Set up at least 3x weekly. Turnaround time: 3-5 days.
CPT coding 84510-90
LOINC code 20660-7
Last Updated 2/19/2014 1:46:45 PM
Entry Number 992
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