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Item Value
Approval req'd? No
Available Stat? No
Test code CAFF
Performed by Quest
Sendout? Yes
Method Immunoassay
Collection Instructions For therapeutic monitoring draw trough level just before next dose.
Container type Red top (Gold top NOT acceptable)
Amount to Collect 2 mL blood
Sample type Serum
Preferred volume 1 mL serum
Min. Volume 0.5 mL serum
UCSF Rejection Criteria Sample collected in Gold top
Processing notes Refrigerate serum. Order Quest # 305
Units mg/L
Normal range
Therapeutic 8-20 mg/L Potentially Toxic > 50 mg/L
Stability Room temperature 5 days, refrigerated 1 week, frozen at -20C 1 month
Turn around times Test run Monday-Friday mornings. Turnaround time: 1-4 days.
Additional information Expected levels in individuals taking over-the-counter caffeine preparations are 3-6 mg/L.
CPT coding 80299-90
LOINC code 3422-3
Last Updated 10/28/2013 11:48:28 AM
Entry Number 158
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