Tube Type

Test ID   LAB706
EPIC Order
CPT Code(s)   82491
Group/Individual Test   Individual
Laboratory   Core Lab - performed by: Special Chemistry Laboratory
Tube Station   30
Specimen Routine: 1 royal blue top (preferred sample); see Comments
  micro: 1 mL - one full red top microcollection device

Room Temperature: 4 Hours

Off Site Collections:
Centrifuge sample; aliquot serum (min vol 200µl) & refrigerate within 4 hours of collection
Refrigerated  2 - 8  °C: 3 days
Ambient: Not acceptable
Frozen: Not Acceptable
Availability Routine: Monday-Friday; Not available STAT
Turnaround Time   2 Days
Therapeutic Range   15-25 µg/mL (trough)
  Critical: >30 µg/mL

Samples must be in Core laboratory by 2:00pm Monday-Friday for same day testing.

Collection Information: Caffeine samples should be collected as trough level immediately before the next dose.

Multiple test requests with same sample type will require additional volumes for testing.

Pediatric microcollection devices available from Phlebotomy Services

Method: Liquid Chromatography Tandem Mass Spectrometry

Reviewed by Christopher Parker on February 26, 2019

Note: Reference ranges provided on this web site are for guidance only, and may not reflect the most recent changes. Refer to laboratory reports for current reference data.

UNC Hospitals
McLendon Clinical Laboratories
101 Manning Drive
Chapel Hill, NC 27514