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), or red top/gold top/green top/lavender top tube are also acceptable; see Comments
  micro: 1 mL - one full pink or red top bullet

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   24 hrs
Therapeutic Range
15-25 µg/mL (trough)
  Critical: >30 µg/mL
Internal Reference Testing Specimen Handling Instructions: Centrifuge, Aliquot, Refrigerate

Methodology:Liquid Chromatography Tandem Mass Spectrometry

Samples must be in Core laboratory by 2:00pm Monday-Friday for same day testing. Samples received after 2:00pm will be held for next scheduled run day.

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 microtainers (“bullets”) available from Phlebotomy Services

Reviewed by gloria_crawford on February 09, 2017

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