Caffeine


Abbrev Code:CAF   
Order Code:LAB1217Order Name:Caffeine, Serum or Plasma
Methodology:Quantitative enzyme multiplied immunoassay technique
CPT Codes: 80155 x1, 8015501 x1
Turnaround Time:Specimens are sent to the reference laboratory Sun-Sat; results are reported within 1-5 days.
Compliance:

This test uses an in vitro diagnostic (IVD) that has been cleared or approved by the FDA.



Collection Instructions

Specimen:Blood
Optimal Volume:1 mL
Minimum\Peds Volume:0.6 mL
Container:Red (no gel)
Alternate Containers: Purple (EDTA)
Collection Instructions:Usual sampling time is immediately prior to next dose (trough).
Causes for Rejection:Citrated plasma; collected in a gel tube.


Processing and Shipping

Specimen Processing:Centrifuge and separate from cells ASAP or within 6 hours of collection. Aliquot 0.5 mL, 0.2 mL minimum serum or plasma. Store in refrigerator.
Shipping Instructions:Ship at refrigerated temperature.
Stability:1 week at room temperature or refrigerated; 2 months frozen.
Test Performed at or Referral Lab Lab Sendouts  (ARUP)
Referral Lab number:2011603


Interpretive

Critical Range:Toxic Level: >20 μg/mL.
Toxic concentrations may cause tremor, cardiac abnormaliites and seizures.
Therapeutic Range:0-28 days: 8-20 μg/mL
29 days & older: ≤20 μg/mL (not well established)
Use:Therapeutic monitoring for patients receiving caffeine therapy.


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