Test Overview
Clinical Utility
Monitor simultaneously with Theophylline.
Method
High performance liquid chromatography-Tandem mass spectrometry (HPLC-MS/MS)
Result Included
Caffeine
Specimen
Specimen Type
Avoid gel separator tubesSerum
Plasma (Li heparin)
Containers
Collection Containers
Red top (no additive); Green top (lithium heparin)
Volume
Sample Volume
1.0 mL
Minimum Volume
0.5 mL
Specimen Comment
Avoid gel separator tubes.
Collection & Handling
Collection Instructions
Draw trough specimen 0 – 4 hours prior to next dose.
Handling Information
Separate immediately. Store and send frozen.
Stability
| Ambient | Refrigerated | Frozen |
|---|---|---|
| 72 hours | 72 hours | 28 days |
Rejection Criteria
| Criteria | Specification |
|---|---|
| Specimen | Gel tube |
Performance & Interpretation
Turnaround Time
7 days
Results
Name
Units
Reference Range
Conversion
-
Caffeineµmol/LTherapeutic: 25 - 80µg/mL x 5.15
Referral Location
Canada
Interface & Setup
HL7 Interface Codes
| Order Code | Result Name | Result Codes | Units |
|---|---|---|---|
| CAFFLON | Caffeine,S | 62432 | umol/L |
Test Version
Last Updated
2022-10-20