Caffeine
Test Summary
Coffee, tea and other beverages may contain caffeine. Caffeine is a methylxanthine found in over the counter products and in prescription medications. Small premature infants with mild respiratory distress shortly after birth may be treated with theophylline or caffeine. In neonates, a significant amount of theophylline is converted to caffeine. Since the demethylation pathway of theophylline is relatively undeveloped, caffeine levels may be elevated. Caffeine clearance rates typically reach adult values at about 3-4 months of age.
Aliases
- N/A
Specimen Collection
Special Instructions
Collect as a trough just prior to next dose
Preferred Specimen
1 mL serum collected in a red-top tube (no gel)
Minimum Volume
0.2 Ml
Instructions
N/A
Patient Preparation
N/A
Storage
N/A
Transport Temperature
Room temperature
Specimen Stability
- Room temperature: 5 days
- Refrigerated: 7 days
- Frozen: Unacceptable
Limitations
N/A
Other Acceptable Specimens
N/A
Unacceptable Specimens
Serum separator tube (SST)
Order Code
CAFFE
EPIC (Premier) Code
LAB483
Includes
N/A
CPT Code
- 80155
Billing Code
- 671168
CPT Statement
Methodology
Immunoassay (IA)
FDA Status
FDA Approved
Physician Attestation of Informed Consent
N/A
Testing Laboratory
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly VA, 20153
14225 Newbrook Drive
Chantilly VA, 20153
Department
Reference Testing
Reference Range
8.0-20.0 mg/L
Setup Schedule / Expected Turnaround Time
Monday - Saturday; Report available: 1 - 2 days
Specimen Collection
Special Instructions
Collect as a trough just prior to next dose
Preferred Specimen
1 mL serum collected in a red-top tube (no gel)
Minimum Volume
0.2 Ml
Instructions
N/A
Patient Preparation
N/A
Storage
N/A
Transport Temperature
Room temperature
Specimen Stability
- Room temperature: 5 days
- Refrigerated: 7 days
- Frozen: Unacceptable
Limitations
N/A
Other Acceptable Specimens
N/A
Unacceptable Specimens
Serum separator tube (SST)
Result Information
Methodology
Immunoassay (IA)
Testing Laboratory
N/A
Reference Range
8.0-20.0 mg/L
Setup Schedule / Expected Turnaround Time
Monday - Saturday; Report available: 1 - 2 days