| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
Theophylline
Test CodeTHEOP
Alias/See Also
LAB35
CPT Codes
<p>80198</p>
Preferred Specimen
Specimen Type: Serum
Collection Container/Type: Red top
Submission Container/Tube: Plastic vial
Specimen Volume: 1 mL
Collection Instructions: Collect as a trough just prior to next dose.
Specimen Type: Plasma
Collection Container/Type
Preferred: Lavender top (EDTA)
Acceptable: Green top (Lithium heparin or sodium heparin)
Submission Container/Tube: Plastic vial.
Specimen Volume: 1 mL
Collection Instructions: Collect as a trough just prior to next dose
Minimum Volume
0.2 mL
Other Acceptable Specimens
Plasma collected in: Sodium heparin (green-top) tube, lithium heparin (green-top) tube, or EDTA (lavender-top) tube
Instructions
Collect as a trough just prior to next dose.
Transport Container
Plastic screw-cap vial
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 6 days
Refrigerated: 7 days
Frozen: 90 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Serum separator tube (SST ®)
Methodology
Immunoassay (IA)
Setup Schedule
Set up: Mon-Thurs p.m.; Report available: Next day
Report Available
Next day
Reference Range
| ≤5 Months | 5.0-10.0 mg/L | |
| >5 Months | 10.0-20.0 mg/L | |
Clinical Significance
Theophylline is used in the treatment of bronchial asthma as well as in the treatment of chronic obstructive pulmonary disease and episodes of prolonged apnea in pre-term infants. Theophylline levels are monitored to assure adequate therapeutic levels are achieved and to avoid toxicity.
Performing Laboratory
Quest Diagnostics Nichols Institute 14225 Newbrook Drive Chantilly, VA 20153
Last Updated: February 20, 2023