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Theophylline : 878
Test CodeQTHEO or 878
Alias/See Also
Marax®, Quandrinal™, Quibron®, Aminophylline
CPT Codes
80198
Instructions
Collect as a trough just prior to next dose.
Transport Container
Preferred Specimen
1 mL serum collected in a red-top tube (no gel)
Alternative Specimens
Plasma collected in: Sodium heparin (green-top) tube, lithium heparin (green-top) tube, or EDTA (lavender-top) tube
Minimum Volume
0.2 mL
1 mL serum collected in a red-top tube (no gel)
Alternative Specimens
Plasma collected in: Sodium heparin (green-top) tube, lithium heparin (green-top) tube, or EDTA (lavender-top) tube
Minimum Volume
0.2 mL
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
FDA Status
FDA
Setup Schedule
Tuesday - Saturday
Report Available
4 days
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