Theophylline : 878

Test Code
QTHEO 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


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



The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.