Theophylline

Message

Test performed at York Hospital Laboratory.

Test Code

THEO

CPT Codes
80198

Preferred Specimen

0.2 mL serum collected in a serum separator tube (SST)

Other Acceptable Specimens

0.2 mL serum collected in a no additive (red-top) tube, transferred to a plastic screw-cap vial 0.2 mL plasma collected in a lithium heparin (green-top) gel separator tube

Instructions

Separate serum or plasma from the cells within 4 hours of collection.

Transport Temperature

Refrigerated

Specimen Stability

Room temperature: 7 days
Refrigerated: 7 days
Frozen: 2 months

Methodology
Spectrophotometry

Setup Schedule

Daily

Report Available

Next Day

Reference Range

10.0-20.0 mg/L Detection Limit: 1.0 mg/L Critical Values >20.0 mg/dL

Clinical Significance

Theophylline is a drug used in the treatment of asthma. Theophylline is an effective bronchodilator. Theophylline measurements are used to monitor patient compliance and therapy and to diagnose potential overdose. Toxic effects include nausea, vomiting, diarrhea, headache, tachycardia, arrhythmias, and convulsions.

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.