Theophylline

Theophylline

Test Code

878
80198
878
80198
Not offered in Quest Diagnostics Nichols Institute (IFD) – San Juan Capistrano. Please provide SERVICE AREA INFORMATION to confirm Test Code for the lab that services your account or to find available tests you can order.
In-home collection may be available in your area for purchase through Quest Mobile.

Clinical Significance

Theophylline - 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.

Test Resources

Topic Brief

Drug Half-Life, Steady State, and Recommended Sample Collection Time

Test Details

Patient Preparation

Collect as a trough just prior to next dose

Methodology

Immunoassay (IA)

Reference Range(s)

≤5 Months 5.0-10.0 mg/L
>5 Months 10.0-20.0 mg/L

Alternative Name(s)

Marax®, Quandrinal™, Quibron®, Aminophylline

LOINC® Codes, Performing Laboratory

Service Area must be determined
Collect as a trough just prior to next dose

Methodology

Immunoassay (IA)

Reference Range(s)

≤5 Months 5.0-10.0 mg/L
>5 Months 10.0-20.0 mg/L

Alternative Name(s)

Marax®, Quandrinal™, Quibron®, Aminophylline
Service Area must be determined

Preferred Specimen(s)

1 mL serum collected in a red-top tube (no gel)

Alternative Specimen(s)

Plasma collected in: Sodium heparin (green-top) tube, lithium heparin (green-top) tube, or EDTA (lavender-top) tube

Minimum Volume

0.2 mL

Transport Container

Transport tube

Transport Temperature

Room temperature

Specimen Stability

  • Room temperature: 6 days
  • Refrigerated: 7 days
  • Frozen: 90 days

Reject Criteria

Serum separator tube (SST)

Setup Schedule

Service Area must be determined
1 mL serum collected in a red-top tube (no gel)
Plasma collected in: Sodium heparin (green-top) tube, lithium heparin (green-top) tube, or EDTA (lavender-top) tube
0.2 mL
Transport tube
Room temperature
Room temperature: 6 days
Refrigerated: 7 days
Frozen: 90 days
Serum separator tube (SST)
Service Area must be determined
Not offered in Quest Diagnostics Nichols Institute (IFD) – San Juan Capistrano. Please provide SERVICE AREA INFORMATION to confirm Test Code for the lab that services your account or to find available tests you can order.
In-home collection may be available in your area for purchase through Quest Mobile.
Test Details

Clinical Significance

Test Resources

Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.

The CPT codes provided are based on AMA guidance and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.

This material contains content from LOINC® (http://loinc.org). The LOINC Table, LOINC Table Core are copyright © 1995-2019, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee and is available at no cost under the license at http://loinc.org/license.

The tests listed by specialty and category are a select group of tests offered. For a complete list of Quest Diagnostics tests, please adjust the filter options chosen, or refer to our Directory of Services.

Customize the test information for your Service Area