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23080 Theophylline

Theophylline
Test Code: THEO
Synonyms/Keywords
Aminophylline​
Useful For
Theophylline (1,3-dimethylxanthine), a naturally occurring compound with bronchodilator and antibronchospasm effects, is considered the primary drug of choice in the treatment and prevention of asthma in children and adults. ​
Specimen Requirements
Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)
Pediatric Minimum Volume
(no repeat)
​NoSerum​Serum Separator Tube (SST)​Red Top Tube (RTT)​0.5 mL​0.3 mL​0.5 mL whole blood​
Collection Processing Instructions
Serum should be removed from cells within 1 hour.​
Specimen Stability Information
Specimen Type Temperature Time
Serum​ ​ ​ Ambient​ 1 day​
Refrigerate​ 7 days​
Frozen​ 1 year​
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Marshfield​ Monday through Sunday​ Less than 2 hours​ Emit* 2000 Rate Assay/Beckman AU​
Reference Range Information
Performing Location Reference Range
All Performing Sites
              <6 months:  10.0  - 15.0 µg/mL
              ≥6 months:  10.0 – 20.0 µg/mL
Outreach CPTs
CPT Modifier
(if needed)
Quantity Description Comments
80198 ​
Synonyms/Keywords
Aminophylline​
Ordering Applications
Ordering Application Description
​Centricity

​a. Theophylline

b. Theophylline (Aminophylline)

​Cerner ​Theophylline Level
If the ordering application you are looking for is not listed, contact your local laboratory for assistance.
Specimen Requirements
Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)
Pediatric Minimum Volume
(no repeat)
​NoSerum​Serum Separator Tube (SST)​Red Top Tube (RTT)​0.5 mL​0.3 mL​0.5 mL whole blood​
Collection Processing
Serum should be removed from cells within 1 hour.​
Specimen Stability Information
Specimen Type Temperature Time
Serum​ ​ ​ Ambient​ 1 day​
Refrigerate​ 7 days​
Frozen​ 1 year​
Useful For
Theophylline (1,3-dimethylxanthine), a naturally occurring compound with bronchodilator and antibronchospasm effects, is considered the primary drug of choice in the treatment and prevention of asthma in children and adults. ​
Reference Range Information
Performing Location Reference Range
All Performing Sites
              <6 months:  10.0  - 15.0 µg/mL
              ≥6 months:  10.0 – 20.0 µg/mL
For more information visit:
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Marshfield​ Monday through Sunday​ Less than 2 hours​ Emit* 2000 Rate Assay/Beckman AU​
For billing questions, see Contacts
Outreach CPTs
CPT Modifier
(if needed)
Quantity Description Comments
80198 ​
For most current information refer to the Marshfield Laboratory online reference manual.