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HelpTest ID THEO Theophylline, Serum
Specimen Required
Supplies: Sarstedt Aliquot Tube, 5 mL (T914)
Container/Tube:
Preferred: Serum gel
Acceptable: Red top
Submission Container/Tube: Plastic vial
Specimen Volume: 0.5 mL Serum
Collection Instructions:
1. Within 2 hours of collection, centrifuge the specimen.
2. For serum gel tubes, serum may sit on gel refrigerated or aliquoted into a plastic vial.
3. For red top tubes, aliquot serum immediately into a plastic vial.
Secondary ID
8661Useful For
Assessing and adjusting theophylline dosage for optimal therapeutic level
Assessing theophylline toxicity
Specimen Type
SerumSpecimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Serum | Refrigerated (preferred) | 14 days |
| Frozen | 28 days | |
| Ambient | 72 hours |
Reject Due To
| Gross hemolysis | Reject |
Reference Values
Therapeutic:
Bronchodilation: 8.0-20.0 mcg/mL
Neonatal apnea (≤4 weeks old): 6.0-13.0 mcg/mL
Critical value: >20.0 mcg/mL
Day(s) Performed
Monday through Saturday
Report Available
Same day/1 to 2 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
80198
Forms
If not ordering electronically, complete, print, and send a Therapeutics Test Request (T831) with the specimen.