Theophylline, Plasma (Referred Out) - Saskatoon
Discipline
Biochemistry
Overview
Description
Ordering recommendation
- For trough level tests, collect specimen immediately prior to the next dose
Alias
- Aminophylline
Specimen Information
Specimen types accepted
- Plasma
Specimen collection container
- Preferred collection container: Lavender (EDTA)
Required volume
- Optimal volume: 4.5 mL full collection tube
- Minimum volume: 1.0 mL
(Submitting the minimum volume makes it impossible to repeat the test or perform confirmatory/reflex testing. In some situations, a minimum volume may require a second collection.)
Transport and stability
- 1 week at 2 – 8 ºC
Rejection criteria
- Specimens received where the proper collection protocols were not followed
- Pathology and Laboratory Medicine Acceptance and Rejection Criteria
Testing Information
Relevant clinical history
Relevant recent medication history
- Note on requisition the dosage, date and time when medication was given
Performance
Days/times performed
| Availability |
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Maximum laboratory time
Results reporting
- 5 day turnaround time by testing laboratory
Last Updated: November 21, 2025