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HelpTest Code THEO Theophylline Level
Additional Codes
| EPIC | LAB6490 |
Synonyms
- Elixophylline
- Theochron
- Aminophylline
- Choledyl
- Oxtriphylline
- Slophylline
- Tedral
- Theodur
Clinical Significance
Theophylline is administered for the treatment of bronchial asthma and is monitored for possible toxicity, and as a guide for acute and maintenance therapy.
Source: Beckman Coulter Unicel, THE IFU. REF #469126 4/20/15
Methodology
Particle enhanced turbidimetric inhibition immunoassay (Beckman Coulter UniCel DxC 660i)
Sample Type
| Preferred Sample Type | |
|---|---|
| Light green top - Plasma | |
| Acceptable Sample Type(s) | |
|---|---|
| Dark green top - Plasma | |
| Yellow top - Serum | |
| Red top - Serum | |
Centrifuge: Yes
Specimen Minimum Volume
0.3 mL
Specimen Stability
| Temperature | Time |
|---|---|
| Ambient (18-25°C) | 8 hours |
| Refrigerated (2-8°C) (store) | 48 hours |
| Frozen (-15 to -20°C) | 1 month |
Separate plasma or serum from cells within 2 hours.
Reference Ranges
| Therapeutic Range |
|---|
| 10 - 20 ug/mL |
| Critical Value |
|---|
| >20 ug/mL |
| Technical Range |
|---|
| 2.0 - 40.0 ug/mL |
Rejection Criteria
| Hemolysis | N/A |
|---|---|
| Icterus | N/A |
| Lipemia | N/A |
Reject sodium heparanized plasma samples.
Availability
| Performed | STAT |
|---|---|
| 24/7 | Yes |
Performing Laboratory
MultiCare Yakima Memorial Hospital Laboratory
Lab Department
Chemistry
CPT Code
80198
LOINC
4049-3 Theophylline [Mass/Vol]