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Theophylline, Plasma or Serum
Test Code1240
CPT Codes
80198
Preferred Specimen
Submit only 1 of the following specimens:
Plasma
Container/Tube: Green-top (heparin) tube(s)
Specimen Volume: 3 mL (minimum volume: 0.5 mL) of plasma
Collection Instructions: Trough level should be drawn 30 minutes before dose, and peak level should be drawn 2 hours after dose for fast release preparations and 4 hours after dose for slow release preparations. Random level is acceptable.
Note: 1. Dosage time and route of administration are required. 2. Indicate plasma and as peak, random, or trough. 3. Label specimen appropriately (plasma and as peak, random, or trough).
Serum
Container/Tube: Serum gel tube(s)
Specimen Volume: 3 mL (minimum volume: 0.5 mL) of serum
Collection Instructions: Trough level should be drawn 30 minutes before dose, and peak level should be drawn 2 hours after dose for fast release preparations and 4 hours after dose for slow release preparations. Random level is acceptable.
Note: 1. Dosage time and route of administration are required. 2. Indicate serum and as peak, random, or trough. 3. Label specimen appropriately (serum and as peak, random, or trough).
Plasma
Container/Tube: Green-top (heparin) tube(s)
Specimen Volume: 3 mL (minimum volume: 0.5 mL) of plasma
Collection Instructions: Trough level should be drawn 30 minutes before dose, and peak level should be drawn 2 hours after dose for fast release preparations and 4 hours after dose for slow release preparations. Random level is acceptable.
Note: 1. Dosage time and route of administration are required. 2. Indicate plasma and as peak, random, or trough. 3. Label specimen appropriately (plasma and as peak, random, or trough).
Serum
Container/Tube: Serum gel tube(s)
Specimen Volume: 3 mL (minimum volume: 0.5 mL) of serum
Collection Instructions: Trough level should be drawn 30 minutes before dose, and peak level should be drawn 2 hours after dose for fast release preparations and 4 hours after dose for slow release preparations. Random level is acceptable.
Note: 1. Dosage time and route of administration are required. 2. Indicate serum and as peak, random, or trough. 3. Label specimen appropriately (serum and as peak, random, or trough).
Minimum Volume
Pediatric volume: 0.3 mL
Transport Temperature
Refrigerate
Methodology
Particle Enhanced Turbidimetric Inhibition Immunoassay
Setup Schedule
Monday through Sunday
Reference Range
Therapeutic concentration: 10.0-20.0 µg/mL
Toxic concentration (automatic call-back): >=20.1 µg/mL
Toxic concentration (automatic call-back): >=20.1 µg/mL
Clinical Significance
Useful for therapeutic monitoring.
Performed By
CoxHealth
