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HelpTest Code 534 Tobramycin, Trough
Additional Codes
ALAB: TOBT
PowerChart: Tobramycin Trough Level
Test Method
Turbidimetric Inhibition Immunoassay; Beckman DXC880i
Specimen Requirement
0.5 mL of serum or plasma is required for testing.
Additional Specimen Collection Information
Collect blood in a lithium heparin green-top or red-top tube. Serum and plasma gel tubes are not acceptable. Trough specimens are collected prior to next dose. Serum or plasma should be separated from contact with cells within 2 hours of collection. Serum or plasma should be stored be refrigerated if assay is not completed within 8 hours. After 48 hours freeze @ -15 to -70 C, only thaw once. Lipemic samples >3+ turbidity must be cleared prior to analysis.
Performance
Testing is performed Monday through Sunday.
Routine: Typically completed within 4 hours after the specimen arrives at the testing site.
Expedite: Typically completed within 2 hours after the specimen arrives at the testing site.
STAT: Typically completed within 1 hour after the specimen arrives at the testing site.
Reference Values
<2 mcg/mL
- Toxic Level: >2 mcg/mL
CPT Code Information
80200 Therapeutic Drug Levels; Tobramycin
Useful For
Monitoring adequacy of serum concentration during tobramycin therapy
LOINC Code Information
4059-2 Tobramycin [Mass/Volume] In Serum Or Plasma-Trough