Tobramycin Level Trough
Additional Codes
LAB38
Performing Laboratory
MBMC Main Laboratory
Methodology
Homogeneous enzyme immunoassay
Specimen Requirements
Specimen Type: Plasma
Container/Tube: Mint-green top (lithium heparin gel)
Specimen Volume: Full tube
Alternative Specimen Type: Serum
Alternative Container/Tube: Gold, Serum gel
Alternative Specimen Volume: Full tube
Collection Instructions: Collection time is as follows:
-Intravenous: 30 minutes before next dose
-Intramuscular: 30 minutes before next dose
-PEAK and TROUGH levels should be scheduled around the same
Specimen Transport Temperature
Ambient
Day(s) Test Set Up
Monday through Sunday
Turnaround Time:
STAT: 1 hour after receipt in laboratory
Routine: within 4 hours
Reference Values
0-18 years: ≤0.9 mcg/mL
18-150 years: ≤2.0 mcg/mL
Critical values (automatic call-back): > 2.1 mcg/mL
Interpretive Data
≥18yrs:
Therapeutic Range:
UTI: 0-1 mcg/mL
Systemic illness: 0-1 mcg/mL
Sepsis: 0-2 mcg/mL
Test Classification and CPT Coding
Test Classification:
This test has been cleared or approved by the U.S. Food and Drug Administration and is used per manufacturer’s instructions.
CPT Code:
80200
Stability
3 days Refrigerated