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Tobramycin, Peak

Tube Type = Dark Blue Top or Red Bullet

Tube Type

Test ID LAB36
EPIC Order
 TOBRAMYCIN LEVEL, PEAK
CPT Code(s) 80200
Group/Individual Test Individual
Laboratory Core Laboratory
Tube Station Routine: 30; STAT: 888
Specimen Routine: 2 mL blood/navy blue plain tube/red plain tube also acceptable; See Comments 
Micro: 300 µL blood/red plain Pediatric Bullet; See Comments 
Stability
Unspun: 2 hours
Spun/separated, Room Temperature: 8 hours
Spun/separated, Refrigerator: 2 days
Spun/separated, Frozen: 30 days
Availability 24 hrs/day
Turnaround Time STAT: 1 hr; Routine: 2 hrs
Reference Range

Therapeutic:

Critical:

4.0-10.0 µg/mL (Peak)

>12.0 µg/mL (Peak)
Comments
  • Collection for Tobramycin-Peak samples:
    • IV infusion: 30-60 min after completion
    • IM injection: 60-90 min post dosing
  • Collect sample before administering B-lactam antibiotics, otherwise levels may be lower than expected.
  • Red Top Tubes must NOT contain Serum Separator Gel

Reviewed by J. Carr on January 09, 2026

UNC Hospitals
McLendon Clinical Laboratories
101 Manning Drive
Chapel Hill, NC 27514