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HelpTest Code LAB26 Gentamicin, Trough
Useful For
Antimicrobial drug monitoring
Methodology
Enzyme Immunoassay
Performing Laboratory
Bozeman Health Laboratory Services
Specimen Requirements
Specimen Type: Plasma or serum
Container/Tube: Light-green top (lithium heparin gel), dark-green top (sodium heparin), red top, or gold top
Specimen Volume: 1 mL
Specimen Minimum Volume: 0.5 mL
Collection Instructions:
1. Draw blood 15 minutes before next dose.
2. Spin down within 2 hours of draw and remove plasma or serum from cells.
3. Label specimen with date and time of draw.
Specimen Rejection: Hemolyzed samples may be rejected.
Additional Information: Draw time is only a recommendation. Specific circumstances related to an individual patient, eg, renal function, hepatic function, concurrent medications, signs or symptoms, and/or therapeutic response may necessitate individualization of drawing schedules.
Specimen Transport Temperature
Refrigerated
Specimen Stability
| Specimen Type | Temperature | Time |
|---|---|---|
| Plasma or Serum | Ambient | 8 hours |
| Refrigerated | 1 week | |
| Frozen | 1 month |
Reference Values
Trough therapeutic concentration: 0.5-2.0 ug/mL
Toxic concentration (automatic call-back): >2.0 ug/mL
Goal levels depend on the type of infection being treated. Goal trough levels should be less than 2.0 ug/mL for conventional dosing. Prolonged exposure to trough levels exceeding 2.0 ug/mL may lead to toxicity.
Day(s) Test Set Up
Monday through Sunday
Test Classification and CPT Coding
80170