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HelpTest Code Gent Gentamicin Level
Patient Preparation
No special patient preparation required
Special Collection Instructions
| Peak | Collect 30 minutes after dose |
| Trough | Collect immediately prior to dosing |
Collection Method
Venous collection
Minimum Volume
- Adults: 1 mL
- Pediatric: 0.6 mL
Container
Lt Green / Plasma Separator / Lithium Heparin
Preferred Specimen
Light Green Top (lithium heparin) plasma
Acceptable Specimens
Serum:
- Gold Top SST
- Red Top
Plasma:
- Light Geen Top (lithium heparin)
- Purple or Pink top (K2/K3 EDTA)
- Dark Green Top (sodium heparin)
Reference or Target Ranges
| Peak | 3 – 12 ug/mL |
| Trough | 0 – 2 ug/mL |
Reportable Units
ug/mL
Critical Value
| Peak | ≥20 ug/mL |
| Trough | ≥2 ug/mL |
Reasons for Rejection
| Hemolysis Threshold | 2000 mg/dL |
| Icterus Threshold | 20 mg/dL |
| Lipemia Threshold | 1691 mg/dL |
| Other | QNS, contaminated, improperly Labeled, improper specimen type |
Specimen Stability
| Ambient | 2 hours |
| Refrigerated (4°C to 8°C) | 1 week |
| Frozen(-40°C to 0°C) | 2 weeks |
Performance Information
| Days and Time Performed | 24/7 |
| Expected Turn Around Time | Stat: 1 hour Routine: 4 hours |
| Stat Availability | Yes |
| Performing Bench | WH Chemistry |
| Methodology/Method Description | Roche Cobas – Competition assay |
Additional Information/Important Notes
| Conditional Dosing | |
|---|---|
| Gram positive synergy | Adults: within 30 min before 3rd or 4th dose Pediatrics: at 3rd dose |
| Pediatric CF extended interval dosing | 30 min before 2nd dose |
| ICN extended interval dosing | within 30 min before 4th dose |
| ICN extended interval dosing (HIE or significant asphyxia) | within 20 min before 3rd dose |
CPT Codes
80170