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Vanderbilt Pathology Laboratory Services

Test Directory



GENTAMICIN LEVEL (GML)

Department: Toxicology
Test Synonym(s): GML, Garamycin
CPT Codes: 80170
Methodology: FPIA
Reference Range: Infant Peak: 2-4 mg/Kg = 5-10 mcg/mL - 5-7 mg/Kg = >15mcg/mL Peak Adult: 5-10 , Trough Infant/Ped's: <2 , Trough Adult: <0.5 , Toxic Trough Ped's: Q24>1 - Q8/Q12 >2 , Toxic Trough Infant: Q24 >2 - Q8/Q12 >2 , Toxic Trough Adult: Q24 > 0.5 - Q8/Q12 >2
Tube Type: Dark green top (Sodium Heparin)
Specimen: Blood
Alternate Specimen: Red top (no gel)
Pediatric Requirements: 1 dark green microtainer
Volume: 2 mL
Minimum Volume: 0.25 mL
Temperature: Refrigerated if not delivered to the lab immediately
Stability: Refrigerated: 2 days, Frozen at -20 C for longer storage
Reasons for Rejection: Gross hemolysis
Days Performed: Daily
Times Performed: Continuous
TAT: Stat: 1 hour, routine: 2 hours
Special Instructions: Indicate if peak or trough specimen. Peak serum levels generally - draw 20 minutes after 30 min IV - Submit date/time IV start, date/time IV stop, peak collection date/time, dosage amount/interval. Trough serum levels generally - draw 0-30 minutes before next dose, following third dose. *Date/time last dose charted. Collection date/time. Provide dosage amount/interval.





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