Sign in →

Test Code GENTA Gentamicin, Serum

Useful For

Gentamicin is frequently used (often in combination with penicillin or a cephalosporin) for the treatment of serious infections, particularly those due to Pseudomonas aeruginosa, Enterobacter, Klebsiella, Serratia, Citrobacter, Staphylococcus, and other species.

Synonyms/Keywords

Garamycin, U-Gentian

Specimen Requirements

Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)		 Pediatric Minimum Volume
(no repeat)
No Serum Serum Separator Tube (SST) Red Top Tube (RTT) 0.5 mL 0.2 mL 0.6 mL whole blood

Collection/Processing Instructions

Transport to lab on wet ice.

Serum should be removed from cells within 60 minutes. 

Indicate exact draw time on tube.  

 

Trough: draw specimen just prior to next dose.
Peak(IV): draw 30-60 min. after end of 30-minute infusion, or draw 15 min. after a 60-minute infusion.
Peak(IM): draw 30-60 min. after dosing.

Specimen Stability Information

Specimen Type Temperature Time
Serum Refrigerate 2 hours
Frozen 1 year

Reference Range Information

Performing Location Reference Range
All Performing Sites Therapeutic (Peak): 4.0-10.0 ug/mL
Safe level at Trough: <2.0 ug/mL
Subtherapeutic (Peak): <4.0 ug/mL
See Critical Value List for list of current critical values

Marshfield Labs Performing Department

Marshfield Labs Chemistry

Performing Information

Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
 
Marshfield Monday through Sunday Less than 2 hours Emit* 2000 Rate Assay/Beckman AU

 

CPT Codes

CPT Modifier
(if needed)		 Quantity Description Comments
80170        

Outreach CPT Codes

CPT Modifier
(if needed)		 Quantity Description Comments
80170        

Ordering Applications

Ordering Application Description
Cerner Gentamicin Level