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Test Code LAB4094 GENTAMICIN LEVEL, PEAK

Specimen Type

Preferred Sample: Lithium Heparin Plasma (Mint Green Top, Dark Green Top)
Alternative Sample: Serum (SST, Gold, Corvac, Tiger, Red Top Tube)

Collection Instructions

Draw peak specimen 1 hour after IM dose or 1/2 hour after IV infusion completed. Note time of dose and drawing.

Specimen Volume

1 mL

Minimum Volume

0.5 mL

Turnaround Time

STAT: 1 hour
Routine: 4 hours

Test Schedule

Daily

Sample Stability

Refrigerated: 7 days
Frozen: 14 days

Method

Colorimetric

Reference Ranges

Gentamicin,

              Peak 5.0-10.0 µg/mL 

              Toxic: >12.0 ug/mL

Test Components

Gentamicin, Peak, µg/mL

CPT Codes

80170

Test Limitations

Studies have shown that therapeutic drug levels may be altered in serum/plasma that remains in contact with separator gel. Therapeutic drug levels collected in an SST or PST should be run within 24 hrs of collection.