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Test Code LAB4096 GENTAMICIN LEVEL, TROUGH

Specimen Type

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

 

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, µg/mL

Trough 0.5 - 2.0

Toxic: >2.0

Reporting Limit

0.5 - 20.0 ug/mL

CPT Codes

80170

Test Components

Gentamicin, Trough, µg/mL

Collection Instructions

Draw trough specimen within 1 hour prior to next dose. Note time of dose and drawing.

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.

Specimen Processing

Remove the plasma or serum from the cells, clot or gel as soon as possible before storing.