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Test Code GNPPS Gentamicin, Peak, Plasma


Specimen Required


Patient Preparation: A peak specimen is collected 30 minutes after the completion of an IV infusion or 1 hour after an intramuscular dose.

Collection Container/Tube:

Preferred: Light-green top (lithium heparin plasma gel)

Acceptable: Green top (lithium heparin)

Submission Container/Tube: Plastic vial

Specimen Volume: 0.5 mL

Collection Instructions:

1. Gel tubes should be centrifuged within 2 hours of collection.

2. Green-top tubes should be centrifuged, and the plasma aliquoted into a plastic vial within 2 hours of collection.


Useful For

Monitoring adequacy of drug clearance during gentamicin therapy by assessing the peak drug level after dose administered

Method Name

Turbidimetric Immunoassay

Reporting Name

Gentamicin, Peak, P

Specimen Type

Plasma Li Heparin

Specimen Minimum Volume

0.25 mL

Specimen Stability Information

Specimen Type Temperature Time
Plasma Li Heparin Refrigerated (preferred) 7 days
  Frozen  28 days

Reject Due To

Gross hemolysis Reject

Reference Values

Peak: 3.0-12.0 mcg/mL

Toxic peak: >12.0 mcg/mL

Day(s) Performed

Monday through Sunday

Report Available

Same day/1 to 2 days

Performing Laboratory

MCHS- Mankato

Test Classification

This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

CPT Code Information

80170

LOINC Code Information

Test ID Test Order Name Order LOINC Value
GNPPS Gentamicin, Peak, P 3663-2

 

Result ID Test Result Name Result LOINC Value
GNPPS Gentamicin, Peak, P 3663-2