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Test performed at:

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Tobramycin, Pre

Test Name

Tobramycin, Pre

Red Tube with thin top Specimen type/requirements

Container Type = 1 Red Top (Adult) or 1 Red Microtainer (Pediatric)

Minimum Volume = 3mL Blood

Gold top (SST) is also acceptable specimen type

Specimen Handling

Collection Instructions: Collect 3mL of blood in red top tube for adults or 1mL in red microtainer. Gold top (SST) is also acceptable specimen type. Collect immediately before next dose. Wait until the 3rd dose before collecting samples for therapeutic monitoring. Record time of collection and time of last dose. Write your initials, date and time of sample collection on the collection label or requisition.

Laboratory Staff Instructions: Separate samples from cells as soon as possible. Repeated freezing and thawing of samples should be avoided

Rejection Criteria: Gel separator, plasma, grossly hemolyzed and icteric samples, Unlabeled or Not Sufficient Quantity samples will be rejected.

Stability: Stable for 4 h at room temperature, 1 week at 2-8°C and 1 month frozen.

Transportation: Send to Core Lab as soon as possible

Required Documentation

Turnaround Time (TAT)

1 hour for Trauma/Stat
2 hours for routine

Reference Value

For traditional (“conventional”) dosing method.

Pre-dose: < 2.0 mg/L for adults and pediatrics.

For extended interval (“once daily”) dosing method.

Pre-dose: < 1.0 mg/L for adults

Critical pre-dose: >2.0mg/L

Test Code



Competitive Binding Immunoenzymatic Assay

Testing Location


Other Information

Last Updated: June 06, 2020