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Tobramycin

Source Blood
Mnemonic Pre-dose:   TOB1
Post-dose: TOB2
Random:     TOBR
Specimen Requirements

1 x 3 mL light green (mint) top PST tube.  Gold top SST tube also acceptable.

0.2 mL plasma or serum

Minimum Whole Blood Volumes for Microcollections

Two specimens required - one trough and one peak.
Specimens MUST be marked accordingly.

- Trough (pre-dose): Collect 0-30 minutes prior to next dose.
- Peak (post-dose): Collect 30 minutes after IV infusion or 1-2 hours after IM injection.
- Random: Collection time for once daily dosing regime is 6-14 hours after dose started (usually 8 hours)

Record time of last dose on requisition.

Specimen Handling
Additional Information List any other antibiotics patient is receiving.

For additional information, see Half-life and Time to Steady State.

Testing Location Chemistry-FMC
Testing Frequency Daily
Alternate Name(s)
Reference Interval

Pre-dose

0.0-1.9 mg/L

Post-dose

5.0-10.0 mg/L


Click here for critical values.