TOBRAMYCIN TROUGH, SERUM - NorDx Test Catalog

Performing Laboratory

NorDx Laboratories

Useful For

Monitoring adequate clearance of tobramycin near the end of a dosing cycle

Method Name

Spectrophotometry (SP)

Reference Values

Therapeutic concentration: ≤2.0 ug/mL

Toxic concentration: >2.0 ug/mL

Days and Times Test Performed

Monday through Sunday

Report Available

1 Day

Specimen Type

Submit one of the following:

~ Plasma

~ Serum

Preferred Container

Plasma Separator Tube (PST)

Serum Separator Tube (SST)

Preferred Volume

Plasma: 1 mL (Plasma Separator Tube (PST))

Serum: 1 mL (Serum Separator Tube (SST))

Minimum Volume

Plasma: 0.5 mL (Plasma Separator Tube (PST))

Serum: 0.5 mL (Serum Separator Tube (SST))

Specimen Collection and Handling

1. Draw specimen 30 minutes prior to next scheduled dose.

2. Spin specimen, separate from clot and send frozen.

3. Specimens containing additional antibiotics should be stored frozen if any delay in analysis or more than 4 hours in transport time is anticipated.

Failure to freeze specimen containing additional antibiotics may result in falsely low tobramycin levels due to in vitro inactivation.

Specimen Stability Information

Specimen Type: Plasma

Frozen: 1 Months

Refrigerated: 3 Days

Must be spun/separated within: 2 Hours

Note: Freeze at -20 C for long term storage.

Specimen Type: Serum

Frozen: 1 Months

Refrigerated: 3 Days

Must be spun/separated within: 2 Hours

Note: Freeze at -20 C for long term storage.

Add On Capable

Yes

Advance Beneficiary Notice Requirements

No ABN Required

CPT Code Information

CPT Code	CPT Description	CPT Disclaimer
80200	Drug Screen Quantitative Tobramycin

Performing Laboratory Location