Tobramycin, trough

Alphabetical Test listing

Tobramycin, trough-829

Test name:

Tobramycin, trough

Test number:

829

Excellian order number:

80200.3

Abbreviation:

TBT

Alternate names:

Nebcin

Useful for:

Amikacin cross‑reacts with this assay.
Kanamycin cross-reacts significantly; however, the assay has not been optimized to quantitate this aminoglycoside

Specimen type:

Lithium heparin (Li hep) plasma

Collection container:

Lt green plasma separator (PST)

Volume:

1.0 mL

Minimum volume:

0.4 mL

Collection instructions:

Draw 30 minutes before next dose
Do not collect from a line
Immediately following collection, mix by inverting 8 - 10 times to prevent clotting

Processing instructions:

Spin within two (2) hours of sample collection

Transport container:

Lt green plasma separator (PST)

Alternate specimen type:

Serum
Sodium heparin (Na hep) plasma

Alternate collection container:

Gold serum separator (SST) tube

Alternate collection instructions:

Immediatley following collection, mix sample by gently inverting 5 times

Alternate processing instructions:

Allow sample to clot for a minimum of 30 minutes
Spin within two (2) hours of sample collection

Alternate transport container:

Gold serum separator (SST) tube

Required forms/information:

Date and time of last dose

Transport and stability:

Refrigerated (preferrred) - 3 days

Frozen - 1 month

Reason for rejection:

Improper labels (unlabeled or mislabeled)
Hemolysis (some procedures)
Improper anticoagulant or ratio
Delay in transport
Improper storage temperature affecting results
Inappropriate timing of collection
Improper container
Leaking container resulting in compromised specimen
Quantity not sufficient (QNS)

Performing lab:

AHL - Chemistry: C

Days set up:

Daily

TAT:

1 day

Method:

Homogeneous enzyme immunoassay

Reference ranges:

Therapeutic: ≤ 1.5 µg/mL

Results that require action (critical):

> 1.5 µg/mL

CPT codes:

80200

Date created:

11/30/2001

Revised date:

12/31/2022

Review date:

01/12/2024