Vancomycin Lvl, Trough (VTR)
Department: Chemistry
Test Synonym(s): LAB39, VTR, VML, Vancocin
CPT Codes: 80202
Methodology: PETINIA
Reference Range: 0 - 17 yrs: 5 - 20 mcg/mL (Supratherapeutic Trough Infant/Peds >25 mcg/mL). 18 - 150 yrs: 10 - 20 mcg/mL (Supratherapeutic Trough Adult >20 mcg/mL)
Tube Type: Dark green top (Sodium Heparin)
Specimen: Blood
Alternate Specimen: Red top (no gel)
Pediatric Requirements: 1 dark green top microtainer
Volume: 5 mL Blood
Minimum Volume: 0.5 mL Serum or plasma
Temperature: Refrigerated if not delivered to the lab immediately
Stability: Refrigerated: 2 days, Frozen at -20 C for longer storage
Reasons for Rejection: Hemolysis, low volume, SST tube
Days Performed: Daily
Times Performed: Continuous
TAT: STAT: 1 hour; Routine: 2 hours
Significance: Trough serum levels generally - draw 30 minutes before next dose, following third dose. Provide date/time last dose charted, collection date/time, dosage amount/interval
Search Help
Search Options for the Test Directory:
1. Enter the test name in the Keyword search field.
Hint: You can also enter any part of the test name to expand the search.
(Example: you can type "west" or "sed" or "rate" to find Westergren Sedimentation Rate)
2. Enter the Vanderbilt Test Code, if known.
3. Choose one of the letter boxes to display a list of all test names and keywords starting with that letter.
If you are unable to find a test in our directory, please contact VPLS at
1-800-551-5227 or e-mail emily.k.thompson@vumc.org.