Test Details
Methodology
Immunoassay
Result Turnaround Time
Within 1 day
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
Use
Monitor therapeutic drug level
Special Instructions
Peak levels should be ordered using Test No. 070327. Trough levels should be ordered using Test No. 070328. Please label tubes appropriately as “peak” and “trough.”
References
Specimen Requirements
Specimen
Serum or plasma
Volume
1 mL
Minimum Volume
0.3 mL
Container
Red-top tube, lavender-top (K2- or K3- EDTA) tube, or green-top (heparin) tube. Do not use a gel-barrier tube. The use of gel-barrier tubes is not recommended due to slow absorption of the drug by the gel. Depending on the specimen volume and storage time, the decrease in drug level due to absorption may be clinically significant.
Collection Instructions
Transfer separated serum or plasma to a plastic transport tube. Trough concentrations should be monitored. The trough sample is drawn immediately prior to the next dose.
Stability Requirements
Temperature | Period |
|---|---|
Room temperature | 3 days |
Refrigerated | 14 days |
Frozen | 14 days |
Freeze/thaw cycles | Stable x3 |
Storage Instructions
Refrigerate
Causes for Rejection
Gel-barrier tube; hemolysis; lipemia; gross bacterial contamination
LOINC® Map
| Order Code | Order Code Name | Order Loinc | Result Code | Result Code Name | UofM | Result LOINC |
|---|---|---|---|---|---|---|
| 070328 | Vancomycin Trough, Serum | 4092-3 | 070338 | Vancomycin Trough, Serum | ug/mL | 4092-3 |
| Order Code | 070328 | |||||
| Order Code Name | Vancomycin Trough, Serum | |||||
| Order Loinc | 4092-3 | |||||
| Result Code | 070338 | |||||
| Result Code Name | Vancomycin Trough, Serum | |||||
| UofM | ug/mL | |||||
| Result LOINC | 4092-3 |