Home
HelpTest ID TACPK Tacrolimus, Peak, Blood
Secondary ID
88157Useful For
Assessment of postdosing (peak) blood tacrolimus concentrations
Specimen Type
Whole Blood EDTAOrdering Guidance
This test is for specimens collected during a peak period. For specimens collected at trough, order TAKRO / Tacrolimus, Blood.
Necessary Information
Date of last dose, time of last dose, and dosage information are required.
Specimen Required
Container/Tube: Lavender top (EDTA)
Specimen Volume: 3 mL
Collection Instructions:
1. Do not centrifuge.
2. Send whole blood specimen in original tube. Do not aliquot.
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Whole Blood EDTA | Refrigerated (preferred) | 14 days |
| Ambient | 14 days | |
| Frozen | 14 days |
Reject Due To
| Gross hemolysis | OK |
| Gros lipemia | OK |
| Gross icterus | OK |
| Clotted specimen | Reject |
Reference Values
5.0-30.0 ng/mL
Target steady-state trough concentrations vary depending on the type of transplant, concomitant immunosuppression, clinical/institutional protocols, and time posttransplant. Results should be interpreted in conjunction with this clinical information and any physical signs or symptoms of rejection or toxicity.
Day(s) Performed
Monday through Sunday
Report Available
Same day/1 to 2 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
80197
Forms
If not ordering electronically, complete, print, and send a Therapeutics Test Request (T831) with the specimen.