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HelpTest Code Tacro Tacrolimus Level Whole Blood
Patient Preparation
No special patient preparation required
Special Collection Instructions
| Peak | Collect 1-4 hours after dose |
| Trough | collect immediately prior to dose |
Collection Method
Venous collection
Minimum Volume
- Adults: 1 mL
- Pediatric: 0.8 mL
Container
Purple (EDTA)
Preferred Specimen
Whole Blood
Acceptable Specimens
EDTA Whole Blood
Reference or Target Ranges
| Peak | 5 – 30 ng/mL |
| Trough | 5 – 15 ng/mL |
Reportable Units
ng/mL
Critical Value
Not defined for this assay
Reasons for Rejection
| Hemolysis Threshold | Not listed |
| Icterus Threshold | 60 mg/dL |
| Lipemia Threshold | 1500 mg/dL |
| Other | QNS, contaminated, improperly labeled, improper specimen type |
Specimen Stability
| Ambient | 5 days |
| Refrigerated (4°C to 8°C) | 7 days |
| Frozen(-40°C to 0°C) | 3 months |
Performance Information
| Days and Time Performed | Monday - Friday until 1:30 PM |
| Expected Turn Around Time | Stat: 1 hour upon receipt in lab Routine: 4 hours upon receipt in lab |
| Stat Availability | Yes |
| Performing Bench | WCH Chemistry |
| Methodology/Method Description | Roche Cobas – Electrochemiluminescence (ECLIA) |
Additional Information/Important Notes
Results from different types of samples and different methods are not interchangeable.
Target steady-state trough concentrations vary depending on the type of transplant, concomitant immunosuppression, clinical/institutional protocols, and time posttransplant.
CPT Codes
80197