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Voriconazole, Serum (NY)
Test Code13234
CPT Codes
80285<br><strong>For Non-New York patient testing, use test code 94096</strong>
Preferred Specimen
2 mL serum collected in a red top tube (no gel)
Minimum Volume
0.6 mL
Instructions
Centrifuge and aliquot serum into a plastic vial within 2 hours of collection
Transport Temperature
Refrigerated (cold packs)
Specimen Stability
Room temperature: 28 days
Refrigerated: 28 days
Frozen: 28 days
Refrigerated: 28 days
Frozen: 28 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis • Grossly lipemic • Gross icterus • Serum gel/SST
Methodology
Liquid Chromatography Tandem Mass Spectrometry (LC/MS/MS)
FDA Status
This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.
Setup Schedule
Sets up 7 days a week.
Clinical Significance
Monitoring trough levels of voriconazole is suggested for:
-Individuals with reduced liver function
-Individuals with cytochrome P450 (CYP) 2C19 alterations associated with poor metabolic function
-Patients taking other medications that affect CYP2C19 activity
-Patients experiencing potential toxicity
Monitoring trough levels may be reasonable in patients who are not responding optimally or have drug interactions that may decrease voriconazole levels or to ensure adequate oral absorption
-Individuals with reduced liver function
-Individuals with cytochrome P450 (CYP) 2C19 alterations associated with poor metabolic function
-Patients taking other medications that affect CYP2C19 activity
-Patients experiencing potential toxicity
Monitoring trough levels may be reasonable in patients who are not responding optimally or have drug interactions that may decrease voriconazole levels or to ensure adequate oral absorption