Test Directory

Test Code
POSAQ
Test Name
Posaconazole, Quantitative by LC-MS/MS
CPT Codes
80187
Expected Turnaround Time
2 - 7 days
Clinical Utility

Prophylaxis of invasive Aspergillus and Candida infections in severely immunocompromized patients and treatments of oropharyngeal candidiasis.

Specimen and Container Info

Preferred Specimen Type: Serum

Alternate Specimen Type: Plasma

Preferred Collection Container: Red Top, Plain

Alternate Collection Container: Lavender Top (EDTA)

Desired Specimen Volume: 1 mL

Collection Instructions
  1. Collect a red top, plain tube via venipuncture
Processing and Submission Instructions
  1. Separate serum from cells.
  2. Transfer 1 mL of serum to a clear aliquot tube (screw cap).
Patient Preparation

.

Transport Instructions

Transport to the laboratory refrigerated. 

Stability Requirements

Room Temperature

14 days

Refrigerated

14 days

Frozen

14 days

Causes for Rejection
  • Gel barrier tube
Methodology
Liquid Chromatography - Tandem Mass Spectrometry (LC-MS/MS)
Reference Intervals

 See patient report.

Limitations

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 times, the decrease in drug level due to absorption may be clinically significant.

Alternate Names
  • Noxafil®
Reference Lab
Labcorp Of America Holdings
Testing Schedule
Monday-Friday