Test ID: PROTS
CPT code: 85306
LOINC: 31102-7
Specimen Type: Citrate
Frequency: Setup: Mon-Fri; TAT 1-3 days.
Instructions: Full 3.2% sodium citrate tube (Blue). If not analyzed within 4 hrs, spin 15min at 1500xg, separate plasma into 2 0.5ml aliquots, freeze at -20.
Text: Useful For: Second-order testing for diagnosis of congenital or acquired protein S deficiency for example, as an adjunct to initial testing based on results of protein S antigen assay (free protein S antigen, with or without total protein S antigen assay); Evaluating patients with a history of venous thromboembolism.
Methodology: Chromogenic