Stanford Hospital & Clinics and Lucile Packard Children’s Hospital
RESULT
Test Name : Von Willebrand Disease Screen Order Code : VWSCN
Note: Test performed by Special Coagulation Lab
Synonyms: Von Willebrand Disease Screen
Specimen Type: Plasma
Container Type: Light-blue-top tube (3.2 % Sodium Citrate)
Required Volume: 10 mL (2 Blue-top tubes of 5 mL each)
Minimum Volume (Pediatric): 2 mL plasma
Methodology: Automated Latex Enhanced Immunoassay (VWACT); Automated Latex Immunoassay (VWAG); Clot Detection (FACT8)
Components: Von Willebrand Factor Activity (VWACT), Von Willebrand Antigen (VWAG), Factor VIII (FACT8)
Standard Run Times: Daily
Turnaround Time: 24 hours/next day
Special Handling: Within 1 hour of collection, centrifuge tube as required to obtain platelet-poor plasma. Aliquot platelet-poor plasma into plastic tubes (minimum 2 aliquots). Freeze immediately. Transport Frozen.
CPT Codes: 85245 (VWACT), 85246 (VWAG), 85240 (FACT8)
LPCH EPIC Code: LAB331
SHC EPIC Code: LABVWSCN
Causes For Rejection: Clotted, gross hemolysis, improperly filled tube, received thawed.
Department: Coagulation