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VWPRO
VON WILLEBRAND PROFILE + PLATELET AGGREGATION STUDIES

Test Code VWPRO 
Test VON WILLEBRAND PROFILE + PLATELET AGGREGATION STUDIES 
Description Factor VIII Assay
Von Willebrand Factor Multimeric Analysis, if indicated
Platelet Aggregation With Ristocetin
Von Willebrand Factor (Ristocetin CoFactor Assay)
Von Willebrand Factor Antigen
(Tests may be ordered individually.)

Useful for diagnosis of von Willebrand disease. 

Specimen CALL THE COAGULATION DEPARTMENT
AT (207) 662-2959 TO SCHEDULE TEST. COAGULATION TECHNOLOGISTS WILL COLLECT THE SPECIMEN. TESTING MUST BE PERFORMED IMMEDIATELY UPON COLLECTION.

NOTE: Testing cannot be performed on the following:
1. Patients on heparin therapy, or antiplatelet drugs.
2. Patients with thrombocytopenia (< 100,000). 

Reference Values An interpretive report will be issued. 
Analytic Time 14 - 21 Days 
Day(s) Test Set Up Tuesday,Wednesday,and Thursday (8:30 - 10:30 by appointment only) 
CPT Code(s) 85002  Template bleeding time, if indicated
85240  Factor VIII assay
85245  Ristocetin cofactor assay
85246  von Willebrand factor antigen
85247  Multimeric analysis, if indicated
85576 x 5  Platelet aggregation with Ristocetin

Special Instructions