DDAVP effect on factor XII activity levels

Evaluation of the extent of response on factor XII and factor XI, and factor VIII coagulant activity, von Willebrand factor antigen and ristocetin cofactor after desamino-8-D-arginine vasopressin stimulation. Coagulation studies were performed on normals, thrombophilic patients and on a group of subjects affected by congenital factor XII and factor XI deficiencies