Successful treatment of patients with von Willebrand disease using a high-purity double-virus inactivated factor VIII/von Willebrand factor concentrate (Immunate) |
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Authors: | Auerswald Günter Eberspächer Bruno Engl Werner Güthner Christiane Koksch Marie Kreuz Wolfhart Nimtz Antje Pindur Gerhard Scheel Horst Schreiber Jörg D Siekmann Jürgen Turecek Peter L Wolf Hans-Heinrich |
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Affiliation: | Prof. Hess Kinderklinik, St.-Jürgen-Strasse 1, Bremen, Germany. |
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Abstract: | Fourteen patients with different types of von Willebrand disease (vWD) having acute bleeds or elective surgery were treated with Immunate(sound recording copyright sign), a double-virus inactivated factor VIII/von Willebrand factor (FVIII/vWF) concentrate. The concentrate was applied as a bolus or via continuous infusion. FVIII activity (FVIIIc), vWF antigen (vWF:Ag), ristocetin cofactor activity (vWF:RCo), collagen binding activity (vWF:CB), activated partial thromboplastin time (aPTT), and von Willebrand multimers (vW-multimers) were monitored for 48 hours. Pharmacokinetic analyses were performed. The clinical efficacy was rated excellent or good. Bleeding complications occurred in 3 patients due to an additional FXIII deficiency in one patient, to a surgically induced bleed in another patient, and a rather short substitution period in the third patient. There were no serious adverse experiences. One patient showed a phlebitic reaction at the site of venous access after more than 100 hours of continuous infusion, requiring a change to application via bolus. |
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