Preparation of pooled cryoprecipitate for treatment of hemophilia A in a home care program

Setting the scene: Historical overview of challenges and what led to advances in comprehensive care in developed countries, the Canadian experience

The history of the development of comprehensive care for hemophilia and other inherited bleeding disorders in Canada has been long and full of challenges. From limited in-patient treatment with plasma and cryoprecipitate in a few major centres in the 1950s and 1960s, a network of Hemophilia Treatment Centres (HTCs) offering multi-disciplinary comprehensive care, home infusion and prophylaxis was established across the country by the late 1970s and early 1980s, only to be shaken by the widespread contamination of factor concentrates with HIV and HCV in the 1970s and 1980s. In recent years the mission of HTCs has expanded to better serve people with von Willebrand disease, rare factor deficiencies and other rare bleeding disorders, and more fully recognize the needs of women with bleeding disorders. In 2020, challenges remain, notably maintaining the resources and expertise in HTCs and gaining access to the latest innovations in treatments.

Influence of heat treatment on FVIII:C recovery from freeze dried cryoprecipitate

A standard lyophilised triple cryoprecipitate preparation, stabilised by the addition of Synthamin 17, was heat treated at 60 degrees C for 48 hours. The total protein content, factor VIII concentration, and factor VIII recovery were not affected by the heat treatment procedure. Heat treatment did not influence the reconstitution characteristics of the freeze dried preparation and there were no side effects during or after administration. The mean in vivo rise of factor VIII from infused heat treated triple cryoprecipitate was 2.5 (SD 0.9)%/unit/kg with a half life of 13.1 (3.1) hours. These results compare favourably with those obtained using non-heated triple cryoprecipitate. Cryoprecipitate can be heat treated without adversely influencing factor VIII recovery, and the ability to prepare a heat treated cryoprecipitate means that a small pool high yield factor VIII preparation can again be used in routine clinical practice.