When frozen plasma is allowed to thaw slowly at 4 °C, a proportion of the plasma protein remains undissolved in the cold thawed plasma and stays in this state until the plasma is warmed. It is this cold, insoluble precipitate that is known as cryoprecipitate. It can be recovered quite easily by centrifuging. Its value is that it is a rich source of factor VIII, which is used in the treatment of HAEMOPHILIA.
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