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Normal range: 70-130%

Comment: Factor VII deficiency is inherited as an autosomal recessive bleeding disorder. It can be diagnosed fairly easily as it is the only factor deficiency that will give a prolongation of a single result in the clotting screen, i.e. the prothrombin time. Factor VII deficiency also occurs in the early stage also occurs in the early stages of Warfarin therapy and is one of the factors affected by oral anticoagulants. Liver disease will also affect the levels of Factor VII and therefore the prothrombin time

Sample:Citrated plasma, fresh