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 Hematology

When certain coagulation factors are too low or missing, the chain reaction does not take place normally. In this disorder, bleeding ranges from mild to severe.

A congenital factor II deficiency is a very rare disorder that runs in families (inherited). It results in poor blood clotting. Both parents must be carriers to pass it to their children. A family history of a bleeding disorder is a risk factor.

Acquired factor II deficiency is common and results from a lack (deficiency) of vitamin K, severe liver disease, and use of drugs that prevent clotting (anticoagulants). Risk factors for vitamin K deficiency are long-term use of antibiotics, bile duct obstruction, and poor absorption of nutrients from the intestinal tract (intestinal malabsorption). Some newborns are born with vitamin K deficiency.

Causes, incidence, and risk factors:
When you bleed, the body launches a series of activities that help the blood clot. This is called the coagulation cascade. The process involves special proteins called coagulation factors. (Factor II is a coagulation factor.) Each factor's reaction triggers the next reaction. The final product of the coagulation cascade is the blood clot.	Blood clotting