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Factor XII assay

Injury	Disease	Nutrition	Poison

Symptoms	Surgery	Test	Special Topic

Factor XII assay

Alternative Names:

Hageman factor assay
What the risks are:

Excessive bleeding
Fainting or feeling light-headed
Hematoma (blood accumulating under the skin)
Infection (a slight risk any time the skin is broken)
Multiple punctures to locate veins

Special considerations:

Factor XII deficiency is not normally associated with clinical bleeding. In addition, factor XII does not appear to be necessary for the formation of clots for normal hemostasis (stopping of bleeding).

Veins and arteries vary in size from one patient to another and from one side of the body to the other. Obtaining a blood sample from some people may be more difficult than from others.

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