The Factor VIII test measures the level of Factor VIII, a protein essential for blood clotting. Deficiency or dysfunction of Factor VIII can lead to bleeding disorders, most notably Hemophilia A.

Indications for Testing: Patients with unexplained bleeding, family history of bleeding disorders, or abnormal results in other coagulation tests.

Associated Risks:

• • Minimal risk when drawing blood, such as bruising or infection.
  • Patients with bleeding disorders may be at risk for excessive bleeding during and after the procedure.

Normal Factor VIII levels generally range from 50% to 150% of the normal reference range.

Values can vary based on the laboratory, and age, and can be influenced by other factors like pregnancy or certain medications.

Low Factor VIII Levels: Suggestive of Hemophilia A or other bleeding disorders.

Normal Levels: May rule out Factor VIII deficiency but does not exclude other clotting factor deficiencies or disorders.

High Levels: May be seen in conditions like inflammation, pregnancy, or certain malignancies.

Sample Required: Blood sample, typically collected in a citrated tube (commonly blue-top tube).

Preparation: The patient may need to fast or avoid certain medications before the test, as directed by their healthcare provider.