Von Willebrand's Disease, Canine - contd.
The easiest test for inappropriate bleeding due to von Willebrand's disease is called the oral mucosal bleeding test. This is performed by making a standardized incision on the inside of the lip. This test is not specific for von Willebrand's disease since other conditions can cause prolonged mucosal bleeding times.
The most commonly used test that is more specific for the diagnosis is the measurement of von Willebrand's factor antigen on a plasma sample. Other diseases can cause this result to be artificially increased, however.