Bleeding time

What the risks are:

There is a very slight risk of infection (because the skin is broken). Excessive bleeding is rare.

Special considerations:

The bleeding time test is used to evaluate the vascular (blood vessel) and platelet factors associated with hemostasis (blood clot formation). When vascular injury occurs, the first hemostatic response is a spastic contraction of the lacerated vessels. Next, platelets adhere to the wall of the vessel at the area of laceration in an attempt to plug the hole. The failure of either process results in a prolonged bleeding time.