, plural h(a)emarthroses
) is a bleeding
It usually follows injury
but occurs mainly in patients with a predisposition to hemorrhage
such as those being treated with warfarin
(or other anticoagulants
) and patients suffering from hemophilia
It can be associated with knee joint arthroplasty.
In hemophilia it may occur spontaneously, and recurrent hemarthroses are a major cause of disability
in that patient group due to hemophilic arthropathy
, requiring synovectomy
, joint replacement
and increased medical therapy to prevent further bleeding episodes, although it is controversial whether clotting factor administration adequately prevents hemarthroses.