Jed Ortmeyer, a 31-year-old San Jose Sharks forward, has a disorder that makes his blood prone to clotting. He must administer daily injections of an anticoagulant, which helps the problem but increases his chances of serious internal and external bleeding. ?His risk of having something happen is real,? said Dr. Nicholas J. Morrissey, a vascular surgeon at NewYork-Presbyterian Hospital/Columbia University Medical Center, who has not treated Ortmeyer. ?Because things that to you and I that are not a bother can be bothersome to someone who is on blood thinners.?