Not good. Warfarin prevents new clots but is useless against pre-existing clots. It's hard to diagnose since her brains always been jello in a blender.
Actually it is used to treat a clot. As you said it will prevent additional clotting as the body naturally dissolves the clot. This can be done on an outpatient basis. Heparin can and is used on an inpatient basis to treat an acute clot. There are numerous other anti clotting agents that can also be used.
The thing that confuses me is with the original concussion why was she not immediately hospitalized and a CAT scan of her head done. Also if she was immobilized after the original concussion she should have been on anticoagulants to prevent a clot forming.
This story stinks from beginning to end.
yep, she should be treated with Heparin, which will dissolve clots.