A female patient is taking warfarin ( Coumadin) after open heart surgery. The patient tells the home care nurse she has pain in both knees that began this week. The nurse notes bruises on both knees. Based on the effects of her medications and the report of pain, what does the nurse suspect is the cause of the pain?
Select all that apply: Anticoagulants prevent formation of a thrombus. Anticoagulants prevent extension of a thrombus. A patient who has been treated with warfarin (Coumadin) after open heart surgery is involved in a car accident and has a laceration on her head.