A 28 year old woman has painful and swollen right leg. she said that her symptoms began 2 days ago. as she was getting of a plane after a 13 hour fight from overseas. Her symptoms have increased gradually since that time. she denies left leg complaints. shortness of breath,or chest pain
History: past medical history is insignificant and the patient's only regular medication is oral contraceptive pills. The patient smoker 1 pack of cigarettes per day