A 45-year-old female presents to her primary care physician…
A 45-year-old female presents to her primary care physician with complaints of pain and swelling in her left leg. She reports that the symptoms started a few days ago and have been progressively worsening. She denies any recent trauma or injury to the area. She has a past medical history significant for obesity and oral contraceptive use. On physical examination, there is unilateral calf swelling with tenderness and erythema. The patient’s vital signs are within normal limits.Which diagnostic test is considered the gold standard for diagnosing deep vein thrombosis (DVT)?