ModerateHaematologySuspected deep vein thrombosisuk-plab-1
A 64-year-old man is admitted with a painful swollen left calf after a long-haul flight. His Wells score for deep vein thrombosis (DVT) is 3 (DVT likely). Ultrasound Doppler cannot be performed until the next morning. He has no contraindications to anticoagulation. What is the most appropriate immediate management?