ModerateCardiovascularSuspected deep vein thrombosisuk-plab-1
A 68-year-old man presents with a swollen, painful left calf after a long-haul flight. Examination shows unilateral pitting oedema up to the knee and tenderness along the deep veins. His Wells score for deep vein thrombosis (DVT) is high. According to NICE NG158, what is the most appropriate immediate management?