This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper Limb Traumatology, Subject name: Orthopaedics
[{'content': 'In a fracture shaft humerus which of the following complication requires immediate surgery: \nSelect and explain. \nA. Compound fracture, B. Nerve injury, C. Aery occlusion, D. Comminuted fracture', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Indications of emergency surgery in ohopaedics: Compament syndrome Vascular injury Open injury Joint dislocation/subluxation Progressive neural injury Compound/open injury: It is relatively lesser emergency as compared to vascular injury. In case of open injuries we can still wait for up to 12 to 24 hours. Nerve injury: Nerve injury in case of closed fracture of humerous is due to neuropraxia and usually function returns in about 6 months if managed conservatively. Comminuted fracture: It is not an emergent indication for surgery.', 'role': 'assistant'}]