This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
[{'content': 'The ideal treatment for hemothorax greater than 500 ml/hour - \nSelect and explain. \nA. Wait and watch, B. Needle aspiration, C. Intercostal tube, D. Open thoracotomy with ligation of vessels', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Following are indications of thoracotomy in blunt chest trauma:\n\nInitial drainage of blood > 1000 ml, especially if fresh.\nContinued brisk bleeding > (100 ml/15 minutes) from the intercostal drain\nContinued bleeding of > 200 ml/hr for > 3 hrs\nRupture of bronchus, aorta, esophagus or diaphragm\nCardiac tamponade (if needle aspiration unsuccessful).', 'role': 'assistant'}]