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': 'In cholecystectomy, fresh frozen plasma should be given - \nSelect and explain. \nA. Just before operation, B. At the time of operation, C. 6 hours before operation, D. 12 hours after operation', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The question is incomplete. It should be “A cirrhotic patient with abnormal coagulation needs cholecystectomy, FFP should be given:”\n• Transfusions with FFP are given to replenish clotting factors.\n• The effectiveness of the transfusion in maintaining hemostasis is dependent on the quantity of each factor delivered and its half-life.\n• The half-life on the most stable clotting factor, factor VII, is 4 to 6 hours.\n• A reasonable transfusion scheme would be to give FFP on call to the operating room.\n• This way the transfusion is complete prior to the incision, with circulating factors to cover the operative and immediate postoperative period.', 'role': 'assistant'}]