This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vascular surgery, Subject name: Surgery
[{'content': 'Maximum tourniquet time for upper limb is \nSelect and explain. \nA. 1/2 hour, B. 1 hour, C. 1.5 hours, D. 2 hours', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Excessive tourniquet time causes both local pressure and distal ischaemic effects, with nerve damage and even compament syndrome Torniquets should usually be let down after 1 hour unless close to the end of a procedure They can be reinflated after 5-10 min for a fuher hour Torniquets time for upperlimb : 1 hour Maximum tourniquet time for upper limb: 2 hours Ref: Bailey and love 25th edition Pgno : 206-207', 'role': 'assistant'}]