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: Pediatrics
[{'content': 'Capillary refill time in a child with shock is? \nSelect and explain. \nA. >1 second, B. >2 seconds, C. >3 seconds, D. >4 seconds', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Capillary refill is a simple test that assesses how quickly blood returns to the skin after pressure is applied.\nIt is carried out by applying pressure to the pink part of the nail bed of the thumb or big toe in a child and over the sternum or forehead in a young infant for 3 seconds.\nThe capillary refill time is the time from release of pressure to complete return of the pink colour. It should be less than 3 seconds.\nIf it is more than 3 seconds the child may be in shock. Lift the limb slightly above heart level to assess arteriolar capillary refill and not venous stasis.\nThis sign is reliable except when the room temperature is low, as the cold environment can cause a delayed capillary refill.\nIn such a situation check the pulses and decide about shock', 'role': 'assistant'}]