- Page navigation anchor for Capillary refill time in sick children: a clinical guide for general practiceCapillary refill time in sick children: a clinical guide for general practiceHas CRT ever been "validated"? I believe it was an "arbitrary" figure that came out of a meeting of medical staff. Where CRT was being discussed and the question was asked "what is normal CRT" an individual checked theirs on the dorsum of their hand and found it to be 2 seconds! However in the context of an unwell child it should always be measured centrally either over sternum/upper chest or forehead if child supine.Competing Interests: None declared.