Archives of disease in childhood
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Review
Validity and reliability of measurement of capillary refill time in children: a systematic review.
Most guidelines recommend the use of capillary refill time (CRT) as part of the routine assessment of unwell children, but there is little consensus on the optimum method of measurement and cut-off time. ⋯ We recommend use of the following standardised CRT method of measurement: press on the finger for 5 s using moderate pressure at an ambient temperature of 20°C-25°C. A capillary refill time of 3 s or more should be considered abnormal.