Capillary Refill Time Calculated With a Video-assisted Method Has a Better Reproducibility Than Visual Method in Critically Ill Patients

In the shortest time possible (less than 3 minutes), realization of three successive measurements of the time of cutaneous recoloration by a pressure by the so-called visual method by two intensivists trained at the CRT of the surgical resuscitation service familiar with the technique of time of cutaneous recoloration. The measurements will be carried out blindly from each other.

"Compression of the nail bed of the index of the subject studied until whitening of the pressed area, then release, the force will be equivalent to 300 g on a kitchen scale TPA 808S Techwood™ and time of compressions being of 5 seconds. Smartphone camera recording of the procedure (Iphone 7™, Apple Inc., Cupertino, CA). An assistant is in charge of timing the TRC between two tops given by the operator, the tops corresponding to the release of the pressure on the index so the beginning of the TRC and the total recoloration of the bleached area. This wizard records the three results in seconds with the associated tenth of a second."