DiCART TM Device for Capillary Refill Time Measurement

"Each time, capillary refill time will be evaluated three times consecutively by clinical method applying a firm pressure with the finger during 15s, then brutally releasing it, and estimating time of skin recoloration with a chronometer and by DiCART TM device~Three vascular occlusion tests will be successively performed with a cuff during less than 10 minutes:~* Arterial vascular occlusion test (50mmHg above systolic arterial pressure of the healthy volunteers),~* Veinous vascular occlusion test (30mmHg),~* Control test without vascular occlusion test. Capillary refill time measurements will be repeated just before, during and just after vascular occlusion tests.~Randomization determine the order of the vascular occlusion tests. Investigators performing capillary refill time evaluation will be blinded from it. Vascular occlusion tests will be alternatively performed by one and the other limb. The whole protocol will be performed at the upper and then at the lower limb."