Fig. 2From: Quantitative capillary refill time predicts sepsis in patients with suspected infection in the emergency department: an observational studySchematic of quantitative capillary refill time measurements. The quantity of transmitted light obtained by a pulse oximeter equipped with a sensor for hemoglobin saturation of oxygen is related to the blood volume, based on the Lambert–Beer law. Q-CRT, quantitative capillary refill timeBack to article page