Figure 1From: Validity, intra- and inter-observer reliability of automated devices for the assessment of ankle brachial index using photo-plethysmography Illustration of ABI determination by Vicorder and Vascular Explorer. We present the default methods of both PPG-based devices. While Vascular Explorer measures during the disappearance of signal (inflation method), Vicorder measures during the re-appearance of the signal (deflation method).Back to article page