Fig. 1From: Bedside breath tests in children with abdominal pain: a prospective pilot feasibility studyExample of a single VOC signature with 12 sensors. The time captured includes three phases: a a small warm-up phase (0–2 s), b the sensor readings as the sample is passed through the device (2–13 s) and c a post-sample phase consisting of noise in the sensors whilst the device is reset (17–30 s)Back to article page