Fig. 1
From: Visceral pressure stimulator for exploring hollow organ pain: a pilot study
Photo montage of VPS and GUI for VPS control. a Photos showing front, rear, and inside of VPS device (with individual parts labeled). b Screen shot of GUI for VPS control. Controls allow the user to set the pre-trial interval (set to 20 s in example), the length of an actual pressure trial (set to 20 s in example), the length of the intertrial interval (set to 60 s in example), and the number of trials to be run (“loops”)