Abstract
The influence of an intragastric balloon in the fundus on intragastric pressure changes was assessed by comparing the intragastric pressures measured by an open-tipped catheter proximal to the balloon when the balloon was inflated and when it was not. Six subjects were tested, each twice with the balloon inflated and twice with it deflated. Two significant differences were found when the balloon was inflated: 1) periods of pressure elevations were present more of the time and 2) the waveforms generated were of greater amplitude and shorter duration. The balloon thus appears to have exerted a definite but limited effect upon gastric motility. A method for analyzing the difference in waveforms is described. Both the balloon and the open-tipped catheter recorded gastric pressure elevations which frequently occurred at the same time and were of comparable magnitude. Often, however, balloon-recorded elevations occurred in the absence of catheter-recorded ones and vice versa. effects of gastric balloon; waveform analysis Submitted on September 28, 1964
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