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Fig. 1 —Mean segmental distention scores on supine positioning with
patient-controlled room air (RA) and automated carbon dioxide
(CO2). Lower scores represent greater distention. Mean segmental
distention was better for CO2 compared with RA in all segments, but
differences were statistically significant only for sigmoid, descending, and
transverse segments. Sigmoid segment on supine had worst mean distention score
among all segments (supine or prone) for both RA and CO2.
