“Exemplifying the use of this new technique, simultaneous administration of lactulose into the stomach and SASP into the duodenum yielded consistently longer stomach-to-cecum than duodenum-to-cecum transits, attributable to the delay caused by gastric emptying.”
“When a mixture of SASP and lactulose was taken by mouth, times of the respective "signals" varied among individuals from 40 to 180 min (n = 8) but were correlated within individuals.”