Canine gastric emptying of solids and liquids

digestible solid (50 g of liver tagged with [57Co]-cyanocobalamine and diced into l-cm cubes), an indigestible solid (40 radiopaque plastic spheres, diameter 7 mm), and a liquid (400 ml of either 1 or 10 % dextrose tagged with polyeth-ylene- [ 1,2-3H]glycol were simultaneously assessed by quanti-tating the rate of appearance of the gastric markers in the duodenum. The rate of gastric emptying of cubed liver was similar whether the liver was given alone or with solutions of the rapidly emptying 1 % dextrose, but its rate of emptying was slowed by the slower emptying 10 % dextrose. Homogeni-zation of the liver speeded its emptying. Moreover, the homog-enized liver emptied even faster when dispersed in 1 % dex-trose and emptied more slowly when dispersed in 10 % dex-trose, but in both instances the liver emptied at the same rate as the solution with which it was mixed. Indigestibl