EFFECT OF VISCOSITY OF TEST MEALS ON GASTRIC EMPTYING IN DOGS

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Abstract
In 5 dogs gastric emptying of low, medium and high viscosity meals was measured via a duodenal cannula. The rate of emptying depended on the viscosity of the test meals: the time for half emptying was 4.5 .+-. 2.2 min with the low viscosity liquid meal (1 centipoise), 28.9 .+-. 9.5 min with the test meal of medium viscosity (105 centipoise), and 43 .+-. 11.8 min with the test meal of high viscosity (106 centipoise). The emptying curves of the medium and high viscosity meals were sigmoid; the curve representing the emptying of the low viscosity liquid meal followed an exponential pattern. The viscosity of the meal is an important factor for the rate of gastric emptying.