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Pattern of gastric emptying in the pig: relation to feeding.

Gregory, P.C.; Mcfadyen, M.; Rayner, D.V.


P.C. Gregory

M. Mcfadyen

D.V. Rayner


The aims of the present study were to compare the gastric emptying of dry matter (DM) and liquids during the feeding period with that following meal consumption, to clarify the relationship between feeding and gastric emptying, and to investigate how gastric emptying changes in growing animals. The studies were performed in pigs fitted with a gastric cannula and fed on a normal finely ground solid diet mixed with water containing CrEDTA as liquid marker. Gastric emptying was measured using a gastric evacuation technique. It was observed that between 0.75 and six hours after feeding the total amounts emptied increased, but the proportion of the meal emptied fell, with increase in meal size; emptying of both DM and liquids with large and small meals followed and exponential pattern. In contrast, while the animals were feeding, there was linear and rapid emptying of both DM and liquids following a very short (approximately two minutes) lag phase before emptying began. The rate of emptying increased linearly with body-weight (by 0.55 g DM/min and by 0.24 ml/min per kg body-weight over the range 58–200 kg), such that the emptying of digestible energy per kg metabolic body-weight (W0.75) was roughly maintained (between 2.9 and 3.2 kJ/min per kg W0.75). This suggests that the rate of emptying may be linked in some way with the metabolic requirements of the body. The biphasic pattern of gastric emptying observed is probably the intrinsic pattern of emptying of a meal which does not require breakdown of particles before emptying can occur.


GREGORY, P.C., MCFADYEN, M. and RAYNER, D.V. 1990. Pattern of gastric emptying in the pig: relation to feeding. British journal of nutrition [online], 64(1), pages 45-58. Available from:

Journal Article Type Article
Acceptance Date Jan 4, 1990
Online Publication Date Mar 9, 2007
Publication Date Jul 31, 1990
Deposit Date Sep 7, 2020
Publicly Available Date Sep 7, 2020
Journal British journal of nutrition
Print ISSN 0007-1145
Electronic ISSN 1475-2662
Publisher Cambridge University Press (CUP)
Peer Reviewed Peer Reviewed
Volume 64
Issue 1
Pages 45-58
Keywords Gastric emptying; Gastrointestinal tract; Pigs
Public URL


GREGORY 1990 Pattern of gastric emptying in the pig (1 Mb)

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© The Nutrition Society.

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