[Fistulation of the stomach and residual gastric contents after ingestion of a semi-purified diet of maize starch base in the pig].
Gastric emptying was studied by measuring the residual gastric contents in 6 pigs weighing an average 56.5 kg and fitted with an indwelling gastric cannula in the middle of the greater curvature of the stomach. The feed offered was a semi-purified test meal, including 1 980 g of fresh matter, 880 g of dry matter, 61.9 g of total crude protein (N x 6.25), 7.1 g of soluble crude protein, 720 g of total starch (glucose and all its alpha-derivatives) and 7 g of hydrosoluble starch. These components were determined in the gastric contents collected at the following intervals after the meal: 30 min, 1 h, 2 h, 4 h, and 7 h. The inoffensiveness of stomach fistulation was checked by recording the electromyographic activities of the gastric antrum. The results on gastric emptying are given in figure 2. The total residual amounts of crude protein and starch were closely related to the amounts of dry matter. The soluble crude protein fraction increased stepwise, reaching 55 p. 100 of the total crude protein fraction 7 h after the meal. The soluble starch fraction was always less than 1 p. 100 of the total starch fraction. As calculated by difference, the amounts emptied were compared with those measured directly by collecting the duodenal contents in similar experimental conditions. This comparison of emptying kinetics showed large differences according to the technique used. Gastric emptying of dry matter was steadier and more marked within the 7-hour range when using gastric fistulation. The considerable difference also observed in the case of starch (fig. 3) may be interpreted as an underestimation of duodenal content starch because of the interference of bile pigments with H2O2 measurement in the enzyme analyses. A comparison of starch emptying kinetics with those of the absorption of reducing sugars suggested that sugar absorption might be restricted due to the velocity of starch hydrolysis by pancreatic alpha-amylase.
D000818:Animals; D004040:Dietary Carbohydrates / Q000008:administration & dosage / Q000378:metabolism*; D004044:Dietary Proteins / Q000008:administration & dosage / Q000378:metabolism; D005746:Gastric Emptying; D005747:Gastric Fistula; D007700:Kinetics; D008297:Male; D013213:Starch / Q000378:metabolism*; D013552:Swine; D003313:Zea mays
D004040:Dietary Carbohydrates; D004044:Dietary Proteins; D013213:Starch
Fistulation de l'estomac et contenus gastriques résiduels après ingestion d'un régime semi-purifié à base d'amidon de maïs chez le Porc.