Postoperative intestinal motility in dogs and sheep

Buéno, Lionel; Fioramonti, Jean; Ruckebusch, Y.

doi:10.1007/bf01072352

Cited by 54 publications

(34 citation statements)

References 11 publications

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“…Only a few studies dealing with intraoperative electromyographical activity can be found in literature [3,8]. McIntyre and Bueno reported a loss of spike activity during open surgery in dogs and sheep [3,8].…”

Section: Discussionmentioning

confidence: 99%

Intraabdominal humidity and electromyographic activity of the gastrointestinal tract

et al. 1995

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The purpose of this study was to observe electromyographic activity of stomach, small bowel, and colon during and early after identical laparoscopic and conventional operations to compare the operative trauma. In nine dogs a cholecystectomy was performed laparoscopically (n = 5) or by laparotomy (n = 4). Analysis of electromyographic activity focused on rhythm, frequency, and amplitudes of slow waves. Furthermore, oxygenation of blood and tissue, intestinal impedance, intraabdominal humidity, and temperature were documented to investigate their influence on slow waves. Open cholecystectomy caused an evident decrease of frequency and amplitude of colonic slow waves in comparison to laparoscopic cholecystectomy. Arrhythmic slow waves were observed only in the stomach during conventional cholecystectomy. Stomach and small intestine showed no significant difference of frequency and amplitude of slow waves in both operation groups. Intraabdominal humidity and intestinal impedance differed significantly in laparoscopy and laparotomy. Laparoscopic cholecystectomy proceeded with a minor abdominal trauma documented by smaller alterations of slow waves. This may be caused by reduced peritoneal desiccation.

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Section: Discussionmentioning

confidence: 99%

Intraabdominal humidity and electromyographic activity of the gastrointestinal tract

et al. 1995

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“…immediately after vagotomy in sheep. We do not think that these immediate changes are effects of surgery per se since m.m.c.s are seen at their normal frequency within 24 h of surgery in this species (Bueno, Fioramonti & Ruckebusch, 1978). In the first few days after vagotomy r.s.a.…”

Section: Discussionmentioning

confidence: 99%

Initiation of migrating myoelectric complex in sheep by duodenal acidification and hyperosmolarity: role of vagus nerves.

Gregory¹,

Rayner²,

Wenham³

1984

The Journal of Physiology

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SUMMARY1. Gastrointestinal motility was studied in conscious sheep by X-radiography and by electromyography from chronically implanted electrodes before and after total thoracic vagotomy.2. Duodenal infusion of 0 5-3 mmol HCl (0*035-01 M-HCl) induced premature duodenal regular spiking activity (r.s.a.) within 1-7 min in fifteen of seventeen sheep studied when infused at 20 min after a natural r.s.a.3. There was no correlation between abomasal pH and any phase of the migrating 5. Vagotomy did not prevent the initiation or migration of the m.m.c., but reduced the rate of propagation of the r.s.a. from 40-5+7-2 (mean+S.E. of mean) to 16-7+0-1 cm/min in the duodenum, from 27-3+441 to 16-6+0 8 cm/min in the jejunum, and from 21 4 + 1 1 to 13-7 + 0 7 cm/min in the proximal ileum. Initially the frequency of r.s.a. increased, especially in the duodenum where they recurred at an interval of 98-4 + 6-8 min before vagotomy; and at 23-4 + 1P8 min in the first 24 h after vagotomy; the interval had lengthened to 86-7 + 5-2 min 2-3 weeks after vagotomy.6. Premature duodenal r.s.a. was not induced by duodenal infusion of HCl in five, or by duodenal infusion of hyperosmolar NaCl in three chronically vagotomized sheep.7. It is concluded that the vagus nerves contribute to the regulation of the frequency and propagation of the m.m.c. in sheep; duodenal acidification is not essential nor is it the normal stimulus for initiation of r.s.a., but duodenal infusion of HCl or hyperosmolar NaCl can initiate a premature duodenal r.s.a. via the vagus nerves.

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“…This pattern of bursts is similar to that observed in the antrum of the guinea-pig, rat, in the abomasum of ruminants and in the small intestine of all species (Gonella, 1978). Recording sessions were undertaken 3-4 d post-operatively in order to avoid the period of paralytic ileus commonly observed after abdominal surgery (Bueno, Fioramonti & Ruckebusch, 1978;Abrahamson, Glise & Glise, 1979). The frequency of bursts varied over a wide range up to 4/min as also reported in pigs (Laplace, 1972) and in the abomasum of ruminants (Van Bruchem, 1977;Madhloum, 1982).…”

Section: Discussionmentioning

confidence: 99%

Specific Effects of Thoracic Vagotomy on the Electrical Activity of the Gastric Antrum and Pylorus in Rabbits

Deloof

Rousseau

1985

Exp Physiol

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SUMMARYThe electrical activity of the antrum and the pylorus was recorded in rabbits, with chronically implanted electrodes. Effects of food intake were studied before and after bilateral vagotomy (b.v.), ventral vagotomy (v.v.) or dorsal vagotomy (d.v.) performed just above the diaphragm. In fasted animals, the electrical activity was characterized by bursts of potentials at a frequency of 1-93 + 0 09/min, initiated 45 mm or 20 mm from the pylorus in the greater and the lesser curvature respectively. The velocity of propagation of the bursts increased from 5-6 mm/s in the proximal antrum to 12-25 mm/s in the last 10 mm ofthe antrum along the greater curvature and from 2-4 mm/s to 5-15 mm/s along the lesser curvature. Feeding led to a rapid increase in the frequency of both antral and pyloric bursts up to 4-01 + O-10/min, lasting 30-60 min after a large meal but only 15 min when the amount of food was restricted. The behaviour of the rabbits was not significantly affected by bilateral or ventral vagotomy. In contrast, dorsal vagotomy resulted in a drastic decrease of food intake. The mean frequency (fo) ofbursts before meals was significantly reduced after vagotomy in v.v. animals (1 49 + 0-1 /min, P < 0 02) and in d.v. animals (1 34 + 0-08/min, P < 0 001) but not in b.v. or sham-operated rabbits. For the first 3 d after surgery, the frequency (f) of bursts during the 30 min after the beginning of meals was significantly different fromfo and reduced relative tofbefore nerve sections (1 9 + 0-1 1/min and 2 32 + 0.20/min respectively in b.v. and v.v. animals). In sham-operated animals, the value offwas closely similar tofbefore surgery. The effects of meals on the frequency of bursts were again similar to the effects in intact animals within 4-6 d for v.v. animals and 6-9 d for b.v. animals. In the pylorus, a different pattern for electrical activity, which consisted of trains of spikes at a frequency of 0 3/s, was superimposed on the bursts and was most marked in d.v. animals. The spiking activity was not affected by atropine, phentolamine or propranolol. The role of the vagus nerve in the motile responses of the antrum to food intake is discussed. These results indicate the existence of a non-cholinergic, non-adrenergic innervation of the pylorus which is involved in the opening of the sphincter and appears to be mediated by the dorsal vagal trunk.

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Postoperative intestinal motility in dogs and sheep

Cited by 54 publications

References 11 publications

Intraabdominal humidity and electromyographic activity of the gastrointestinal tract

Intraabdominal humidity and electromyographic activity of the gastrointestinal tract

Initiation of migrating myoelectric complex in sheep by duodenal acidification and hyperosmolarity: role of vagus nerves.

Specific Effects of Thoracic Vagotomy on the Electrical Activity of the Gastric Antrum and Pylorus in Rabbits

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