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A radiological investigation of the effects of cannulation on intestinal motility and digesta flow in sheep

Published online by Cambridge University Press:  27 March 2009

G. Wenham  and
R. S. Wyburn
G. Wenham
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen, Scotland, AB2 9SB
R. S. Wyburn
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen, Scotland, AB2 9SB
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Summary

Radiological examinations were carried out on ten sheep to see what changes in intestinal motility and flow of digesta were caused by intestinal cannulation. Barium sulphate was injected or infused into the abomasum via an implanted catheter; its passage through the intestine and associated muscular contractions were observed using X-ray image intensification. Once the normal pattern had been established for each individual, single or re-entrant cannulae were inserted into one of four positions in the small intestine.

All the cannulations caused some disruption of the normal flow of digesta, causing retention of digesta and distension of the intestine around and proximal to the intraluminal flanges of the cannulae. The duodenum was affected the most, particularly by one type of re-entrant cannula which reduced the degree of jejunal filling; peristaltic contractions often failed to propagate beyond these cannulae and also caused some retrograde movement of digesta between the cannulation site and the duodenal bulb during the irregular contraction phase (ICP) of the migrating myoelectric complex (MMC). These re-entrant cannulae also impaired the clearing effect of regular contraction phase (RCP).

Type
Research Article
Information
The Journal of Agricultural Science , Volume 95 , Issue 3 , December 1980 , pp. 539 - 546
Copyright
Copyright © Cambridge University Press 1980

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