The appearance of the gastrointestinal tract in clinically normal pediatric1 and adult2 dogs has been described; the descriptions have included weight-correlated references for total wall thickness. Thickness of the mucosal layer for the stomach, duodenum, and jejunum has been reported1 in pediatric dogs up to 12 weeks of age; however, to our knowledge, these values have not been reported in adult dogs, nor have they been correlated with body weight. These measurements have been applied in pediatric dogs with parvovirus infection, whereby there is thinning of the mucosa but the total wall thickness remains unaffected.3 It is the authors’ clinical impression that hemorrhagic gastroenteritis in adult dogs may yield an ultrasonographic appearance for the wall layers similar to the appearance of the wall layers in pediatric dogs with parvovirus infection. Thus, determination of the thickness for individual wall layers may assist clinicians when evaluating intestinal disorders in adult dogs.
The purposes of the study reported here were to measure the thickness of individual wall layers of the duodenum, jejunum, and colon of dogs and to determine associations between these values and body weight. Our hypotheses were that the mucosal layer would be the thickest layer of the duodenum and jejunum; there would be a significant difference in the thickness of the mucosal layer of the duodenum and jejunum for small, medium, and large dogs; the submucosa, muscularis, and serosa of the duodenum and jejunum would not differ significantly among small, medium, and large dogs; and all wall layers would contribute equally to the total colonic wall thickness.
IU22 xMATRIX ultrasound system, Philips Healthcare, Andover, Mass.
C8–5 transducer, Philips Healthcare, Andover, Mass.
L12–5 transducer, Philips Healthcare, Andover, Mass.
Vue Solutions software, version 11.3, Carestream Health Inc, Rochester, NY.
VassarStats, Vassar College, Poughkeepsie, NY.
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