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Gastrointestinal Tract

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Gastrointestinal Tract – PowerPoint PPT presentation

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Title: Gastrointestinal Tract


1
Gastrointestinal Tract
Chess Adams, DVM
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Goals
  • Radiographic abnormalities
  • Esophagus to colon
  • Differentiate
  • Mechanical (obstructive) ileus
  • Functional ileus
  • Recognize enlarged small intestine

4
Esophagus
  • Normal - not usually seen
  • Diameter width of a vertebral body
  • Will dilate during anesthesia

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Feline Esophaguscaudal 1/3 smooth muscle
7
Megaesophagus
  • Often seen on surveys - look for
    tracheoesophageal stripe sign
  • May be locally or generally enlarged
  • Rule out foreign body
  • May require barium esophagram

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Barium Esophagram
  • Thin suspension - for suspected megaesophagus
  • Paste - to define mucosal abnormality
  • Mix with food - if above are negative
  • Liquid paste soft food kibbles

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Persistent right 4th aortic arch
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Stomach
  • Recognize the compartments
  • Fundus
  • Body
  • Pylorus
  • Contrast
  • Negative - air
  • Positive - barium

18
Fundus
19
Enlarged stomach
  • Post-prandial?
  • Dilatation
  • Or is it VOLVULUS??!

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Small Intestines
  • Should be evenly spaced
  • May be displaced by other organs
  • If bunched linear FB, peritonitis or adhesions

25
Evenly spaced intestines
Here displaced by an enlarged spleen
26
GI Contents
  • Small bowel gas or homogeneous fluid
  • Stomach gas or granular ingesta
  • Colon gas or granular feces

27
Bowel Diameter(measure serosa to serosa)
  • Compare to VBE 2nd or 5th lumbar vertebra
  • Duodenum 1.5 x width of VBE (cat unknown)
  • Jejunum/ileum 1 x width of VBE (cat 2x)
  • Colon 2.5 x width of VBE (cat also)

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Ileus increased bowel diameter
  • Functional one population of SI - bowel m.
    hypotonicity - excessive secretions
  • Mechanical (obstruction) two populations of SI
    - foreign body - intussusception -
    neoplasia

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Normal
Functional Ileus
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When to say. Cut!
  • Two populations of small bowel diameters AND
  • The dilated segment exceeds normal maximum (the
    VBE rule)

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Ileus?
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Mechanical (Obstructive) Ileus
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Right lateral
Left lateral
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Linear Foreign Body
  • Bunching (pleating) of bowel
  • Crescent-shaped gas collections in bowel
  • Loss of abdominal detail

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Linear FB
Normal hyperperistalsis
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Bowel Signs on GI Study
  • Mucosal filling defects
  • Thickened bowel walls
  • Increased bowel diameter
  • Bunching (pleating) of bowel
  • Not on survey films

41
Normal GI Study
  • You may see pseudoulcers - canine duodenum
  • You may see string of pearls - feline duoden.

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End
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