Diagnosing Chronic Colic with Ultrasound: ACVIM 2006

Evaluating and treating prolonged cases of colic–those lasting three days or more–can be problematic. Horses with prolonged colic generally aren’t in enough pain for surgery, and they respond temporarily to medicines. But the condition

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Evaluating and treating prolonged cases of colic–those lasting three days or more–can be problematic. Horses with prolonged colic generally aren’t in enough pain for surgery, and they respond temporarily to medicines. But the condition persists, many times puzzling the clinician attempting to resolve it. Abby M. Sage, VMD, MS, Dipl. ACVIM, of the University of Minnesota (UM), described the use of ultrasound to help diagnose chronic colic cases at the American College of Veterinary Internal Medicine Forum in Louisville, Ky., on June 2.


A detailed history of the animal, physical examination, and rectal palpation provide the most useful information in determining the cause of colic. Veterinarians can also use hematology (blood profile), serum biochemistry, radiographs, abdominocentisis, endoscopy, laparascopy, and exploratory laparotomy to learn more about the case. However, ultrasonographic examination can also give a window into abdomen, and it is rapid and non-invasive.


Sage explained that all veterinarians are trained to ultrasound colic cases. “We do it on all the colics,” she said. “We do it on the standing horses when at all possible. You can perform an accurate and adequate ultrasound in 10 minutes. It isn’t perfect, and there are limitations, but we’ve found it to be extremely valuable…there are a lot of things we can do right away to help the horse (if we know what’s amiss in the digestive system).”


The technique involves using ultrasound on the entire abdomen, “paralumbar (in the flank area, just down from the lumbar vertebrae) to the sixth intercostal space (between the sixth and seventh rib) dorsal to ventral (top to bottom) in a longitudinal plane,” she explained. “It’s important to cover the whole abdomen and go all the way forward

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Stephanie L. Church, Editorial Director, grew up riding and caring for her family’s horses in Central Virginia and received a B.A. in journalism and equestrian studies from Averett University. She joined The Horse in 1999 and has led the editorial team since 2010. A 4-H and Pony Club graduate, she enjoys dressage, eventing, and trail riding with her former graded-stakes-winning Thoroughbred gelding, It Happened Again (“Happy”). Stephanie and Happy are based in Lexington, Kentucky.

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