Horse Colic: Emergency Management & Life-Saving Decisions

Identify horse colic as abdominal pain that requires early diagnosis and treatment, and recognize causes like impaction, gas, strangulation, displacement, and ulcers, along with the associated symptoms.

Explore the definition and diverse etiologies of equine colic, diagnose abdominal pain signs, and guide urgent treatment by understanding congenital GI physiology, ingesta and fluid movement, and endotoxin sensitivity.

Define colic as abdominal pain in horses and note its varied etiologies. Appreciate the clinical relevance of equine anatomy, ingesta movement, intestinal fluid flow, and endotoxin sensitivity.

The horse has a monogastric stomach of 8–10 liters on the left side beneath the rib cage, with a one-way valve limiting gas movement and making radiography or ultrasonography difficult.

Examine equine gastrointestinal anatomy, including the duodenum, jejunum, ileum, and the ileocecal junction; learn how mesentery, rectal findings, and cecal landmarks guide diagnosis and surgery.

Trace the horse gastrointestinal tract from the ileum to the cecum, a right-sided fermentation vat that holds 27–30 L of ingesta.

Colonic motility in horses moves ingesta through the left ventral and left dorsal colon via peristalsis, with retrograde contractions from the pelvic flexure and a pacemaker region sensing particle size.

Identify natural abdominal openings, including the inguinal canal, umbilical area, epiploic foramen, and the spleen-left kidney space, as sites where colic-related intestinal events may occur.

Identify common clinical findings of equine colic, such as bowing with the front foot, looking at the flank, neck arching, sweating, and rolling, indicating abdominal pain.

Thoroughly examine the horse and history to localize intestinal involvement, diagnose colic. Differentiate gas, simple obstruction, strangulating obstruction with possible emergency surgery, ischemia, and non strangulating infarction, then treat accordingly.

Assess the history of present and prior colic episodes, then perform a cardiovascular and GI exam evaluating hydration, mucous membranes, capillary refill, reflux, and abdominal sounds.

Perform a rectal examination with systematic palpation of key abdominal structures, assessing the intestine for size and content. Analyze peritoneal fluid to evaluate health and identify age-related colic risks.

Master the rectal exam as the definitive equine colic assessment, palpate key abdominal and reproductive structures, and assess age-related colic conditions via peritoneal fluid color, cell count, and protein.

Assess colic pain and choose analgesia carefully, performing a thorough exam before drugs, and use NSAIDs or alpha-2 sedatives like xylazine or detomidine to balance relief with safety.

Learn how larval migration by Strongylus vulgaris causes equine colic, thromboembolism, and intestinal damage, and review larvicidal deworming with ivermectin, moxidectin, and fenbendazole.

This lecture outlines medical and surgical treatments for equine colic, prioritizing hydration, evacuation of intestinal contents, pain relief, tissue perfusion, endotoxin prevention, parasite control, and ultrasonography to monitor response.

Assess and treat equine colic with analgesia, perform an exam before drugs to avoid masking signs, and choose nonsteroidal anti-inflammatory drugs and alpha-2 agonists with butorphanol for safe relief.

Learn pain management for equine colic with analgesics and nasogastric drainage, and fluid therapy decisions (IV or nasogastric) based on obstruction type and shock status.

Identify obstructions or compromised blood supply requiring surgery to prevent death. Assess severe pain, high gastric reflux, and peritoneal fluid changes to guide urgent surgical intervention.

Assess prognosis in horses with colic by examining survival stats and prognostic indicators such as pain, distension, mucous membranes, cardiovascular function, lactate, and anion gap.