The database of 110 horses, which underwent colic surgery was analysed. The correlation between the primary GI lesion, causes of colic, duration of colic and the grade of gastric ulceration post surgery was checked. The information including age, breed, gender and type of use was additionally obtained. 87 patients ( 79%) had gastric ulceration. The duration of colic has a significant positive influence on the incidence of gastric ulceration. All stallions suffered from gastric ulceration. Small intestine (42%) and large intestine (58%) were almost equally affected.
The acute and the slowly developing forms of small intestinal colic did not show any significant association with the presence of EGUS. This was the same in the horses with large intestinal pathology, but 80% of the acute large intestinal forms (Torsio coli totalis) showed mild gastric ulceration (grade 1-2 according to Murray). The most presented GI ¿ lesion among the slowly developing large intestinal forms was the right dorsal displacement (20 cases).The low p-value suggest that there might be an association between the presence of EGUS and slowly developing colic problems of the large bowel. General anesthesia and preoperative medical treatment in horses with abdominal pain do not forcible lead to gastric ulceration. The answer of the primary asked question is : Horses which had colic surgery, should be evaluated by gastroscopy prior to medical treatment with acid suppressive agents, because all statistical analyses did not show any significant results. The procedure of gastroscopy can be done post surgery without any risks to confirm the need of gastric treatment. Therefore gastroscopy should be routinely done in horses after colic surgery.