The finer points of diagnosis can be accomplished when the abdomen is open for inspection during a surgical procedure. This situation is called an acute abdomen.
This diagnosis is defined at the time of surgery for suspected appendicitis.
I presume you mean diverticulum surgery? There are various type of diverticulum and you have to specify the site of the lesion to get a correct response
The vast majority of Meckel's diverticulum diagnoses are incidental, that is, discovered during barium studies, abdominal surgery for other conditions, or autopsy.
Arnio, P., and I. S. Salonen. "Abdominal disorders arising from 71 Meckel's diverticulum." Annals of Surgery and Gynecology 89, no. 4 (2000): 281-84.
The prognosis for Meckel's diverticulum is generally good if the condition is diagnosed and treated promptly. In most cases, surgery to remove the diverticulum can resolve any complications or symptoms. However, if complications such as perforation, obstruction, or bleeding occur and are not treated promptly, they can lead to serious consequences.
If surgery is indicated for Meckel's diverticulum, an enema is given (unless contraindicated by complications) to completely clear the bowel and avoid infection during surgery.
The situation may be so acute that surgery is needed on an emergency basis. This is often the case with bowel obstruction. With heavy bleeding or severe pain, whatever the cause, surgery is required.
al Mahmeed, T., J. K. MacFarlane, and D. Filipenko. "Ischemic Meckel's diverticulum and acute appendicitis." Canadian Journal of Surgery 43, no. 2 (2000): 146-47.
Heider, R., D. M. Warshauer, and K. E. Behrns. "Inverted Meckel's diverticulum as a source of chronic gastrointestinal blood loss." Surgery 128, no. 1 (2000): 107-08.
Surgery is performed under general anesthetic. The small intestine is isolated and the diverticulum is removed, sometimes with a small segment of the intestines.
Harold Clifford Edwards has written: 'Diverticula and diverticulitis of the intestine' -- subject(s): Intestines, Diverticulum, Surgery, Diverticulitis, Diverticula
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