Final answer:
The most common cause of SBO in patients with no history of abdominal surgery is adhesions. Other causes include hernias, tumors, strictures, and volvulus.
Step-by-step explanation:
The most common cause of Small Bowel Obstruction (SBO) in patients with no history of abdominal surgery is adhesions. Adhesions occur when scar tissue forms between abdominal organs or between organs and the abdominal wall. Although adhesions can occur after any type of abdominal surgery, they can also develop without any previous surgical intervention.
For example, in cases of pelvic inflammatory disease, inflammation in the pelvic organs can lead to the formation of adhesions. These adhesions can then cause the bowel to become twisted or blocked, resulting in SBO.
In addition to adhesions, other causes of SBO in patients without a history of abdominal surgery include hernias, tumors, strictures, and volvulus.