"Complications of acute appendicitis are perforation, peritonitis, and
abscess development. Signs of the development of peritonitis include
abdominal pain and distention, tachycardia, tachypnea, nausea, vomiting,
and fever. Because peritonitis can cause hypovolemic shock, hypotension
can develop. Deficient fluid volume would not cause a fever. Intestinal
obstruction would cause abdominal distention, diminished or absent
bowel sounds, and abdominal pain. Bowel ischemia has signs and symptoms
similar to those found with intestinal obstruction."