The term ileus signifies not a disease, not a symptom, but a group of symptoms associated with many and widely varying causes. These symptoms are abdominal pain, nausea or vomiting, distension and intestinal obstruction. The relative importance of each symptom varies in the individual case, while collectively they may indicate a condition that varies between harmless postoperative discomfort and a rapidly fatal obstruction.
The simplest classification of ileus includes, on the one hand, the mechanical type, where the intestinal obstruction is due to some form of physical interference with the intestinal current, and, on the other hand, the dynamic ileus, in which the obstructions are secondary to some interference with the neuromuscular mechanism of the gut. In the mechanical class we should include stricture, tumors, invaginations, bands, etc. In the dynamic class would fall those cases due to peritonitis, trauma, sepsis, reflex irritations, spinal lesions, etc. But even in the
MUNRO JC. DYNAMIC ILEUS.. JAMA. 1907;XLIX(11):901-903. doi:10.1001/jama.1907.25320110013001b