Ileus

Ileus is a condition where the intestines temporarily stop moving food and waste through the digestive system. It affects the gastrointestinal tract, which is responsible for digestion and nutrient absorption. When the intestines do not contract properly, it causes a blockage-like effect without a physical obstruction. This leads to symptoms such as abdominal pain, bloating, and difficulty passing gas or stool. The condition can disrupt normal digestion and cause discomfort. It often occurs after surgery or due to certain medications. Understanding ileus helps explain why the digestive system may slow down unexpectedly.

Ileus is defined as a functional obstruction of the bowel caused by impaired intestinal motility without a mechanical blockage. It results from disruption of the coordinated peristaltic contractions of the smooth muscle in the gastrointestinal tract. Common causes include postoperative states, electrolyte imbalances, medications such as opioids, and systemic illnesses. The condition leads to accumulation of gas and fluids within the bowel, causing distension, abdominal pain, and nausea. It is clinically significant because it can mimic mechanical obstruction and may lead to complications like bowel ischemia if prolonged. Diagnosis requires distinguishing it from true mechanical obstruction to guide appropriate management.