Colonic Ischemia

Colonic ischemia occurs when blood flow to the large intestine is reduced, causing damage to the colon. This condition affects the digestive system and can lead to symptoms like abdominal pain, diarrhea, and sometimes bloody stools. The colon needs a steady supply of oxygen-rich blood to function properly, and when this supply is interrupted, the tissue can become injured or die. It most commonly happens in older adults or those with conditions that affect blood circulation. Prompt diagnosis is important because severe cases can lead to complications like infection or perforation of the colon.

Colonic ischemia is a condition characterized by insufficient blood flow to the colon, resulting in ischemic injury to the colonic mucosa and potentially deeper layers. It is most often caused by transient or sustained hypoperfusion due to systemic hypotension, atherosclerosis, or embolic events affecting the mesenteric arteries. The ischemia primarily affects watershed areas such as the splenic flexure and rectosigmoid junction, which are vulnerable due to limited collateral circulation. Clinically, it presents with acute abdominal pain, tenderness, and often hematochezia. The condition ranges from mild mucosal injury to full-thickness necrosis, which can lead to colonic infarction and perforation. Early recognition is critical to prevent severe complications and guide appropriate management.