“…The etiological mechanisms are unclear, although PCI reportedly develops in association with raised intra-intestinal pressure due to ileus (11), surgery (12), colonoscopy (13), respiratory conditions such as chronic bronchitis and emphysema (14), trichloroethylene exposure (15), connective tissue diseases (16), immunosuppressant therapy (1), ingestion of carbohydrates such as lactulose (17) and sorbitol (18), and counter-perfusion super-saturation (19).…”