 - Patients with known or suspected gastrointestinal obstruction due to significant stricture based upon the clinical symptoms nausea, vomiting, abdominal distention, or abdominal pain confirmed by pre-procedure evaluation. Pre-procedure evaluation includes CT enterography or small bowel follow through performed at Mayo or previously at an outside institution which demonstrates mechanical obstruction mechanical obstruction defined as small bowel narrowing with pre-stenotic dilatation; additionally, a high-grade stenotic ileocecal valve or ileocolonic anastomosis found by colonoscopy. 