Ileocolic intussusception: extensive reflux of air preceding pneumatic reduction.

The use of an air enema for diagnosis and treatment of intussusception has recently gained popularity. The current end point for reduction is the reflux of air into the terminal ileum. The authors report three cases in which air freely refluxed into the terminal ileum without complete reduction of the intussusceptum. Thus, reflux of air alone cannot be relied on as the sole criterion for reduction. Close examination of the cecum for a persistent filling defect is imperative to exclude unsuccessful reduction.