Certified Pediatric Nurse Exam Practice 2026 – Complete Study Resource

A barium enema is the most appropriate test for confirming intussusception in a toddler experiencing abdominal pain. This imaging technique involves the introduction of a contrast material (barium) into the rectum, which fills the intestines and allows for visualization of the bowel on X-ray imaging. Intussusception appears as a classic "target sign" or "doughnut sign" on X-ray, indicating the presence of one segment of the intestine telescoping into another.

This test is particularly valuable in pediatric patients, as it provides not only diagnostic confirmation but can sometimes also serve as a therapeutic intervention by helping to reduce the intussusception. In contrast, the other options—suprapubic catheter insertion, nasogastric tube insertion, and indwelling urinary catheter insertion—are not relevant for diagnosing intussusception. They are medical procedures focused on different aspects of patient care and do not provide information about intestinal structure or potential obstructions.