The unique and patented principle of the RIOCATH® Rectal Tube is based on the RIOCATH® Brand’s revolutionary principle of gentle unfurling, inside-out technology. As the Rectal Tube is administered it slowly unrolls from inside the device. As the soft polymer tube unfurls the inside layer becomes the outside layer as it expands upward. Unlike traditional hard tubes, this unique mechanism prevents damage to the anal wall and cannot be inserted to far. RIOCATH® technology allows easy insertion without any friction or discomfort to the baby.