A long, thin, flexible tube with one or more inflatable balloons at its distal tip designed to be introduced through the working channel of a gastroscope to access the small intestines (duodenum or jejunum) to administer fluids used for enteroclysis procedures (e.g., contrast medium), for radiographic visualization of the area. The balloon is inflated to its prescribed diameter to temporarily occlude the lumen of the small intestine to facilitate fluid infusion. It features a multichannel port at the proximal end for guidewire insertion, fluid infusion and individual balloon inflation. This is a single-use device.