Transparent-cap-fitted colonoscopy shows higher performance with cecal intubation time in difficult cases

Figure 1 Advantage of cap-fitted colonoscopy for preventing red-out. A: Although the precise direction could not be judged, colonoscopy showed a slight fold (white arrows) without red-out; B: A subtle movement showed a dark area at the 11 o’clock position (white arrow); C: Following the dark are at the 11 o’clock position enabled the colonoscopist to find the direction of insertion (black arrows).

Figure 2 Advantage of cap-fitted colonoscopy for observing lateral side. A: The colonoscopist easily noticed the route of insertion because the transparent cap showed the small dark lumen at the 1 o’clock position through its lateral wall (black arrows); B: Following the route shown through the lateral wall of the transparent cap, a wide lumen was found easily.

Figure 3 The opposite, blind side of the folds could be observed with fewer problems during colonoscopy. A: Compressing the tip of a fold straightened the entire fold and improved the view; B: Bending the tip of the endoscope allowed a front view of the lesion at the blind side of the fold.