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).