Successful hemostasis with red dichromatic imaging for bleeding rectal dieulafoy’s lesion

A 74-year-old man with a history of type 2 diabetes mellitus and hemodialysis suffered from bloody stool for 2 days and underwent a colonoscopy. Laboratory data showed a drop in hemoglobin to 7.2 g/dL. During the colonoscopy, fresh blood was observed in the rectum, where a Dieulafoy's lesion was actively bleeding. Under the white light image, the intestinal wall was coated with fresh blood, making it difficult to clearly identify the bleeding point ([Fig. 1], [Video 1]). We switched to the red dichromatic imaging (RDI) mode for further examination, which allowed us to accurately locate the bleeding point and perform hemostasis ([Fig. 2]). In the end, the hemostasis of Dieulafoy's lesion was successfully achieved ([Fig. 3]).