Investigation for shortening of the time required , easiness and psychological stress for hemostasis using new endoscopic imaging technology (Dual Red Imaging)

Interventions: 30 cases Period:From August 1 2012 until March 19 2014 DRI or WLI was used alternately in between each bleeding occasion until complete hemostasis was achieved. 3 endpoints were assessed for each bleeding occasion.
Primary outcome(s): 1.The average time required for hemostasis by hemostatic forceps in DRI is shorter than that in WLI. 2.The easiness of hemostasis is better in DRI than in WLI. 3. The psychological stress for hemostasis in DRI is lower than that in WLI.
Study Design: Single arm Non-randomized