Endoscopy is a technique used in medicine to look inside the body. The procedure uses a machine called an endoscope to examine the interior of a hollow organ or cavity of the body. Unlike many other medical imaging techniques, endoscopes are inserted directly into the organ.Endoscopic injection of bleeding peptic ulcers with adrenaline has been practised since the 1970s, endoscopic heater probes have been used since the 1980s, and Argon plasma coagulation has been used since the 1990s. More recently, adrenaline injection tends to be combined with either heater probe coagulation or argon plasma coagulation to minimize the chance of an ulcer rebleeding. The disadvantage of this treatment is a low risk of perforation of the gastric wall and a low risk of peritonitisCombined therapy may work better than epinephrine alone. However, there is no evidence that one kind of treatment is more effective than the other