Abstract: The present invention relates to surgical instruments used in combination with endoscopes during gastrointestinal procedures for clearing a surgical site of unwanted obstructions, such as blood and/or clots. More particularly, the irrigation devices according to the invention comprise a handle comprising valves for controlling fluid flow, at least one channel for transporting fluid, and a connection port adapted to communicate directly or indirectly with an endoscope for delivering fluid to and receiving fluid from and through the endoscope. The irrigation devices and systems incorporating them can be used in any endoscopic gastrointestinal surgical procedure to clean, clear, or evacuate an area of the gastrointestinal tract, such as the stomach, in cases of accidental poisoning, drug overdose, or gastrointestinal bleeding. The irrigation device according to the present invention is capable of clearing a stomach within seconds or up to 1-2 minutes.