A spray cap for use with an endoscope. The endoscope includes a liquid channel and an open channel. The spray cap includes a body portion connectable with an endoscope having an end wall defining an obstruction portion configured to obstruct the liquid channel of the endoscope and an open portion configured to permit use of the open channel. The spray cap having an orifice system extending through the obstruction portion in fluid communication with the liquid channel to direct fluid flow from the liquid channel into a treatment volume of a patient along a modified flow pattern.
