The invention relates to a medical spraying device for irrigating a wound, in particular lavage system, comprising a liquid reservoir for a medical irrigation liquid or a connection for such a liquid reservoir and a compressed gas reservoir, wherein the compressed gas reservoir is connected or connectable via a pressure line to the liquid reservoir, such that the irrigation liquid can be pushed by the gas pressure of the compressed gas reservoir acting on the irrigation liquid through a nozzle in order to produce a spray cone, wherein at least one pressure relief valve is arranged in the wall of the pressure line and opens outwardly and closes the pressure line in accordance with the gas pressure from the compressed gas reservoir. The invention also relates to the use of a medical spraying device according to one of the preceding claims for producing a spray cone for debriding infected tissue and to a method for producing a spray cone of a medical irrigation liquid, in which a gas pressure is conveyed from a compressed gas reservoir through a pressure line into a liquid reservoir of the medical irrigation liquid, and the irrigation liquid is pushed out from the liquid reservoir through a nozzle by means of the gas pressure, wherein the spray cone is produced in that the irrigation liquid flows through the nozzle, wherein, if a limit pressure in the pressure line is exceeded, at least one pressure relief valve in the pressure line is opened and the compressed gas thus flows into the surrounding environment and the pressure in the pressure line is reduced, preferably limited.
