A medical spraying device and for irrigating a wound, in particular lavage system, have a liquid reservoir for a medical irrigation liquid or a connection for such a liquid reservoir and a compressed gas reservoir. 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. 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.
