The invention relates to a medical spray device, in particular a lavage system, comprising a compressed gas supply conduit for guiding a gas flow, a liquid supply conduit for supplying a liquid, a dispensing tube having an open tube end for spraying fine droplets or a spray mist of a liquid-gas mixture, and an operable valve element that is arranged in the compressed gas supply conduit, whereby a constriction of the cross- sectional area is provided in the dispensing tube and a merging site is arranged in the region of the constriction through which the liquid merges into the gas flow from the compressed gas supply conduit, whereby the constriction forms a nozzle in the dispensing tube. The invention also relates to a spray device kit comprising a medical spray device of this type, a gas supply conduit, in particular flexible gas supply conduit, a pressure regulator, and a compressed gas container.
