A system for generating a gaseous mixture for a treatment enclosure of a wound comprising: - a gaseous mixture generator able to deliver said gaseous mixture to the treatment enclosure at a defined flow rate, by varying a molar fraction of dioxygen of said delivered gaseous mixture and by varying a molar fraction of water vapor (H2O) of said delivered gaseous mixture, - a control unit for controlling the delivered gaseous mixture provided with a processor able to receive data relating to a pressure inside the treatment enclosure and/or designed to determine a flow rate of said gaseous mixture to be delivered inside the treatment enclosure in order to obtain an internal target pressure, the target pressure being defined by a time variation function of the pressure (TVFP) between a minimum pressure, corresponding to an ambient pressure outside the treatment enclosure, and a maximum pressure, the processor also being designed to determine a time variation function of the molar fraction of dioxygen (TVFO2) of the gaseous mixture to be delivered and a time variation function of the molar fraction of water vapor (TVFH2O) of the gaseous mixture to be delivered characterized in that the control unit comprises a sensor able to determine a data relating to a dimension (a1, a2, a3) and/or the development phase (a, b, c) of at least a part of the wound, said sensor comprising a video camera, in that the processor is configured to receive said data relating to a dimension (a1, a2, a3) and/or to a development phase (a, b, c) of at least a part of a wound, and in that the processor comprises a treatment module that determines a development phase of all or part of the wound, the determination being carried out based on the data relating to the dimension (a1, a2, a3) and/or the development phase (a, b, c) of at least a part of the wound, the development phase (a, b, c) being defined by a plurality of descriptive elements. - a gaseous mixture generator able to deliver said gaseous mixture to the treatment enclosure at a defined flow rate, by varying a molar fraction of dioxygen of said delivered gaseous mixture and by varying a molar fraction of water vapor (H2O) of said delivered gaseous mixture, - a control unit for controlling the delivered gaseous mixture provided with a processor able to receive data relating to a pressure inside the treatment enclosure and/or designed to determine a flow rate of said gaseous mixture to be delivered inside the treatment enclosure in order to obtain an internal target pressure, the target pressure being defined by a time variation function of the pressure (TVFP) between a minimum pressure, corresponding to an ambient pressure outside the treatment enclosure, and a maximum pressure, the processor also being designed to determine a time variation function of the molar fraction of dioxygen (TVFO2) of the gaseous mixture to be delivered and a time variation function of the molar fraction of water vapor (TVFH2O) of the gaseous mixture to be delivered characterized in that the control unit comprises a sensor able to determine a data relating to a dimension (a1, a2, a3) and/or the development phase (a, b, c) of at least a part of the wound, said sensor comprising a video camera, in that the processor is configured to receive said data relating to a dimension (a1, a2, a3) and/or to a development phase (a, b, c) of at least a part of a wound, and in that the processor comprises a treatment module that determines a development phase of all or part of the wound, the determination being carried out based on the data relating to the dimension (a1, a2, a3) and/or the development phase (a, b, c) of at least a part of the wound, the development phase (a, b, c) being defined by a plurality of descriptive elements.