Abstract: Apparatus for supplying respiratory gas, comprising a respiratory gas source, a control unit, a storage device, a pressure sensor instrument and/or a flow sensor instrument, a replaceable respiratory gas tube, at least one connection fitting for the respiratory gas tube, a patient interface, and a patient valve, wherein the control unit activates a first ventilation mode for a first duration and in the process actuates the respiratory gas source to specify a changing respiratory gas parameter, and the control unit activates a further therapy mode for a second duration and in the process actuates the respiratory gas source to specify a respiratory gas parameter specific to the further therapy mode, the respiratory gas tube remaining on the apparatus when switching from the first ventilation mode to the further therapy mode, and the patient valve being switched for the further therapy mode by the control unit.

Abstract: A ventilator for respiration gas supply, comprising a respiration gas source, a control unit, a memory, a pressure sensor and/or a flow sensor, an exchangeable respiration gas tube, at least one connection stub for the respiration gas tube, a patient interface and a valve. The control unit is set up to use signals from the pressure sensor and/or flow sensor to ascertain the patient's respiration phase and to ascertain the patient's current tidal volume during successive inhalations and exhalations and to compare a first set volume threshold for the tidal volume with the current tidal volume and to determine whether the latter is below the former and if so, to react by driving the respiration gas source to set a second pressure for the respiration gas for inhalation and driving the respiration gas source to set the CPAP pressure for the respiration gas for exhalation.

Abstract: The present invention relates to a method for protecting a ventilation device of a ventilator against backflowing exhaled air, and to a ventilator. A respiratory gas flow is generated by a blower device and is guided via a flow connection to a breathing interface. The respiratory gas flow is adjusted with the aid of a control device to a first ventilation pressure during an inhalation phase of the patient and to a second ventilation pressure during an exhalation phase. A characteristic variable for a flow within the flow connection is detected by a device for monitoring backflowing exhaled air. A back pressure with respect to the backflowing expiratory flow is adjusted by a specific increase of the ventilation pressure taking into consideration the characteristic variable, whereby an undesirable rebreathing into the ventilation device is counteracted by the back pressure.

Abstract: The present invention relates to a method for protecting a ventilation device of a ventilator against backflowing exhaled air, and to a ventilator. A respiratory gas flow is generated by a blower device and is guided via a flow connection to a breathing interface. The respiratory gas flow is adjusted with the aid of a control device to a first ventilation pressure during an inhalation phase of the patient and to a second ventilation pressure during an exhalation phase. A characteristic variable for a flow within the flow connection is detected in this case by means of a monitoring device for monitoring backflowing exhaled air. And, in this case, a back pressure with respect to the backflowing expiratory flow is adjusted by means of a specific increase of the ventilation pressure with consideration for the characteristic variable, whereby an undesirable rebreathing into the ventilation device is counteracted by means of the back pressure.