A liquid ventilation system includes a reservoir holding a perfluorochemical (PFC) fluid, and a suction pump connected to the reservoir to reduce pressure within the reservoir. A sensor is configured to measure an intra-lung pressure. An appliance is configured to be disposed within a patient. The appliance carries an injector to supply the PFC fluid through the appliance. An extraction valve is disposed on an extraction line between the appliance and the reservoir. The extraction valve is arrangeable between a first position enabling fluid communication from the appliance to the reservoir and a second position disabling fluid communication from the appliance to the reservoir.

Fan unit for a ventilator, comprising a housing with a suction connector which forms an inlet duct for the suction-side inflow of a fluid into the housing, a pressure connector which forms an outlet duct for the pressure-side outflow of the fluid from the housing, and a fan impeller mounted rotatably in the housing and being configured, by rotation, to suck in the fluid via the suction connector and to convey it through the inlet duct into the housing, and to eject the fluid again via the pressure connector and to convey it through the outlet duct out of the housing. The suction connector has at least one flow guiding element on its inner face which faces the inlet duct and defines an inlet duct nominal diameter, by which element an inlet duct internal diameter differing at least in sections from the inlet duct nominal diameter is set.

Methods for treating respiratory distress such as ARDS using foaming agent(s) (e.g., natural and/or synthetic surfactant(s)) and/or external energy (e.g., vibration, acoustic, etc.) and compositions and systems configured for performing the same.

The nebulizer gas scavenging system includes a condenser positioned in the expiratory pathway of the breathing circuit for extracting liquid from expiratory gases and redirecting the extracting liquid to the input of the nebulizer. The system is further configured to detect the actual consumption of inhaled medication by measuring the concentration of medication in the expiratory pathway and comparing it to the initial content of medication in the aerosol of the inspiratory pathway. A more accurate determination of the amount of inhaled medication is advantageous in certain critical situations involving application of medication by inhalation.