Abstract: An anesthesia system includes a volume reflector, a breathing circuit, a processing unit, and a display operatively connected to the processing unit. The processing unit is configured to provide a status indicator on the display for gas in the volume reflector, the status indicator including a graphical representation of an extent of a driving gas of the volume reflector and/or a patient gas in the volume reflector, and/or a flow of gas and a direction of the flow in the volume reflector, and/or a waste gas flow out of the volume reflector relative a fresh gas flow in the system, and/or a re-breathing fraction (RBF), and/or a balance between the fresh gas flow and patient uptake and/or leakage of gas from the breathing circuit.

Abstract: A Volume Reflector indicator for an anesthesia system is disclosed. The anesthesia system includes a volume reflector (30), a breathing circuit (40), a processing unit (10), and a display (20) operatively connected to said processing unit (10), wherein said processing unit (10) is configured to provide a status indicator (50) on said display (20) for gas in said volume reflector (30), said status indicator (50) including a graphical representation of (51) an extent of a driving gas of said volume reflector (30) and/or a patient gas in said volume reflector (30), and/or (52) a flow of gas and a direction of said flow in said volume reflector (30), and/or (53) a waste gas flow out of said volume reflector (30) relative a fresh gas flow in said system (1), and/or (54) a re-breathing fraction (RBF), and/or (55) a balance between said fresh gas flow and patient uptake and/or leakage of gas from said breathing circuit.

Abstract: An anesthetic breathing apparatus has a breathing circuit having an inspiratory gas output port and an expiratory gas input port, and a control unit that sets the anesthetic breathing apparatus selectively in a first mode of operation to provide inspiratory gas, fresh gas and/or breathing gas recirculated in said breathing circuit, via said inspiratory gas output port, enable recirculation into said breathing circuit and/or evacuation via the expiratory input port for manual or mechanical ventilation by said anesthetic breathing apparatus. The control unit is also able to set the anesthetic breathing apparatus selectively in a second mode of operation to provide a flow of fresh gas via a fresh gas output port to an external breathing system connected thereto, disable recirculation and/or evacuation via the expiratory input port. An exhaust of the breathing circuit is connected to a gas input port of the anesthetic breathing apparatus for gas scavenging via said anesthetic breathing apparatus.