Ventilation drive for an anesthesia device and method for operating such a ventilation drive
AssigneeDrägerwerk AG & Co. KGaA
InventorsAndreas Brandt, Ralf Heesch, Marina Wahl
Life of this patent
Estimating the term…
Abstract
A ventilation drive (10) for an anesthesia device and a method for operating such a ventilation drive (10) are provided. The ventilation drive includes a blower unit (12), a pressure chamber (14) and a flexible bag (16) located in the pressure chamber (14). An internal volume of the bag (16) is coupled to an inspiratory branch (20) of a ventilation line. The blower unit (12) can be coupled to the internal volume of an outlet side and to an air inlet (26) for feeding ambient air on an inlet side. Further, a flow sensor (36) is provided between the outlet side of the blower unit (12) and the pressure chamber (14).
Claims18
A ventilation drive comprising:
- a blower unit;
- a pressure chamber;
- and
- a flexible bag located in the pressure chamber;
- an air inlet, wherein an internal volume of the bag is coupled to an inspiratory branch of a ventilation line, and the blower unit is configured to be coupled to an internal volume of the pressure chamber on an outlet side of the blower unit and to the air inlet for supplying ambient air on an inlet side of the blower unit;
- a flow sensor between the outlet side of the blower unit and the pressure chamber;
- and
- a directional control valve between the blower unit and the pressure chamber, wherein a first gas path and a second path are configured to be switched by means of the directional control valve, wherein the blower unit is configured to deliver ambient air drawn in from the surrounding area into the pressure chamber by means of the first gas path and wherein the blower unit is configured to deliver air leaving the pressure chamber into the surrounding area by means of the second gas path.
A method for operating a ventilation drive, the method comprising the steps of:
- providing a ventilation drive comprising a blower unit, a pressure chamber, a flexible bag located in the pressure chamber, an air inlet, wherein an internal volume of the bag is coupled to an inspiratory branch of a ventilation line, the blower unit being configured to be coupled to an internal volume of the pressure chamber on an outlet side of the blower unit and to the air inlet for supplying ambient air on an inlet side of the blower unit and a flow sensor between the outlet side of the blower unit and the pressure chamber;
- providing the ventilation drive with a directional control valve between the blower unit and the pressure chamber, wherein a first gas path and a second path are configured to be switched by means of the directional control valve, wherein the blower unit is configured to deliver ambient air drawn in from the surrounding area into the pressure chamber via the first gas path and wherein the blower unit is configured to deliver air leaving the pressure chamber into the surrounding area via the second gas path;
- drawing ambient air in by means of the blower unit;
- and
- delivering the drawn ambient air into the pressure chamber for compressing the bag as well as for displacing a part of the breathing gas volume present in the bag into the inspiratory branch.
A medical device with a ventilation drive, the ventilation drive comprising:
- a blower unit;
- a pressure chamber;
- a flexible bag located in the pressure chamber;
- an air inlet, wherein an internal volume of the bag is coupled to an inspiratory branch of a ventilation line, the blower unit being configured to be coupled to an internal volume of the pressure chamber on an outlet side of the blower unit and to the air inlet for supplying ambient air on an inlet side of the blower unit;
- a flow sensor between the outlet side of the blower unit and the pressure chamber;
- and
- a directional control valve between the blower unit and the pressure chamber, wherein a first gas path and a second path are configured to be switched by means of the directional control valve, wherein the blower unit delivers ambient air drawn in from the surrounding area into the pressure chamber via the first gas path and wherein the blower unit delivers air leaving the pressure chamber into the surrounding area via the second gas path.
Dependencies are inferred from the claim text.