초록 ▼

An apparatus for assisting the spontaneous breathing of a patient includes mixing unit (1) for mixing air and oxygen has an air-flow sensor (8), an electrically controlled air valve (7), an oxygen-flow sensor (9), and an electrically controlled oxygen valve (7). A respiratory-gas pressure sensor (20

An apparatus for assisting the spontaneous breathing of a patient includes mixing unit (1) for mixing air and oxygen has an air-flow sensor (8), an electrically controlled air valve (7), an oxygen-flow sensor (9), and an electrically controlled oxygen valve (7). A respiratory-gas pressure sensor (20) is disposed on a gas duct (15) which connects the respiratory-gas unit (1) to an outlet (16). An electrically controlled outlet valve (17) is placed on the outlet (16). The air-flow sensor (8), the oxygen-flow sensor (9), the respiratory-gas pressure sensor (20), the air valve (6), the oxygen valve (7) and the outlet valve (16) are connected to an electronic control unit (40). The sensor signals produce input variables for the control unit. The control unit delivers control signals for the valves.

대표청구항 ▼

An apparatus for assisting the spontaneous breathing of a patient, comprising: a respiratory-gas mixing unit (1) for mixing air and oxygen in a desired ratio in order to supply the patient with a respiratory gas of an adjustable oxygen concentration, said mixing unit including, (a) an air conduit (2

An apparatus for assisting the spontaneous breathing of a patient, comprising: a respiratory-gas mixing unit (1) for mixing air and oxygen in a desired ratio in order to supply the patient with a respiratory gas of an adjustable oxygen concentration, said mixing unit including, (a) an air conduit (2) having an air flow sensor for generating an electrical air flow signal corresponding to the air flow, and an electrically controlled air valve (6) for adjusting the air flow, (b) an oxygen conduit (3) having an oxygen sensor (9) for generating an electrical oxygen flow signal corresponding to the oxygen flow, and an oxygen valve (7) for adjusting the oxygen flow, and (c) a mixing area (14) combining said air and oxygen conduits; an outlet (16) having an electrically controlled outlet valve (17) for adjusting the gas flow through said outlet (16) a gas duct (15) connected to said respiratory-gas mixing unit (1) and extending to said outlet (16); a patient line (19) branching off from said gas duct (15) for providing an air/oxygen mixture to the patient; a respiratory-gas pressure sensor (20) in connection with said patient line for generating an electrical signal corresponding to the pressure of the respiratory-gas in the patient line; and an electronic control unit operatively connected to said air flow sensor (8), said oxygen flow sensor (9), said respiratory-gas pressure sensor (20), said air valve (6), said oxygen valve (7), and said outlet valve (17), such that signals from said sensor are input to said control unit as variables, and said control unit outputs control signals to said valves in response thereto.