System And Process For Supplying Respiratory Gas Under Pressure Or Volumetrically
First Claim
1. A system for supplying respiratory gas to a patient according to respiratory cycles, the system comprising:
- a housing, a turbine inside the housing, a patient inspiration flow outlet on the side of the housing and in flow communication with the turbine, an exhalation valve interface on the side housing, a proximal pressure interface on the side of the housing, an exhalation flow inlet on the side of the housing, a first flow sensor inside the housing in flow communication with the patient inspiration flow outlet capable of generating a first flow signal, a first pressure sensor inside the housing in pressure communication with the proximal pressure interface capable of generating a first pressure signal, a second flow sensor inside the housing in flow communication with the exhalation flow inlet capable of generating a second flow signal, a second pressure sensor inside the housing in pressure communication with the exhalation valve interface capable of generating a second pressure signal, a central processing unit in electrical communication with the first and second pressure and flow sensors to receive pressure and flow signals therefrom, and a turbine speed controller board in electrical communication with the central processing unit and the turbine, wherein the central processing unit and the speed controller board coact to control the rotational speed of the turbine based on at least two pressure and/or a flow signals from the first and second pressure and flow sensors.
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Accused Products
Abstract
The object of the invention is a device for supplying respiratory gas to a patient according to respiratory cycles, comprising a gaseous flow rate generator provided with a turbine with low inertia and high nominal speed, a first circuit called a supply circuit for the gaseous flow toward a respiratory mask or an intubation means of the patient, means for measuring pressure and/or measuring flow rate of the gaseous flow, computation means for parameters of pressure and/or flow rate, and means for controlling the speed of rotation of the generator, characterized in that the measuring means, the computation means and the speed control means coact automatically to control the speed of rotation of the turbine as a function of the inspiration and expiration phases and as a function of patient pressure signals and/or inspiration flow rate signals.
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Citations
21 Claims
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1. A system for supplying respiratory gas to a patient according to respiratory cycles, the system comprising:
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a housing, a turbine inside the housing, a patient inspiration flow outlet on the side of the housing and in flow communication with the turbine, an exhalation valve interface on the side housing, a proximal pressure interface on the side of the housing, an exhalation flow inlet on the side of the housing, a first flow sensor inside the housing in flow communication with the patient inspiration flow outlet capable of generating a first flow signal, a first pressure sensor inside the housing in pressure communication with the proximal pressure interface capable of generating a first pressure signal, a second flow sensor inside the housing in flow communication with the exhalation flow inlet capable of generating a second flow signal, a second pressure sensor inside the housing in pressure communication with the exhalation valve interface capable of generating a second pressure signal, a central processing unit in electrical communication with the first and second pressure and flow sensors to receive pressure and flow signals therefrom, and a turbine speed controller board in electrical communication with the central processing unit and the turbine, wherein the central processing unit and the speed controller board coact to control the rotational speed of the turbine based on at least two pressure and/or a flow signals from the first and second pressure and flow sensors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for supplying a respiratroy gas to a patient, the method comprising:
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measuring a patient inspiration outlet flow and providing a first flow signal;
measuring a proximal interface pressure and providing a first pressure signal;
measuring an exhalation inlet flow and providing a second flow signal;
measuring an exhalation pressure and providing a second pressure signal; and
controlling a flow generator based upon at least three of the first and second flow and pressure signals. - View Dependent Claims (21)
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Specification