Breathing aid device
First Claim
1. Breathing aid device of the type with inspiration under substantially constant pressure, comprising a patient circuit (1) having an inspiratory branch (11) connected to a pressurized inspiratory flow source (3) and an expiratory branch (4) in which is installed an expiration valve (VE) which is controlled so as to be closed during inspiration, the device also comprising electronic control (12) connected to at least one sensor (18, 19) detecting the respiratory activity of the patient and distribution means (VI) which in inspiratory phase establish the communication between the inspiratory flow source (11) and the inspiratory branch (3) of the patient circuit, and in expiratory phase interrupt this communication at least partially, characterized in that the distribution means (VI) are controlled by the driving means (12), which control the interruption of the said communication when the sensor detects that the patient is preparing an expiratory phase, and in that the driving means (12) also control, at least indirectly, the expiration valve (VE) in order that it determines a predefined expiratory pressure substantially independent of the operating state of the inspiratory flow source (11).
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Accused Products
Abstract
A patient circuit (1) comprises an inspiratory branch (3) connected to an inspiratory flow rate source (11), and an expiratory branch (4) connected to the atmosphere through an expiratory valve (VE). An inspiratory valve (VI) is arranged between the inspiratory flow rate source (11) and the inspiratory branch (3). During inspiration, the inspiration valve (VI) is open and the pressure of the inspiratory flow source is applied to the expiration valve (VI) to close the latter. During expiration, the inspiration valve (VI) is closed, and the control inlet (6) for controlling the expiration valve (VI) is connected through a control valve (VC1) to a low pressure source (14) adjustable in a range including the zero value. The patient breathes as desired under atmospheric pressure or under positive expiratory pressure. Utilization for making a simple apparatus which provides for multiple adjustments, and compatible with its utilization at home.
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Citations
68 Claims
- 1. Breathing aid device of the type with inspiration under substantially constant pressure, comprising a patient circuit (1) having an inspiratory branch (11) connected to a pressurized inspiratory flow source (3) and an expiratory branch (4) in which is installed an expiration valve (VE) which is controlled so as to be closed during inspiration, the device also comprising electronic control (12) connected to at least one sensor (18, 19) detecting the respiratory activity of the patient and distribution means (VI) which in inspiratory phase establish the communication between the inspiratory flow source (11) and the inspiratory branch (3) of the patient circuit, and in expiratory phase interrupt this communication at least partially, characterized in that the distribution means (VI) are controlled by the driving means (12), which control the interruption of the said communication when the sensor detects that the patient is preparing an expiratory phase, and in that the driving means (12) also control, at least indirectly, the expiration valve (VE) in order that it determines a predefined expiratory pressure substantially independent of the operating state of the inspiratory flow source (11).
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4. A breathing aid device for a patient adapted to provide inspiration under substantially constant inspiratory pressure, said device comprising
a patient circuit (1) having an inspiratory branch (3) connected to an outlet of a pressurized inspiratory flow source (11) and an expiratory branch (4), a sensor control connected to at least one sensor which is adapted to detect respiratory activity of said patient, a distribution element (VI) controlled by said sensor control to establish communication between said pressurized source (11) and said inspiratory branch (3) during inspiration by said patient and having means to at least partially interrupt said communication when said patient is about to begin expiration, and an expiration valve 617 (VE) in said expiration branch controlled by said sensor control to be closed during said inspiration and having means to determine, during said expiration, a predefined expiratory pressure substantially independently of said said pressurized source (11).
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21. A breathing aid device for a patient of the type with inspiration under substantially constant inspiration pressure comprising
a patient circuit (1) having an inspiratory branch (3) connected to a pressurized inspiratory flow source (11) and an expiratory branch (4), a sensor control (12) connected to at least one sensor (18, 19) which is adapted to detect respiratory activity of said patient, a distribution element (VI) controlled by said sensor control to establish communication between said inspiratory flow source (11) and said inspiratory branch (3) of the patient circuit during inspiration phase and to interrupt said communication at least partially when said patient is about to begin said expiration, and an expiration valve (VE) mounted in said expiratory branch and at least indirectly controlled by said sensor control to be closed during inspiration and to determine during expiration a predefined expiratory pressure substantially independent of the operating state of the inspiratory flow source (11), wherein said distribution element comprises a pneumatically controlled inspiration valve, a control inlet which is connected selectively to the outlet of the inspiratory flow source during expiration and to a lower pressure during inspiration.
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39. A breathing aid device for a patient of the type with inspiration under substantially constant inspiration pressure comprising
a patient circuit (1) having an inspiratory branch (3) connected to a pressurized inspiratory flow source (11) and an expiratory branch (4), a sensor control (12) connected to at least one sensor (18, 19) which is adapted to detect respiratory activity of the patient, a distribution element (V1) controlled by said sensor control to establish communication between the inspiratory flow source (11) and the inspiratory branch (3) of the patient circuit during inspiration and to interrupt this communication at least partially, when said patient is about to begin said expiration, and an expiration valve (VE) mounted in said expiratory branch and at least indirectly controlled by said sensor control to be closed during inspiration and to determine during expiration a predefined expiratory pressure substantially independent of the operating state of the inspiratory flow source (11), wherein said distribution element is by-passed by a loop (53, 54) having a restriction (52) and, downstream from this restriction, having a supplementary gate valve (VR) adapted to be closed during inspiration and to maintain in said loop and downstream from said restriction (52), during expiration, a pressure close to the predefined expiratory pressure (PEP).
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55. A breathing aid device for a patient of the type with inspiration under substantially constant inspiration pressure, comprising
a patient circuit (1) having an inspiratory branch (11) connected to a pressurized inspiratory flow source (3) and an expiratory branch (4), a sensor control (12) connected to at least one sensor (18, 19) which is adapted to detect respiratory activity of the patient, a distribution element (VI) controlled by said sensor control to establish communication between the inspiratory flow source (11) and the inspiratory branch (3) of the patient circuit during inspiration and to interrupt this communication at least partially, when said patient is about to begin said expiration, and a pneumatically controlled expiration valve (VE) mounted in said expiratory branch and at least indirectly controlled by said sensor control to be closed during inspiration and to determine during expiration a predefined expiratory pressure substantially independent of the operating state of the inspiratory flow source (11), wherein to control the expiration valve (VE), the sensor control controls a three-way gate valve (VC1) installed in a control circuit (7) of the expiration valve (VE) to connect a control inlet (6) of the expiration valve to a low pressure source (14) when the patient is breathing out, and to the pressurized flow source (11) when the patient is breathing in.
Specification