Therapeutic gas supply installation

Abstract

Title of the Invention: Therapeutic Gas Supply System. The invention relates to a respiratory gas supply system (50) for a patient (P) comprising a gas delivery device (1), a respiratory mask (10), a gas supply line (13) for conveying the respiratory gas from the gas delivery device (1) to the mask (10), and a pressure supply line (16) for bringing the gas pressure from the mask (10) to the gas delivery device (1). A gas filtration module (40), comprising at least one filter, is arranged between the gas delivery device (1) and the gas supply line (13). A connecting device (2) establishes fluid communication between the pressure supply line (16) and the gas delivery device (1), and fastening means (24, 25) secure the connecting device (2) to the gas filtration module (13). Abstract figure: Fig. 2

Description

Title of the invention: Therapeutic gas supply installation

[0001] The invention relates to a therapeutic gas supply installation incorporating a gas delivery device that can be used to supply a therapeutic gas (i.e., pure gas or gas mixture) to a conscious patient in various care settings, particularly in hospitals, including for long-term inhalations, for example, over several hours, while minimizing gas losses.

[0002] Some therapies require the administration to people, i.e. patients, of therapeutic gases formed from a mixture of several gaseous constituents, for example nitrous oxide (N2O) and oxygen (O2) to lessen states of anxiety, produce a sedative effect and / or alleviate acute pain, or a mixture of argon (Ar) and oxygen (O2) in the case of mechanical thrombectomy following a stroke (CVA).

[0003] Sometimes, long-duration inhalations are necessary, typically from one to several hours. In this case, intermittent, i.e., non-continuous, gas delivery is therefore often preferred.

[0004] Thus, EP3981454 describes a gas delivery device, i.e., a gas supply device for a patient that limits gas consumption. This device functions as a demand valve while ensuring a low inspiratory effort for the patient to guarantee respiratory comfort. The delivery device is connected to a gas line (e.g., a flexible hose) supplying a respiratory mask. A pressure supply line (e.g., a flexible hose) also connects a pressure port on the mask to a pressure sensor located within the device. Pressure measurements are taken to improve the delivery of the therapeutic gas.

[0005] Given that the hospital environment where the patient is located is often cluttered with medical devices, the lengths of the gas supply line and the pressure supply line are generally several meters, for example, at least 4 meters. However, using such lengths creates a risk of disconnection / disconnection of these lines, which are not necessarily detected immediately by healthcare personnel.

[0006] Thus, if the gas supply line is disconnected at its connection to the delivery device, while the pressure supply line remains correctly connected, the device cannot detect a malfunction, i.e., a break in the gas supply, because pressure continues to be supplied to it by the pressure supply line. It is easy to understand that such an unexpected disconnection of the gas supply line could prove dangerous for the patient if it is not not detected quickly, because the patient no longer receives the therapeutic gas necessary for their treatment.

[0007] One problem is therefore to be able to improve a gas supply device of the type described by EP3981454, to allow rapid detection of any break in the gas supply and / or pressure supply.

[0008] One solution is based on a system for supplying respiratory gas to a patient, i.e., a person, comprising: - a gas delivery device comprising a gas outlet port for supplying breathing gas and a pressure measurement port, - a respiratory mask comprising a gas inlet and a pressure outlet, - a gas supply line to carry breathing gas from the gas outlet port of the gas delivery device to the gas inlet of the mask, and - a pressure supply line (or conduit) to bring the gas pressure from the mask pressure outlet to the pressure measuring port of the gas delivery device.

[0009] Furthermore, the gas supply installation according to the invention further comprises: - a gas filtration module comprising at least one filter, arranged between the gas outlet port of the gas delivery device and the gas supply line so that the gas from the gas outlet port passes through said gas filtration module before entering the gas supply line. - a connection device comprising a main body through which an internal passage connects the pressure supply line with the pressure measurement port of the gas delivery device, and means for fixing the connection device to the gas filtration module.

[0010] Depending on the embodiment considered, the gas supply installation of the invention may comprise one or more of the following features: - the main body of the connecting device is made of a soft material, i.e. it is flexible. - the main body is made of a flexible material with a Shore hardness greater than or equal to 60. - the flexible material is chosen from silicone materials. - the internal passage of the main body includes a passage inlet and a passage outlet, i.e. inlet and outlet orifices communicating fluidly with the gas passage, i.e. its lumen. the internal passage of the main body includes or is a channel, conduit or analog. The main body includes an upstream connector, carrying the passage inlet, configured to allow a fluidic connection of the pressure supply line (i.e., conduit, pipe, or similar). the main body also includes a downstream connector, carrying the through outlet, configured to allow a fluidic connection to the pressure measurement port of the gas delivery device. the main body of the connecting device comprises two expansions, arranged face to face and spaced apart, in particular arranged substantially parallel to each other, in particular they are symmetrical with respect to each other. the expansions form arms, wings or similar shapes. The expansions carry the means of attachment. The expansions each include a proximal end attached to the main body. The expansions each include a free distal end. The fixing means are arranged at the free distal ends of the expansions. The expansions project outwards from the main body. The expansions are formed in one piece with the main body, for example by injection molding or similar. the filtration module includes a module body comprising an internal compartment in which at least one filter is housed. The filtration module includes an upstream conduit and a downstream conduit, such as tubing, connectors or the like, arranged on either side of the module body, said upstream conduit and downstream conduit being in fluidic communication with the internal compartment. The upstream conduit (e.g., upstream connector) of the filtration module is configured to allow connection to the gas outlet port of the gas delivery device. The downstream conduit (e.g., downstream connector) of the filtration module is configured to allow connection of the gas supply line feeding the mask. The connection to the gas outlet port and / or the gas conduit is made by push-fit or similar. The fastening means include fastening openings configured to accommodate the upstream and downstream conduits of the filtration module so as to ensure the connection device, in particular its main body, coupled to the filtration module, is secured or maintained. - the fixation openings are provided at the free distal ends of the expansions, in particular through the wall of said expansions. - the upstream and downstream conduits of the filtration module are inserted within the fixing openings of the fixing means by elastic deformation of the expansions of the connection device. - the upstream and downstream conduits of the filtration module are tubular, preferably substantially cylindrical. - the module body is made of polycarbonate or similar type polymer. - The gas filtration module is sandwiched between the two expansions. and held in place by the fastening means carried by said two expansions. - the main body of the connecting device has a general U-shape. - the gas filtration module includes at least one bacteriological filter. - the pressure supply line, also called the "pressure supply duct" " constitutes a pneumatic link between the breathing mask and the pressure sensor of the gas delivery device, allowing the gas pressure to be conveyed from the mask to the pressure sensor of the gas delivery device. - the pressure supply line has a length of at least 4 m, typically about 3 to 5 m, and / or a diameter of about 2.5 to 5 mm. - the gas supply pipe has a length of at least 4 m, typically about 3 to 5 m and / or a diameter of about 20 to 25 mm. - the pressure supply line and / or the gas supply line include flexible polymer or silicone hoses. - the gas delivery device includes an internal pressure sensor configured to determine the pressure of the gas supplied by the pressure supply line. - the gas delivery device includes visual and / or audible alarm or alert means to alert the user in case of disconnection.

[0011] Depending on the embodiment considered, the gas delivery device of the installation according to the invention may comprise one or more of the following features: - it includes an internal gas circuit in fluidic communication with a valve device arranged on the internal gas circuit to control the flow of therapeutic gas circulating in the internal gas circuit. It includes a microprocessor-based control unit that drives the valve device to set or adjust the flow rate of gas passing through said valve device. It includes a pressure sensor configured to determine (i.e. measure) the gas pressure supplied by the pressure supply line, i.e., the mask pressure, and provide the control unit with one or more gas pressure measurements. The control unit is configured to compare the gas pressure measurement(s) provided by the pressure sensor to a given pressure threshold value and command the valve device to adjust the gas flow rate according to said comparison. When the control unit determines that the gas pressure measured in the mask is less than or equal to the given pressure threshold value, said control unit is configured to command the valve device to increase the flow of therapeutic gas through said valve device and supplying the internal gas circuit. the pressure threshold value is less than or equal to 0 mbar. the pressure threshold value is less than or equal to -0.25 mbar, preferably less than or equal to -0.5 mbar. The pressure threshold value is stored within the control unit. The pressure threshold value is stored by the microprocessor or by a data storage memory. The pressure threshold value is adjustable. The internal gas passage of the device includes one or more conduits, pipes or similar. The pressure sensor includes a differential pressure sensor. The pressure sensor is electrically connected to the control unit. The valve device includes a proportional valve. The pressure sensor is configured to provide the control unit with one or more gas pressure measurements, preferably several successive pressure measurements, in the form of numerical values ​​or signals representative of such numerical values ​​(e.g. voltage signals, which values ​​or signals can be processed as such or converted into numerical values ​​by the control unit. A power supply such as a power cord and mains plug (e.g., 110 / 220 V) and / or an internal battery, preferably rechargeable, provides electrical current to all components of the device that require electrical power to operate, for example the control unit, a display screen, one or more LEDs, an audible and / or visual alarm device... the control unit, at least part of the internal gas passage, the pressure sensor and / or the valve device are arranged in the housing. The pressure sensor is configured or controlled to determine the gas pressure at given time intervals, preferably every 20 msec or less, preferably every 10 msec or less, or even every 5 msec or less. The control unit is configured to operate the valve device, in particular the proportional valve, to adjust (i.e., set or modify) the gas flow rate through said valve device based on the comparison made by the control unit between the pressure measured at the mask and the predetermined pressure threshold value used as a reference pressure, in particular to increase the therapeutic gas flow rate through the valve device when the control unit determines that the gas pressure measured in the mask is less than or equal to the given pressure threshold value, where the threshold pressure is less than or equal to 0 mbar, preferably less than or equal to -0.25 mbar. The microprocessor control unit comprises one or more microprocessors, preferably one (or more) microcontrollers. The microprocessor(s) implements one or more algorithms. The control unit includes one or more data storage memories or other storage, for example, reference tables. The microprocessor control unit includes an electronic board carrying the microprocessor(s), preferably one or more microcontrollers. The gas delivery device further includes a flow meter or flow sensor arranged in the internal gas passage to measure the flow rate of gas flowing in said internal gas passage. the flow sensor (i.e. flowmeter) arranged in the internal gas passage, downstream of the valve device, in particular the proportional valve, so as to be able to measure the gas flow supplied by said valve device. The flow sensor is electrically connected to the control unit and provides it with the measurements it takes. The flow sensor is either a mass flow sensor or a differential pressure sensor. The device further includes one (or more) one-way valves arranged in the internal gas passage, particularly downstream of the deformable tank. - the device further includes a human-machine interface (HMI) comprising an information display screen, preferably a touch screen, and / or one or more selection keys or buttons, including virtual keys displayed on the touch screen, and / or a start-up device, such as an on / off or "on / off" button, and / or other elements. - the device further includes means (i.e. a system) of alarm to alert the user in case of a problem affecting the device or the gas, for example a faulty valve or sensor, an incorrect gas composition (e.g. hypoxic mixture) or others. - the alarm system may include means or a device for emitting audible and / or visual signals. - the device further includes means, i.e. a system, of disconnection alarm to alert the user of a disconnection of the main body of the connection device, in particular from the pressure value measured at the mask, in particular by analyzing it and / or comparing it to a threshold pressure value. - a disconnection (i.e. unplugging) of the main body of the connection device is detected when the pressure value measured at the mask remains below a given disconnection threshold, for a determined threshold duration. - the disconnection threshold is a pressure of the order of 0 mb relative, for example between -0.25mb and +0.25mb relative. - the threshold duration is on the order of a few seconds to a few tens of seconds, for example on the order of 5 to 30 seconds approximately. - the control unit manages the alarm means and / or the disconnection alarm means.

[0012] Depending on the embodiment considered, the therapeutic gas supply installation according to the invention may further comprise one or more of the following additional features: - a respiratory mask is a face mask (i.e. naso-oral) covering the nose and mouth of the patient, in use, that is, when it is worn by said patient. - it further includes a therapeutic gas source fluidly connected to the internal gas passage to supply said gas passage with therapeutic gas. - the therapeutic gas source includes one or more gas containers, including cylinders. - the therapeutic gas source includes a gas container containing an O2 / N2O gas mixture, preferably an equimolar mixture of O2 / N2O (i.e. 50 mol.% / 50 mol.%). - alternatively, the therapeutic gas source comprises a gas container containing an O2 / argon gas mixture, preferably containing 35 to 45% vol.% O2 and 55 to 65% vol.% Ar. - alternatively, the therapeutic gas source comprises a first gas container containing argon or N2O, a second gas container containing oxygen (O2) and a gas mixer supplied with gas from said first and second gas containers, said mixer operating a mixture of the gases from the first and second gas containers to obtain an O2 / N2O or O2 / argon gas mixture. - the breathing mask is in fluidic communication with the internal gas passage of the gas delivery device and supplied with therapeutic gas by said internal gas passage.

[0013] Within the scope of the invention: - the term "pressure" is used to generally refer to a positive pressure (> 0 bar), zero (= 0 bar) or negative pressure (< 0 bar), that is to say a depression. - pressures are expressed in relative bar or mbar. - The minus sign "-" before a pressure value means that the pressure is negative, that is to say that it is a depression, i.e. a pressure lower than atmospheric pressure. - The sign “+” in front of a pressure value means that the pressure is positive, i.e. a pressure greater than atmospheric pressure. - the terms "therapeutic gas" or "respiratory gas" are considered equivalent and refer to a gas with one or more constituents or gaseous compounds, i.e. a 'pure' gas or a gaseous mixture. - the terms "devices", "means", "system", "unit" or similar, are considered equivalent and interchangeable. - The terms "control", "command", "piloting" or similar, are considered equivalent and interchangeable. - the terms "line", "conduit", "pipeline" and "pipe" are considered equivalent and interchangeable.

[0014] The invention will now be better understood with reference to the following detailed description, given by way of illustration but not limitation, with reference to the accompanying figures, among which:

[0015] [Fig.1] schematically illustrates an embodiment of a gas supply installation comprising a gas delivery device for supplying a respiratory gas to a patient.

[0016] [Fig.2] schematically illustrates an embodiment of a connection device and a gas filtration module of a gas supply installation according to the invention.

[0017] [Fig.3] is analogous to [Fig.2].

[0018] [Fig.4] is a cross-sectional view of the connection device of [Fig.2] and [Fig.3].

[0019] [Fig. 1] is a schematic representation of an embodiment of a gas supply installation 1 as described by EP3981454.

[0020] It includes a gas delivery apparatus 1 comprising an external housing 2 forming a rigid casing, for example made of polymer, comprising the internal components, in particular an internal gas circuit, a deformable reservoir, a valve device and a microprocessor control unit, as detailed by EP3981454 to which reference may be made for further details.

[0021] A therapeutic gas source 3, such as a gas cylinder 30 equipped with a valve 31, supplies a therapeutic gas, i.e. a gas or gas mixture, to the gas delivery device 1 via a connecting hose 32, connected to the inlet port 33 of the gas delivery device 1.

[0022] The gas source 3 contains a pressurized therapeutic gas, for example an argon / oxygen mixture, for example comprising 60 vol.% argon and 40 vol.% oxygen, at a maximum pressure of approximately 250 bar. The valve 31 is preferably a valve with an integrated pressure regulator or RDI delivering the gas into the connecting hose 32 at a reduced pressure, for example, of approximately 5 bar. The integrated pressure regulator 31 is preferably protected by a rigid cap (not shown).

[0023] The therapeutic gas passes through the gas delivery device 1, as explained by EP3981454, and is then delivered to a patient P via a gas supply line 13 which is fluidly connected to an outlet port 14 of the device 1. The gas is supplied to the patient via an interface or breathing mask 10 supplied by the gas supply line 13, typically a flexible polymer hose, such as the patient circuit marketed by Intersurgical® under reference 157400.

[0024] Preferably, the respiratory interface or mask 10 is a face mask, i.e., a naso-oral mask, covering the patient's mouth and nose. Other respiratory interfaces could, of course, be suitable.

[0025] The respiratory mask 10 has an inhalation port or orifice, also called a gas inlet 12, and an exhalation port or orifice 11, also called a gas outlet. The gas inlet 12 of the mask 10 is fluidly connected to the pipe gas supply 13 which carries the breathing gas from the device 1 and supplies the mask 10 with this breathing gas.

[0026] Furthermore, the expiration port 11 allows the evacuation to the atmosphere of gases during the patient's expiration, i.e. exhaled gases rich in CO2, and also prevents the entry of ambient air into the mask 10 when the patient inhales the therapeutic gas, i.e. during his inspiratory phases.

[0027] The mask 10 further has a pressure tapping port, called pressure outlet 15, fluidly connected to a pressure supply line 16, also called "pressure supply line", such as a flexible hose, for example a silicone hose, itself pneumatically connected to a pressure sensor (not shown) arranged in the device 1, via a pressure measuring port 17 arranged on the housing 2 of the gas delivery device 1, so as to be able to perform measurements of the pressure prevailing in the mask 10. The pressure supply line 16 thus forms a pneumatic link between the breathing mask 10 and the internal pressure sensor of the gas delivery device 1, allowing the gas pressure taken from the mask 10 to be conveyed so that the pressure sensor can determine its pressure level.

[0028] The internal architecture of the gas delivery device 1 of [Fig.1] and its operation being here identical in every respect to those described by EP3981454, they are not detailed below and it is sufficient to refer to this document for details.

[0029] The present invention aims to improve gas supply installations 50 of the type illustrated in [Fig.1] and described by EP3981454.

[0030] Indeed, as already explained, the length of the gas supply line 13 and the pressure supply line 16 must be several meters, typically at least about 4 meters, in order to take into account the frequent congestion of treatment rooms, bedrooms or other hospital premises.

[0031] However, such lengths of conduits of several meters can cause untimely disconnections or unplugging of one and / or the other of these conduits or lines 13, 16, in particular the gas supply line 13, which are not necessarily detected immediately by the care staff, which then presents a risk for the patients.

[0032] Typically, if the gas supply line 13 is disconnected at its connection (at 14) to the delivery device 1 illustrated in [Fig. 1], while the pressure supply line 16 remains correctly connected (at 17) to the device 1, this untimely disconnection cannot immediately detect the device 1 because pressure continues to be supplied to it by the pressure supply line. 16, which causes device 1 to continue to operate (i.e. deliver gas) when in reality the patient is no longer receiving gas.

[0033] In the context of the present invention, the aim is to solve this problem of non-detection of one or the other of these pipes or lines 13, 16, in particular of the gas supply pipe 13.

[0034] To do this, an assembly 2, 40 is interposed between the device 1 and the pipes or lines 13, 16, comprising a connection device 2 mechanically coupled to a gas filtration module 40 comprising an internal filter (or filters), typically a bacteriological filter, to which the gas delivery device 1 and, furthermore, the gas supply line 13 and the pressure supply line 16 are connected, as illustrated in [Fig.2] and [Fig.3].

[0035] In other words, the invention relates to a gas supply installation 50, which, for the sake of simplification, is considered to be identical to that illustrated for example in [Fig.1] and described by EP3981454, which also includes the assembly 2, 40 comprising the connection device 2 and the gas filtration module 40 mechanically coupled to each other, as schematically shown in [Fig.2] and [Fig.3].

[0036] More specifically, the connection device 2 comprises a main body 22 through which an internal passage 222, i.e. conduit, channel or similar, as detailed in [Fig.4], fluidly connecting the pressure supply line 16 to the pressure measuring port 17 of the gas delivery device 1 so as to ensure transmission of the pressure measured at the mask 10, to the internal pressure sensor of the device 1, which is used to measure or determine the pressure of the gas taken from the mask 10, brought through the pressure supply line 16 and entering the device 1 through the pressure measuring port 17.

[0037] The main body 22 of the connecting device 2 is made of a soft, i.e. flexible, but robust material preferably having a Shore hardness greater than or equal to 60, typically a silicone-type material.

[0038] The internal passage 222, i.e. channel or similar, passing through the main body 22 of the connecting device 2 includes a passage inlet 22.1 and a passage outlet 22.2, i.e. inlet and outlet ports communicating fluidly with the gas passage 222, i.e. its lumen.

[0039] Preferably, the main body 22 includes an upstream connector 21, carrying the passage inlet 22.1, configured to allow a fluidic connection of the pressure supply line 16 bringing the gas pressure taken from the mask 10, and furthermore a downstream connector 23, carrying the passage outlet 22.2, and configured to allow a fluidic connection to the pressure measuring port 17 of the gas delivery device 1.

[0040] Advantageously, the upstream connector 21 and / or the downstream connector 23, also called "fittings" or similar, have generally frustoconical or cylindrical shapes so as to be able to be connected by push-fit or similar, to the pressure supply line 16 and the pressure measuring port 17, as illustrated in [Fig.3].

[0041] Furthermore, the connection device 2, typically the main body 22, also includes fastening means 24, 25 allowing the connection device 2 to be secured, that is to say, fixed to the gas filtration module 131.

[0042] In the proposed embodiment, the main body 22 of the connecting device 2 has a general U-shape or similar. It comprises two expansions 124, 125, arranged facing each other and spaced apart, in particular arranged substantially parallel to each other. Preferably, they are symmetrical with respect to each other.

[0043] When the main body 22 has, as here, a general "U" shape, the two expansions 24, 25 schematically constitute the two vertical branches of the "U".

[0044] Generally, the expansions 124, 125 form arms, wings or the like projecting away from the main body 22. They carry the fastening means 24, 25. More precisely, the two expansions 124, 125 each comprise a proximal end fixed to the main body and a free distal end 124.1, 125.1. The fastening means 24, 25 are arranged at the free distal ends 124.1, 125.1 of the expansions 124, 125.

[0045] Advantageously, the two expansions 124, 125 are formed in one piece with the main body 22, for example by injection molding or similar.

[0046] The distance between these two expansions 124, 125 corresponds approximately to the width of the body 41 of the filtration module 40 so as to be able to take it in "sandwich", as seen on [Fig.2] and [Fig.3] and detailed below.

[0047] More specifically, the filtration module 40 includes a module body 41, for example made of polymer, comprising an internal compartment or chamber where one (or more) filters are housed / arranged, typically a bacteriological filter, such as the one marketed by Intersurgical® under reference 169000, used to purify the gas which passes through the module 40 towards patient P, in particular to eliminate microorganisms that may be present, i.e. bacteria or others.

[0048] The filtration module 40 comprises an upstream connector 42 and a downstream connector 43, such as pipes, fittings or the like, arranged on either side of the module body 41, said upstream and downstream connectors 42, 43 being in fluidic communication with the internal compartment of the module body 4L

[0049] The upstream connector 42 is configured to allow a direct or indirect connection to the gas outlet port 14 of the gas delivery device 1, while the downstream connector 43 is configured to allow a connection to the pipe gas supply 13 supplying the mask 10, preferably push-fit connections.

[0050] As seen in [Fig.2] to [Fig.4], the fastening means 24, 25 include fastening openings 46 (in [Fig.4]) passing through the wall of the two expansions 124, 125, at the level of the free distal ends 124.1, 125.1 of the expansions 124, 125, and serving to house the upstream and downstream connectors 42, 43 of the filtration module 40 so as to ensure a securing or maintenance of the connection device 2, in particular of its main body 22, coupled to the filtration module 40.

[0051] Since the main body 22 of the connection device 2 is made of a flexible material, e.g. silicone or similar, the upstream and downstream connectors 42, 43 of the filtration module 40 can be easily inserted into the fixing openings 46 by elastic deformation of the expansions 124, 125 of the connection device 2. The upstream and downstream connectors 42, 43 therefore pass through the fixing openings 46.

[0052] The upstream and downstream connectors 42, 43 of the filtration module are substantially tubular, typically cylindrical, and have, for example, a length on the order of a few cm.

[0053] In other words, the gas filtration module 40 is sandwiched between the two expansions 124, 125 of the connection device 2 and held there by the fixing means 24, 24 carried by said two expansions 124, 125.

[0054] According to the invention, arranging the assembly 2, 40, formed by the connection device 2 and the gas filtration module 40, which are mechanically coupled to each other, between the gas supply line 13 and the pressure measuring line 16, between the gas delivery device 1 and, moreover, the gas supply line 13 and the pressure measuring line 16, does not prevent untimely disconnections which may occur, but if a disconnection of the gas supply line 13 from the outlet port 14 occurs, it will cause a simultaneous disconnection of the pressure supply line 13 from the measuring port 17, which will interrupt the supply of pressure to the device 1.

[0055] Consequently, the pressure level in the mask 10 can no longer be measured by the pressure sensor of the device 1, and the latter is configured to trigger an audible and / or visual alarm. To this end, the control unit that analyzes the pressure measurement in the mask 10 can determine that this pressure remains below a predetermined disconnection pressure threshold, for example, a threshold below 0.25 mb relative for a given duration, for example, for 10 consecutive seconds.

[0056] In other words, any disconnection can be immediately detected and reported to the user, i.e. the nursing staff, who can then intervene and perform a fluid reconnection of the disconnected elements.

[0057] The coupling of the connection device 2 to the filtration module 40 is better represented in Fig. [3] where it can be seen that the upstream connector 42 (i.e. small tubular conduit) of the filtration module 40 is inserted into the output port 14 of the device 1, typically fixed by push-fit.

[0058] The mechanical rigidity conferred by the expansions 124, 125 of the fixing means 24, 25 of the connection device 2, in particular the terminal part of the upstream expansion 124 which is in compression on the external surface of the body 41 of the filtration module 40, forces the downstream connector 23 carrying the passage outlet 22.2 to come into contact with the pressure measurement port 17, typically by mechanical interlocking, and thus achieve a fluidic communication, via the internal passage or channel 22, to the pressure supply line 16.

[0059] In the event of traction on the filtration module 40, in the direction of its disconnection (arrow F in [Fig.3]) from the gas delivery device 1, for example due to an untimely pull on the gas supply line 13 which is of great length (>4 m approx.), any disconnection or dislodging of the upstream connector 42 from the output port 14 of the device 1 will be accompanied by a simultaneous disconnection or dislodging of the downstream connector 23 from the pressure measurement port 17, making this disconnection detectable by the gas delivery device 1 and warning the user of this disconnection by means of alarm which then trigger visual and / or audible signals.

[0060] Generally speaking, although the preceding description was given, for illustrative purposes only, in connection with the gas supply installation 1 described by EP3981454 and schematically represented in [Fig. 1], it obviously applies to any gas supply device of the same type, that is to say, to any gas delivery device or equipment 1 equipped with a gas outlet port 14 for supplying a breathing gas to a patient via a gas line 13 supplying a breathing interface of the mask type 10 or similar, and a pressure measurement port 17 allowing the connection of a pressure measurement line 16 linked to said breathing interface of the mask type 10 in order to draw the gas pressure therein and bring it to an internal pressure sensor of the device 1, and where the same problem of untimely disconnection of long pipes or lines 13, 16 exists, i.e., of at least Approximately 4m.

Claims

Demands

1. A respiratory gas supply installation (50) for a patient (P) comprising: - a gas delivery device (1) including a gas outlet port (14) for supplying respiratory gas and a pressure measurement port (17), - a respiratory mask (10) including a gas inlet (12) and a pressure outlet (15), - a gas supply line (13) for conveying respiratory gas from the gas outlet port (14) of the gas delivery device (1) to the gas inlet (12) of the mask (10), and - a pressure supply line (16) for bringing gas pressure from the pressure outlet (15) of the mask (10) to the pressure measurement port (17) of the gas delivery device (1), characterized in that it further comprises: - a gas filtration module (40) including at least one filter,arranged between the gas outlet port (14) of the gas delivery device (1) and the gas supply line (13) such that the gas from the gas outlet port (14) passes through said gas filtration module (40) before entering the gas supply line (13), and - a connection device (2) comprising a main body (22) through which an internal passage (222) is traversed, establishing fluid communication between the pressure supply line (16) and the pressure measuring port (17) of the gas delivery device (1), and fastening means (24, 25) for securing the connection device (2) to the gas filtration module (131).

2. Installation according to claim 1, characterized in that the main body (22) is made of a flexible material having a Shore hardness greater than or equal to 60, preferably the flexible material is chosen from silicone materials.

3. Installation according to claim 2, characterized in that the gas supply line (13) and the pressure supply line (16) have a length of at least 4 meters.

4. Installation according to claim 1, characterized in that the internal passage (222) of the main body (22) comprises a passage inlet (22.1) and a passage outlet (22.2).

5. Installation according to claim 4, characterized in that the main body (22) comprises: - an upstream connector (21), carrying the passage inlet (22.1), configured to allow a fluidic connection of the pressure supply line (16) and - a downstream connector (23), carrying the passage outlet (22.2), configured to allow a fluidic connection to the pressure measuring port (17) of the gas delivery device (1).

6. Installation according to any one of the preceding claims, characterized in that the main body (22) of the connecting device (2) comprises two expansions (124, 125), arranged face to face and spaced apart from each other, said expansions (124, 125) carrying the fixing means (24, 25).

7. Installation according to claims 1 and 6, characterized in that the gas filtration module (40) is sandwiched between the two expansions (124, 125) and held by the fastening means (24, 25) carried by said two expansions (124, 125).

8. Installation according to any one of the preceding claims, characterized in that the main body (22) of the connecting device (2) has a general U-shape.

9. Installation according to claim 1, characterized in that the gas delivery device (1) includes an internal pressure sensor configured to determine the pressure of the gas supplied by the pressure supply line (16).

10. Installation according to claim 1, characterized in that the device further comprises disconnection alarm means to alert the user of a disconnection of the main body of the connection device.

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