Abstract: An HME Filter is provided having with an integral housing having minimal components which eliminating components at the circuit “Y” connector. A closed circuit gas flow is maintained whether an internal filter material is or is not engaged, and with or without a nebulizer aerosolizing medications. The HME SHUTTLE continues to maintain the same closed circuit gas flow during the HME filter materials insertion into the HME SHUTTLE, throughout the course of the HME filter's use in the closed gas flow circuit and during the HME filter materials removal from the HME SHUTTLE. The placement for optimal patient care is to be located between the connection of inhalation and exhalation sides of mechanical ventilator circuit and endotracheal tube of an intubated patient. The HME SHUTTLE also accommodates the docking port for the use of an external nebulizer.

Abstract: A heat and moisture exchange unit for use with a patient breathing circuit. The unit includes a housing, an MDI port assembly and a heat and moisturizing medium. The housing forms a patient-side port, a ventilator-side port, and a containment region between the patient-side port and the ventilator-side port. The MDI port assembly includes a frame projecting into the containment region and configured to receive a portion of a metered dose dispenser. The frame terminates at an outlet end, forming a flow passage. The heat and moisturizing medium is maintained within the containment region so as to define a medium face most proximate the outlet end of the MDI port assembly. The unit is characterized by the absence of a body between the outlet end and the medium face.

Abstract: A filter and/or HME device including an upper shell suitable to be connected to ventilation means, a lower shell suitable to be connected to a tracheal or tracheostomy tube of a patient, a filter and/or HME element disposed between the upper shell and the lower shell and a condensation screen disposed in front of the filter and/or HME element and facing the lower shell wherein the condensation screen has a conical wall extending from the opposite part of the filter and/or HME element to produce, together with a portion of the lower shell a collection chamber for the condensation that forms.

Abstract: A heat and moisture exchanger configured to be located between a respiratory system of a patient and an anesthesia circuit connected to an anesthesia apparatus, or a respiratory circuit connected to a respirator for maintaining a temperature and humidity of an aspired gas required to a patient under anesthesia or artificial respiration comprises a heat storage carrier material, and a moisture absorption and release material added to the heat storage carrier material. In the heat and moisture exchanger, at least one of density of the heat storage carrier material, number of cells of the heat storage carrier material, and an added amount of the moisture absorption and release material in the heat storage carrier material is set to decrease from the patient side to the side of the anesthesia apparatus or the respirator, along a flow direction of a respiratory gas in the heat storage carrier material.

Abstract: A heat and moisture exchange (HME) unit including a housing, a heat and moisture retaining media (HM media), and a valve mechanism. The housing forms an intermediate section extending between two ports, and defining first and second flow paths. The HM media is maintained along the first flow path. The valve mechanism includes an obstruction member movably retained within the housing and transitionable between opposing, first and second maximum points of travel. At the first maximum point of travel, the obstruction member closes the second flow path to permit airflow through only the first flow path. At the second maximum point of travel, the obstruction member permits airflow through both of the first and second flow paths. The HME unit is simple to use, yet provides an effective bypass state in which airflow freely progresses around the HM media.

Abstract: A heat and moisture exchange (HME) unit including a housing, a heat and moisture retaining media (HM media), and a resistance indicator. The housing forms a first port, a second port, and an intermediate section. The intermediate section extends between the first and second ports, and defines a flow path fluidly connecting the first and second ports. The HM media is maintained within the intermediate section along the flow path. The resistance indicator is carried by the housing and is fluidly connected to the first port. In this regard, a visual appearance of the resistance indicator changes as a function of pressure within the housing to visually alert a caregiver as to possible existence of an excessive pressure differential condition within the HME unit.

Abstract: An HME unit including a housing, an HM media, and a check valve assembly. The housing forms a first port, a second port, and an intermediate section defining first and second flow paths fluidly connecting the first and second ports. The HM media is maintained within the intermediate section along the second flow path. The check valve assembly includes an obstruction member movably positioned within the intermediate section to selectively provide opened and closed positions. In the opened position, the first flow path is open relative to the obstruction member. In the closed position, the obstruction member closes the first flow path. In one mode, the obstruction member transitions to the opened position in response to gas flow in a flow direction from the second port toward the first port, and transitions to the closed position in response to gas flow in an opposite flow direction.

Abstract: The present apparatus includes a metered dose inhaler (MDI) portion housed with a heat and moisture exchanger (HME) portion. The MDI portion and the HME portion share an inlet. The MDI portion and the HME portion share an outlet. The MDI portion and the HME portion are in parallel to each other and are immediately lateral of one another. The present MDI/HME apparatus includes a valve to direct fluid flow to or away from the HME portion and to or away from the MDI portion. The present MDI/HME apparatus includes a valve arm to communicate to the caregiver whether fluid is passing through the MDI portion or the HME portion and to structurally close off an MDI port when the valve is open relative to the HME portion. The valve is structured such that fluid flow to the patient is never obstructed.

Abstract: A filter assembly for use in sidestream gas sampling assembly. The filter assembly of the present invention includes a hydrophilic member that is constructed from a porous material and is situated such that gas entering the filter assembly passes through at least a portion the hydrophilic member. In a further embodiment, the filter includes a hydrophobic member positioned downstream of the hydrophilic member. The hydrophobic member acts as a second line of defense against moisture reaching the sensing mechanism in the gas sampling assembly.

Abstract: A heat and moisture exchange device for being selectively operated between HME mode and bypass mode comprises a rotatable valve and valve selector configured to be rotated without transferring rotational movement to tubing attached to the device.

Abstract: A breathing circuit for use with a ventilated patient that includes a heat exchanger for removing water vapor from the breathing gases to prevent condensation within the breathing circuit. The heat exchanger is positioned downstream from the CO2 absorber and receives the breathing gases from the CO2 absorber prior to delivery of the breathing gases to the inspiration limb of the patient circuit. The heat exchanger includes a plurality of inflow tubes and outflow tubes that are each open to a sump removably attached to the heat exchanger. The sump collects the water vapor condensed from the breathing gases within the heat exchanger.

Abstract: An HME has a generally T-shape housing (1) with a central, laterally-extending port (2) for connecting to the machine end of a patient breathing tube (3) or mask. The housing (1) extends to either side of the port (2) and is curved to follow the shape of the patient's neck. Hygroscopic HME paper elements (4) are retained at opposite ends of the housing (1) so that all gas flowing to or from the tube via the HME passes through one or other of these elements. The housing (1) has a suction aperture (60) located directly opposite the port (2).

Abstract: A heat and moisture exchanger (HME) adaptor for a closed suction catheter assembly having one end in communication with a closed suction catheter assembly and another end configured to rotationally engage and releasably hold the HME is disclosed herein. The adaptor may include a retainer having an aperture that engages projections on the HME to releasably secure the adaptor to the HME. The adaptor may include a retaining ring that may be deformed or rotated to engage or disengage projections on the HME. The adaptor may be used with extended use closed suction catheter assemblies.

Abstract: There is provided a moisture indicator for a heat and moisture exchange (HME) device that uses a pre-colorant and an activator applied to an inner surface of the HME device. The colorant undergoes a color change of Delta E (?E) of equal to or greater than 3 units upon exposure to moisture but not upon exposure to high humidity. The colorant is visually obvious to the unaided human eye under normal light conditions through the body of the device. The HME device with the visual indicator for moisture can indicate to the care-giver that it is time to change the HME device.

Abstract: A respiratory gas conditioning system and method are provided and includes an inhale branch (IB), an exhale branch (EB), a low-dead-space heat and moisture exchanger (HME), and a connector (70) for connecting the branches (IB, EB) to a patient (PZ) wherein the HME is located close to a ventilator; and a water reservoir (RS) is located upstream from the HME to moisture-enrich the gas exhaled by the patient (PZ) as it flows along the exhale branch (EB).

Abstract: An HME (heat and moisture exchanger) (10) having a septum (or filter) (15) formed by pleating a sheet (150) of material capable of retaining and releasing heat and moisture. The HME (10) is characterized in that walls (15a, 15b, 15c) of the septum (or filter) (15) are coated partly or completely with sealing material to define at least two exposed areas (A1, A2) through which inhaled gas (F1) and exhaled gas (F2) flow respectively. Moreover, each sheet (150) of material is divided into identical units (150a) “fan-folded”, in use, one on top of another to form a first set of passages (150b) through which only the inhaled gas (F1) flows, and a second set of passages (150c) through which only the exhaled gas (F2) flows.

Abstract: A humidifier system for heating and humidifying respiratory gases has a housing with an inner chamber, a first port at the first end for connection to a ventilator breathing circuit and a second port at the second end for connection to a patient to supply respiratory gases to the patient and to receive exhaled gases from the patient. A body of heat moisture exchange (HME) material is located within the chamber, and a water permeable device is also located within the chamber. The housing has a water refill inlet communicating with the water permeable device. A water supply outside the housing is connected to the water refill inlet to supply water to the water permeable device. A heater mounted outside the housing supplies heat to the housing and maintains the housing at a selected temperature.

Abstract: A heat and moisture exchanger for both conducting a stream of air produced by a ventilator to a moisturizing medium and internally bypassing the moisturizing medium if aerosolized medication is introduced into the stream includes a housing having a ventilator-side port coupled to an outlet of a ventilator and a source of aerosolized medication. The housing has a patient-side port for coupling to a patient to provide ventilation including either air or air carrying aerosolized medication. A first path conducts air from the ventilator-side port through the moisturizing medium and the patient-side port, and a second path conducts air carrying aerosolized medication from the ventilator-side port directly to the patient-side port. A two-way valve mechanism in the housing selectively couples the ventilator-side port into fluid communication with one or the other of the first and second paths.

Abstract: A device for conditioning breathing air includes a housing (1) provided with an inlet (5) for non treated breathing air and an outlet (6) for the treated breathing air. The housing (1) contains a passive humidifier (7) and an active humidifier wherein the active humidifier includes a water supply inlet (13), a heating device for the supplied water, a membrane (12) having substantial water impermeable and water vapor permeable characteristics, and a heat exchange element (14). The membrane (12) is divided into a hydrophilic membrane (12a) and a water vapor permeable and water impermeable membrane (12b). The heat exchange element is a perforated metal plate (14) and/or a heating resistance. A method for the conditioning of breathing air includes the steps of: supplying through the inlet opening non treated breathing air, passively humidifying the supplied air through the passive humidifier, and actively humidifying the breathing air, through the active humidifier of a device.

Abstract: The present invention relates to a breathing-speaking valve intended to be used as a speaking valve of patients requiring filtration of inspiration air inhaled via tracheostomas and are mounted on a tracheal tube, which breathing-speaking valve includes a valve housing (1) inended to be attached to the tracheal tube and which comprises a check valve in the form of a membrane (10), which check valve opens when the patient inhales and closes at expiration and filter (7) for filtration of the inspiration air, which filter is located within this membrane, and optional, a nipple (6) for connection to a oxygen apparatus for oxygen delivery to the inspiration air whereby the filter (7) is laying against a number of ribs (5) located in the bottom (2) of the valve housing (1) and a nipple (6) for connection to a oxygen apparatus is mounted substantially perpendicular to the longitudinal direction of the valve housing (1) by the bottom of the valve housing (1), and said nipple (6) opens into the space (14) defined by t

Abstract: An apparatus for supplying a respiratory gas includes a blowing device for delivering the respiratory gas, a housing device having a bottom region, a top surface region and a side region extending upwardly between the top surface region and the cover region, as well as a connecting device for connecting a humidifying apparatus. The connecting device is arranged in the side region of the apparatus in such a way that the humidifying apparatus can be laterally coupled thereto. The humidifying apparatus may include a partial amount discharge device for passing a partial amount of the liquid pre-stored in a liquid storage space into a humidifying region. A respiration tube includes a connecting plug structure which has both a respiratory gas connecting portion and a pressure measuring tube connecting portion.

Abstract: A first and second housing is joined together by a middle housing rotatable with respect to the first and second housing. The first and second housings have conduits passing through exterior walls and an annular ring on an inside wall together with an annular interior edge rotatably joined to first and second side rim channels of the middle housing. A heat-moisture exchanger material having an annular opening through which a tube passes is mounted within the middle housing so that in a first rotatable position air and moisture passes through the first and second housing conduits directly and in a second rotatable position must pass through the heat-moisture exchange material.

Abstract: A humidifier having a heat-generating composition for generating steam is disclosed. The humidifier is permitted to fit the face, keeping the humidity high at a space between the face and the humidifier for many hours. A central non heat-generating belt, which functions as a flexible belt, is provided between inner heat-generating regions containing heat-generating composition. Lateral non heat-generating belts, which function as a flexible belt, are provided between the inner heat-generating regions and outer heat-generating regions. The humidifier fits the face by deforming the flexible belts. Thus, the face is kept moisturized by steam discharged from the inner heat-generating regions and the outer heat-generating regions.

Abstract: A device for the dosing of a dry additive gas into a breathing gas in a ventilator system, the ventilator system including a tubing system connectable by at a distal end to a patient, and has a dosing tube connectable to the tubing system for dosing to the distal end of the tubing system. The dosing tube is composed of a tube section having a moisture permeable contact surface, adapted to interact with moisture from exhaled breathing gas, so the dry additive gas is humidified before dosing to the distal end of the tubing system.

Abstract: The present invention provides a heat and moisture exchange (HME) unit that includes a housing having a fibrous media in the housing that is designed to absorb and retain moisture and heat from exhaled air passing through the housing. The HME unit is designed to transfer the moisture and heat to inhaled air passing through the HME unit. The HME unit has an internal bypass in the housing to enable air to pass through the heat HME unit without passing through the fibrous media. The present invention also provides a breathing circuit that includes a medication bypass HME unit, a medication treatment device and a ventilator that is connected in a closed system.

Abstract: A device for passive humidification of tracheostomized or intubated patients, comprising an outer body which forms an opening for connection to the patient and is connected to at least one seat of a filtering element which is connected to the outside, the device further comprising, on the outer body, a coupling for connection to at least one oxygen delivery duct which ends proximate to the outer part of the filtering element.

Abstract: The invention refers to a device for collecting liquid from exhalation gas from a patient. The device includes a first pipe conduit (5, 8) for the supply of inhalation gas to the patient, a second pipe conduit (6, 9) for the removal of exhalation gas from the patient and a container device (1) for collecting liquid from the exhalation gas. The container device includes a first space (2), which forms a portion of the first pipe conduit (5, 8) and through which the inhalation gas thus flows, and a second space (3), which forms a portion of the second pipe conduit (6, 9) and through which the exhalation gas thus flows. The second space (3) is arranged to receive the collected liquid. The first space (2) is separated from the second space (3) by means of a wall member (4), which has a good thermal conductivity and permits transfer of heat from the exhalation gas to the inhalation gas.

Abstract: A disposable active humidifier for the mechanical ventilation of a patient, which has the particularity that it comprises a cartridge which forms a humidification chamber which is delimited by an inlet and by an outlet and can be interposed in the ventilation circuit. The cartridge has an interspace which is externally delimited by a heat exchange surface and is internally delimited by a hydrophobic membrane which surrounds the humidification chamber. A humidification fluid, originating from a bottle or bag, can be introduced in the interspace.

Abstract: A cold weather breathing device that protects the face including the mouth and nostril area from direct exposure to the external environment, prevents a user's goggles from fogging in cold environments, and keeps moist exhaled breath away from the user's face. In a preferred embodiment, the device is configured to provide separate breathing channels for exhaled air from the mouth and nose. To promote ease of cleaning, the breathing device can be attached to a head garment with a simple interlocking design that allows its removal and separate cleaning. The breathing device provides a nose-channel-forming member and mouth disc that are mounted on the head garment and inset into a mouth-channel-forming member which is thus attached to the head garment.

Abstract: A pressurized gas supply system includes a pressurized container which expands and contracts. The container includes a one-piece liner molded from a polymer which is reinforced by a high tensile fiber such as KEVLAR®. A valve is molded into the liner, and a regulator is connected to the valve. A hose, having a conserver positioned therealong, extends between the regulator and a fitting allowing a user to inhale gas from the container. The container is carried in a carrying bag, which can be in the form of a carrying case, a purse, or a back-pack.

Abstract: A cold weather breathing device and method. Exhaled air warmed by the lungs of a user is flowed into contact with a heat exchange medium to heat the heat exchange medium. The heat exchange medium is positioned in a hollow body adjacent the chest and under cold weather outer clothing of the user. Upon inhaling, cold outside air is contacted with the heat exchange medium so that the inhaled air is heated by the heat exchange medium.

Abstract: A first and second housing joined together and rotatable with respect to each other, each housing having a conduit integral with an exterior wall, the conduits each having passageways leading to an internal portion of the respective housings. An internal edge of each housing mounts a heat-moisture exchange material having a transverse opening axially aligned with the passageway of the closest conduit. The passageway in the respective conduits are offset permitting passage of air to and from the patient through the heat-moisture material. The housings are rotated with respect to each other to axially align the passageways in the two conduits to permit passage of aerosol medicine through the exchanger without passing through the heat-moisture material.

Abstract: A breathing protector for a laryngectomized or tracheotemized person to be applied over a tracheostoma includes a heat-moisture exchanger body which communicates with the tracheostoma through an inlet (relative to exhaling) and has contact surface turned toward the person. A substantially flat surface layer on the body faces the neck when the breathing protector is applied to the neck covering the stoma and is dimensioned to extend beyond the stoma to cover also a part of the neck surrounding the stoma. A elate covers a flat end surface on the heat-moisture exchanger body which is sandwiched between the surface layer and the plate. An outlet opening extends along the periphery of the heat-moisture exchanger body between the surface layer and the plate to impart to respiration air at least one component which is substantially parallel with the surface layer.

Abstract: A heat and moisture exchanger (HME) adaptor for a closed suction catheter assembly having one end in communication with a closed suction catheter assembly and another end configured to engage and releasably hold the HME is disclosed herein. The adaptor may include a retainer having an aperture that engages projections on the HME to releasably secure the adaptor to the HME. The adaptor may include a retaining ring or retaining arms that may be deformed or rotated to engage or disengage the projections from the HME.

Abstract: A device for passive humidification of tracheostomized or intubated patients, comprising an outer body which forms an opening for connection to the patient and is connected to at least one seat of a filtering element which is connected to the outside, the device further comprising, on the outer body, a coupling for connection to at least one oxygen delivery duct which ends proximate to the outer part of the filtering element.

Abstract: A self-moistening tracheostomy device including a box-like shell having an entry attachment mouth disposed on one side thereof for receiving the end of a tracheostomy cannula, an inlet opening for oxygen administration, and an exchanger element located inside said box-like shell wherein an exchanger element has a plurality of cellulose-type laminar elements.

Abstract: A pulmonary function filter includes an adapter, which maybe resilient, allowing the filter to be used on a pulmonary function sensor having a different sized inlet. A pulmonary function sensor and filter combination can be joined by an adapter that may allow such sensor and filter to be joined even though they may have different sized inlet and outlet.

Abstract: The present invention provides a heat and moisture exchange (HME) unit that includes a housing having a fibrous media in the housing that is designed to absorb and retain moisture and heat from exhaled air passing through the housing and transfer the moisture and heat to inhaled air passing through the heat and moisture exchange unit. The heat and moisture exchange unit has an internal bypass in the housing to enable air to pass through the heat and moisture exchange unit without passing through the fibrous media. The present invention also provides a breathing circuit that includes a medication bypass heat moisture exchange unit, a medication treatment device and a ventilator that is connected in a closed system.

Abstract: A novel technique for ventilation and heat exchange is disclosed called Mixed-mode Liquid Ventilation (MMLV). This technique uses an endotracheal catheter to add and remove liquid from the lungs continuously and/or cyclically, and deliver gas at a rate independent of the delivery of liquid. This technique produces small-scale mixing of gas and liquid in the airways, allowing for efficient gas and heat exchange. Medical uses for the technique are disclosed. These uses include induction and reversal of hyperthermia, and hypothermia.

Abstract: A heat exchange module comprising a number of substantially parallel and spaced apart heat exchange elements is provided. One or more surfaces of the heat exchange elements may be coated with a dessicant. The module can be manufactured so that first and second surfaces of the module are curved. The module may be used as part of a face mask or other garment that positions the module within the respiratory air stream of a user. The module may be inserted in a mesh sleeve provided as part of the garment. The module may also be used as part of other forms of clothing that protect the face and in protective helmets, or as part of outdoor or survival equipment.

Abstract: A filter for a respiratory circuit has a housing with an inlet port and an outlet port for connection to respective breathing tubes. A gases space lies between the inlet and outlet ports and gases pass across the gases space from the inlet port to the outlet port in use. A filter media spans the gases space, dividing the gases space into an inlet chamber and an outlet chamber. Gases passing from the inlet port to the outlet port pass through the filter media. A surrounding outer wall surrounds the housing apart from the inlet port and outlet port and is spaced from the wall of the housing. One or more air pockets are created between the outer wall and the housing. The air pockets insulate the housing from ambient conditions.

Abstract: This invention relates to respiratory humidifiers and heated breathing conduits used to couple a patient to the humidifier. A conduit overheating detection system for a conduit having heating wire or element is disclosed. The overheating detection system may be utilised with a in a single limb conduit system or dual limb system. In each of these systems the conduit overheating detection system monitors the current in the heating element(s) and alters the power to the heating element(s) to prevent the occurrence the heating element(s) and/or conduit from overheating.

Abstract: A disposable active humidifier for the mechanical ventilation of a patient, which has the particularity that it comprises a cartridge which forms a humidification chamber which is delimited by an inlet and by an outlet and can be interposed in the ventilation circuit. The cartridge has an interspace which is externally delimited by a heat exchange surface and is internally delimited by a hydrophobic membrane which surrounds the humidification chamber. A humidification fluid, originating from a bottle or bag, can be introduced in the interspace.

Abstract: A HME bypass system including a manually actuated bypass valve which is coupled into a respiratory air circuit, preferably upstream of the HME, to permit inspiratory air to be selectively passed through the HME, or to bypass the HME, depending upon the treatment desired by the healthcare provider.

Abstract: A humidification unit adapted to be disposed in a patient circuit for humidifying the flow of breathing gas delivered to the patient via the patient circuit by an artificial ventilator system. The humidification unit includes an exothermic member having an outer surface and a plurality of hollow fibers disposed on the outer surface of the exothermic member. Each hollow fiber is defined by a peripheral wall having minute openings large enough to allow a gas to pass therethrough yet small enough to prevent a liquid from passing therethrough. Liquid delivered to the hollow fibers is heated by the exothermic member and the gas vapor resulting from the heating passes through the hollow fiber walls and humidifies the flow of breathing gas delivered to the patient.

Abstract: A heat-moisture exchanger (HME) and nebulization device for connection to a mechanical ventilator or anesthesia apparatus, to provide humidification or an aerosolized medication without disconnection of the HME from the ventilator circuit, a respiratory device comprising a first housing having an output fitting to provide a connection to an artificial airway of a patient, and a rotatable second housing connected to the first housing, having an input fitting to provide a connection to a ventilator circuit, the input fitting, and the output fitting are in communication with a primary gas flow, the first housing is partitioned into at least two chambers, a chamber to provide an enclosure for an absorbent material, and a chamber to provide a passageway for conveyance of an aerosol, the second housing to provide an enclosure for a nebulizer having a reservoir for a liquid medication, an instillation port to inject the liquid medication, interior to the chamber or passageway, a reciprocating member to open and clos

Abstract: A tracheal humidification system (20) includes a filter (26) for humidifying the air being breathed by the patient. The filter (26) is disposed in an uppermost portion (24) of a breathing path (22). At least one secretion path (28) including a drain tube (30) is provided for collecting secretions (512) from the patient. Filter (26) is disposed above the secretion path (28), so that the secretions (512) are prevented from contacting and clogging filter (26).

Abstract: A moisture trap including a housing with an inlet and an outlet and defining a reservoir therein. A conduit in the housing extends through the reservoir from the inlet and the conduit has a distal open end spaced from the housing outlet. A hydrophilic filter canister is received in the housing filling the reservoir. The canister includes an end wall disposed over the distal open end of the conduit, the end wall having gas ports therethrough in fluid communication between the housing outlet and the distal open end of the conduit. A hydrophilic column extends from the end wall within the conduit for collecting liquid and wicking collected liquid into the reservoir. A hydrophobic filter is disposed between the hydrophilic filter canister and the housing outlet to block liquid from passing through the outlet.

Abstract: A disposable active humidifier for the mechanical ventilation of a patient, which has the particularity that it comprises a cartridge which forms a humidification chamber which is delimited by an inlet and by an outlet and can be interposed in the ventilation circuit. The cartridge has an interspace which is externally delimited by a heat exchange surface and is internally delimited by a hydrophobic membrane which surrounds the humidification chamber. A humidification fluid, originating from a bottle or bag, can be introduced in the interspace.

Abstract: A device for passive humidification of tracheostomized or intubated patients, comprising an outer body which forms an opening for connection to the patient and is connected to at least one seat of a filtering element which is connected to the outside, the device further comprising, on the outer body, a coupling for connection to at least one oxygen delivery duct which ends proximate to the outer part of the filtering element.