WO2004105848A1 - Dispositifs de rechauffement pour tubes de respiration - Google Patents

Dispositifs de rechauffement pour tubes de respiration Download PDF

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Publication number
WO2004105848A1
WO2004105848A1 PCT/GB2004/002285 GB2004002285W WO2004105848A1 WO 2004105848 A1 WO2004105848 A1 WO 2004105848A1 GB 2004002285 W GB2004002285 W GB 2004002285W WO 2004105848 A1 WO2004105848 A1 WO 2004105848A1
Authority
WO
WIPO (PCT)
Prior art keywords
wire
tube
heating wire
breathing
tube assembly
Prior art date
Application number
PCT/GB2004/002285
Other languages
English (en)
Inventor
Stuart Corner
Paul Berwick
Original Assignee
E.M.E. (Electro Medical Equipment) Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GB0312473A external-priority patent/GB0312473D0/en
Priority claimed from GB0320193A external-priority patent/GB0320193D0/en
Application filed by E.M.E. (Electro Medical Equipment) Limited filed Critical E.M.E. (Electro Medical Equipment) Limited
Publication of WO2004105848A1 publication Critical patent/WO2004105848A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/1075—Preparation of respiratory gases or vapours by influencing the temperature
    • A61M16/1095—Preparation of respiratory gases or vapours by influencing the temperature in the connecting tubes

Definitions

  • This invention relates to heaters for conduits which supply humidified air from a ventilator to a patient for reducing condensation in the conduit .
  • one such system which is currently available commercially has a specially modified breathing tube with apertures moulded into it at certain points into which encased thermistors are inserted.
  • the thermistors monitor the temperature of the gas in the tube and may therefore be used to regulate the power supply to the heating wire if the temperature of the supplied gas rises too high.
  • the Applicant has realised that there are a number of problems associated with it.
  • the encased thermistor assembly is relatively expensive such that it must be reused from one patient to the next .
  • it is not sufficiently robust to be sterilised in a clinical autoclave and must therefore be cleaned using wipes. This is generally unsatisfactory and compromises the overall hygiene of the system.
  • the breathing tube itself and the heating wire are disposable.
  • a further problem with the system described above is that the encased thermistors must be inserted into the apertures in the breathing tube each time the equipment is set up.
  • the thermistors are designed to be a tight fit in the apertures, but this can make them difficult to insert properly. It is therefore not uncommon for the thermistors not to be pushed fully home. This makes them inaccurate as they are not then in the degree of thermal contact with the gas flow that they were designed for. This is a potentially dangerous situation since it will result in the thermistor returning a reading corresponding to a lower temperature than the actual temperature of the gas .
  • This results in the power to the heating wire being increased which exacerbates the problem. In the most extreme case, the temperature of the heating wire could be raised to such an extent that it melts the plastic of the breathing tube. This would clearly be very dangerous. It is an object of the present invention to mitigate at least some of the drawbacks mentioned above.
  • the present invention provides a heating wire assembly for reducing condensation in a breathing tube delivering humidified gas to a patient for breathing, said assembly comprising: an electrically resistive heating wire; and carrying means for supporting said heating wire in use in the breathing tube, the carrying means being configured to hold the heating wire at the periphery thereof .
  • the invention provides a heated breathing tube assembly for delivering humidified gas to a patient for breathing, said assembly comprising: a breathing tube for conveying breathing gas; an electrically resistive heating wire; carrying means supporting said heating wire, the carrying means being disposed in said breathing tube so as to extend across its axis, the carrying means being configured to hold the heating wire at the periphery thereof such that the heating wire is held against the inner wall of the breathing tube.
  • a heater wire may be supported in the breathing tube. This is advantageous as it allows for a predictable temperature profile across the width of the tube. By contrast in some known arrangements where the heating wire simply lays in the tube, the temperature profile is unpredictable and depends upon the path of the tube and thus the heater inside it. Furthermore, by having the heating wire held at the periphery of the carrying means, the temperature profile across the tube may be made more even.
  • the carrying means is preferably of a thermally conductive material such as a loaded polycarbonate. This improves the transfer of heat from the heating wire to the breathing gas passing through the tube.
  • the dimensions of the carrying means will be such as to allow it to support itself generally across a diameter of a standard breathing tube and thus its greatest lateral dimension will be e.g. approximately 10 mm.
  • the carrying means could comprise a plurality, of discrete elements - either formed integrally on the heating wire or attached afterwards by clamping or clipping.
  • discrete elements may be advantageous in promoting turbulent flow of gas over them which improve the transfer of heat to the gas.
  • the elements may comprise suitable formations for promoting turbulent flow.
  • the elements comprise one or more peripheral clips for receiving the heating wire which of course ensures that the heating wire is supported at the periphery of the elements.
  • the heating wire is held in use directly against the inner wall of the breathing tube .
  • the heating wire will be located closer to the wall of the breathing tube than to its centre.
  • the carrying means comprises a continuous length of carrier.
  • the carry means is generally ribbon- shaped.
  • the heating wire could be formed integrally with the carrier, e.g. by co-extrusion, or the carrier may comprise means such as a clip for receiving the wire after formation.
  • the advantages of a continuous length is that it is easier to manufacture and assemble than discrete elements and easier to insert into a breathing tube. If desired it could be formed with openings so as to mimic the effect of discrete elements so as to achieve any advantages to be had thereby, although it is currently preferred to form a continuous carrier by extrusion.
  • the carrying means could be designed to carry just one strand of wire, but preferably is designed to carry two e.g. both arms of a loop of heating wire. In some embodiments, more than two strands may be carried - e.g. four where two loops of heating wire are provided. By spacing the strands around the circumference of the breathing tube, an even more uniform temperature profile could be achieved.
  • the carrying means may carry just the heating wire. In preferred embodiments however the carrying means also carries temperature sensing means for sensing the temperature of the gas in the breathing tube. This has several advantages over the prior art temperature sensing arrangement described hereinabove. Firstly the assembly of heating wire, thermal sensing means and carrying means may be simply inserted into one end of a or the breathing tube to extend along at least part of the length of the tube. It will be appreciated therefore that there is no need for sensors to be inserted into apertures so avoiding the problems with incorrect insertion outlined above . Indeed by holding the heating wire and thermal sensing means in fixed relationship. to one another in the carrying means, and having the carrying means in a predetermined part of the breathing tube, accurate and reliable temperature measurements may be made .
  • the heater wire assembly in accordance with the invention may be manufactured sufficiently inexpensively that it may be disposable.
  • the wire assembly may therefore be inserted into the tube at the time of manufacture and the entire system - i.e. the breathing tube and the heating wire sensing assembly may be disposed of together after a single use . Not only does this facilitate setting up the ventilator apparatus, it avoids the potential hygiene problems outlined above with respect to the prior art.
  • the heating wire is disposed at the periphery of the carrying means and so against the inner wall of the. breathing tube, it is preferred that the temperature sensing means is provided substantially centrally thereof . This gives some degree of thermal isolation between the heating wire and the temperature sensor so that the latter may more accurately reflect the temperature of the gas, whilst at the same time maintaining a degree of thermal contact with the wire so as to allow the supply of power to the latter to be reduced or interrupted in the event that it should overheat excessively, thereby preventing dangerous melting of the breathing tube.
  • the present invention provides a heating wire assembly for reducing condensation in a breathing tube delivering humidified gas to a patient for breathing, said assembly comprising: an electrically resistive heating wire; carrying means for supporting said heating wire in use in the breathing tube; and temperature sensing means for sensing the temperature of gas in the tube, wherein the temperature sensing means is also supported by the carrying means .
  • the temperature sensing means may comprise any thermally responsive sensor giving an electrical signal.
  • the temperature sensing means comprises a plurality of temperature sensors at discrete locations along the heater wire.
  • the sensors comprise thermistors since these are relatively inexpensive and give an easily measured electrical response by their change in resistance .
  • sensors are provided at two locations along the wire, most preferably approximately at the proximal and distal ends thereof respectively.
  • the thermal sensors will be in relatively close proximity to the heating wire. They will therefore at least partially measure the temperature of the heating wire as well as the gas passing over them. This provides an additional safety benefit in that if for any reason the wire should begin to increase in temperature, this will be sensed immediately by the sensors and the power thereto may be reduced.
  • a single sensor may be provided at each location.
  • a pair of sensors is provided at the proximal end, with one being in closer thermal contact with the heating wire than the other. This allows the temperature of the heating wire and the temperature of the gas passing through the tube to be measured independently.
  • the temperature sensing means comprises an elongate sensor extending along a substantial portion of the heating wire .
  • the sensor comprises a resistive wire having a significant temperature coefficient of resistance, either positive or negative, changes in which may be measured to measure temperature .
  • An example of a suitable material would be Nichrome .
  • the temperature sensing means may be arranged to have a sensing zone that is just coextensive with the heating wire. In some preferred embodiments though it extends beyond the heating wire . This allows the temperature of the gas leaving the tube - i.e. to be delivered to a patient - to be measured.
  • FIG. 1 is a cross-sectional view through a known heating wire and breathing tube arrangement, shown for reference only;
  • Fig. 2 is a schematic view of a breathing tube arrangement in accordance with the present invention.
  • Fig. 3a is a transverse cross-section through the breathing tube of Fig . 2 ;
  • Fig. 3b is a cross-section similar to Fig. 3a showing the temperature profile in use
  • Figs. 4a and 4b are respectively longitudinal cross-sections in perpendicular planes through a breathing tube arrangement in accordance with a second embodiment of the invention
  • Fig. 5 is a diagram showing a breathing tube arrangement in accordance with a further embodiment of the invention
  • Fig. 6 is a transverse cross-section through the tube of Fig. 5;
  • Fig. 7 is a view of a further embodiment of the invention.
  • Fig. 8 is a transverse cross-section through Fig. 7;
  • Fig. 9 is a perspective view of another embodiment of the invention.
  • Fig. 10 is a view of yet another embodiment of the invention.
  • Fig. 11 is a view of yet another embodiment of a heating wire assembly.
  • Fig. 1 there may be seen a transverse cross-section through a breathing tube and heating wire in accordance with a known arrangement .
  • the resultant temperature profile B is of relatively small extent and it does not effectively heat across the. whole width of the breathing tube C.
  • Fig. 2 shows schematically an embodiment of the present invention.
  • a looped heating wire 2 is provided in a standard breathing tube 4.
  • the two arms of the heating wire 2 are held apart against opposite sides of the interior wall of the breathing tube 4 by carrying means in the form of a series of spaced retaining clips 6.
  • each clip 6 comprises an elongate central shaft 6a at each end of which is a part-circular resilient clip 6b.
  • the clip 6 is made from a suitable flexible plastics material so that the heating wire 2 may be clipped into and retained in the two peripheral clips 6b. It will be seen that the width of the clip 6 is such that when the heating wire 2 is received therein, it is approximately equal to the interior diameter of the breathing tube . This means that the clip 6 will extend across the middle of the tube 4 and will support the heating wire 2 at diametrically opposed points on the inner wall of the tube .
  • Fig. 3b shows the temperature profile resulting from the arrangement in Figs. 2 and 3a. It will be seen that the heating effect of the wire 2, shown schematically by the dashed line 8, extends across the whole width of the tube and is relatively even.
  • Figs. 4a and 4b show respectively two schematic longitudinal cross-sections through a heated wire arrangement in accordance with another embodiment of the invention.
  • This embodiment is identical to the previous one except that the clips 6' each comprise a pair of transversely projecting wings 10. As will be seen from the arrows, these act to deflect the gas passing over them to encourage turbulence and therefore better heat transfer from the heating wire 2 to the gas in the tube 4.
  • Fig. 5 shows another embodiment of the invention.
  • the heating wire 2 is supported in a similar position by a continuous extruded ribbon 12. This may be seen more clearly in the cross-section of Fig. 6. From here it will be seen that the cross- sectional profile is similar to that of the clips of the previous embodiment with the two arms of the wire loop 2 being supported across a diameter of the tube 4 by a thin web 14. At each edge of the web 14 however is an enclosed lumen 16 into which the heating wire 2 is received. The heating wire is therefore separated from the interior wall of the breathing tube 4 by the lumen wall thickness, but is at either side still essentially at the periphery of the ribbon carrier 12.
  • the temperature profile 18 is very similar to that of the previous embodiment.
  • the advantage of the embodiments shown in Figs. 5 and 6 is that the ribbon 12 may be extruded onto the heating wires 2 and the assembly then simply inserted into the breathing tube. Indeed, since the heating wire 2 is received in an enclosed lumen 16, the wire does not require its own insulation.
  • Figs . 7 and 8 show a further embodiment of the invention.
  • This embodiment is similar to the previous one except that the heating wire is in the form of a double loop.
  • the carrying means is now cross shaped in profile with two perpendicular webs 20 supporting the four arms of the wire loops 2. It will be seen that the temperature profile 22 gives yet more even and efficient heating of the interior of the breathing tube 4 than in the previous embodiment .
  • Fig. 9 shows schematically an embodiment similar to that shown in Figs. 5 and 6 except that in this embodiment the central web 24 of the ribbon 26 is slightly thicker and has embedded in it a temperature sensor in the form of a single loop of resistive wire 28.
  • the resistive wire 28 has a significant positive temperature coefficient of resistance (PTC) so that as - li the temperature it experiences increases, its electrical resistance will increase by a measurable amount . Since the relationship between temperature and resistance for the sensor wire 28 is known, the measured change in resistance may be used to calculate its temperature. Since the web 24 is still relatively thin, the temperature of the wire 28 will give a reasonably good indication of the temperature of the gas passing through the breathing tube 4.
  • PTC positive temperature coefficient of resistance
  • the sensor wire 28 therefore allows electrical power to the heating wire 2 to be regulated to maintain the temperature of the gas being supplied to the patient within a required range. Although the sensor wire 28 is to some degree thermally isolated from the heater wire 2, it will also sense overheating of this wire in the event of a malfunction before the heater wire 2 reaches a temperature at which the heater tube 4 would be in danger of melting.
  • Fig. 10 shows a yet further embodiment of the invention which is similar to that shown in Fig. 9 except that the temperature sensor is in the form of a thermistor 30 rather than a continuous length of PTC wire. Signal wires 31 for the thermistor are embedded into the central web 24.
  • an overmoulding 32 is provided over the end of the ribbon 26 in order to encase and support the looped end of the heating wire 2 but particularly the thermistor 30.
  • a further thermistor (not shown) is provided at the proximal end of the heater ribbon 26.
  • Fig. 11 shows another embodiment similar to that shown in Fig. 10 but with the thermistor 30 being spaced from the end of the heating wire 2.
  • the thermistor is approximately 190mm from the end of the heating wire.
  • the overmoulding 34 is correspondingly elongate to support the thermistor 30.
  • Signal wires 31 are buried in the heater ribbon 26 and connect the thermistor 30 to a terminating connector (not shown) at the other end of the ribbon.
  • the advantage of the embodiment shown in Fig. 11 is that the thermistor 30 will accurately reflect the temperature of the gas leaving the breathing tube without being influenced by the temperature of the heater. This allows the proximal thermistor (not shown) to monitor mainly the temperature of the heating wire 2, whilst the distal thermistor 30 measures the exit temperature of the gas .

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  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)

Abstract

La présente invention concerne un ensemble à fil chauffant permettant de réduire la condensation dans un tube de respiration (4) délivrant du gaz humidifié à un patient à des fins de respiration. Ledit ensemble comprend un fil chauffant électriquement résistant (2) et un support en forme de ruban (26) conçu pour supporter le fil chauffant (2) en cours d'utilisation dans le tube de respiration (4). Le support en forme de ruban (26) est conçu pour maintenir le fil chauffant (2) sur le pourtour du tube de respiration (4) de sorte que ledit fil soit maintenu contre la paroi interne du tube. Le support en forme de ruban (26) peut être conçu pour porter au moins deux brins de fil chauffant (2) espacés sur le pourtour d'un tube de respiration (4) et supportés le long d'un diamètre du tube par une âme (24). Le support (26) peut également supporter un ou plusieurs capteurs de température tels que le fil résistant (28) permettant de détecter la température du gaz dans le tube de respiration (4).
PCT/GB2004/002285 2003-05-30 2004-05-28 Dispositifs de rechauffement pour tubes de respiration WO2004105848A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB0312473.2 2003-05-30
GB0312473A GB0312473D0 (en) 2003-05-30 2003-05-30 Breathing device
GB0320193A GB0320193D0 (en) 2003-08-28 2003-08-28 Heaters for breathing tubes
GB0320193.6 2003-08-28

Publications (1)

Publication Number Publication Date
WO2004105848A1 true WO2004105848A1 (fr) 2004-12-09

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Cited By (26)

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Publication number Priority date Publication date Assignee Title
WO2006019323A1 (fr) * 2004-08-20 2006-02-23 Fisher & Paykel Healthcare Limited Appareil de mesure des propriétés des gaz administrés à un patient
WO2006072231A2 (fr) * 2005-01-07 2006-07-13 Seleon Gmbh Lunettes a air, embout nasal, element en y, et procede associe
WO2008055467A2 (fr) 2006-11-10 2008-05-15 Dräger Medical AG & Co. KG Système de tuyau respiratoire muni d'un élément chauffant
US20130081625A1 (en) * 2011-09-30 2013-04-04 Andre M. Rustad Capillary heater wire
US8733349B2 (en) 2009-07-31 2014-05-27 Resmed Limited Wire heated tube with temperature control system, tube type detection, and active over temperature protection for humidifier for respiratory apparatus
DE202014103098U1 (de) 2013-07-11 2014-07-30 Fritz Stephan Gmbh Medizintechnik Heizvorrichtung für einen Beatmungsschlauch und Beatmungsschlauch
US9067036B2 (en) 2011-09-30 2015-06-30 Carefusion 207, Inc. Removing condensation from a breathing circuit
CN104784800A (zh) * 2015-04-23 2015-07-22 刘茹涵 一种自动控温的呼吸长管加热装置
EP2613837A4 (fr) * 2010-09-10 2015-10-21 Carefusion 207 Inc Ajustement d'élément pour circuit respiratoire
US9212673B2 (en) 2011-09-30 2015-12-15 Carefusion 207, Inc. Maintaining a water level in a humidification component
US9272113B2 (en) 2012-03-30 2016-03-01 Carefusion 207, Inc. Transporting liquid in a respiratory component
US20160354573A1 (en) 2012-11-14 2016-12-08 Matthew Liam Buswell Zone heating for respiratory circuits
US9572949B2 (en) 2013-02-01 2017-02-21 Resmed Limited Wire heated tube with temperature control system for humidifier for respiratory apparatus
US9802022B2 (en) 2008-03-06 2017-10-31 Resmed Limited Humidification of respiratory gases
US9855398B2 (en) 2006-11-08 2018-01-02 Resmed Limited Humidifier for respiratory apparatus
US9867959B2 (en) 2011-09-30 2018-01-16 Carefusion 207, Inc. Humidifying respiratory gases
WO2018116187A1 (fr) * 2016-12-22 2018-06-28 Fisher & Paykel Healthcare Limited Tuyaux médicaux et procédés de fabrication
US10168046B2 (en) 2011-09-30 2019-01-01 Carefusion 207, Inc. Non-metallic humidification component
CN111265754A (zh) * 2014-03-17 2020-06-12 费雪派克医疗保健有限公司 用于呼吸***的医用管
US10814091B2 (en) 2013-10-24 2020-10-27 Fisher & Paykel Healthcare Limited System for delivery of respiratory gases
US10828482B2 (en) 2013-12-20 2020-11-10 Fisher & Paykel Healthcare Limited Humidification system connections
US10960167B2 (en) 2015-09-09 2021-03-30 Fisher & Paykel Healthcare Limited Zone heating for respiratory circuits
US11013875B2 (en) 2005-08-15 2021-05-25 ResMed Pty Ltd Low cost CPAP flow generator and humidifier assembly
US11058844B2 (en) 2012-12-04 2021-07-13 Fisher & Paykel Healthcare Limited Medical tubes and methods of manufacture
US11318270B2 (en) 2011-06-03 2022-05-03 Fisher & Paykel Healthcare Limited Medical tubes and methods of manufacture
WO2022134924A1 (fr) * 2020-12-25 2022-06-30 北京怡和嘉业医疗科技股份有限公司 Tuyau de distribution de gaz respiratoire, cathéter nasal et dispositif de thérapie de ventilation

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Cited By (64)

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Publication number Priority date Publication date Assignee Title
US8453641B2 (en) 2004-08-20 2013-06-04 Fisher & Paykel Healthcare Limited Apparatus for measuring properties of gases supplied to a patient
US11679224B2 (en) 2004-08-20 2023-06-20 Fisher & Paykel Healthcare Limited Apparatus for measuring properties of gases supplied to a patient
US8186345B2 (en) 2004-08-20 2012-05-29 Fisher & Paykel Healthcare Limited Apparatus for supplying gases to a patient
CN101018582A (zh) * 2004-08-20 2007-08-15 菲舍尔和佩克尔保健有限公司 用于测量供应给患者的气体的特性的装置
US11007340B2 (en) 2004-08-20 2021-05-18 Fisher & Paykel Healthcare Limited Apparatus for measuring properties of gases supplied to a patient
US9814856B2 (en) 2004-08-20 2017-11-14 Fisher & Paykel Healthcare Limited Apparatus for measuring properties of gases supplied to a patient
US9265902B2 (en) 2004-08-20 2016-02-23 Fisher & Paykel Healthcare Limited Apparatus for measuring properties of gases supplied to a patient
US10537698B2 (en) 2004-08-20 2020-01-21 Fisher & Paykel Healthcare Limited Apparatus for measuring properties of gases supplied to a patient
US10709865B2 (en) 2004-08-20 2020-07-14 Fisher & Paykel Healthcare Limited Apparatus for measuring properties of gases supplied to a patient
US11911564B2 (en) 2004-08-20 2024-02-27 Fisher & Paykel Healthcare Limited Apparatus for measuring properties of gases supplied to a patient
WO2006019323A1 (fr) * 2004-08-20 2006-02-23 Fisher & Paykel Healthcare Limited Appareil de mesure des propriétés des gaz administrés à un patient
CN103143099A (zh) * 2004-08-20 2013-06-12 菲舍尔和佩克尔保健有限公司 用于测量供应给患者的气体的特性的装置
US11458273B2 (en) 2004-08-20 2022-10-04 Fisher & Paykel Healthcare Limited Apparatus for measuring properties of gases supplied to a patient
WO2006072231A2 (fr) * 2005-01-07 2006-07-13 Seleon Gmbh Lunettes a air, embout nasal, element en y, et procede associe
EP2374494A3 (fr) * 2005-01-07 2012-02-22 TNI medical AG Lunette à air, embout nasal, élément en Y et procédé associé
EP1859831A1 (fr) 2005-01-07 2007-11-28 Seleon GmbH Canule nasale
WO2006072231A3 (fr) * 2005-01-07 2006-11-16 Seleon Gmbh Lunettes a air, embout nasal, element en y, et procede associe
US11298482B2 (en) 2005-08-15 2022-04-12 ResMed Pty Ltd Low cost CPAP flow generator and humidifier assembly
US11013875B2 (en) 2005-08-15 2021-05-25 ResMed Pty Ltd Low cost CPAP flow generator and humidifier assembly
US9855398B2 (en) 2006-11-08 2018-01-02 Resmed Limited Humidifier for respiratory apparatus
WO2008055467A3 (fr) * 2006-11-10 2008-09-18 Draeger Medical Ag Système de tuyau respiratoire muni d'un élément chauffant
CN101534889B (zh) * 2006-11-10 2014-04-23 德尔格医疗有限责任公司 具有加热元件的呼吸软管***
WO2008055467A2 (fr) 2006-11-10 2008-05-15 Dräger Medical AG & Co. KG Système de tuyau respiratoire muni d'un élément chauffant
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