US20090025723A1 - Nasal cannula - Google Patents

Nasal cannula Download PDF

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Publication number
US20090025723A1
US20090025723A1 US11/920,100 US92010005A US2009025723A1 US 20090025723 A1 US20090025723 A1 US 20090025723A1 US 92010005 A US92010005 A US 92010005A US 2009025723 A1 US2009025723 A1 US 2009025723A1
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United States
Prior art keywords
tube
nasal cannula
forked
heating wire
forked tube
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Abandoned
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US11/920,100
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English (en)
Inventor
Ulla Schobel
Silvio Kilz
Ingo Muller
Martin Baecke
Heiko Krause
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Individual
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Individual
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Publication of US20090025723A1 publication Critical patent/US20090025723A1/en
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    • 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
    • A61M16/06—Respiratory or anaesthetic masks
    • A61M16/0666—Nasal cannulas or tubing
    • 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
    • A61M16/08—Bellows; Connecting tubes ; Water traps; Patient circuits
    • A61M16/0816—Joints or connectors
    • A61M16/0833—T- or Y-type connectors, e.g. Y-piece
    • 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
    • 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
    • A61M16/08—Bellows; Connecting tubes ; Water traps; Patient circuits
    • A61M16/0808—Condensation traps
    • 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3368—Temperature
    • A61M2205/3372—Temperature compensation
    • 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/36—General characteristics of the apparatus related to heating or cooling
    • A61M2205/3653—General characteristics of the apparatus related to heating or cooling by Joule effect, i.e. electric resistance
    • 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/42—Reducing noise

Definitions

  • the invention relates to wearable respiration devices, more specifically to air glasses apparatus, nasal cannula, nosepiece, Y-shaped element and corresponding method. Specifically, the invention relates to constructive modifications to facilitate the use of nasal cannulas for pneumatically splinting the upper respiratory tract.
  • Obstructive respiratory disorders lead to apneas (respiratory arrest) making the sleeping person wake up. Frequent apneas prevent the sleeping person from falling into the restful deep sleep. Persons suffering from apneas during sleep are, therefore, tired in the daytime, which may result in social problems at the workplace and, in the worst case, in fatal accidents, e.g. of professional drivers.
  • CPAP continuous positive airway pressure
  • the patient is supplied with a constant positive pressure via a nose mask so as to splint the upper respiratory tract.
  • the correct choice of the positive airway pressure ensures that the upper respiratory tract remains fully opened during the whole night, so that no obstructive respiratory disorders will occur.
  • Bi-level apparatus were developed, inter alia, to increase the comfort, which reduce the pressure during the respiratory break.
  • the term PAP apparatus is here used as generic term for apparatus that pneumatically splint the upper respiratory tract.
  • Snoring and apneas may have one and the same cause, that is, too slack a palatal and tongue tissue.
  • oxygen cannulas for the oxygen treatment are known from the prior art.
  • the oxygen cannulas are used to provide the patient with air having an increased partial pressure of oxygen (>210 mbar) or pure oxygen through the nose.
  • An oxygen treatment takes place, for example, in the case of acute or chronic hypoxemia as a result of respiratory or cardiac/circulatory disorders (myocardial infarction, shock) or certain poisonings, e.g. through carbon monoxide, carbon dioxide, illuminating gas or smoke.
  • oxygen cannulas in an anti-snoring apparatus is known from WO 02/062413 A2 (HEW01).
  • oxygen cannulas are designated as nasal cannulas.
  • Vapotherm 2000i is a humidifying system, which delivers airflows in the range of 8 to 40 l/min via a nasal cannula to patients.
  • the delivered air is humidified and heated. Air may be accumulated with oxygen.
  • the heating of a forked tube by means of a heating wire can prevent the condensation of humidity in the forked tube.
  • a laying of the heating wire in the interior of the forked tube is simple under the aspect of production engineering. Because of the heat release to the ambience of the forked tube the temperature in the forked tube drops approximately linearly with the distance from the compressor. This temperature drop may be compensated by a constant heating power per unit of length, such as one generated by the heating wire. In dependence on the construction of the tube the necessary heating power can be kept under 15 watt for the entire nasal cannula. In other cases, legal provisions would demand the use of fire-retarding plastics, which are generally not biocompatible and the use of which in medical engineering products is therefore problematical.
  • a temperature measurement of the administered air allows to control the heating power of a heating wire or a heater in a compressor casing in such a way that the temperature is comfortable for the user. Without a compensation of the temperature drop in the forked tube the application apertures in the prongs would be the coldest spots. Consequently, this is where humidity is condensed most. For this reason, a control of the heating power based on a temperature measurement in the proximity of the application apertures is suited best to prevent a condensation in the entire nasal cannula.
  • the temperature sensor be read out via the heating wire. Due to the progress made in the integration of circuits it is possible to produce digital temperature sensors of an acceptable size, which modulate their sensor signal onto the heating wire.
  • elevations and recesses extending along the heating wire are particularly suited to ensure a sufficient airflow.
  • a triangular cross-section of the elevations advantageously provides that the contact surface between the insulation of the heating wire and the inside of the forked tube is kept small during both normal operation and kinking.
  • the overall star-shaped cross-section of the insulation advantageously enlarges the surface of the insulation and thus provides for a reduction of the thermal resistance between the insulation and the air flowing past.
  • projections extending in the longitudinal direction of the forked tube advantageously make sure that there is a sufficient airflow, inter alia, for cooling the heating wire, even if the forked tube is kinked.
  • Stabilizing wires serve to reduce a longitudinal expansion of the tubes.
  • transition regions between a prong and the central connection piece as well as between a prong and the connection piece on the side of the prong are rounded off so as to advantageously prevent the formation of whirls and, thus, an emission of noise.
  • An indentation in the central connection piece allows the adjustment of an optimum flow resistance of the connection piece.
  • FIG. 1 shows a nasal cannula according to the invention, comprising a first embodiment of a nosepiece.
  • FIG. 2 shows a Y-shaped element comprising a temperature sensor.
  • FIG. 3 shows a nasal cannula according to the invention comprising a double-lumen tube.
  • FIG. 4 shows a temperature measurement circuit
  • FIG. 5 shows the cross-section of a heating wire.
  • FIG. 6 shows the cross-section of a tube comprising a heating wire.
  • FIG. 7 shows a perspective view of a second embodiment of a nosepiece from a first direction.
  • FIG. 8 shows a section through a prong along Z-Z.
  • FIG. 9 shows a perspective view of the second embodiment of the nosepiece from a second direction.
  • FIG. 10 shows a section along M-M.
  • FIG. 11 shows a perspective view of the second embodiment of the nosepiece from a third direction.
  • FIG. 12 shows a Y-shaped element for nasal cannulas according to the invention.
  • FIG. 1 shows a nasal cannula 1 according to the invention, comprising a first embodiment of a nosepiece 2 .
  • the nose piece 2 is supplied with compressed air via a forked tube 3 , a Y-shaped element 4 , a supply tube 5 and a connector 6 .
  • the nosepiece 2 includes two prongs 12 for administrating air into both nostrils of a user.
  • Internal radius steps 16 compensate the difference between the internal and external radius of the forked tubes, thereby preventing abrupt changes to the cross-section of the airways.
  • the connector 6 comprises a pneumatic connector part 10 , an electrical connector part 9 as well as a clamp 11 . From the electrical connector part 9 a heating wire 8 is passed through the supply tube 5 , the Y-shaped element 4 , the right element of the forked tube 3 , the right part of the nosepiece 2 to a temperature sensor 7 , and from there through the left part of the nosepiece 2 , the left element of the forked tube 3 , the Y-shaped element 4 and the supply tube 5 back to the electrical connector part 9 .
  • the clamp 11 engages a bushing provided for the connector 6 and secures the connector 6 against an unintended unplugging.
  • a possible cross-section of the forked tube 3 and the supply tube 5 is explained in connection with FIG. 6 .
  • the supply tube 5 has a larger cross-section than the forked tube 3 because the supply tube 5 typically has to transport double the airflow, because the distance to be covered is greater and because the losses of comfort with a great tube thickness are smaller.
  • the word forked tube has merely been chosen because the supply tube 5 is “forked” at the Y-shaped element 4 .
  • the heating wire 8 With a view to approval requirements it may be necessary to shield the insulation of the heating wire 8 in the area of the nose piece 2 against the prongs 12 by an additional partition wall 18 . In the area of the nosepiece 2 the heating wire 8 then extends in an additional lumen 17 .
  • nasal cannulas are to be used for pneumatically splinting the upper respiratory tract, there is a problem with respect to the noise development caused by the high airflows through the supply tubes and forked tubes, which are thin as compared to respiratory tubes. This results in a high flow velocity of the air, which generates noise at the edges. Therefore, it has been provided in the nasal cannula illustrated in FIG. 1 that the inner walls of the supply tube 5 , of the Y-shaped element 4 , of the two elements of the forked tube 3 , of the nosepiece 2 and of the prongs 12 do not include any sharp edges and that specifically the inside of the transitions between these components do not form any steps or edges.
  • component 7 may be a temperature switch 19 , which one can regard as a temperature sensor having a poor resolution of one bit.
  • the temperature switch can be realized, for example, by a bimetallic contact having a release temperature, for example, in the range of 30° C. to 50° C., specifically of 40° C. If the temperature of the temperature switch exceeds the release temperature, the heating circuit is interrupted.
  • a temperature sensor or switch 19 may be accommodated in the Y-shaped element 4 , which is illustrated in FIG. 2 .
  • An additional temperature switch e.g. a bimetallic contact having a release temperature of (50 ⁇ 10)° C., may represent a further protection against overheating, e.g. if the forked tube 3 and/or the supply tube 5 is/are kinked unintentionally. Above the release temperature the heating circuit is interrupted.
  • the temperature switch 19 shown in FIG. 2 schematically represents a bimetallic contact.
  • a temperature sensor or switch 19 can effectively prevent condensation on its own because the supply tube 5 not heated by the patient's body ends in the Y-shaped element.
  • the coldest spot and therefore the most susceptible point to condensation in the supply tube 5 is located between the compressor and the nosepiece 2 . If the temperature of the coldest spot is kept above the thawing point, no condensation will take place.
  • a shifting of the temperature sensor or switch into the Y-shaped element 4 may increase the wearing comfort of the nasal cannula 1 , because the nosepiece 2 can be constructed lighter and smaller.
  • the temperature of the air in the prongs 12 can be calculated by approximation from the temperature in the Y-shaped element, from the heating power and from the adjusted flow, if the geometry of the nasal cannula is predetermined, specifically if the lengths of the tubes and the diameters are predetermined, a shifting of the temperature sensor from the nosepiece 2 into the Y-shaped element 4 does not entail any considerable losses of comfort.
  • FIG. 3 shows a second embodiment of a nasal cannula, in which the supply tube 5 and the Y-shaped element 4 have been replaced by a double-lumen tube 13 .
  • the double-lumen tube consists of two forked tube elements which are mechanically connected to each other.
  • the Y-shaped element 4 is not applicable or is integrated in the connector 6 according to another perspective.
  • no sharp edges are provided, but only wide radii.
  • a clip 14 may be provided, which prevents the double-lumen tube from further splicing apart.
  • the division of an airflow to two forked tube elements may be realized in the connector 6 and is, thus, farther away from the prongs 12 so that the noise emission is lower.
  • FIG. 4 shows a possibility to read out a temperature sensor via two heating wires only.
  • the two heating wires 8 are represented by the two resistors R H .
  • R T represents a two-terminal network with a temperature-dependent clamping characteristic.
  • the resistor R T is merely a temperature-dependent resistor such as a Pt100 or a Pt1000.
  • R T is large with respect to R H .
  • the heating wires typically have a resistance of 15 ⁇ with great tolerances. If a positive heating voltage U H is administered to the three serially connected resistors, the temperature sensor is short-circuited by the parallel-connected diode D, so that substantially only the heating wires are heated. If a negative or a small measuring voltage U M is administered to the three serially connected resistors, the major part of the measuring voltage falls on the temperature sensor R T . From this the temperature of the temperature sensor can be determined. The remaining voltage differences over the heating resistors can be calculated and allowed for.
  • a temperature-dependent power source which is, for example, provided in the form of the integrated circuit AD592, as a two-terminal network R T .
  • the diode D serves to bypass and, thus, protect the integrated circuit for the heating current.
  • a Schottky diode may be used for the diode D because of its small forward voltage.
  • the direction of the measuring current is inverse to the heating current. Its amount depends on the temperature and on the integrated circuit as used and amounts to a few 100 ⁇ A.
  • the particular advantage of this solution is that the wire resistance has practically no influence on the measuring result.
  • the polarity or level of the administered voltage may be switched over far more quickly than the thermal inertia of the system, so that the switching over between heating voltage U H and measuring voltage U M entails practically no change in temperature.
  • FIG. 5 shows a section through the embodiment of a heating wire 8 .
  • a metal wire 21 is embedded in an insulation 22 .
  • the insulation has a star-shaped cross-section with five triangular radials and is thus invariant with respect to rotations by 72°.
  • the metal wire 21 may have a star-shaped cross-section. Each radial forms an elevation extending lengthwise of the wire. The elevations may also extend about the shell in a helical manner, with the length of one revolution being typically a multiple of the circumference of the insulation. It is the purpose of the star-shaped insulation to increase the surface of the wire so as to reduce the thermal resistance with respect to the ambient air.
  • the metal wire 21 may have a diameter of approximately 0.3 mm and a circle just about enclosing the apexes of the cross-section may have a diameter of 1 mm.
  • FIG. 6 shows a section through a tube, which may be a forked tube 3 or a supply tube 5 .
  • the inner shell of the tube includes projections 32 , which serve to expand the jacket of the tube also at kink sites so that the airflow is not fully constricted despite the kink.
  • projections 32 On the outer circumference of the tube and/or in the tube material itself, specifically in projections 32 , stabilizing filaments 31 and 33 , respectively, are mounted or incorporated to reduce a linear expansion of the tube.
  • the stabilizing filaments 31 and 33 may be incorporated into the tube material, specifically into the projections 32 during the production process.
  • the stabilizing filaments 31 and 33 may be made of an artificial or natural fibrous material, a synthetic material or metal.
  • the reason for the provision of the stabilizing filaments is that heat-resistant PVC is too rigid, so that therefore, for example, TPE or silicone have to be used.
  • the latter materials are strongly expandable, which may be undesired in the longitudinal direction because tensile forces occurring in this case have to be absorbed by the heating wire, thereby subjecting it and terminals thereof to mechanical stress.
  • the tubes are operated at maximum pressures of a few 100 millibar, a stabilization in a radial direction does not seem to be necessary.
  • the stabilizing filaments are made of an electrically conductive material, specifically of metal, possibly surrounded by a thermally resistant, not necessarily biocompatible, electrical insulation, they can be employed for heating and replace the heating wire 8 .
  • an electrically conductive material specifically of metal, possibly surrounded by a thermally resistant, not necessarily biocompatible, electrical insulation, they can be employed for heating and replace the heating wire 8 .
  • problems with non-biocompatible insulating materials may be bypassed.
  • the forked tube 3 and/or the supply tube 5 may be surrounded by a thermal insulation 34 .
  • This insulation 34 should not be too thick because specifically a thin forked tube means comfort and a thick insulation means a loss of comfort.
  • an insulation may render the surface of the tubes soft and thus more comfortable. From a technical point of view the insulation has the advantage that it reduces the heating power, which has to remain under 15 W even in the case of a defect, if the power control fails, or if the entire supply voltage is administered. A reduction of the heating power therefore makes the use of less exactly tolerated and, thus, more inexpensive heating wires or longer tubes possible.
  • the nasal cannulas currently projected require, in fact, a maximum heating power of nearly 15 W.
  • FIGS. 7 , 9 and 11 show three perspective views of a second embodiment of a nosepiece 42 .
  • FIGS. 8 and 10 show sections along lines Z-Z and M-M, respectively.
  • the second embodiment of the nosepiece 42 differs from the embodiment of nosepiece of 2 merely with respect to the quality.
  • nosepiece 2 is more bulged, i.e. the clear cross-sectional area increases more strongly from the tube connections to the prongs. This reduces the flow velocity of the air so as to keep the noise emission low.
  • the reduction of the flow resistance by increasing the cross-sectional area in the nosepiece is negligent, because the flow resistance is mainly defined by the thickness of the forked tube 3 .
  • three prototypes each showing a different increase of the cross-sectional area are in preparation. Measurement results are not yet available.
  • the nosepiece 42 comprises tube connections 44 , tube transition regions 45 , connection pieces 47 , prongs 52 having annular knobs 53 as well as a central connection piece 48 .
  • an internal radius step 46 is respectively located between the tube transition regions 45 and the tube connections 44 , which just about compensates the difference between the internal and the external radius of the forked tube 3 so as to obtain a transition as even as possible between the inner surface of the forked tube 3 and the nosepiece 42 .
  • the projections 32 at the ends of the forked tube 3 may be removed, or corresponding projections may be formed on the inner surface of the nosepiece 42 .
  • the transition regions 54 between the prongs 52 and the connection pieces 47 are generously radiused so as to reduce the noise emission.
  • this radius is, for example, externally 4.3 mm.
  • the outer diameter of the prongs in the proximity of the connection piece is 5.5 mm and in the proximity of the aperture 5 mm.
  • the wall thickness is approximately 0.5 mm.
  • transition region between the central connection piece 48 and the prongs 52 is likewise rounded off, wherein the external radius is also in the range between 4 and 5 mm.
  • FIGS. 8 and 10 A sectional view of the indentation 43 in the central connection piece 48 is illustrated in FIGS. 8 and 10 while a top view is shown in FIG. 9 . It serves the adjustment of a defined flow resistance between the left and the right side of the nose glasses.
  • the nasal cannula is mirror-symmetrical. This also applies in most cases to the user. As long as there is a mirror symmetry, no air flows through the central connection piece 48 .
  • the symmetry can be interrupted, for example, by a kink in the left or right forked tube 3 or by the user having a cold so that one nostril is blocked. In the former case it is desirable, on the one hand, that both prongs are supplied by the tube that is still open.
  • the kinked forked tube is, of course, not entirely closed.
  • a pressure drop at the central connection piece 48 may be desirable. If one nostril is blocked, it is desirable to apply more air via the other prong. In this case, too, an airflow through the central connection piece 48 is desirable.
  • FIGS. 9 , 10 and 11 also illustrate the temperature sensor 7 .
  • the Y-shaped element 4 is shown in an enlarged manner.
  • the transition region 95 between the two forked tube connections is rounded off and has in one embodiment a radius of 1 mm.
  • the forked tubes and the supply tube have, for the purpose of comparison, an internal radius (without projections 32 ) of 3 and 5 mm, respectively.
  • the rounding of the transition region 95 is specifically important if asymmetric flow ratios exist, for example, because of a kinked forked tube.
  • All connections have internal radius steps 92 and 94 so as to compensate the difference between the internal radius and the external radius of the connected tubes.
  • the internal radius steps may either have projections corresponding to the projections 32 in the connected tubes and/or the projections 32 may be removed at the ends of the tubes.

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  • Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • Veterinary Medicine (AREA)
  • Anesthesiology (AREA)
  • Emergency Medicine (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)
  • Engineering & Computer Science (AREA)
  • Otolaryngology (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Media Introduction/Drainage Providing Device (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)
  • Eye Examination Apparatus (AREA)
  • External Artificial Organs (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Vehicle Step Arrangements And Article Storage (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
US11/920,100 2005-01-07 2005-12-30 Nasal cannula Abandoned US20090025723A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102005000922A DE102005000922A1 (de) 2005-01-07 2005-01-07 Luftbrille, Nasenstück, Y-Stück sowie Verfahren
DE102005000922.0 2005-01-07
PCT/DE2005/002335 WO2006072231A2 (de) 2005-01-07 2005-12-30 Luftbrille, nasenstück, y-stück sowie verfahren

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US11/920,100 Abandoned US20090025723A1 (en) 2005-01-07 2005-12-30 Nasal cannula
US11/879,027 Active 2027-10-12 US7775210B2 (en) 2005-01-07 2007-07-13 Nasal cannula

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US11/879,027 Active 2027-10-12 US7775210B2 (en) 2005-01-07 2007-07-13 Nasal cannula

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US (2) US20090025723A1 (de)
EP (3) EP2374494B1 (de)
JP (1) JP5026281B2 (de)
CN (1) CN101098726B (de)
AT (2) ATE375178T1 (de)
DE (4) DE102005000922A1 (de)
ES (3) ES2297769T3 (de)
PT (1) PT2374494T (de)
WO (1) WO2006072231A2 (de)

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US20100132707A1 (en) * 2006-04-24 2010-06-03 Ingo Muller Method for controlling a tni apparatus and corresponding tni apparatus
US20110303224A1 (en) * 2010-06-12 2011-12-15 Widgerow Alan D Skin adherent medical devices
US20110315148A1 (en) * 2010-06-12 2011-12-29 Widgerow Alan D Skin adherent medical devices
WO2012107849A1 (en) * 2011-02-07 2012-08-16 Slp Ltd. Nasal cannula with integrated thermal flow sensing
US20130081620A1 (en) * 2011-09-30 2013-04-04 Neil Korneff Fluted heater wire
US20130081622A1 (en) * 2011-09-30 2013-04-04 Neil Korneff Removing condensation from a breathing circuit
US8770199B2 (en) 2012-12-04 2014-07-08 Ino Therapeutics Llc Cannula for minimizing dilution of dosing during nitric oxide delivery
EP2775277A3 (de) * 2013-02-01 2015-04-29 ResMed Ltd. Beheiztes Drahtrohr mit Temperatursteuerungssystem für Befeuchter für eine Beatmungsvorrichtung
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
US9308341B2 (en) * 2011-08-04 2016-04-12 Travis Ray NEELY Oxygen delivery apparatus, system, and method
EP3034122A1 (de) * 2012-12-20 2016-06-22 Koninklijke Philips N.V. Inline-adapter für eine atemtherapievorrichtung
US9795756B2 (en) 2012-12-04 2017-10-24 Mallinckrodt Hospital Products IP Limited Cannula for minimizing dilution of dosing during nitric oxide delivery
US20170312471A1 (en) * 2014-11-13 2017-11-02 Tni Medical Ag Multifunctonal applicator for mobile use
US9867959B2 (en) 2011-09-30 2018-01-16 Carefusion 207, Inc. Humidifying respiratory gases
US10086158B2 (en) 2009-07-31 2018-10-02 Resmed Limited Wire heated tube with temperature control system, tube type detection, and active over temperature protection for humidifier for respiratory apparatus
US10168046B2 (en) 2011-09-30 2019-01-01 Carefusion 207, Inc. Non-metallic humidification component
US10449323B2 (en) 2012-03-30 2019-10-22 Fisher & Paykel Healthcare Limited Humidification system
US11077280B2 (en) * 2012-06-25 2021-08-03 Fisher & Paykel Healthcare Limited Medical components with microstructures for humidification and condensate management
US11439784B2 (en) 2012-10-31 2022-09-13 Vapotherm, Inc. Quiet nasal cannula
US11801358B2 (en) 2013-03-14 2023-10-31 Fisher & Paykel Healthcare Limited Medical components with microstructures for humidification and condensate management

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WO2006072231A3 (de) 2006-11-16
US7775210B2 (en) 2010-08-17
DE102005000922A1 (de) 2006-07-20
DE502005001679D1 (de) 2007-11-22
EP1715909B1 (de) 2007-10-10
EP2374494A2 (de) 2011-10-12
CN101098726A (zh) 2008-01-02
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ATE495779T1 (de) 2011-02-15
DE502005010895D1 (de) 2011-03-03
EP2374494B1 (de) 2017-03-01
ATE375178T1 (de) 2007-10-15
US20070283957A1 (en) 2007-12-13
PT2374494T (pt) 2017-03-24
ES2621654T3 (es) 2017-07-04
WO2006072231A2 (de) 2006-07-13
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EP2374494A3 (de) 2012-02-22
EP1859831B1 (de) 2011-01-19

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