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US3643660A - Nasal cannula - Google Patents

Nasal cannula Download PDF

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Publication number
US3643660A
US3643660A US878628A US3643660DA US3643660A US 3643660 A US3643660 A US 3643660A US 878628 A US878628 A US 878628A US 3643660D A US3643660D A US 3643660DA US 3643660 A US3643660 A US 3643660A
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United States
Prior art keywords
cannula
extensions
tunnel
orifice
patient
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Legal status (The legal status 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 status listed.)
Expired - Lifetime
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US878628A
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English (en)
Inventor
Allan C Hudson
John M Kinnear
Harold R Havstad
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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
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/02—Holding devices, e.g. on the body
    • 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. ventilators; Tracheal tubes
    • A61M16/06—Respiratory or anaesthetic masks
    • A61M16/0666—Nasal cannulas or tubing
    • A61M16/0672—Nasal cannula assemblies for oxygen therapy
    • 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
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/02—Holding devices, e.g. on the body
    • A61M2025/0213—Holding devices, e.g. on the body where the catheter is attached by means specifically adapted to a part of the human body
    • A61M2025/0226—Holding devices, e.g. on the body where the catheter is attached by means specifically adapted to a part of the human body specifically adapted for the nose

Definitions

  • a unified nasal cannula comprises a hollow tubular body having an upper flat or plane surface and a pair of spaced and curved elongated tubular extensions, having exterior orifices for directing a gas flow which extensions project upwardly at an angle from the surface.
  • This object was achieved by tilting a flattened portion of the cannula which lies against the patients face or cheeks, with respect to the plane of the elongated nasal extensions and by curving these extensions in a manner so as to conform with the shape of the nasal passageways.
  • a further disadvantage associated with prior cannulae is in the method in which they are placed on the patient. Where a strap or elastic band is required to be secured around the back of the patients head, the head must be lifted. In cases where the patient suffers from a serious back, head or neck injury, movement of the head is quite undesirable and could cause additional injury. It is to the reduction or elimination of the above-noted disadvantages that the preset invention is directed.
  • the nasal cannula described herein comprises a body portion having a hollow tunnel or tubular area extending therethrough and which body portion has an upper generally flat surface.
  • a pair of spaced elongated tubular extensions extend from the flat surface.
  • the extensions have an outer orifice for directing a gas flow to the nasal passageways of the patient and a lower interior orifice communicating with the tubular area of the body portion.
  • the termination of the tubular area extending through the body provides an opening at each end, which openings may be connected to an oxygen supply tube.
  • the tubular extensions are preferably curved so that they intersect the flat surface of the body portion at an angle.
  • the cannula when fitted to the patient is positioned so that the flat surface lies across the nostrils (anterior nares) and the approximate center thereof between the spaced tubular extensions rests upon the exterior nasal septum. In this manner, contact of the cannula with the upper lip area is essentially avoided with patient discomfort and .skin irritation minimized.
  • FIG. 4 illustrates a preferred method by which the cannula is secured to the patient utilizing the oxygen supply tubes.
  • the construction of the nasal cannula 10 includes a body portion 11, having a hollow tunnel 17 through the entire length of the body portion II. Exterior openings 16 of the tunnel 17 are located at each end of the body portion 11.
  • the size or diameter of the tunnel I7 is not particularly critical so long as it is essentially uniform throughout and sufficient to allow for unrestricted passage of gas therethrough.
  • the diameter of the tunnel opening 16 should be great enough to allow for insertion of oxygen supply tubes 24 and 25.
  • These supply tubes are preferably of catheter size, for example, having an external diameter of about 0.125 inches.
  • the upper surface 12 of the body portion 11 is flattened so as to provide a smooth surface for contacting the patients nostrils and exterior nasal septum, although it may be slightly outwardly curved.
  • the surface l2 not only provides for patient comfort, but, in addition and of more importance, prevents the cannula from turning or rotating thereby maintaining its proper position during use. Thus, with the flat surface engaging the anterior nares, the cannula does not tend to roll which would otherwise cause the tubular extensions to be displaced from within the nostrils.
  • the rear edge 20 of the upper surface 12 is preferably rounded to provide a smooth surface should it contact the nasolabial area between a patients upper lip and nostrils. This feature is also shown in FIG. 3.
  • the underside of lower surface 18 of the cannula body II as shown is shaped as the exterior diameter of the tunnel 17, but may have alternate form. However, in the interest of being lightweight and flexible, by molding the cannula 10 to have a general shape as shown, material requirements are minimized and simplified molding techniques may be utilized.
  • a pair of spaced tubular extensions 14 Integral with the cannula body I I and protruding or extending from the upper flat surface 12 are a pair of spaced tubular extensions 14. These extensions 14 are desirably curved, as shown, so that when placed within the nasal cavities (Note FIG. 3) they conform to the shape of the passageway as well as providing a smooth surface which may contact the delicate nasal membranes. It will be noted in FIG. 3 that the lower internal orifice 30 of each of the tubular extensions 14 open to the hollow tunnel 17 of the cannula body 11.
  • the tubular extensions 14 intersect with the upper flat surface 12 of the cannula body 1 l at an angle which is preferably obtuse with the plane of the surface 12.
  • the tubular extensions 14 are also preferably located at or near the forward edge of 22 of the surface I2, which location combined with the angle of intersection of the tubular extensions I4 with that surface provide maximum comfort to the patient and easy placement of the cannula extensions 14 into the nasal passageways.
  • the extensions 14 may be curved to any desired extent, it has also been found that for most patients having normal nasal passageway contours where the plane of the external gas directing orifices 15 is essentially normal to the plane of the flat surface 12, proper gas flow direction and maximum patient comfort will be achieved.
  • these tubular extensions 14 may be utilized depending on individual patient requirements. Yet, clue to the flexibility of these extensions 14 small angle deviation is possible by inserting the cannula extensions into the patients nostrils with concomitant movement of the extensions so as to conform to the patients nasal cavity.
  • the flaring is preferably uniform between the lower internal orifice 30 and upper exterior orifice 15, resulting in a reduced velocity gas flow from the external orifice 15 as compared to the velocity at which the gas enters the lower orifice 30.
  • the amount of flaring between the external orifice 15 and the internal orifice 30 may be varied to any desired extent with diameter ratios between about 221 and about 4:l respectively being preferred.
  • the size of the cannula is not particularly critical with the provision that the length and width of the upper flat surface 12 to be such that it will rest comfortably when placed on the patient.
  • a length of the surface 12 being between about 1% and about 2 inches will ensure that it will span the width of the nostrils.
  • the width of the flat surface 12, i.e., the distance between the edges 22 and 20 should be sufficient to provide a comfortable contact area with the nostrils and nasal septum, while at the same time, holding the cannula firmly in place when on the patient.
  • this distance should not be excessive which would otherwise cause edge 20 to engage the upper lip area excessively, resulting in discomfort or irritation.
  • tubular extensions 14 should be separated or spaced so that they are comfortable and can be easilyinserted into the nasal passages. It will be appreciated that such dimensional requirements will vary between individual patients depending on age, size, facial features, etc. Thus, cannula model sizes may be varied accordingly.
  • FIG. 4 illustrates a preferred manner in which the cannula is worn by a patient.
  • the cannula l rests across the patients nostril area (anterior nares) and the flexible oxygen supply tubes 24 and 25 are brought across the patients face, over and behind the ears, down the jaw areas and brought together under the chin.
  • a hollow sliding member 28 of sufficient size to encompass both tubes 24 and 25, may then be adjusted so that the cannula will remain firmly in place without the tubes being unduly taunt.
  • the cannula 10 may be easily removed by sliding the member 28 downwardly so that the supply tubes 24 and 25 become loosened. In this manner the cannula can be easily placed on a patient and removed without moving the patients head.
  • the oxygen supply tubes 24 and 25 may be fitted into a larger oxygen supply tube which in turn is connected to an oxygen source as will be understood by those skilled in the art.
  • the above-described invention provides an oxygen administration device which not only can be easily fitted to and removed from a patient, but which is of minimum discomfort and irritation to the patient.
  • the cannula essentially contacts only the exterior nostril area, its presence is realized to the minimum possible extent.
  • the patient may eat, talk, and move his head while the cannula remains firmly, yet comfortably, in place.
  • the fat upper surface which rests comfortably against the patients anterior nares prevents cannula rotation thereby maintaining its proper position with the gas directing tubular extensions located within the nostrils rather than slip ing out even though the supply tubes are rolled or tume somewhat.
  • the cannula also 0 ers the advantage of being simple in design, and in expensive to fabricate.
  • the composition of the cannula is preferably of the thermoplastic composition such as polyvinyl chloride or polyvinyl acetate which materials are understood to be quite pliable or flexible.
  • the cannula may be fabricated from a rubber composition or other flexible synthetic materials.
  • the cannula obviates the requirement of straps or bands thereby also simplifying manufacturing techniques and reducing costs.
  • the unitary device may be produced by a simple molding operation with the oxygen supply tubes then attached prior to or at the time of use.
  • a nasal cannula comprising:
  • an elongated body adapted to have minimal contact with a patients upper lip, said body having a tunnel extending through the length thereof terminating in an oxygen supply opening at each end, the body having a length sufficient to span the width of an average patients nostrils and an upper essentially flat surface portion being relatively thin in cross section for resting against a patient's anterior nares and a pair of spaced hollow tubular extensions'integral with and projecting upwardly from said flat surface which extensions terminate at a gas directing orifice and which hollow portion of said extensions communicate with said tunnel.
  • each of said extensions communicates with said tunnel at a first orifice and terminates at its opposite end in a gas directing orifice said gas directing orifice being larger than said first orifice.
  • the cannula of claim 1 having a flexible oxygen supply tube extending from each tunnel opening.
  • the cannula of claiml composed of a flexible material.
  • the cannula of claim 8 wherein the resin composition is selected from the group consisting of polyvinyl chloride and polyvinyl acetate. 7
  • the cannula of claim 1 wherein the length of said body is between about 1% and about 2 inches.
  • a nasal cannula for delivering oxygen containing gas comprising:
  • the cannula of claim 11 wherein the length of said upper body portion is between about 1% and about 2 inches.
  • the cannula of claim 11 having a flexible oxygen supply tube extending from said tunnel ends.

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  • Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hematology (AREA)
  • General Health & Medical Sciences (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Otolaryngology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Engineering & Computer Science (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Emergency Medicine (AREA)
  • Biophysics (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Nozzles (AREA)
  • Media Introduction/Drainage Providing Device (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
US878628A 1969-11-21 1969-11-21 Nasal cannula Expired - Lifetime US3643660A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US87862869A 1969-11-21 1969-11-21

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US3643660A true US3643660A (en) 1972-02-22

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US878628A Expired - Lifetime US3643660A (en) 1969-11-21 1969-11-21 Nasal cannula

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GB (1) GB1301690A (da)
NL (1) NL144488B (da)
ZA (1) ZA707356B (da)

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US3726275A (en) * 1971-12-14 1973-04-10 I Jackson Nasal cannulae
US3799164A (en) * 1971-08-12 1974-03-26 Du Pont Analgesic apparatus
US3802431A (en) * 1971-10-08 1974-04-09 Bard Inc C R Nasal cannula
US4120300A (en) * 1976-11-29 1978-10-17 City Of Hope National Medical Center Breathing apparatus
EP0153132A1 (en) * 1984-02-13 1985-08-28 Victoria Anne Forrest Surgical device for maintaining airways in the nasal passages
US4790308A (en) * 1984-04-04 1988-12-13 Sherwood Medical Company Nasal cannula harness
US5513634A (en) * 1994-05-06 1996-05-07 Chek-Med Systems, Inc. Combination integral bite block airway and nasal cannula
US5636630A (en) * 1996-07-25 1997-06-10 Miller; Wallace T. Respiratory device and method therefor
US20030000533A1 (en) * 2000-06-14 2003-01-02 Olsen Gregory James Breathing assistance apparatus
US20030030183A1 (en) * 2001-01-04 2003-02-13 Curti James N. Nasal and oral cannula breathing detection devices
US20030047185A1 (en) * 2001-09-13 2003-03-13 Olsen Gregory James Breathing assistance apparatus
US6533983B2 (en) * 2001-01-04 2003-03-18 Salter Labs Method to produce nasal and oral cannula apnea detection devices
US20030111080A1 (en) * 2000-06-14 2003-06-19 Olsen Gregory James Breathing assistance apparatus
US20030236480A1 (en) * 2002-06-24 2003-12-25 Landis Robert M. Preformed nasal septum skin barrier device
US20040016432A1 (en) * 2001-02-06 2004-01-29 Harald Genger Anti-snoring device, method for reducing snoring, and a nasal air cannula
US20040045552A1 (en) * 1997-04-29 2004-03-11 Curti James N. Nasal cannula
US20040112383A1 (en) * 2001-01-04 2004-06-17 Curti James N. Nasal and oral cannula breathing detection device
US6763832B1 (en) 1999-04-27 2004-07-20 Loma Linda University Medical Center Device and method for the administration of oxygen
US20040221846A1 (en) * 2001-01-04 2004-11-11 Curti James N. Nasal and oral cannula breathing detection device
US20050028820A1 (en) * 2001-11-05 2005-02-10 Smith Nicholas Charles Alan Nasal masks
US20050103347A1 (en) * 2001-01-04 2005-05-19 Curti James N. Nasal and oral cannula having two capabilities and method of producing same
US20060137690A1 (en) * 2003-02-21 2006-06-29 Gunaratnam Michael K Nasal assembly
US20060174886A1 (en) * 2001-01-04 2006-08-10 Curti James N Nasal and oral cannula having three or more capabilities and method of producing same
US20060283463A1 (en) * 2005-06-17 2006-12-21 Curti James N Nasal and oral cannula having two capabilities and method of producing same
US20080110456A1 (en) * 2006-11-10 2008-05-15 Encompas Unlimited, Inc. Bite block system and method
US20080135044A1 (en) * 2003-06-18 2008-06-12 Breathe Technologies Methods and devices for minimally invasive respiratory support
US20080216838A1 (en) * 2003-08-18 2008-09-11 Menlo Lifesciences, Llc Method and device for non-invasive ventilation with nasal interface
US7448594B2 (en) 2004-10-21 2008-11-11 Ameriflo, Inc. Fluid regulator
US20090156953A1 (en) * 2007-05-18 2009-06-18 Breathe Technologies, Inc. Methods and devices for sensing respiration and providing ventilation therapy
US20090151719A1 (en) * 2004-02-04 2009-06-18 Breathe Technologies, Inc. Methods and devices for treating sleep apnea
US20090183739A1 (en) * 2008-01-18 2009-07-23 Menlolife, Inc. Methods and devices for improving efficacy of non-invasive ventilation
US20090260625A1 (en) * 2003-06-18 2009-10-22 Breathe Technologies, Inc. Methods, systems and devices for improving ventilation in a lung area
US7614401B2 (en) 2003-08-06 2009-11-10 Paul S. Thompson Nasal cannula assembly
US7617826B1 (en) 2004-02-26 2009-11-17 Ameriflo, Inc. Conserver
US7640932B2 (en) 1997-04-29 2010-01-05 Salter Labs Nasal cannula for acquiring breathing information
US20100043786A1 (en) * 2006-05-18 2010-02-25 Breathe Technologies Tracheostoma spacer, tracheotomy method, and device for inserting a tracheostoma spacer
US20100071693A1 (en) * 2008-08-22 2010-03-25 Breathe Technologies Methods and devices for providing mechanical ventilation with an open airway interface
US20100113956A1 (en) * 1997-04-29 2010-05-06 Salter Labs Nasal cannula for acquiring breathing information
US20100252040A1 (en) * 2009-04-02 2010-10-07 Breathe Technologies, Inc. Methods, systems and devices for non-invasive open ventilation with gas delivery nozzles within an outer tube
US20100252043A1 (en) * 2003-08-11 2010-10-07 Breathe Technologies, Inc. Method and arrangement for respiratory support for a patient airway prosthesis and catheter
US20100269834A1 (en) * 2003-08-11 2010-10-28 Breathe Technologies, Inc. Systems, methods and apparatus for respiratory support of a patient
US20110125052A1 (en) * 2008-01-25 2011-05-26 Salter Labs Respiratory therapy system including a nasal cannula assembly
US20110214676A1 (en) * 2009-09-03 2011-09-08 Breathe Technologies, Inc. Methods, systems and devices for non-invasive ventilation including a non-sealing ventilation interface with an entrainment port and/or pressure feature
US8146592B2 (en) 2004-02-26 2012-04-03 Ameriflo, Inc. Method and apparatus for regulating fluid flow or conserving fluid flow
US8567399B2 (en) 2007-09-26 2013-10-29 Breathe Technologies, Inc. Methods and devices for providing inspiratory and expiratory flow relief during ventilation therapy
US20140116447A1 (en) * 2012-10-31 2014-05-01 Vapotherm, Inc. Quiet nasal cannula
US8770193B2 (en) 2008-04-18 2014-07-08 Breathe Technologies, Inc. Methods and devices for sensing respiration and controlling ventilator functions
US8776793B2 (en) 2008-04-18 2014-07-15 Breathe Technologies, Inc. Methods and devices for sensing respiration and controlling ventilator functions
US8939152B2 (en) 2010-09-30 2015-01-27 Breathe Technologies, Inc. Methods, systems and devices for humidifying a respiratory tract
WO2015041547A1 (en) * 2013-09-23 2015-03-26 Fisher & Paykel Healthcare Limited Nasal cannula with turbulation elements
USD752735S1 (en) * 2013-10-08 2016-03-29 Koninklijke Philips N.V. Cannula nosepiece
US20160235953A1 (en) * 2015-02-16 2016-08-18 Cenefom Corp. Hemostatic equipment
US20160296378A1 (en) * 2015-04-13 2016-10-13 Emergency Medical Innovation LLC Nasal compression device
US9808182B2 (en) 2015-03-20 2017-11-07 Bohnas LLC Breathing detection apparatus
US20170333658A1 (en) * 2014-02-18 2017-11-23 Koninklijke Philips N.V. Headgear tubing assembly and integrated pressure sensing
US9962512B2 (en) 2009-04-02 2018-05-08 Breathe Technologies, Inc. Methods, systems and devices for non-invasive ventilation including a non-sealing ventilation interface with a free space nozzle feature
US10099028B2 (en) 2010-08-16 2018-10-16 Breathe Technologies, Inc. Methods, systems and devices using LOX to provide ventilatory support
US10252020B2 (en) 2008-10-01 2019-04-09 Breathe Technologies, Inc. Ventilator with biofeedback monitoring and control for improving patient activity and health
US20190167936A1 (en) * 2017-12-04 2019-06-06 Roger Cameron Love Nasal Cannula Clamping and Patient Monitoring System
USD886993S1 (en) 2019-02-19 2020-06-09 Teleflex Medical Incorporated Nasal cannula bolo
US10792449B2 (en) 2017-10-03 2020-10-06 Breathe Technologies, Inc. Patient interface with integrated jet pump
US11154672B2 (en) 2009-09-03 2021-10-26 Breathe Technologies, Inc. Methods, systems and devices for non-invasive ventilation including a non-sealing ventilation interface with an entrainment port and/or pressure feature
USD957622S1 (en) * 2019-10-16 2022-07-12 Aires Medical LLC Nasal cannula
US12042602B2 (en) * 2008-12-01 2024-07-23 Fisher & Paykel Healthcare Limited Nasal cannula

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Cited By (150)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3799164A (en) * 1971-08-12 1974-03-26 Du Pont Analgesic apparatus
US3802431A (en) * 1971-10-08 1974-04-09 Bard Inc C R Nasal cannula
US3726275A (en) * 1971-12-14 1973-04-10 I Jackson Nasal cannulae
US4120300A (en) * 1976-11-29 1978-10-17 City Of Hope National Medical Center Breathing apparatus
EP0153132A1 (en) * 1984-02-13 1985-08-28 Victoria Anne Forrest Surgical device for maintaining airways in the nasal passages
US4790308A (en) * 1984-04-04 1988-12-13 Sherwood Medical Company Nasal cannula harness
US5513634A (en) * 1994-05-06 1996-05-07 Chek-Med Systems, Inc. Combination integral bite block airway and nasal cannula
US5636630A (en) * 1996-07-25 1997-06-10 Miller; Wallace T. Respiratory device and method therefor
US20100113956A1 (en) * 1997-04-29 2010-05-06 Salter Labs Nasal cannula for acquiring breathing information
US7640932B2 (en) 1997-04-29 2010-01-05 Salter Labs Nasal cannula for acquiring breathing information
US20040045552A1 (en) * 1997-04-29 2004-03-11 Curti James N. Nasal cannula
US6763832B1 (en) 1999-04-27 2004-07-20 Loma Linda University Medical Center Device and method for the administration of oxygen
US20030111080A1 (en) * 2000-06-14 2003-06-19 Olsen Gregory James Breathing assistance apparatus
US20040035428A1 (en) * 2000-06-14 2004-02-26 Fisher & Paykel Healthcare Limited Breathing assistance apparatus
US20030000533A1 (en) * 2000-06-14 2003-01-02 Olsen Gregory James Breathing assistance apparatus
US7017576B2 (en) 2000-06-14 2006-03-28 Fisher & Paykel Healthcare Limited Breathing assistance apparatus
US20040221846A1 (en) * 2001-01-04 2004-11-11 Curti James N. Nasal and oral cannula breathing detection device
US20060174886A1 (en) * 2001-01-04 2006-08-10 Curti James N Nasal and oral cannula having three or more capabilities and method of producing same
US7364682B2 (en) 2001-01-04 2008-04-29 Salter Labs Nasal and oral cannula breathing detection device
US6830445B2 (en) 2001-01-04 2004-12-14 Salter Labs Nasal and oral cannula breathing detection devices
US7832400B2 (en) 2001-01-04 2010-11-16 Salter Labs Nasal and oral cannula having two capabilities and method of producing same
US20040112383A1 (en) * 2001-01-04 2004-06-17 Curti James N. Nasal and oral cannula breathing detection device
US20050103347A1 (en) * 2001-01-04 2005-05-19 Curti James N. Nasal and oral cannula having two capabilities and method of producing same
US7743770B2 (en) 2001-01-04 2010-06-29 Salter Labs Nasal and oral cannula having three or more capabilities and method of producing same
US20030030183A1 (en) * 2001-01-04 2003-02-13 Curti James N. Nasal and oral cannula breathing detection devices
US6533983B2 (en) * 2001-01-04 2003-03-18 Salter Labs Method to produce nasal and oral cannula apnea detection devices
US7337780B2 (en) 2001-01-04 2008-03-04 Salter Labs Nasal and oral cannula breathing detection device
US6533984B2 (en) * 2001-01-04 2003-03-18 Salter Labs Method to produce nasal and oral cannula breathing detection devices
US7080645B2 (en) * 2001-02-06 2006-07-25 Seleon Gmbh Anti-snoring device, method for reducing snoring, and a nasal air cannula
US20040016432A1 (en) * 2001-02-06 2004-01-29 Harald Genger Anti-snoring device, method for reducing snoring, and a nasal air cannula
US7905232B2 (en) 2001-09-13 2011-03-15 Fisher & Paykel Healthcare Limited Breathing assistance apparatus
US20030047185A1 (en) * 2001-09-13 2003-03-13 Olsen Gregory James Breathing assistance apparatus
US20050028820A1 (en) * 2001-11-05 2005-02-10 Smith Nicholas Charles Alan Nasal masks
US20060266362A1 (en) * 2001-11-05 2006-11-30 Smith Nicholas C A Nasal masks
US7096867B2 (en) 2001-11-05 2006-08-29 Fisher & Paykel Healthcare Limited Nasal masks
US20030236480A1 (en) * 2002-06-24 2003-12-25 Landis Robert M. Preformed nasal septum skin barrier device
US20080092905A1 (en) * 2003-02-21 2008-04-24 Resmed Limited Nasal assembly
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NL144488B (nl) 1975-01-15
ZA707356B (en) 1971-07-28
DE2055506A1 (de) 1971-06-09
GB1301690A (da) 1973-01-04
NL7016257A (da) 1971-05-25

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