US20030062048A1 - Breathing assistance apparatus - Google Patents
Breathing assistance apparatus Download PDFInfo
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- US20030062048A1 US20030062048A1 US10/268,869 US26886902A US2003062048A1 US 20030062048 A1 US20030062048 A1 US 20030062048A1 US 26886902 A US26886902 A US 26886902A US 2003062048 A1 US2003062048 A1 US 2003062048A1
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- user
- gases
- interface
- pivot
- mask
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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
-
- 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
- A61M16/0057—Pumps therefor
- A61M16/0066—Blowers or centrifugal pumps
- A61M16/0069—Blowers or centrifugal pumps the speed thereof being controlled by respiratory parameters, e.g. by inhalation
-
- 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
- A61M16/021—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes operated by electrical means
- A61M16/022—Control means therefor
- A61M16/024—Control means therefor including calculation means, e.g. using a processor
-
- 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
- A61M16/0605—Means for improving the adaptation of the mask to the patient
- A61M16/0616—Means for improving the adaptation of the mask to the patient with face sealing means comprising a flap or membrane projecting inwards, such that sealing increases with increasing inhalation gas pressure
-
- 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
- A61M16/0605—Means for improving the adaptation of the mask to the patient
- A61M16/0616—Means for improving the adaptation of the mask to the patient with face sealing means comprising a flap or membrane projecting inwards, such that sealing increases with increasing inhalation gas pressure
- A61M16/0622—Means for improving the adaptation of the mask to the patient with face sealing means comprising a flap or membrane projecting inwards, such that sealing increases with increasing inhalation gas pressure having an underlying cushion
-
- 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
- A61M16/0605—Means for improving the adaptation of the mask to the patient
- A61M16/0633—Means for improving the adaptation of the mask to the patient with forehead support
-
- 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
- A61M16/0605—Means for improving the adaptation of the mask to the patient
- A61M16/0633—Means for improving the adaptation of the mask to the patient with forehead support
- A61M16/0638—Means for improving the adaptation of the mask to the patient with forehead support in the form of a pivot
-
- 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
- A61M16/0605—Means for improving the adaptation of the mask to the patient
- A61M16/0633—Means for improving the adaptation of the mask to the patient with forehead support
- A61M16/0644—Means for improving the adaptation of the mask to the patient with forehead support having the means for adjusting its position
- A61M16/065—Means for improving the adaptation of the mask to the patient with forehead support having the means for adjusting its position in the form of a pivot
-
- 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
-
- 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
- A61M16/109—Preparation of respiratory gases or vapours by influencing the temperature the humidifying liquid or the beneficial agent
-
- 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
- A61M16/14—Preparation of respiratory gases or vapours by mixing different fluids, one of them being in a liquid phase
- A61M16/16—Devices to humidify the respiration air
-
- 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
- A61M16/0683—Holding devices therefor
Definitions
- This invention relates to patient interfaces particularly though not solely for use in delivering CPAP therapy to patients suffering from obstructive sleep apnoea (OSA).
- OSA obstructive sleep apnoea
- FIGS. 9 to 11 the present invention is illustrated with a pivoting bridge member 300 and an adjustable pivot stop 302 .
- the bridge member 300 is attached to and pivots about pins 304 extending from in the side of the upwardly extending inlet conduit 306 of the mask 305 .
- the pins 304 engage with matching apertures 308 in the bridge member 300 .
- the pivot stop 302 may be adjusted into a number of predetermined positions whereby the angle to which the forehead rest member 300 can freely pivot is restricted. Accordingly the pivot stop 302 requires an adjustable engagement with the bridge member 300 .
- the engagement is provided with a locking clip 310 which engages with any one of a number of mating depressions or protrusions 312 in the bridge member 300 .
- the engagement could be provided by for example a friction engagement including some tensioned member (not shown) frictionally engaging the bridge member 300 .
- the tensioned member could be releasable to allow movement and engagable to fix the position. Further variations includes simply adjusting the pivot stop eg: its angel as opposed to moving it to vary the angle restriction.
- the angle (FIG. 10, 314) of movement is restricted to very little or a small range of movement with the forward rest cushion 314 positioned at the maximum distance away 315 from the axis of the inlet conduit 306 .
- the angle 314 of movement is much less restricted such that the cushion 316 may be pivoted to a position 318 much more proximate the inlet conduit 306 .
- the present invention consists in a device for delivering a supply of gases to a user comprising:
- a forehead support adapted to freely pivot in use over a restricted pivot angle about said interface and in use rest on the forehead of a user
- a pivot stop associated with said interface or said support, configured such that the extent of said restricted pivot angle determined by the relative adjustment or positioning of said pivot stop
- said interface is a mask and said mask and said support being configured to in use substantially seal against the face of said user without substantial pressure there to and deliver said gases to the nasal cavity and/or oral cavity and/or throat of said user.
- said pivot stop is adjustably engaged with or in relation to said forehead rest whereby said pivot angle is restricted by the relative position of said pivot stop to said interface.
- said adjustment or positioning relates to one of two or more predetermined adjustment settings or positions.
- said adjustment or positioning lies at any point within a predetermined angular range.
- said pivot stop may be frictionally engaged in a selected position with or in relation to said support.
- the improvement further comprising;
- a humidifier in fluid communication with said interface configured to variably humidifies said gases prior to delivery to said user.
- FIG. 1 is a block diagram of a humidified continuous positive airway pressure (system) as might be used in conjunction with the present invention
- FIG. 2 is an illustration of the nasal mask in use according to the preferred embodiment of the present invention.
- FIG. 3 shows a perspective view of the mask with cushion
- FIG. 4 is a cutaway view of the mask showing the cushion
- FIG. 5 is a cutaway view of the periphery of the outer membrane
- FIG. 6 is a cutaway view of the periphery of the mask body portion
- FIG. 7 shows the forehead rest in isolation
- FIG. 8 shows the pivoting forehead rest with a locking mechanism
- FIG. 11 is a cross section view of the friction engagement.
- the present invention provides improvements in the delivery of CPAP therapy.
- a patient interface is described which is quieter for the user to wear and reduces the side leakage as compared with the prior art
- the patient interface as described in the preferred embodiment of the present invention can be used in respiratory care generally or with a ventilator but will now be described below with reference to use in a humidified CPAP system
- the present invention can be applied to any form of patient interface including, but not limited to, nasal masks, oral masks and mouthpieces.
- the outer sheath 1112 fits in place over the cushion 1110 , holding it in place.
- the sheath 1112 is secured by a snap-fit to the periphery 1114 of the hollow body.
- the periphery 1114 is shown including an outer bead 1158 .
- the sheath 1112 includes a matching bead 1159 , whereby once stretched around the periphery, the two beads engage to hold the sheath in place.
- the invention is not limited to this form of sealing.
- the nasal mask 2102 includes a pivoting forehead rest 106 (seen in FIGS. 2 and 7).
- the attachment of the forehead rest 106 to the hollow body 102 effectively allows the forehead rest 106 to pivot towards and away from the user but with no lateral movement.
- pins 2130 are provided mounted on a base 2132 attached to the hollow body 102 . These pins 2130 are co-axial within cylinders 2131 mounted on a bridge member 2136 .
- the forehead rest described previously may include a weakened section at its base which allows the joining member to pivot from the hollow body.
- the bridge member extends up to the forehead of the user
- the mask may include a vertical upwardly extending inlet. In this case the member is hinged at its base to either side of the inlet passage Again the member would then extend to the forehead.
- the forehead rest 106 is shown with the pivoting action which can be locked in a single position.
- the bridge member 136 pivots by virtue of pins from the hollow body 102 co-operating with cylinders 131 on the bridge member 136 .
- the locking action is provided by an engaging clip 200 which is attached through an aperture at the base of the bridge member 136 .
- the lock and clip 200 has a number of ribs which engage with at least two ribs on the interior of the aperture which allows it to lock and place it in at least an upper position and a lower position. In the upper position the locking clip 200 is clear of the hallow body 102 and allows the bridge member 136 to pivot freely.
- this position provides the maximum off set of the upper section of the mask from the bridge of the patients nose.
- FIGS. 9 to 11 the present invention is illustrated with a pivoting bridge member 300 and an adjustable pivot stop 302 .
- the bridge member 300 is attached to and pivots about pins 304 extending from in the side of the upwardly extending inlet conduit 306 of the mask 305 .
- the pins 304 engage with matching apertures 308 in the bridge member 300 .
- the pivot stop 302 may be adjusted into a number of predetermined positions whereby the angle to which the forehead rest member 300 can freely pivot is restricted. Accordingly the pivot stop 302 requires an adjustable engagement with the bridge member 300 .
- the engagement is provided with a locking clip 310 which engages with any one of a number of mating depressions or protrusions 312 in the bridge member 300 .
- the engagement could be provided by for example a friction engagement including some tensioned member (not shown) frictionally engaging the bridge member 300 .
- the tensioned member could be releasable to allow movement and engagable to fix the position. Further variations includes simply adjusting the pivot stop eg: its angel as opposed to moving it to vary the angle restriction.
- the angle (FIG. 10, 314) of movement is restricted to very little or a small range of movement with the forehead rest cushion 314 positioned at the maximum distance away 315 from the axis of the inlet conduit 306 .
- the angle 314 of movement is much less restricted such that the cushion 316 may be pivoted to a position 318 much more proximate the inlet conduit 306 .
Abstract
A device for delivering a supply of gases to a user comprising: a patient interface, in use in fluid communication with the supply of gases, a forehead support adapted to pivot about the interface and in use rest on the forehead of a user. The pivot angle restricted in use by positioning or adjustment of a pivot stop on the support or interface. In one embodiment of the patient interface; a mask seals against the face of the user and deliver the gases to the nasal cavity and/or oral cavity and/or throat of said user without substantial pressure on the users face.
Description
- This is a Continuation-In-Part of PCr/NZ01/00110 filed on Jun. 14, 2001.
- This invention relates to patient interfaces particularly though not solely for use in delivering CPAP therapy to patients suffering from obstructive sleep apnoea (OSA).
- In the art of respiration devices, there are well known variety of respiratory masks which cover the nose and/or mouth of a human user in order to provide a continuous seal around the nasal and/or oral areas of the face such that gas may be provided at positive pressure within the mask for consumption by the user. The uses for such masks range from high altitude breathing (i.e. aviation applications) to mining and fire fighting applications, to various medical diagnostic and therapeutic applications.
- One requisite of such respiratory masks has been that they provide an effective seal against the user's face to prevent leakage of the gas being supplied. Commonly, in prior mask configurations, a good mask-to-face seal has been attained in many instances only with considerable discomfort for the user. This problem is most crucial in those applications, especially medical applications, which require the user to wear such a mask continuously for hours or perhaps even days. In such situations, the user will not tolerate the mask for long durations and optimum therapeutic or diagnostic objectives thus will not be achieved, or will be achieved with great difficulty and considerable user discomfort.
- U.S. Pat. No. 5,243,971 and U.S. Pat. No. 6,112,746 are examples of prior art attempts to improve the mask system. U.S. Pat. No. 5,570,689 and PCT publication No. WO 00/78384, and U.S. Pat. No. 6,119,693 are examples of attempts to improve the forehead rest.
- It is an object of the present invention to attempt to provide a patient interface which goes some way to overcoming the abovementioned disadvantages in the prior art or which will at least provide the industry with a useful choice.
- Referring particularly to FIGS.9 to 11 the present invention is illustrated with a
pivoting bridge member 300 and anadjustable pivot stop 302. Thebridge member 300 is attached to and pivots aboutpins 304 extending from in the side of the upwardly extendinginlet conduit 306 of themask 305. Thepins 304 engage with matching apertures 308 in thebridge member 300. - The
pivot stop 302 may be adjusted into a number of predetermined positions whereby the angle to which theforehead rest member 300 can freely pivot is restricted. Accordingly thepivot stop 302 requires an adjustable engagement with thebridge member 300. Preferably the engagement is provided with alocking clip 310 which engages with any one of a number of mating depressions orprotrusions 312 in thebridge member 300. Alternatively the engagement could be provided by for example a friction engagement including some tensioned member (not shown) frictionally engaging thebridge member 300. The tensioned member could be releasable to allow movement and engagable to fix the position. Further variations includes simply adjusting the pivot stop eg: its angel as opposed to moving it to vary the angle restriction. - For example as shown in FIG. 9 with the
pivot stop 302 in a forward position the angle (FIG. 10, 314) of movement is restricted to very little or a small range of movement with theforward rest cushion 314 positioned at the maximum distance away 315 from the axis of theinlet conduit 306. As shown in FIG. 11 with thepivot stop 302 in a backward position theangle 314 of movement is much less restricted such that the cushion 316 may be pivoted to a position 318 much more proximate theinlet conduit 306. - Accordingly in one aspect the present invention consists in a device for delivering a supply of gases to a user comprising:
- a user interface, in use in fluid communication with a supply of gases,
- a forehead support adapted to freely pivot in use over a restricted pivot angle about said interface and in use rest on the forehead of a user, and
- a pivot stop associated with said interface or said support, configured such that the extent of said restricted pivot angle determined by the relative adjustment or positioning of said pivot stop
- Preferably said interface is a mask and said mask and said support being configured to in use substantially seal against the face of said user without substantial pressure there to and deliver said gases to the nasal cavity and/or oral cavity and/or throat of said user.
- Preferably said pivot stop is adjustably engaged with or in relation to said forehead rest whereby said pivot angle is restricted by the relative position of said pivot stop to said interface.
- Preferably said adjustment or positioning relates to one of two or more predetermined adjustment settings or positions.
- Preferably said adjustment or positioning lies at any point within a predetermined angular range.
- Preferably said pivot stop may be locked in any one of a number of plurality of predetermined positions on or in relative to said support.
- Preferably said pivot stop may be frictionally engaged in a selected position with or in relation to said support.
- In a second aspect, in a CPAP system for delivering gases to a user the improvement comprising;
- a user interface for communicating said gases to said user accordingly to the device claimed in any of the proceeding claims.
- Preferably the improvement further comprising;
- a humidifier in fluid communication with said interface configured to variably humidifies said gases prior to delivery to said user.
- To those skilled in the art to which the invention relates, many changes in construction and widely differing embodiments and applications of the invention will suggest themselves without departing from the scope of the invention as defined in the appended claims. The disclosures and the descriptions herein are purely illustrative and are not intended to be in any sense limiting
- The invention consists in the foregoing and also envisages constructions of which the following gives examples.
- One preferred form of the present invention will now be described with reference to the accompanying drawings in which;
- FIG. 1 is a block diagram of a humidified continuous positive airway pressure (system) as might be used in conjunction with the present invention,
- FIG. 2 is an illustration of the nasal mask in use according to the preferred embodiment of the present invention,
- FIG. 3 shows a perspective view of the mask with cushion,
- FIG. 4 is a cutaway view of the mask showing the cushion,
- FIG. 5 is a cutaway view of the periphery of the outer membrane,
- FIG. 6 is a cutaway view of the periphery of the mask body portion,
- FIG. 7 shows the forehead rest in isolation,
- FIG. 8 shows the pivoting forehead rest with a locking mechanism,
- FIG. 9 is a perspective view of the mask showing the friction engagement,
- FIG. 10 is an alternate perspective view of the mask showing the friction engagement, and
- FIG. 11 is a cross section view of the friction engagement.
- The present invention provides improvements in the delivery of CPAP therapy. In particular a patient interface is described which is quieter for the user to wear and reduces the side leakage as compared with the prior art It will be appreciated that the patient interface as described in the preferred embodiment of the present invention can be used in respiratory care generally or with a ventilator but will now be described below with reference to use in a humidified CPAP system It will also be appreciated that the present invention can be applied to any form of patient interface including, but not limited to, nasal masks, oral masks and mouthpieces.
- With reference to FIG. 1 a humidified Continuous Positive Airway Pressure (CPAP) system is shown in which a patient1 is receiving humidified and pressurised gases through a
patient interface 2 connected to a humidified gases transportation pathway orinspiratory conduit 3. It should be understood that delivery systems could also be VPAP (Variable Positive Airway Pressure) and BiPAP (Bi-level Positive Airway Pressure) or numerous other forms of respiratory therapy.Inspiratory conduit 3 is connected to the outlet 4 of ahumidification chamber 5 which contains a volume ofwater 6.Inspiratory conduit 3 may contain heating means or heater wires (not shown) which heat the walls of the conduit to reduce condensation of humidified gases within the conduit.Humidification chamber 6 is preferably formed from a plastics material and may have a highly heat conductive base (for example an aluminium base) which is in direct contact with a heater plate 7 ofhumidifier 8.Humidifier 8 is provided with control means orelectronic controller 9 which may comprise a microprocessor based controller executing computer software commands stored in associated memory. -
Controller 9 receives input from sources such as user input means or dial 10 through which a user of the device may, for example, set a predetermined required value (preset value) of humidity or temperature of the gases supplied to patient 1 . The controller may also receive input from other sources, for example temperature and/or flowvelocity sensors connector 13 and heaterplate temperature sensor 14. In response to the user set humidity or temperature value input viadial 10 and the other inputs,controller 9 determines when (or to what level) to energise heater plate 7 to heat thewater 6 withinhumidification chamber 5. As the volume ofwater 6 withinhumidification chamber 5 is heated, water vapour begins to fill the volume of the chamber above the water's surface and is passed out of thehumidification chamber 5 outlet 4 with the flow of gases (for example air) provided from a gases supply means orblower 15 which enters the chamber throughinlet 16. Exhaled gases from the patient's mouth are passed directly to ambient surroundings in FIG. 1. -
Blower 15 is provided with variable pressure regulating means orvariable speed fan 21 which draws air or other gases throughblower inlet 17. The speed ofvariable speed fan 21 is controlled by electronic controller 18 (or alternatively the function ofcontroller 18 could carried out by controller 9) in response to inputs fromcontroller 9 and a user set predetermined required value (preset value) of pressure or fan speed viadial 19. - Mask
- According to a first embodiment of the present invention the patient interface is shown in FIG. 2 as a mask. This may be also a nasal mask, a full face mask, a oral mask endotracheal tube, nasal cannula or other breathing assistance interface as are known in the art. The mask includes a
hollow body 102 with aninlet 103 connected to theinspiratory conduit 3. Themask 2 is positioned around the nose of the user 1 with theheadgear 108 secured around the back of the head of the patient 1. The restraining force from theheadgear 108 on thehollow body 102 and theforehead rest 106 ensures enough compressive force on themask cushion 104, to provide an effective seal against the patient's face. - The
hollow body 102 is constructed of a relatively inflexible material for example, polycarbonate plastic. Such a material would provide the requisite rigidity as well as being transparent and a relatively good insulator. The expiratory gases can be expelled through a valve (not shown) in the mask, a simple vent (not shown), a further expiratory conduit (not shown), or any other such method as is known in the art. - Mask Cushion
- Referring now to FIGS. 3 and 4 in particular, the
mask cushion 1104 is provided around the periphery of thenasal mask 1102 to provide an effective seal onto the face of the user to prevent leakage. Themask cushion 1104 is shaped to approximately follow the contours of a patient's face. Themask cushion 104 will deform when pressure is applied by the headgear 1108 to adapt to the individual contours of any particular user. In particular, there is anindented section 1150 intended to fit over the bridge of the user's nose as well as a lessindented section 1152 to seal around the section beneath the nose and above the upper lip. - In FIG. 4 we see that the
mask cushion 1104 is composed of ainner foam cushion 1110 covered by anouter sealing sheath 1112. Theinner cushion 1110 is constructed of a resilient material for example polyurethane foam, to distribute the pressure evenly along the seal around the user's face. Theinner cushion 1110 is located around theouter periphery 1114 of theopen face 1116 of thehollow body 1102. Similarly theouter sheath 1112 may be commonly attached at its base 1113 to theperiphery 1114 and loosely covers over the top of theinner cushion 1110. - In the preferred embodiment shown in FIGS.3-6 the bottom of the
inner cushion 1110 fits into a generallytriangular cavity 1154 in thehollow body 1102. Thecavity 1154 is formed from aflange 1156 running mid-way around the interior of the hollow body. - The
outer sheath 1112 fits in place over thecushion 1110, holding it in place. Thesheath 1112 is secured by a snap-fit to theperiphery 1114 of the hollow body. In FIGS. 5-6 theperiphery 1114 is shown including anouter bead 1158. Thesheath 1112 includes amatching bead 1159, whereby once stretched around the periphery, the two beads engage to hold the sheath in place. However it will be appreciated the invention is not limited to this form of sealing. - Forehead Rest
- In the preferred embodiment of the present invention the nasal mask2102 includes a pivoting forehead rest 106 (seen in FIGS. 2 and 7). The attachment of the
forehead rest 106 to thehollow body 102 effectively allows theforehead rest 106 to pivot towards and away from the user but with no lateral movement. - In one form shown in FIG. 7, pins2130. are provided mounted on a
base 2132 attached to thehollow body 102. Thesepins 2130 are co-axial withincylinders 2131 mounted on abridge member 2136. - At the top end142 (around the user's forehead) of the
bridge member 136 harnessing slots 138 are provided which allow straps from the headgear to be inserted to secure the mask to the headgear. For the user's comfort one or more resilient cushions 140 are provided underneath a T-Section 142 at the top end 142 of thebridge member 136, which rest on the forehead of the user. The cushion 140 might be constructed of silicon or any foam materials as is known in the art for providing cushioning. - In a further embodiment the forehead rest described previously may include a weakened section at its base which allows the joining member to pivot from the hollow body. The bridge member extends up to the forehead of the user In a further alternative the mask may include a vertical upwardly extending inlet. In this case the member is hinged at its base to either side of the inlet passage Again the member would then extend to the forehead.
- In a still further embodiment shown in FIG. 8 the
forehead rest 106 is shown with the pivoting action which can be locked in a single position. As before thebridge member 136 pivots by virtue of pins from thehollow body 102 co-operating withcylinders 131 on thebridge member 136. The locking action is provided by an engagingclip 200 which is attached through an aperture at the base of thebridge member 136. The lock andclip 200 has a number of ribs which engage with at least two ribs on the interior of the aperture which allows it to lock and place it in at least an upper position and a lower position. In the upper position thelocking clip 200 is clear of thehallow body 102 and allows thebridge member 136 to pivot freely. In the lower position thelocking pin 200 engages with a cavity on the surface of the saidhollow body 102 which locks saidbridge member 136 at a predetermined angular position with respect to saidhollow body 102. In the preferred embodiment this position provides the maximum off set of the upper section of the mask from the bridge of the patients nose. - Referring particularly to FIGS.9 to 11 the present invention is illustrated with a pivoting
bridge member 300 and anadjustable pivot stop 302. Thebridge member 300 is attached to and pivots aboutpins 304 extending from in the side of the upwardly extendinginlet conduit 306 of themask 305. Thepins 304 engage with matching apertures 308 in thebridge member 300. - The
pivot stop 302 may be adjusted into a number of predetermined positions whereby the angle to which theforehead rest member 300 can freely pivot is restricted. Accordingly thepivot stop 302 requires an adjustable engagement with thebridge member 300. Preferably the engagement is provided with alocking clip 310 which engages with any one of a number of mating depressions orprotrusions 312 in thebridge member 300. Alternatively the engagement could be provided by for example a friction engagement including some tensioned member (not shown) frictionally engaging thebridge member 300. The tensioned member could be releasable to allow movement and engagable to fix the position. Further variations includes simply adjusting the pivot stop eg: its angel as opposed to moving it to vary the angle restriction. - For example as shown in FIG. 9 with the
pivot stop 302 in a forward position the angle (FIG. 10, 314) of movement is restricted to very little or a small range of movement with theforehead rest cushion 314 positioned at the maximum distance away 315 from the axis of theinlet conduit 306. As shown in FIG. 11 with thepivot stop 302 in a backward position theangle 314 of movement is much less restricted such that the cushion 316 may be pivoted to a position 318 much more proximate theinlet conduit 306.
Claims (9)
1. A device for delivering a supply of gases to a user comprising:
a user interface, in use in fluid communication with a supply of gases,
a forehead support adapted to freely pivot over a restricted pivot angle about said interface and in use rest on the forehead of a user, and
a pivot stop associated with said interface or said support, configured such that the extent of said restricted pivot angle determined by the relative adjustment or positioning of said pivot stop.
2. A device as claimed in claim 1 wherein said interface is a mask and said mask and said support being configured to in use substantially seal against the face of said user without substantial pressure there to and deliver said gases to the nasal cavity and/or oral cavity and/or throat of said user.
3. A device as claimed in claim 2 wherein said pivot stop is adjustably engaged with or in relation to said forehead rest whereby said pivot angle is restricted by the relative position of said pivot stop to said interface.
4. A device as claimed in claim 3 wherein said adjustment or positioning relates to one of two or more predetermined adjustment settings or positions.
5. A device as claimed in claim 3 wherein said adjustment or positioning lies at any point within a predetermined range.
6. A device as claimed in claim 4 wherein said pivot stop may be locked in any one of a number of plurality of predetermined positions on or in relative to said support.
7. A device as claimed in claim 5 wherein said pivot stop may be frictionally engaged in a selected position with or in relation to said support.
8. In a CPAP system for delivering gases to a user the improvement comprising
a user interface for communicating said gases to said user accordingly to the device claimed in any of the proceeding claims.
9. In a CPAP system as claimed in claim 8 the improvement further comprising
a humidifier in fluid communication with said interface configured to variably humidifies said gases prior to delivery to said user.
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/NZ2001/000110 WO2001095965A1 (en) | 2000-06-14 | 2001-06-14 | Breathing assistance apparatus |
NZ514750 | 2001-10-10 | ||
NZ51475001 | 2001-10-10 | ||
NZ519541 | 2002-06-12 | ||
NZ51954102 | 2002-06-12 |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/NZ2001/000110 Continuation WO2001095965A1 (en) | 2000-06-14 | 2001-06-14 | Breathing assistance apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
US20030062048A1 true US20030062048A1 (en) | 2003-04-03 |
Family
ID=26652287
Family Applications (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/267,279 Abandoned US20030089373A1 (en) | 2001-06-14 | 2002-10-09 | Breathing assistance apparatus |
US10/268,870 Expired - Lifetime US6832610B2 (en) | 2001-10-10 | 2002-10-10 | Breathing assistance apparatus |
US10/268,869 Abandoned US20030062048A1 (en) | 2001-06-14 | 2002-10-10 | Breathing assistance apparatus |
US10/886,443 Abandoned US20040244800A1 (en) | 2001-10-10 | 2004-07-07 | Breathing assistance apparatus |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/267,279 Abandoned US20030089373A1 (en) | 2001-06-14 | 2002-10-09 | Breathing assistance apparatus |
US10/268,870 Expired - Lifetime US6832610B2 (en) | 2001-10-10 | 2002-10-10 | Breathing assistance apparatus |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/886,443 Abandoned US20040244800A1 (en) | 2001-10-10 | 2004-07-07 | Breathing assistance apparatus |
Country Status (3)
Country | Link |
---|---|
US (4) | US20030089373A1 (en) |
EP (1) | EP1302212A3 (en) |
CA (1) | CA2407118A1 (en) |
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Also Published As
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US20030066531A1 (en) | 2003-04-10 |
US20040244800A1 (en) | 2004-12-09 |
US6832610B2 (en) | 2004-12-21 |
EP1302212A3 (en) | 2004-01-21 |
US20030089373A1 (en) | 2003-05-15 |
EP1302212A2 (en) | 2003-04-16 |
CA2407118A1 (en) | 2003-04-10 |
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