US20130152935A1 - System, Method And Ventilation Interface For Providing Pressurized Breathable Gas To The Mouth And Nose Separately - Google Patents

Abstract

In accordance with at least one exemplary embodiment, a ventilation system for providing gas under a first pressure to the nose of a user and second pressure to the mouth of a user is disclosed. A ventilation system can include a flow generator that can be connected to a gas supply tube. The gas supply tube can be in fluid communication with a ventilation interface. At least a portion of the gas supply tube can have a divider within the channel of the tube forming a nasal passageway and an oral passageway. A nasal breathing chamber and an oral breathing chamber can be defined in the ventilation interface. The nasal breathing chamber can be in fluid communication with the nasal passageway. The oral breathing chamber can be in fluid communication with the oral passageway.

Description

RELATED APPLICATIONS
• This application is a continuation of U.S. patent application Ser. No. 12/341,198, filed Dec. 22, 2008, and claims priority under 35 U.S.C. §119(e), to U.S. Provisional Patent Application No. 61/008,558, filed Dec. 21, 2007, the entire contents of which are hereby incorporated by reference.
BACKGROUND
• Obstructive sleep apnea syndrome (commonly referred to as obstructive sleep apnea, sleep apnea syndrome, and/or sleep apnea) is a medical condition that includes repeated, prolonged episodes of cessation of breathing during sleep. During a period of wakefulness, the muscles of the upper part of the throat passage of an individual keep the passage open, thereby permitting an adequate amount of oxygen to flow into the lungs. During sleep, the throat passage tends to narrow due to the relaxation of the muscles. In those individuals having a relatively normal-sized throat passage, the narrowed throat passage remains open enough to permit an adequate amount of oxygen to flow into the lungs. However, in those individuals having a relatively smaller-sized throat passage, the narrowed throat passage prohibits an adequate amount of oxygen from flowing into the lungs. Additionally, a nasal obstruction, such as a relatively large tongue, and/or certain shapes of the palate and/or the jaw of the individual, further prohibit an adequate amount of oxygen from flowing into the lungs.
• An individual having the above-discussed conditions can stop breathing for one or more prolonged periods of time (e.g., ten seconds or more). The prolonged periods of time during which breathing is stopped, or apneas, are generally followed by sudden reflexive attempts to breathe. The reflexive attempts to breathe are generally accompanied by a change from a relatively deeper stage of sleep to a relatively lighter stage of sleep. As a result, the individual suffering from obstructive sleep apnea syndrome generally experiences fragmented sleep that is not restful. The fragmented sleep results in one or more of excessive and/or inappropriate daytime drowsiness, headache, weight gain or loss, limited attention span, memory loss, poor judgment, personality changes, lethargy, inability to maintain concentration, and depression.
• Other medical conditions can also prevent individuals, including adults and infants, from receiving an adequate amount of oxygen into the lungs. For example, an infant who is born prematurely can have lungs that are not developed to an extent necessary to receive an adequate amount of oxygen. Further, prior to, during and/or subsequent to certain medical procedures and/or medical treatments, an individual can be unable to receive an adequate amount of oxygen.
• Under these circumstances, it is known to use a ventilation interface to apply a positive pressure to the throat of the individual, thereby permitting an adequate amount of oxygen to flow into the lungs. In known ventilation interfaces, oxygen and/or room air containing oxygen is delivered through the mouth and/or nose of the individual.
• Existing types of positive pressure applied by the known ventilation interface include continuous positive airway pressure (CPAP), in which a positive pressure is maintained in the throat passage throughout a respiratory cycle, bi-level positive airway pressure (BiPAP), in which a relatively high positive pressure is maintained during inspiration and a relatively low positive pressure is maintained during expiration, and intermittent mechanical positive pressure ventilation (IPPV), in which a positive pressure is applied when apnea is sensed (i.e., the positive airway pressure is applied intermittently or non-continuously), automatic positive airway pressure (APAP), in which a positive pressure is automatically tuned to provide the minimum required to maintain an unobstructed throat passage on a breath-by-breath basis.
• Typical CPAP airflow generators can deliver air to patients at pressures between 4 and 20 cm H₂O. More specialized units can delivery pressures up to 25 or even 30 cm H₂O. Most patients typically require air delivered at pressures between 6 and 14 cm H₂O.
• One conventional ventilation interface for the application of positive pressure includes a face mask that covers both the nose and the mouth. U.S. Pat. No. 4,263,908 (Mizerak) discloses a nasal cannula having oral gas delivery means incorporated therein adapted to increase efficiency in providing gas, such as oxygen to a patient. U.S. Pat. No. 6,123,071 (Berthon-Jones et al) discloses a combination mouth and nasal mask for assisted respiration or CPAP. At least one other exemplary ventilation interface is disclosed by U.S. Patent Application Publications Nos. 2006/0124131 (Chandran et al.) and 2006/0174887 (Chandran et al.). Other face masks include configurations that cover only the nose or only the mouth. Standard masks have air supplied under pressure and use headgear or harnesses to hold the mask on a user.
SUMMARY
• According to at least one embodiment, a ventilation system can include a flow generator that can be connected to a gas supply tube having a channel. The gas supply tube can be in fluid communication with a ventilation interface. At least a portion of the gas supply tube can have a divider within the channel of the gas supply tube forming one or more nasal passageways and one or more oral passageway. One or more nasal breathing chambers and one or more oral breathing chambers can be defined in the ventilation interface. The one or more nasal breathing chambers can be in fluid communication with the one or more nasal passageways. The one or more oral breathing chambers can be in fluid communication with the one or more oral passageways. Therefore, breathable gas under a first pressure can be delivered to a wearer via the nose. Moreover, breathable gas under a second pressure can be delivered to the wearer via the mouth.
BRIEF DESCRIPTION OF THE FIGURES
• Advantages of embodiments of the present invention will be apparent from the following detailed description of the exemplary embodiments thereof, which description should be considered in conjunction with the accompanying drawings in which:
• FIG. 1A is a perspective view of an exemplary “hybrid” mask and an exemplary supply tube connected thereto.
• FIG. 1B is a cross-sectional view of the exemplary “hybrid” mask and the exemplary supply tube ofFIG. 1A illustrating a pair of exemplary valves.
• FIG. 1C is a cross-sectional view of the exemplary “hybrid” mask and the exemplary supply tube ofFIG. 1A illustrating another pair of exemplary valves.
• FIG. 1D is a cross-sectional view of the exemplary “hybrid” mask and the exemplary supply tube ofFIG. 1A illustrating yet another pair of exemplary valves.
• FIG. 2A is a perspective view of an exemplary full mask and an exemplary supply tube connected thereto.
• FIG. 2B schematically depicts a cross-sectional view of the exemplary full mask and the exemplary supply tube ofFIG. 2A where the exemplary supply tube is detached.
DETAILED DESCRIPTION
• Aspects of the invention are disclosed in the following description and related drawings directed to specific embodiments of the invention. Alternate embodiments may be devised without departing from the spirit or the scope of the invention. Additionally, well-known elements of exemplary embodiments of the invention will not be described in detail or will be omitted so as not to obscure the relevant details of the invention. Further, to facilitate an understanding of the description discussion of several terms used herein follows.
• The word “exemplary” is used herein to mean “serving as an example, instance, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments. Likewise, the terms “embodiments of the invention”, “embodiment” or “invention” do not require that all embodiments of the invention include the discussed feature, advantage or mode of operation.
• Embodiments can be designed to cooperate with nearly any ventilation interface that makes use of a cushion for sealing engagement with portions of a user's face. For examples, embodiments can be designed to cooperate with nasal masks, oral masks, full masks and “hybrid” masks (i.e. those masks having an oral cavity and nasal prongs) of various styles and shapes, as will be readily recognized by those having ordinary skill in the art.
• Embodiments described below and the principles thereof may be applied to, for example, ventilation interfaces disclosed in U.S. Patent Application Publication Nos. 2006/0124131 (Chandran et al.), 2006/0174887 (Chandran et al.), 2007/0221226 (Hansen et al.) and 2007/0272249 (Chandran et al.), the disclosures of which are incorporated by reference herein in their entireties.
• Referring generally toFIGS. 1A-1D, one exemplary ventilation interface can be similar in construction to a “hybrid” ventilation mask disclosed by, for example, U.S. Patent Application Publication No. 2006/0174887.Mask100 can havemask shell102 withport104 defined therein.Gas supply tube106 can extend frommask shell102 in fluid communication withport104.Gas supply tube106 can be a single piece of tubing. Alternatively,gas supply tube106 can be more than one piece. For example,gas supply tube106 may include various joints, including an elbow piece (not shown) extending fromport104, as one non-limiting example.Gas supply tube106 andport104 can be divided.Gas supply tube106 can be divided in whole or in part.
• Mask shell102 can be coupled to cushion108 for forming a seal around the mouth of a wearer when in use.Chin flap110 may also be provided.Top wall112 ofcushion108 can haveapertures114,116 for respectively receivingnasal prongs118,120, which can be nasal pillows or nasal inserts. As shown,nasal prongs118,120 can be nasal pillows.Nasal prongs118,120 can be received byapertures114,116, respectively, so as to maintain a substantially airtight seal.Mask shell102 can haveattachment points122 or any other type of connectors known to one having ordinary skill in the art for affixing headgear or straps (not shown) tomask100. Extending inside from dividedport104, the inside ofmask100 can have separatedbreathing chambers124,126 defined bydivider128.Divider128 can thus separate the inside ofmask100 into two cavities—nasal breathing chamber124 andoral breathing chamber126.Divider128 can be a one-piece or multi-piece construction.Divider128 can extend upwards behindapertures114,116 proximate the bottom side oftop wall112. Alternatively, a divider (or portion thereof) can extend back far enough to be proximate the skin between the base of the nose and the upper lip of a wearer when in use.Divider128 can be situated around the inner sides ofmask shell102 and cushion108 so as to form a substantially airtight seal. Breathable gas can be delivered fromnasal breathing chamber124 to the nostrils of a wearer vianasal pillows118,120. One or more expiration holes (not shown) can be defined throughmask shell102 for each of breathingchambers124,126 to allow a user to exhale waste gas from eachchamber124,126.
• Divider128 can be made of any suitable material and in any suitable shape, as will be readily appreciated by one having ordinary skill in the art. In at least one exemplary embodiment,divider128 can be made of the same material ascushion108. For example,divider128 can be made of an elastomeric material, such as a silicone elastomer. As shown,divider128 can be thickerproximate port104. Alternatively,divider128 may be uniformly thick or may have other portions of various thicknesses.Divider128 can be formed integral withcushion108 and suitably mated with the inside ofmask shell102 andport104.
• As another non-limiting example,divider128 can be made of a rigid plastic, which can also be the same material that maskshell102 is constructed of.Divider128 can be integral withmask shell102 and can be suitably mated withcushion108. Alternatively,divider128 can be made to be retrofitably applied to conventional masks.
• In another exemplary embodiment,divider128 can include a floor and one or more sidewalls (not shown) extending from the floor so as to form an enclosed structure aroundapertures114,116 defined intop wall112 ofcushion108.Divider128 can cooperate withmask shell102 to formnasal breathing chamber124.Divider128 can be any of a variety of shapes.
• Still referring toFIGS. 1A-1D, a flow generator (not shown) can be connected togas supply tube106 for delivering breathable gas to mask100.Gas supply tube106 can be of any suitable length. For illustrative purposes and in a non-limiting manner,gas supply tube106 is shown truncated. The flow generator can be a CPAP machine, a BiPAP machine, an IPPV machine, an APAP machine and the like known to one having ordinary skill in the art. Gas supply tube106 (or portions thereof) can be any flexible, thin-walled tubing known to one having ordinary skill in the art. Other portion or pieces ofgas supply tube106 may be more rigid. For example,gas supply tube106 may include rigid plastic pieces.
• At least a portion ofgas supply tube106 can includegas supply divider130.Gas supply tube106 can be fluidly coupled tomask100.Gas supply divider130 can split thegas supply tube106 intonasal channel132 andoral channel134 for delivering breathable gas tonasal breathing chamber124 andoral breathing chamber126, respectively.Gas supply divider130 can be planar, or, alternatively, non-planar. In at least one exemplary embodiment,gas supply divider130 can splitgas supply tube106 intochannels132,134 of substantially equal volume. Alternatively,gas supply divider130 can split gas supply tube intochannels132,134 of substantially different volumes. Accordingly,gas supply divider130 may span the diameter ofgas supply tube106 so as to form two substantially equal cross-sectional areas. Alternatively,gas supply divider130 may be positioned so as to form two unequal cross-sectional areas withingas supply tube106.Gas supply divider130 may also dividegas supply tube106 into more than two channels in other embodiments.
• Gas supply divider130 can be constructed of the same material as gas supply tube106 (or portions thereof).Gas supply divider130 can be made of a flexible plastic, as one non-limiting example.Gas supply divider130 can be equally thin-walled as gas supply tube106 (or portions thereof) or can be thicker and thus more rigid thangas supply tube106.
• Gas supply divider130 can be integrally formed with gas supply tube106 (or portions thereof). Alternatively,gas supply divider130 can be configured for insertion into gas supply tube106 (or portions thereof).Gas supply divider130 can be attached withingas supply tube106 or held withingas supply tube106 by a mating mechanism. For example,gas supply divider130 can include a ridge portion of a tongue-in-groove mating system. Lateral groove sections can thus be defined withingas supply tube106 for receiving the ridge portion.
• Still referring toFIGS. 1A-1D, breathable gas can be communicated throughnasal channel132 andoral channel134 at different pressures. Moreover, pressurized breathable gas fromnasal channel132 andoral channel134 can be directed tonasal breathing chamber124 andoral breathing chamber126, respectively. Accordingly, the pressurized breathable gas provided tonasal breathing chamber124 can be under a different pressure than the pressurized breathable gas provided tooral breathing chamber126.
• To provide breathable gas at different pressures tonasal breathing chamber124 andoral breathing chamber126, respectively, one or more valves or like mechanisms can be situated within or at any divided portion ofport104 orgas supply tube106. The one or more valves can be set to partially obstructchannels132,134 withingas supply tube106 or atport104. The one or more valves can be any valve known to one of ordinary skill in the art. Accordingly, one or more valves can regulate the flow of pressurized breathable gas throughchannels132,134. Alternatively, singularly or in conjunction, one or more valves can regulate the flow of pressurized breathable gas enteringbreathing chambers124,126. Valves can have positions ranging from fully opened to fully closed and any selectable position there between.
• Other mechanisms for controlling gas flow and/or pressure throughchannels132,134 can include providing walls having one or more openings, which may be fixed or adjustable. In other embodiments, walls having different gas permeabilities can be positioned withinchannels132,134. In further embodiments, any other methods or mechanisms for controlling gas flow and/or gas pressure known to those having ordinary skill in the art can be used. For example,nasal channel132 andoral channel134 can have different cross-sectional areas, which in itself can be used to regulate gas flow and/or pressure. Additionally, an external approach to changing the cross-sectional areas ofchannels132,134 can be applied, such as various clamps known to one having ordinary skill in the art. Valves and like mechanism for controlling gas flow and/or pressure may be used in combination.
• Separate channels132,134 under the control of one or more valves or like mechanisms can allow a doctor to prescribe different pressures or ranges of pressures of breathable gas to be received nasally and orally by a patient. The patient or doctor can adjust the pressure of the breathable gas coming to the patient's nose or mouth by selecting or adjusting the corresponding valve. This may allow the doctor and patient to form a consensus on an effective treatment that may be comfortable to the patient. For example, a doctor prescribing pressurized gas or a patient prescribed pressurized gas can adjust the nasal flow to 8 cm H₂O and the oral flow to 2 cm H₂O. Likewise, the doctor or patient can adjust the nasal flow to 4 cm H₂O and the oral flow to 6 cm H₂O and so on.
• Referring particularly toFIG. 1B,first valve236 can be disposed within any portion ofnasal channel132.Second valve238 can be disposed within any portion oforal channel134. As shown,first valve236 can be set to a greater dilation thansecond valve238. The greater the dilation ofvalves236,238, the greater the pressure of the breathable gas provided tochambers124,126, respectively.
• Referring particularly toFIG. 1C,first valve336 can be disposed within any portion ofnasal channel132 andsecond valve338 can be disposed within any portion oforal channel134. As shown,first valve336 can be set to provide less obstruction tonasal channel132 thansecond valve338 is set to provide tooral channel134. The less obstructedchannels132,134 are byvalves336,338, respectively, the greater the pressure of the breathable gas that passes through the passageways ofvalves336,338.
• Referring particularly toFIG. 1D,first valve436 can be disposed proximate the upper portion of dividedport104.Second valve438 can be disposed proximate the lower portion of dividedport104. As shown,first valve436 can be set to provide more obstruction to the entryway ofnasal breathing chamber124 thansecond valve438 is set to provide to the entryway oforal breathing chamber126. The greater the obstruction at the entryways of breathingchambers124,126, the lesser the pressure of breathable air in breathingchambers124,126.
• In at least one other exemplary embodiment, a valve feature or like mechanism for providing breathable gas under different pressures tonasal channel132 andoral channel134 can be part of a CPAP unit configured to interface with dividedgas supply tube106. In other embodiments, a divided Y connector can be coupled to gas supply tube where each tube extending from an arm of the Y connector leads to a separate CPAP unit for providing breathable gas under pressure to eachchannel132,134.
• In a further exemplary embodiment,mask100 can include a dividedport104 having at least two openings that may be in fluid communication with at least twogas supply tubes106. Each of thegas supply tubes106 may be in fluid communication with a single breathable gas supplying device or eachsupply tube106 can be connected to a different gas supplying device. Each of thegas supply tubes106 can deliver gas at the same pressures or alternatively, thegas supply tubes106 may also deliver gas at different pressures.Gas supply tubes106 may each have the same cross-sectional area or they can have different cross-sectional areas. Thegas supply tubes106 may also include valves or other desired pressure or flow regulating mechanisms known to one skilled in the art.
• In another exemplary embodiment, eachchannel132 and134 may include at least onedivider130, which can serve to a plurality of different channels. Each of the plurality ofchannels132 and134 may be in fluid communication with a single breathable gas supplying device or eachchannel132 and134 can be connected to a different gas supplying device. Each of thechannels132 and134 can deliver gas at the same pressures or alternatively, thechannels132 and134 may also deliver gas at different pressures.Channels132 and134 may each have the same cross-sectional area or they can have different cross-sectional areas. Additionally,channels132 and134 may also include valves or other desired pressure or flow regulating mechanisms known to one skilled in the art.
• Referring toFIGS. 2A and 2B, another exemplary ventilation interface in accordance with at least one other exemplary embodiment can be similar in construction to the full mask disclosed, for example, by U.S. Patent Application Publication No. 2007/0221226 (incorporated by reference above).Full mask500 can havemask shell502 withport504 defined therein.Gas supply tube506 can be a single piece of tubing. Alternatively,gas supply tube506 can be more than one piece. For example,gas supply tube506 may include various joints, including an elbow piece (not shown) extending fromport504, as one non-limiting example.Gas supply tube506 andport504 can be divided.Gas supply tube506 can be divided in whole or in part.
• Mask shell502 can be coupled to cushion508 for forming a seal around the nose and mouth of a wearer.Arm540 can extend frommask shell502 for contacting portions of a wearer's forehead.Arm540 can be made of more than one piece so as to be adjustable (as shown), or, alternatively, can be one-piece.Arm540 can havepad542 on the backside thereof for comfortably abutting against portion of a wearer's forehead.Mask shell502 and540 can haveattachment points522 for connecting headgear or straps (not shown) tomask500.
• Extending inside from dividedport504, the inside ofmask500 can have separatedbreathing chambers524,526 defined bydivider528.Divider528 can thus separate the inside ofmask500 into two cavities—nasal breathing chamber524 andoral breathing chamber526.Divider528 can be a one-piece or multi-piece construction.Divider528 can extend back far enough to be proximate the skin between the base of the nose and the upper lip of a wearer when in use.Divider528 can be situated around the inner sides ofmask shell502 and cushion508 so as to form a substantially airtight seal.
• Breathable gas can be delivered fromnasal breathing chamber524 to the nostrils of a wearer when in use. Breathable gas can be delivered fromoral breathing chamber526 to the mouth of a wearer when in use. One or more expiration holes544 can be defined throughmask shell502 for one or both of breathingchambers524,526 to allow a user to exhale waste gas from one or both ofchambers524,526.
• Divider528 can be made of any suitable material and in any suitable shape, as will be readily appreciated by one having ordinary skill in the art. In at least one exemplary embodiment,divider528 can be made of the same material ascushion508. For example,divider528 can be made of an elastomeric material, such as a silicone elastomer.Divider528 may be uniformly or non-uniformly thick.Divider528 can be formed integral withcushion508 and can be suitably mated with the inside ofmask shell502 andport504.
• As another non-limiting example,divider528 can be made of a rigid plastic, which can also be the same material that maskshell502 is constructed of.Divider528 can be integral withmask shell502 and can be suitably mated withcushion508. Alternatively,divider528 can be made to be retrofitably applied to conventional masks.
• Still referring toFIGS. 2A and 2B, a flow generator (not shown) can be connected togas supply tube506 for delivering breathable gas to mask500.Gas supply tube506 can be of any suitable length. For illustrative purposes and in a non-limiting manner,gas supply tube506 is shown truncated. The flow generator can be a CPAP machine, a BiPAP machine, an IPPV machine, an APAP machine and the like known to one having ordinary skill in the art. Gas supply tube506 (or portions thereof) can be any flexible, thin-walled tubing known to one having ordinary skill in the art. Other portion or pieces ofgas supply tube506 may be more rigid. For example,gas supply tube506 may include rigid plastic pieces.
• At least a portion ofgas supply tube506 can includegas supply divider530.Gas supply tube506 can be fluidly coupled tomask500.Gas supply divider530 can split thegas supply tube506 intonasal channel532 andoral channel534 for delivering breathable gas tonasal breathing chamber524 andoral breathing chamber526, respectively.Gas supply divider530 can be planar, or, alternatively, non-planar. In at least one exemplary embodiment,gas supply divider530 can split gas supply tube intochannels532,534 of substantially different volumes. Alternatively,gas supply divider530 can splitgas supply tube506 intochannels532,534 of substantially equal volume. Accordingly,gas supply divider530 may be positioned so as to faun two unequal cross-sectional areas withingas supply tube506. Alternatively,gas supply divider530 may span the diameter ofgas supply tube506 so as to form two substantially equal cross-sectional areas.Gas supply divider530 may also dividegas supply tube506 into more than two channels in other embodiments.
• Gas supply divider530 can be constructed of the same material as gas supply tube106 (or portions thereof).Gas supply divider530 can be made of a flexible plastic, as one non-limiting exampleGas supply divider530 can be equally thin-walled as gas supply tube506 (or portions thereof) or can be thicker and thus more rigid thangas supply tube506.
• Gas supply divider530 can be integrally formed with gas supply tube506 (or portions thereof). Alternatively,gas supply divider530 can be configured for insertion into gas supply tube506 (or portions thereof).Gas supply divider530 can be attached withingas supply tube506 or held withingas supply tube506 by a mating mechanism. For example,gas supply divider530 can include a ridge portion of a tongue-in-groove mating system. Lateral groove sections can thus be defined withingas supply tube506 for receiving the ridge portion.
• Still referring toFIGS. 2A and 2B, breathable gas can be communicated throughnasal channel532 andoral channel534 at different pressures. Moreover, pressurized breathable gas fromnasal channel532 andoral channel534 can be directed tonasal breathing chamber524 andoral breathing chamber526, respectively. Accordingly, the pressurized breathable gas provided tonasal breathing chamber524 can be under a different pressure than the pressurized breathable gas provided tooral breathing chamber526.
• To provide breathable gas at different pressures tonasal breathing chamber524 andoral breathing chamber526, respectively, one or more valves (not shown) or like mechanisms can be situated within or at any divided portion ofport504 orgas supply tube506. The one or more valves can be set to partially obstructchannels532,534 withingas supply tube506 or atport504. The one or more valves can be any valve known to one of ordinary skill in the art. Accordingly, one or more valves can regulate the flow of pressurized breathable gas throughchannels532,534. Alternatively, singularly or in conjunction, one or more valves can regulate the flow of pressurized breathable gas enteringbreathing chambers524,526. Valves can have positions ranging from fully opened to fully closed and any selectable position there between. Exemplary valves can be similar to any ofvalves236,238,336,338,436,438 described above, as will be readily recognized by one having ordinary skill in the art.
• In a further exemplary embodiment,mask500 can include a dividedport504 having at least two openings that may be in fluid communication with at least twogas supply tubes506. Each of thegas supply tubes506 may be in fluid communication with a single breathable gas supplying device or eachsupply tube506 can be connected to a different gas supplying device. Each of thegas supply tubes506 can deliver gas at the same pressures or alternatively, thegas supply tubes506 may also deliver gas at different pressures.Gas supply tubes506 may each have the same cross-sectional area or they can have different cross-sectional areas. Thegas supply tubes506 may also include valves or other desired pressure or flow regulating mechanisms known to one skilled in the art.
• In another exemplary embodiment, eachchannel532 and534 may include at least onedivider530, which can serve to form a plurality of different channels. Each of the plurality ofchannels532 and534 may be in fluid communication with a single breathable gas supplying device or eachchannel532 and534 can be connected to a different gas supplying device. Each of thechannels532 and534 can deliver gas at the same pressures or alternatively, thechannels532 and534 may also deliver gas at different pressures.Channels532 and534 may each have the same cross-sectional area or they can have different cross-sectional areas. Additionally,channels532 and534 may also include valves or other desired pressure or flow regulating mechanisms known to one skilled in the art.
• Other mechanisms for controlling gas flow and/or pressure throughchannels532,534 can include providing walls having one or more openings, which may be fixed or adjustable. In other embodiments, walls having different gas permeabilities can be positioned withinchannels532,534. In further embodiments, any other methods or mechanisms for controlling gas flow and/or gas pressure known to those having ordinary skill in the art can be used. For example,nasal channel532 andoral channel534 can have different cross-sectional areas, which in itself can be used to regulate gas flow and/or pressure. Additionally, an external approach to changing the cross-sectional areas ofchannels532,534 can be applied, such as various clamps known to one having ordinary skill in the art. Valves and like mechanism for controlling gas flow and/or pressure may be used in combination.
• In at least one other exemplary embodiment, a valve feature or like mechanism for providing breathable gas under different pressures tonasal channel532 andoral channel534 can be part of a CPAP unit configured to interface with dividedgas supply tube506. In other embodiments, a divided Y connector can be coupled to gas supply tube where each tube extending from an arm of the Y connector leads to a separate CPAP unit for providing breathable gas under pressure to eachchannel532,534.
• Separate channels532,534 under the control of one or more valves or like mechanisms can allow a doctor to prescribe different pressures or ranges of pressures of breathable gas to be received nasally and orally by a patient.
• The foregoing description and accompanying drawings illustrate the principles, preferred embodiments and modes of operation of the invention. However, the invention should not be construed as being limited to the particular embodiments discussed above. Additional variations of the embodiments discussed above will be appreciated by those skilled in the art.
• Therefore, the above-described embodiments should be regarded as illustrative rather than restrictive. Accordingly, it should be appreciated that variations to those embodiments can be made by those skilled in the art without departing from the scope of the invention as defined by the following claims.

Claims (20)

What is claimed is:

1. A respiratory mask comprising:

a respiratory interface having a gas entry port and having a plurality of gas receiving chambers;

a gas supply tube, wherein the gas supply tube is in fluid communication with the respiratory interface

wherein the plurality of gas receiving chambers includes a first gas receiving chamber and a second gas receiving chamber and the respiratory mask is structured to allow gas to flow from the gas supply tube into the first gas receiving chamber and the second gas receiving chamber at the same time.

2. The respiratory mask ofclaim 1, wherein the plurality of gas receiving chambers include a nasal breathing chamber and an oral breathing chamber.

3. The ventilation mask ofclaim 1, wherein the plurality of gas receiving chambers is configured to receive gas through a single gas entry port during use.

4. The respiratory mask ofclaim 1, wherein the plurality of gas receiving chambers are not in fluid communication to each other.

5. The respiratory mask ofclaim 1, wherein at least one of the plurality of gas receiving chambers includes a valve, which adjusts the fluid flow from the gas supply tube to at least one of the plurality of gas receiving chambers.

6. The respiratory mask ofclaim 2, wherein the respiratory interface includes a dividing wall that provides a substantially airtight seal between the nasal breathing chamber and the oral breathing chamber.

7. The respiratory mask ofclaim 1, wherein the respiratory interface includes nasal prongs that are adapted to enter at least one of the nostrils of a user.

8. The respiratory mask ofclaim 6, wherein the gas entry port abuts the dividing wall.

9. A respiratory mask comprising:

a respiratory interface having a gas entry port and having a first gas receiving chamber and a second gas receiving chamber;

a gas supply tube, wherein the gas supply tube is in fluid communication with the respiratory interface

wherein the respiratory interface has a dividing wall between the first gas receiving chamber and the second gas receiving chamber that is configured to separate the gas received through the gas entry port during use.

10. The respiratory mask ofclaim 9, wherein at least one of the gas receiving chambers includes a valve, which adjusts the fluid flow entering the gas receiving chamber.

11. The respiratory mask ofclaim 9, wherein the dividing wall provides a substantially airtight seal between the first gas receiving chamber and the second gas receiving chamber.

12. The respiratory mask ofclaim 9, wherein the dividing wall abuts the first gas receiving chamber and the second gas receiving chamber.

13. The respiratory mask ofclaim 9, wherein the respiratory mask is structured to allow the flow rate into at least one of the gas receiving chambers to be adjusted.

14. The respiratory mask ofclaim 9, wherein the respiratory mask includes nasal prongs that are adapted to enter at least one of the nostrils of a user.

15. The respiratory mask ofclaim 9, wherein the gas entry port abuts the dividing wall.

16. A respiratory mask comprising:

a respiratory interface having a gas entry port and having a plurality of gas receiving chambers;

a gas supply tube, wherein the gas supply tube is in fluid communication with the respiratory interface

wherein the respiratory interface has a dividing wall between the plurality of gas receiving chambers, wherein the dividing wall abuts the gas entry port.

17. The respiratory mask ofclaim 16, wherein at least one of the gas receiving chambers includes a valve, which adjusts the fluid flow entering the gas receiving chamber.

18. The respiratory mask ofclaim 16, wherein the respiratory mask is structured to allow the flow rate into at least one of the gas receiving chambers to be adjusted.

19. A respiratory mask comprising:

a respiratory interface having at least one gas entry port and having a plurality of gas receiving chambers;

at least one gas supply tube, wherein the gas supply tube is in fluid communication with the respiratory interface

wherein the respiratory mask is structured to allow the flow rate into at least one of the plurality of gas receiving chambers to be adjusted.

20. The respiratory mask ofclaim 19, wherein at least one of the plurality of gas receiving chambers includes a valve.

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