JP2013163076A - Elbow for mask assembly - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotatable elbow capable of smoothly performing air intake and exhaust of CO, and a mask assembly.SOLUTION: An elbow for respiratory masks includes: (a) a first portion connected to an air supply conduit; (b) a second portion connected to a frame (10) of the respiratory mask (5); and (c) a vent hole for leading air out to an ambient atmosphere from the inside of the respiratory mask. A baffle (161) has at least one bending portion at an end of the second portion, and the baffle is configured to be able to lead an exhaust gas out, in a second direction which is substantially opposite to a first direction and is substantially parallel with a second axial line, from a nasal breathing cavity through the vent hole.

Description

  No. 60 / 424,695, filed Nov. 8, 2002, US Patent Application Serial No. 60, filed Jun. 3, 2003. No./474,928 and US patent non-preliminary serial number 10 / 235,846 filed on September 6, 2002. US patent non-preliminary serial number 10 / 235,846 is a US patent preliminary application serial number 60 / 317,486 filed September 7, 2001, and The priority of US Patent Preliminary Application Serial No. 60 / 342,854, filed on the 28th of the month, is claimed. The contents of these documents are incorporated herein for reference.

  The present invention relates to a mask system for non-invasive positive airway pressure (NPPV) treatment and continuous positive airway pressure (CPAP) for sleep breathing disorders (SDB) such as sleep apnea (OSA). It relates to mask frames and elbows that can be used together.

  The use of NPPV to process SDBs such as OSA was developed by Sullivan (see US Pat. No. 4,944,310. The contents of this document are hereby incorporated by reference in their entirety. Incorporated here). In this treatment device, a blower is used to supply pressurized air to the patient interface via an air supply conduit. The patient interface can be of various aspects. For example, it can be a mask assembly for the nose or a mask assembly for the nose and mouth. Patients must wear a mask all night while sleeping to receive treatment.

  The mask typically includes a rigid shell or frame and a soft cushion for face contact. The cushion ensures a space between the frame and the patient's face. The cushion forms a seal against the patient's face. The frame and the cushion form a cavity for receiving the nose or a cavity for receiving the nose and mouth. The mask is held in place by the headgear. The headgear typically includes a strap that is wrapped around the patient's occipital region through both sides of the patient.

  A document by Kwok et al. (US Pat. No. 6,112,746) discloses a nasal mask and a mask cushion. The contents of this document are incorporated herein in their entirety for reference. The mask cushion has a substantially triangular frame. The membrane extends from this frame. The mask frame has a waveform edge. The mask cushion is fixed to the mask frame by the waveform edge. The membrane has an opening for receiving the patient's nose. The membrane is spaced from the rim of the frame, and the outer surface of the membrane is substantially the same shape as the rim.

  A document by Frater et al. (PCT patent application AU01 / 00746 published as WO 01/97893) discloses a mask system for supplying air to a user. The contents of this document are incorporated herein in their entirety for reference. The mask system includes a suspension mechanism that allows relative movement between the cushion in contact with the face and the mask frame. The suspension mechanism also provides the cushion with a force as a function of the mask pressure, a force as a function of the cushion misalignment, and both.

During respiration cycle, the patient sucks the air mostly composed of a mixture of nitrogen and oxygen, to discharge the relatively large containing the mixed gas CO _2. In nasal mask systems where the patient breathes through the nose, CO ₂ can accumulate in the mask cavity. This can cause undesirable CO ₂ re-intake. Accordingly, various vent holes have been developed for use in masks. The amount of CO ₂ in the mask cavity is a function of the shape of the vent hole, the shape of the mask, the flow pattern in the mask, and the amount of dead space in the mask cavity.

  The mask is typically connected to the air supply conduit using frictional engagement. Typically, the length of the air supply conduit will be at least 1 meter due to the blower being placed by the patient's bed. In some cases, movement of the air supply conduit can break the seal. Furthermore, some patients prefer the conduit to be in a certain placement situation (eg, a placement situation through the figure). However, other patients prefer to place the conduit in other placement situations (eg, left or right). Therefore, a swivel elbow has been developed for several masks.

  A swivel elbow typically includes: (I) A cylindrical first portion having an axis aligned in a first direction and configured to be connectable to an air supply conduit. (Ii) A cylindrical second portion having an axis aligned in the second direction and configured to be connectable to the mask frame.

  The first direction and the second direction are typically perpendicular to each other. The first portion has an outer diameter that is slightly smaller than the inner diameter of a typical air supply conduit tube. As a result, the tube can fit outside the first portion and be held in place by friction. The free end of the second part is configured to pass through an orifice in the mask frame. Such known swivel elbows typically have vent holes. Some vent holes are simply holes. This is the case for example with the SOFTFIT® mask (FIG. 10a) from Puritan-Bennett. However, there are also more complicated vent holes. It is used, for example, in the ULTRA MIRAGE® mask by ResMed.

For example, SOFTFIT (registered trademark) mask (Fig. 10a) by Puritan-Bennett,
Traditional swivel elbow with simple vent holes, such as CONTOUR-DELUXE® (Fig. 10c) by Respironics and related ADVANTAGE® elbow (Fig. 10b) by Tiara The problem with this is that the air from the blower passes through the mask in a short circuit and directly through the vent hole. This is particularly problematic when the patient is receiving supplemental oxygen due to the high cost of oxygen. Most of the oxygen supplied to the elbow simply passes through the vent hole without entering the mask.

FIGS. 8a, 8b, 9a, 9b show conventional elbows in each of the STANDARD® and MODULAR® masks manufactured by ResMed Limited. Figures 8c, 8d, 9c and 9d are ULTRA manufactured by ResMed Limited.
Figure 2 shows a conventional elbow in each of a MIRAGE (R) mask and a MIRAGE VISTA (R) mask. FIGS. 11 a-11 f show a conventional elbow in each of the WHISPER swivel I, II® masks manufactured by Respironics. 12 and 13 show a SERENITY® mask manufactured by DeVilbiss, which is a prior art. In this case, a baffle (B) for re-introducing the inflow gas is provided inside the nasal cavity.

Masks with gusseted cushions require larger cavities compared to equivalent masks without gussets, thus increasing dead space. Therefore, in a mask assembly with gussets, special attention must be paid to the ventilation of the mask so that CO ₂ can be exhausted sufficiently by the continuous inflow of fresh air.

  The mask can be used while the user is asleep and can also reduce or eliminate noise from all sources, including noise caused by exhausting gas from the mask. desirable.

  A document by Kwok (PCT patent application AU98 / 00067 published as WO 98/34665 pamphlet) discloses a mask and a vent hole. The contents of this document are incorporated herein in their entirety for reference. In one aspect, the vent hole comprises a soft and flexible insertion member having a series of holes.

  A connector is disclosed in a document by Drew et al. (PCT patent application AU00 / 00636 published as WO 00/78381 pamphlet). The contents of this document are incorporated herein in their entirety for reference. The connector has a mask end connected in fluid communication with the interior of the breathing mask, and is disposed at an angle with respect to the mask end and is fluid to the outlet of the breathable gas supply conduit. A supply conduit end for communicatively connecting. The connector further includes a gas exhaust vent passage. The entrance of this passage is adjacent to or forms part of the mask end that is capable of fluid communication with the interior of the respiratory mask. The outlet of the gas exhaust vent passage has an inner surface that forms a smooth extension with respect to the adjacent outer surface of the connector. The outlet of the vent hole is arranged in the connector farther from the mask end. The vent hole outlet has a cross-section that is generally partially annular. The outlet of the vent hole directs the exhaust gas in a supply conduit in an orientation that is substantially perpendicular to the longitudinal axis of the mask end and substantially parallel to the longitudinal axis of the supply conduit. It is comprised so that it can guide toward an edge part.

  The article by Moore et al. (Filed Aug. 12, 2002, co-pending US Patent Preliminary Serial No. 60 / 502,509) includes a swivel elbow with a vent hole. A mask system provided is described. The contents of this document are incorporated herein in their entirety for reference.

  Correa et al. (US Pat. No. 6,119,694) discloses a nasal mask assembly with a small nostril seal. The mask assembly includes a conduit receiving member for attachment to a gas supply tube. A hole is formed downstream of the conduit receiving member, and the hole receives a stem having an opposing flange. The flange separates the incoming gas into a plurality of channels. Thereby, the inflow gas is supplied to each of the plurality of space regions in the nostril seal.

US Patent Preliminary Application Serial No. 60 / 424,695 US Patent Preliminary Application Serial No. 60 / 474,928 US patent non-preliminary serial number 10 / 235,846 US Patent Preliminary Application Serial No. 60 / 317,486 US Patent Preliminary Application Serial No. 60 / 342,854 US Pat. No. 4,944,310 US Pat. No. 6,112,746 International Publication No. 01/97893 Pamphlet PCT patent application AU01 / 00746 specification International Publication No. 98/34665 Pamphlet PCT patent application AU98 / 00067 International Publication No. 00/78381 Pamphlet PCT patent application AU00 / 00636 specification US Patent Preliminary Application Serial No. 60 / 502,509 Specification US Pat. No. 6,119,694

The vent holes and connectors described in the various documents above provide for proper intake and exhaust of breathable air / gas for masks that have a small dead space, such as no gusset. However, for masks with a large dead space, eg with gussets, air intake and CO ₂ emissions can be inadequate. Accordingly, there is a need in the art for a pivotable elbow and mask assembly that can overcome the above problems.

  A first aspect of the present invention is to provide an elbow for a mask that has an improved distribution pattern for inflow and outflow.

  A second aspect of the present invention is to provide an elbow with a baffle.

  A third aspect of the present invention is to provide an elbow for the mask, such as comprising an outlet port for the mask and a baffle extending from the elbow into the mask cavity. .

  Another aspect of the present invention is a swivel elbow with a lead-out port for the mask, with a structure that can ensure that fresh air from the blower does not reach the vent hole directly. Is to provide a swivel elbow.

  Another aspect of the present invention is to provide a pivotable elbow assembly that is easy to assemble and disassemble.

  Another aspect of the present invention provides a mask assembly using an elbow assembly that may allow better intake of breathable air and / or better exhaust air removal. It is to be.

  Another aspect of the present invention is to provide a mask assembly using an elbow assembly that is quieter for the user and / or bedmate.

  Another aspect of the present invention is an elbow assembly for a respiratory mask comprising an elbow, the elbow being engageable with a gas supply tube, and the other being removably connected to the mask. And providing an elbow assembly as provided. The elbow further forms an inlet port for introducing inflow gas into the nasal respiratory cavity formed by the mask and a lead-out port isolated from the inlet port by a curved baffle.

Another aspect of the present invention is an elbow for a mask comprising (i) a portion for connection to a gas supply tube, (ii) a portion connected to a mask cavity, and (iii) An introduction port for introducing the inflow gas into the breathing cavity; (iv) a lead-out port for discharging CO ₂ ; and (v) a baffle for isolating the lead-in port and the lead-out port. It is to provide an elbow.

  Another aspect of the present invention is to provide a baffle that can be used with the elbow and mask assembly that can guide the inflow and outflow flow of the mask assembly.

  A further aspect of the present invention is to provide a mask assembly comprising a mask frame, a mask cushion and an elbow assembly.

1 is an exploded cross-sectional view of a respiratory mask assembly according to an embodiment of the present invention. It is sectional drawing shown in the state which assembled the respiratory mask assembly of FIG. It is a perspective view which shows the ring in one Embodiment of this invention. FIG. 3 is a cross-sectional view showing a frame in the respiratory mask assembly of FIG. 2. 1 is a cross-sectional view illustrating one embodiment of a swivel elbow according to the present invention. 4b is a front view of the swivel elbow of FIG. 4a. FIG. 4b is a cross-sectional view showing in detail the lower part of the baffle in the swivel elbow of FIG. 4b. FIG. 6 is a perspective view showing a pivotable elbow according to another embodiment of the present invention. FIG. 6 is a perspective view showing a pivotable elbow according to another embodiment of the present invention. FIG. 3 is a front view showing the respiratory mask assembly of FIG. 2. FIG. 5b is a left side view of the respiratory mask frame of FIG. 5a. FIG. 5b is a right side view of the respiratory mask assembly of FIG. 5a. FIG. 5b is a top view of the respiratory mask assembly of FIG. 5a. FIG. 5b is a front view of the respiratory mask frame of FIG. 5a. FIG. 6b is a rear view of the respiratory mask frame of FIG. 6a. FIG. 6b is a front perspective view of the respiratory mask frame of FIG. 6a. FIG. 6b is a rear perspective view of the respiratory mask frame of FIG. 6a. FIG. 6b is a cross-sectional view taken along line 6e-6e in the respiratory mask frame of FIG. 6a. 6b is a right side view of the respiratory mask frame of FIG. 6a. FIG. 6b is a cross-sectional view taken along line 6g-6g in the respiratory mask frame of FIG. 6b. FIG. FIG. 6b is a cross-sectional view taken along line 6h-6h in the respiratory mask frame of FIG. 6a. FIG. 6b is a cross-sectional view taken along line 6i-6i in the respiratory mask frame of FIG. 6b. FIG. 6B is a cross-sectional view taken along line 6j-6j in the respiratory mask frame of FIG. 6g. It is arrow sectional drawing along the 6k-6k line | wire in the mask frame for respiration of FIG. 6a. FIG. 6b is a bottom view of the respiratory mask frame of FIG. 6b. 6d is a detailed cross-sectional view of the outlet port in one embodiment of the respiratory mask frame of FIG. 6g. FIG. 4b is a front view of the front of the swivel elbow of FIG. 4a. FIG. 7b is an alternative front view of the swivel elbow of FIG. It is arrow sectional drawing along the 7c-7c line | wire in the swivel elbow of FIG. 7a. FIG. 7b is a right side view of the swivel elbow of FIG. 7a. 7b is a plan view showing the top surface of the swivel elbow of FIG. 7a. FIG. FIG. 7b is a cross-sectional view taken along line 7f-7f in the swivel elbow of FIG. 7b. 7b is a rear perspective view of the swivel elbow of FIG. 7a. FIG. FIG. 7b is a front perspective view of the swivel elbow of FIG. 7a. FIG. 7b is a bottom view of the swivel elbow of FIG. 7a. It is a rear view which shows the swivel elbow by a prior art. It is a rear view which shows the swivel elbow by a prior art. It is a rear view which shows the swivel elbow by related technology. It is a rear view which shows the swivel elbow by related technology. FIG. 8b is a cross-sectional view showing the front of the swivel elbow of FIG. 8a. FIG. 8b is a cross-sectional view showing the front of the swivel elbow of FIG. 8b. FIG. 8c is a cross-sectional view showing the front of the pivotable elbow of FIG. 8c. 8d is a cross-sectional view showing the front of the pivotable elbow of FIG. 8d. It is sectional drawing which shows the swivel elbow by a prior art. It is sectional drawing which shows the swivel elbow by related technology. It is sectional drawing which shows the swivel elbow by a prior art. It is a front view which shows the one part side surface in the swivel elbow by a prior art. FIG. 11b is a left side view of the swivel elbow of FIG. 11a. FIG. 11b is a cross-sectional view detailing a vent hole in the swivel elbow of FIG. 11a. It is a figure which decomposes | disassembles and shows a part in the swivel elbow by another prior art. FIG. 11d is a cross-sectional view of the swivel elbow of FIG. FIG. 11b is a bottom view of the swivel elbow of FIG. 11e. 1 is a rear view of a prior art respiratory mask assembly. FIG. FIG. 13 is a cross-sectional view taken along line 13-13 in the respiratory mask assembly of FIG. It is the perspective view seen from the front which shows the turnable elbow by other embodiment of this invention. It is a front view which shows the swivel elbow of FIG. FIG. 15b is a plan view of the swivel elbow of FIG. 15a. FIG. 15b is a bottom view of the pivotable elbow of FIG. 15a. FIG. 15b is a right side view of the swivel elbow of FIG. 15a. FIG. 15d is a left side view of the pivotable elbow of FIG. 15d. FIG. 15b is a cross-sectional view taken along line 15f-15f in the swivel elbow of FIG. 15e. FIG. 15b is a cross-sectional view taken along the line 15g-15g in the swivel elbow of FIG. 15a. FIG. 15b shows in detail a part of the swivel elbow of FIG. 15g. FIG. 15b is a front perspective view of the swivel elbow of FIG. 15a. FIG. 15b is a rear perspective view of the swivel elbow of FIG. 15a. It is the perspective view seen from the front which shows the turnable elbow by other embodiment of this invention. FIG. 16b is a rear perspective view of the swivel elbow of FIG. 16a. FIG. 16b is a front view of the swivel elbow of FIG. 16a. FIG. 17b is a plan view of the swivel elbow of FIG. 17a. FIG. 17b is a bottom view of the swivel elbow of FIG. 17a. FIG. 17b is a right side view of the pivotable elbow of FIG. 17a. FIG. 17b is a rear view of the swivel elbow of FIG. 17a. FIG. 18b is a cross-sectional view taken along line 17f-17f of the swivel elbow of FIG. 17e. FIG. 17b is a cross-sectional view taken along line 17g-17g in the swivel elbow of FIG. 17a. FIG. 17b shows in detail a part of the swivel elbow of FIG. 17g. FIG. 16b is a further perspective view of the swivel elbow of FIG. 16a from the front, with a slightly different angle. FIG. 16b is a perspective view of the swivel elbow of FIG. 16b as viewed from the back with a slightly different angle. It is the perspective view seen from the front which shows the turnable elbow by other embodiment of this invention. FIG. 18b is a rear perspective view of the swivel elbow of FIG. 18a. FIG. 18b is a front view of the pivotable elbow of FIG. 18a. FIG. 19b is a plan view of the swivel elbow of FIG. 19a. FIG. 19b is a bottom view of the pivotable elbow of FIG. 19a. FIG. 19b is a right side view of the swivel elbow of FIG. 19a. FIG. 19b is a rear view of the swivel elbow of FIG. 19a. FIG. 19b is a cross-sectional view taken along the line 19f-19f in the pivotable elbow of FIG. 19e. FIG. 19b is a cross-sectional view taken along the line 19g-19g in the swivel elbow of FIG. 19a. FIG. 19b shows in detail a part of the swivel elbow of FIG. 19g. 18b is a further perspective view of the swivel elbow of FIG. 18a from the front, with a slightly different angle. FIG. FIG. 18b is a further perspective view of the swivel elbow of FIG. 18b viewed from the back, with a slightly different angle. It is the perspective view seen from the front which shows the turnable elbow by other embodiment of this invention. FIG. 20b is a rear perspective view of the swivel elbow of FIG. 20a. FIG. 20b is a front view of the swivel elbow of FIG. 20a. FIG. 21b is a plan view showing the pivotable elbow of FIG. 21a. FIG. 21b is a bottom view of the swivel elbow of FIG. 21a. FIG. 21b is a right side view of the swivel elbow of FIG. 21a. FIG. 21b is a rear view of the swivel elbow of FIG. 21a. It is arrow sectional drawing along the 21f-21f line | wire in the swivelable elbow of FIG. 21e. It is arrow sectional drawing along the 21g-21g line | wire in the swivelable elbow of FIG. 21a. FIG. 21b shows in detail a part of the swivel elbow of FIG. 21g. FIG. 20b is a further perspective view of the swivel elbow of FIG. 20a viewed from the front at a slightly different angle. FIG. 20b is a further perspective view of the swivel elbow of FIG. 20b viewed from the back, with a slightly different angle. It is the perspective view seen from the front which shows the turnable elbow by other embodiment of this invention. FIG. 22b is a rear perspective view of the swivel elbow of FIG. 22a. FIG. 22b is a front view of the swivel elbow of FIG. 22a. FIG. 23b is a plan view showing the pivotable elbow of FIG. 23a. FIG. 23b is a bottom view of the swivel elbow of FIG. 23a. FIG. 23b is a right side view of the swivel elbow of FIG. 23a. FIG. 23b is a rear view of the swivel elbow of FIG. 23a. It is arrow sectional drawing along the 23f-23f line | wire in the swivelable elbow of FIG. 23e. FIG. 23b is a cross-sectional view along the line 23g-23g in the swivel elbow of FIG. 23a. FIG. 23b shows in detail a part of the swivel elbow of FIG. 23g. FIG. 22b is a further perspective view of the swivel elbow of FIG. 22a from the front, with a slightly different angle. FIG. 22b is a further perspective view of the pivotable elbow of FIG. 22b from the back, with a slightly different angle. It is the perspective view seen from the front which shows the turnable elbow by other embodiment of this invention. FIG. 24b is a rear perspective view of the swivel elbow of FIG. 24a. FIG. 24b is a front view of the swivel elbow of FIG. 24a. FIG. 25b is a plan view of the swivel elbow of FIG. 25a. FIG. 25b is a bottom view of the pivotable elbow of FIG. 25a. FIG. 25b is a right side view of the swivel elbow of FIG. 25a. FIG. 25b is a rear view of the swivel elbow of FIG. 25a. FIG. 25b is a cross-sectional view taken along line 25f-25f in the swivel elbow of FIG. 25e. FIG. 25b is a cross-sectional view along the line 25g-25g in the swivel elbow of FIG. 25a. FIG. 25b shows in detail a part of the swivel elbow of FIG. 25g. FIG. 24b is a further perspective view of the swivel elbow of FIG. 24a from the front, with a slightly different angle. FIG. 25b is a further perspective view of the swivel elbow of FIG. 24b, viewed from the back, at a slightly different angle. It is the perspective view seen from the front which shows the turnable elbow by other embodiment of this invention. FIG. 26b is a rear perspective view of the swivel elbow of FIG. 26a. FIG. 26b is a front view of the swivel elbow of FIG. 26a. FIG. 27b is a plan view showing the pivotable elbow of FIG. 27a. FIG. 27b is a bottom view of the swivel elbow of FIG. 27a. FIG. 27b is a right side view of the swivel elbow of FIG. 27a. FIG. 27b is a rear view of the swivel elbow of FIG. 27a. It is arrow sectional drawing along the 27f-27f line | wire in the swivel elbow of FIG. 27e. FIG. 27b is a cross-sectional view taken along line 27g-27g of the swivel elbow of FIG. 27a. FIG. 27b shows in detail a part of the swivel elbow of FIG. 27g. 26b is a further perspective view of the swivel elbow of FIG. 26a as viewed from the front at a slightly different angle. FIG. FIG. 26b is a further perspective view of the swivel elbow of FIG. 26b from the back, with a slightly different angle. It is the perspective view seen from the front which shows the turnable elbow by other embodiment of this invention. FIG. 28b is a rear perspective view of the swivel elbow of FIG. 28a. FIG. 28b is a front view of the swivel elbow of FIG. 28a. FIG. 29b is a plan view of the swivel elbow of FIG. 29a. FIG. 29b is a bottom view of the swivel elbow of FIG. 29a. FIG. 29b is a right side view of the swivel elbow of FIG. 29a. FIG. 29b is a rear view of the swivel elbow of FIG. 29a. It is arrow sectional drawing along the 29f-29f line | wire in the swivel elbow of FIG. 29e. FIG. 29b is a cross-sectional view taken along line 29g-29g in the swivel elbow of FIG. 29a. FIG. 29b shows in detail a part of the swivel elbow of FIG. 29g. FIG. 28b is a further perspective view of the swivel elbow of FIG. 28a from the front, with a slightly different angle. FIG. 28b is a further perspective view of the pivotable elbow of FIG. 28b from the back, with a slightly different angle. FIG. 6 is a side view showing a pivotable elbow according to another embodiment of the present invention. FIG. 30b is a right side view of the swivel elbow of FIG. 30a. FIG. 30b is a plan view of the swivel elbow of FIG. 30a. FIG. 30b is a bottom view of a portion of the swivel elbow of FIG. 30a.

  Other aspects, features and advantages of the present invention will become apparent upon reading the following detailed description of the preferred embodiment, which is merely exemplary and not limiting, with reference to the accompanying drawings. Will.

  FIG. 1 is an exploded cross-sectional view of a mask assembly (5) according to an embodiment of the present invention. The mask assembly (5) is intended to be worn by the user (1) and is intended to substantially surround the nose (3) of the user (1). The mask assembly (5) includes, for example, a mask frame (10), a pivotable elbow assembly (20) connected to the mask frame (10), and a cushion ( 30). The pivotable elbow assembly is configured to be coupled to an air tube (168) that supplies breathable gas to the user (1).

  The cushion (30) can substantially surround the user's nose (3) and surround the cushion (30) while minimizing and / or avoiding pressure application to sensitive areas on the user's face. It is comprised so that a pressure can be applied with respect to. Some parts of the user's face, such as the nasal bridge area, require particular attention to achieving a balance between pressure and seal. It is also desirable to provide a low bulk mask so that comfort can be improved for the user (1) by improving stability. It is also desirable to reduce forces that tend to rotate the mask assembly (5) relative to the user's face. Although the cushion (30) is illustrated as being used with a nasal mask assembly, the cushion may be with a full face mask or with a mask assembly for the nose and mouth. It can also be configured to be used.

  The cushion (30) includes a face contact side surface (38) and a face non-contact side surface (39). The face non-contact side surface (39) of the cushion (30) is engaged with the mask frame (10) at the points (34a and 34b). In connecting the cushion (30) to the mask frame (10) of the mask assembly (5), any type of connection system can be used. To illustrate, there are internal cushion clips or external cushion clips. They are used in Ultra Mirage® masks manufactured by ResMed. This is disclosed in US Pat. No. 6,412,487. The contents of this document are incorporated herein in their entirety for reference. The cushion (30) can be connected to the mask frame (10) permanently, detachably or reattachably. In other aspects related to the coupling of the cushion, for example, friction fit, adhesion, and tongue / groove mechanism can be used.

  The mask frame (10) includes at least one opening (42) configured to fit into the elbow assembly (20). The diameter of the aperture (42) is between about 20 mm and about 40 mm, more preferably between about 25 mm and about 30 mm, and most preferably about 28 mm, in the widest aspect. The opening (42) preferably has a generally circular shape. However, the opening (42) can be non-circular. Furthermore, the mask frame (10) can have a plurality of through holes. In that case, the through holes are surrounded by an elbow assembly (20) connected to the mask frame (10).

  FIG. 2 is a cross-sectional view of the mask assembly (5), connected to one embodiment of the mask frame (10), one embodiment of the cushion (30), and one embodiment of the present invention. 1 shows an embodiment of an elbow assembly (20). FIG. 2 further shows a vent hole cover (180) attached to the pivotable elbow (160). The vent hole cover (180) guides the exhaust air along the air tube. Therefore, noise can be minimized and interference with the bedmate can be avoided.

  The opening (42) can additionally comprise a ring (400). FIG. 3a is a perspective view showing the ring (400). The ring (400) includes an outer ring (310) and an inner ring (307). The inner ring (307) forms a passage (306). This passage (306) guides exhaust through the vent hole cover (180). For example, it guides the exhaust through the vent cavity (308). The outer ring (310) is attached to the inner ring (307) by at least one connecting arm (304). In the embodiment of FIG. 3a, the ring (400) comprises three connecting arms (304). It will be apparent to those skilled in the art that a different number of connecting arms (304) can be used.

  In one embodiment, the ring (400) is formed as an integral member with respect to the mask frame (10). In this embodiment, the inner diameter of the opening (42) is matched to the outer ring (310) (ie, the outer ring (310) is the inner diameter of the opening (42)). In another embodiment, the ring (400) is formed as a separate member from the mask frame (10) and can be removably engaged with the mask frame (10).

  Each connecting arm (304) can be substantially straight or can have a recess, notch or protrusion. In the embodiment shown in FIG. 3a, the connecting arm (304) has one notch (303) and a protrusion (305). The shape of the ring (400) is shown in FIG. 3b.

  FIG. 3b is a cross-sectional view showing a region surrounding the opening (42) of the mask frame (10). The opening (42) is surrounded by a flange (301) and a lip (300). The mask frame (10) in this embodiment further includes bumps (302). The flange (301), lip (300), and bump (302) are configured to engage the elbow assembly (20).

  In the embodiment shown in FIG. 3b, the outer ring (310) of the ring (400) is an integral member of the flange (301). Thereby, a penetration channel formed by the opening (42) of the mask frame (10) and a passage (306) of the ring (400) are formed. The diameter of the outer ring (310), in its broadest aspect, is between about 20 mm and about 40 mm, more preferably between about 25 mm and about 30 mm, and most preferably about 24 mm. The diameter of the passageway (306), in its broadest aspect, is between about 4 mm and about 12 mm, more preferably between about 6 mm and about 10 mm, and most preferably about 8 mm.

  Figures 4a and 4b show in more detail one embodiment of a swivel elbow (160). The swivel elbow (160) is rotatably connected to the mask frame (10) and is an air tube that supplies respirable air or gas that is pressurized from a blower (not shown). 168). A stem (166) configured to receive 168). In the illustrated embodiment, the stem (166) includes a member (165). The top of the member (165) is configured to engage the bottom of the vent hole cover (180).

  FIG. 4a is a cross-sectional view illustrating one embodiment of a pivotable elbow (160). In this embodiment, the pivotable elbow (160) includes a collar (173) that surrounds an end portion (169) of the elbow (160). The end portion (169) of the elbow (160) extends beyond the collar (173). This improves the alignment during assembly to the mask frame (10). In particular, the end portion (169) is configured to engage the notch (303) of the ring (400) (if used). The collar (173) is concentrically spaced from the end portion (169). Thereby, a receiving space (183) can be formed between the collar (173) and the end portion (169). The collar (173) is configured to engage the bump (302) when the pivotable elbow assembly (20) is attached to the mask frame (10). One example of a detachable swivel elbow connection is described in US Patent Application Serial No. 60 / 402,509, filed August 12, 2002. The contents of this document are incorporated herein in their entirety for reference.

To improve the CO ₂ emission properties in mask assembly (5), in particular, for example, improve the CO ₂ emission properties in mask assembly (5) having a large respiratory cavity such full face mask or gusseted cushion (35) In order to do so, a baffle (161) has been developed to separate the inlet port (162) and outlet port (164). The lead-out cavity (308) is also shown in FIG. 4a. The lead-out cavity (308) guides gas discharge to a vent hole cover (180) not shown in FIG. 4a. The depth of the baffle (161) is one of the structural parameters to be operated to improve the CO ₂ emissions. Various aspects of the elbow (160) and mask frame (10) can be manufactured, and the depth of the baffle can be any desired depth. In one embodiment of the invention, the mask frame (10) does not form the baffle (161), but the entire baffle depth is formed by the elbow (160). In other embodiments, the ring (400) increases the depth of the baffle (161), thereby improving the CO ₂ emission characteristics in the mask assembly with a large breathing cavity (35) (5) be able to.

  The pivotable elbow (160) includes an introduction port (162) and a lead-out port (164). The outlet port (164) is isolated from the inlet port (162) by a baffle (161) provided within the elbow (160) as shown in FIGS. 4a and 4b. The direction of the inlet port (162) and the direction of the outlet port (164) are determined so that the inflow gas indicated by the arrow (A) in the inlet port (162) moves along the outlet port (164) with an arrow ( The exhaust gas flow indicated by B) is chosen so as not to have a direct influence. Furthermore, the air / gas entering the elbow (160) is less likely to flow directly into the outlet port (164). This is because the baffle (161) guides the incoming air along a bent path. For example, it is guided along a route that is U-turned over about 180 °. After passing through such a path, the incoming air can exit through the outlet port (164).

  The baffle (161) is totally bent. FIG. 4b shows a baffle (161) according to one embodiment of the present invention. The baffle (161) has a generally sinusoidal shape and is arranged as being generally symmetrical about the center line (100). The baffle (161) includes two attachment points (150a, 150b) for the end portion (169), a central portion (152), and a bottom portion (155). The center line (100) intersects the bottom (155) of the baffle (161). The baffle (161) has an inner surface (153) and an outer surface (154), as shown in more detail in FIG. 4c.

  The baffle (161) includes at least one protrusion (163) that extends from the outer surface (154). The baffle (161) is arranged such that the inner ring (305) of the ring (400) is positioned near the inner surface (153) when the elbow assembly (20) is engaged with the mask frame (10). And arranged.

The shape of the baffle (161) has several advantages as follows. (I) Supply of inflow gas / air into the introduction port (162) is guided by the bottom (155) and / or the protrusion (163). Thereby, a more uniform distribution is provided to the user (1). (Ii) The bottom (155) is generally located below the user's nostril. Therefore, exhaust air (containing a large amount of CO ₂ ) is efficiently exhausted from the outlet port (164). (Iii) Noise caused by the user (1) is reduced.

  Another embodiment of the baffle (161) is shown in FIGS. 4d and 4e. In the embodiment shown in FIG. 4d, the baffle (161) does not comprise a protrusion (163). In the embodiment shown in FIG. 4e, the baffle (161) is inverted with respect to FIGS. 4b and 4d. In the embodiment shown in FIGS. 4b, 4d, 4e, the center line (100) is arranged in the vertical direction. However, within the scope of the present invention, the center line can be in the horizontal direction, or any angle between the vertical and horizontal directions.

  Various other baffle shapes are possible. For example, the baffle (161) can be M-shaped, C-shaped, or V-shaped. A further advantage of the baffle (161) according to embodiments of the present invention is that the cross-sectional area of the outlet flow path increases from the first end to the second end inside the mask in the vicinity of the outlet port (164). That is. Thereby, the speed of the air discharged through the outlet port (164) is slowed down when being discharged from the elbow (160). Or at least it won't be faster. This contributes to reducing the occurrence of noise based on the vent hole. Also, within the scope of the present invention, the elbow (160) can form a vent cavity, and the elbow (160) can have no vent cavity.

An embodiment of the invention with an M-shaped baffle and an increased vent cavity is shown in FIGS. 18a-19j. An embodiment of the invention with a V-shaped baffle and no vent cavity is shown in FIGS. 22a-23j. An embodiment of the invention with a C-shaped baffle and an increased vent cavity is shown in Figures 24a-25j. An embodiment of the invention with a V-shaped baffle and an increased vent cavity is shown in FIGS. 28a-29j. All baffle shape illustrated results in noise reduction effect, thereby improving the CO ₂ emission properties, and further has an optimized and / or small flow impedance. Within the scope of the present invention, the shape and orientation of the baffle (161) can be varied.

  As described above, the baffle (161) forms the introduction port (162). Air from the blower can flow through the introduction port (162). Further, the baffle (161) includes an outlet port (164) in the elbow (160). Air from the blower reaches the elbow (160) through the air tube (168). In the elbow (160), air flows through the inlet port (162) and is “injected” into the cavity (35) of the mask (10). Air flows continuously from the mask cavity (35), through the ring (400) to the outlet port (164) of the elbow (160) and is discharged to the ambient atmosphere.

  Although the embodiment shown in FIGS. 14a-15j does not include a baffle (161), it has another advantage of the present invention that it is less bulky. A “deep” baffle (161) for use in a mask assembly (5) with a large breathing cavity (35), forming one embodiment of the present invention, is shown in FIGS. 16a and 16b.

  FIGS. 30a-30d show a swivel elbow according to an alternative embodiment of the invention, similar to the embodiment shown in FIGS. 26a, 26b, 27a-27j. In this embodiment, two “C” shaped baffles (161) (FIG. 30c) are provided. Air flows from the blower through the stem (166) into the elbow, is bent and guided over approximately 90 °, and into the mask cavity via the introduction port (162) located in the center of the elbow. Inflow. (FIGS. 30b and 30d). Air from the mask cavity is led through outlet ports (164) located on both sides of the elbow and into the vent cavity (308) (FIGS. 30a, 30d).

  It is desirable that the outlet port (164) has a small flow impedance so that a sufficient exhaust flow can be ensured. One way to achieve this is to make the cross-sectional area of the outlet port (164) as large as possible. However, in a given elbow configuration, increasing the cross-sectional area of the outlet port (164) increases the cost of the inlet port (162). Further, it is desirable that the introduction port (162) has a flow impedance as small as possible. Therefore, in constructing the elbow (160), two contradictory construction goals must be considered.

  In one embodiment, the baffle (161) of the elbow (160) extends into the mask frame (10) and is molded as an integral member. In other embodiments, the baffle (161) is separated between the pivotable elbow (160) and the mask frame (10), and the combination of these two is sufficiently long relative to the baffle (161). Is offering. In the latter embodiment, the swivel elbow (160) is suitable for use with a shallow mask frame (10) that does not require one overall long baffle (161).

  In another aspect, the baffle (161) is partially formed by the elbow (160) and the remainder is formed by the frame (10). This configuration can be formed in various ways. It can also be implemented in various baffle shapes. If the baffle (161) is formed from a combination of elbow (160) and frame (10), the elbow configuration can be formed as a module for a variety of different mask systems. A circular ring (400) is added to the frame to form a baffle (161) from the combination of frame (10) and elbow (160).

  The ring (400) extends into the cavity (35) of the mask frame (10) and within the depth of the baffle (161). In this way, the tendency of fresh incoming air to shortcut the mask cavity (35) can be reduced. The end of the ring is located near the edge of the user's nose. Thus, this configuration facilitates the discharge of air from the nose toward the outlet port (164). The use of a ring (400) molded into the frame (10) eliminates the need to extend the baffle (161) of the pivotable elbow (160) into the mask frame (10). For mask assemblies with large cavities, elbows with long baffles are appropriate, but not for mask assemblies with shallow cavities. It can interfere with the patient's nose. Thus, by using a combination of a mask frame (10) with a ring (400) and an elbow (160) with a short baffle, the same for both a shallow cavity mask assembly and a deep cavity mask assembly. An elbow (160) can be used.

  In one aspect of the invention, the baffle (161) is formed in a cylindrical portion of the elbow (160) that is configured to be connectable to the frame. As shown in FIGS. 20a and 21a-21j, in the embodiment of the present invention, the baffle (161) forms a lead-out port (164) arranged in the center. Air from the blower is guided to the outside of the outlet port (164).

  In the configuration of the elbow (160), providing an angle between the two overall cylindrical portions of the elbow (160) provides the potential for dead spots in the blower air flow path. Potential dead spots in the blower air flow path are also related to the exhaust flow path. Accordingly, in one embodiment of the present invention, for example, as shown in FIGS. 4a to 4c, the exhaust flow path is arranged in the elbow (160) so as not to be a dead spot related to the blower flow. Accordingly, the cross-sectional area of the exhaust flow path can be increased without significantly affecting the impedance of the blower flow path and / or without causing the adverse effects of unwanted noise that may occur during exhaust. Thus, at the entrance of the mask cavity (35), the cross-sectional area of the exhaust flow path is 40% of the total cross-sectional area (equal to the sum of the area of the exhaust flow path and the area of the blower flow path). To 60%.

  Another advantage of the baffle (161) according to the present invention is that it does not provide a large flow impedance for blower flow. Although various baffle configurations are possible, configurations that obstruct the flow path provide great resistance to flow from the blower. This causes a large pressure drop along the elbow (160). The greater the pressure drop at the elbow, the more the blower must operate more eagerly to provide a given pressurized air. The greater the blower load, the more noise is generated by the blower. This makes it difficult for the patient to sleep.

  In one aspect of the invention, the elbow (160) comprises two cylindrical portions. A first portion having a first axis and configured to be coupled to the air supply tube (168); and configured to be coupled to the mask frame (10) and second. A second portion having a shaft; Here, the two axes are arranged at an internal angle of about 100 °. This is in contrast to the prior art elbow where the two corresponding axes are arranged at an internal angle of 90 °.

  A further advantage of the swivel elbow (160) according to the present invention is its low height (distance extending vertically from the frame). Such a reduction in the visual impact of the swivel elbow (160) reduces the bending moment of the swivel elbow (160) and reduces the “lever arm” effect of the swivel elbow (160).

  5a-5d are various views illustrating a respiratory mask assembly (10) according to one embodiment of the present invention. Figures 6a-6m show several views of the respiratory mask assembly (10). Figures 7a-7i are several views showing a pivotable elbow (160). The dimensions shown in FIGS. 5a-7i are a preferred illustration of this embodiment. These dimensions can be changed in a range of ± 20% or in a range of ± 10% depending on the embodiment.

  Other advantages of the pivotable elbow and mask frame (10) according to a preferred embodiment of the present invention are as follows. (I) The introduction area can be made sufficiently large and the shape can be optimized. This prevents the flow into the mask assembly (5) from being disturbed. (Ii) The derived area can be made sufficiently large. In addition, the lead-out area has a smooth shape, and there is no limit to the final smooth taper outlet. Thereby, exhaust can be made quiet. The latter advantage has been difficult to achieve in the prior art.

  Although the present invention has been described with reference to a nasal mask, the present invention is applicable to both a nose and mouth mask as well as a mouth mask. Further, although the present invention has been described with respect to a pivotable elbow (160), the present invention is applicable to a stationary elbow. In addition, while one aspect of the present invention applies to a cushion (30) with a gusset portion (32), other aspects of the present invention do not include a gusset portion (32). (30).

  From the foregoing, it will be appreciated that the various aspects of the invention are achieved completely and effectively. Some specific embodiments described above are intended to exemplify the frame principle and the functional principle of the present invention, and are not intended to limit the present invention in any way. On the contrary, the present invention is intended to cover all modifications, variations, and alternatives that do not depart from the spirit and scope of the present invention.

5 Mask assembly 10 Mask frame 20 Elbow assembly 30 Cushion 42 Opening 100 Center line 160 Swivel elbow 161 Baffle 162 Introduction port 164 Derivation port 168 Air tube, air supply tube 169 End portion (engagement portion)
173 Collar 180 Vent hole cover 183 Receiving space 301 Flange 303 Notch 305 Protrusion 307 Inner ring 310 Outer ring 400 Ring

Claims (29)

An elbow for a respirator,
The elbow
a) a first portion having a first axis and configured to be connectable to an air supply conduit;
b) a second portion having a second axis and configured to be connectable to a frame of the respiratory mask;
c) a vent hole constructed and arranged to be capable of deriving air from the interior of the respiratory mask to the ambient atmosphere;
Comprising
The elbow is further
i) an inlet port capable of supplying inflow gas in a first direction to the breathing cavity formed by the mask;
ii) an outlet port isolated from the inlet port by at least one baffle;
Form the
The baffle comprises at least one curved portion when viewed along an end of the second portion attached to the frame of the mask;
The baffle may allow exhaust gas to be led out from the nasal breathing cavity through the vent hole in a second direction substantially opposite the first direction and substantially parallel to the second axis. An elbow characterized in that it is configured. The elbow of claim 1,
The elbow characterized in that the at least one baffle includes a first baffle and a second baffle arranged so as to cross each other. The elbow of claim 1,
The baffle is disposed within the elbow around a centerline extending from the top of the elbow to the bottom of the elbow;
An elbow characterized in that the bottom of the baffle is aligned with the bottom of the elbow. The elbow of claim 1,
An elbow characterized in that the outlet port is completely surrounded by the inlet port. The elbow of claim 1,
An elbow characterized in that the baffle is substantially circular. The elbow of claim 1,
An elbow characterized in that the baffle is arranged around a center line extending from the right side of the elbow to the left side of the elbow in the elbow. The elbow of claim 1,
An elbow characterized in that the baffle further comprises a protrusion configured to protrude into the breathing cavity of the mask. The elbow of claim 1,
The second end of the elbow further comprises:
iii) comprises an elastic collar;
The elastic collar substantially surrounds the engaging portion and forms a receiving space between the collar and the engaging portion;
The collar can be deflected outward when a flange formed on the mask is inserted into the receiving space;
Thereby, the second end portion is set to the operating position, and at this time, the collar returns inward due to the elasticity of the collar itself,
This locks the flange against the collar,
Thus, the elbow can be detachably connected to the mask. The elbow according to claim 8,
The elbow characterized in that the engaging portion extends beyond the collar, thereby facilitating alignment of the second end of the elbow with respect to the mask. The elbow according to claim 8,
The elbow further comprises release portions on both sides of the collar,
The release portions bend toward each other to allow the collar to move outward, thereby allowing the flange to be withdrawn from the receiving space and detaching the elbow from the mask. An elbow characterized in that it can be connected as possible. The elbow of claim 1,
The elbow is further
c) Removable vent hole cover,
Comprising
This vent hole cover is detachably connected to the elbow,
The elbow characterized in that the vent hole cover is composed of a main body and at least one vent hole for gas discharge. The elbow of claim 11,
An elbow characterized in that the vent hole cover is made of an elastic material. The elbow of claim 1,
The elbow characterized in that the at least one baffle is M-shaped, V-shaped, or C-shaped. The elbow of claim 1,
An elbow characterized in that the outlet port has a cross-sectional area that increases along the second direction. A respiratory mask assembly,
a) a mask frame having at least one opening;
b) with a cushion;
c) an elbow according to claim 1;
A mask assembly comprising: The mask assembly of claim 15, wherein
A mask assembly characterized in that the diameter of the opening is between 20 mm and 40 mm. The mask assembly of claim 15, wherein
A mask assembly characterized in that the opening has a generally circular shape. The mask assembly of claim 16, wherein
The mask assembly, wherein the opening further comprises a ring. The mask assembly of claim 18, wherein
The mask assembly further comprising an inner ring. The mask assembly of claim 19, wherein
The mask assembly wherein the inner ring is connected to the inner diameter of the opening by at least one connector. The mask assembly of claim 20, wherein
The mask assembly, wherein the at least one connector has at least one notch configured to engage the elbow. The mask assembly of claim 19, wherein
The mask assembly further comprising an outer ring surrounding the inner ring. The mask assembly of claim 22, wherein
A mask assembly, wherein the outer ring has a diameter of 20 mm to 40 mm. The mask assembly of claim 19, wherein
A mask assembly wherein the inner ring forms a cavity. The mask assembly of claim 24.
A mask assembly, wherein the cavity has a diameter of 4 mm to 12 mm. The mask assembly of claim 25.
A mask assembly characterized in that a diameter of the cavity is between 6 mm and 10 mm. The mask assembly of claim 15, wherein
A mask assembly, wherein the cushion is configured to be inserted into the mask frame to form a cavity surrounding a user's nose. The mask assembly of claim 15, wherein
And a ring disposed adjacent to the opening,
The ring defines a passage communicating between the interior of the frame and a second passage formed at least in part by the baffle of the elbow;
As a result, a composite passage that connects the interior of the frame to the outlet port is formed. An elbow for interconnecting the respiratory mask and the air supply conduit,
The elbow is configured and arranged to be able to supply air with positive pressure to the respiratory mask, and is capable of excluding CO ₂ from the respiratory mask;
The elbow
a) a cylindrical first portion having an axis aligned in a first direction and configured to be connectable to the air supply conduit;
b) a cylindrical second portion having an axis aligned in a second direction and configured to be coupled to a frame of the respiratory mask;
c) a vent orifice constructed and arranged to be capable of deriving air from the interior of the respiratory mask to the ambient atmosphere;
d) with baffles;
Comprising
The baffle separates the inlet port and the outlet port;
The edge of the baffle guides air into the respiratory mask at a first angle and guides air from the interior of the respiratory mask through the vent orifice to the ambient atmosphere at a second angle. And
The first angle and the second angle are different from each other by about 180 degrees;
The elbow characterized in that the first angle and the second angle are substantially parallel to the second direction.

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