Nose pad and patient interface device

Abstract

The present application relates to a kind of nasal pad and patient interface device, it relates to the treatment of respiratory-related conditions, for improving patient interface device wearing comfort.The nasal pad of the present application, its nose opening is around the underside of the nostril of user, and is adapted to be sealed with the around of the nostril of user by nose sealing portion, so it only covers the nose of user, so it is more light and compact and not prominent as a whole, and is adapted to be sealed with the around of the nostril of user by nose sealing portion, so it does not press the force sensitive part of the nose of user, in addition, since there is no nasal pillow inserted into the nasal cavity of patient, can make wearing comfort further improve.

Description

TECHNICAL FIELD

[0001] The present invention relates to the technical field of treatment of respiratory related disorders, and in particular to a nasal cushion and patient interface device. BACKGROUND

[0002] Respiratory disorders are associated with a range of respiratory events, characterised by hypopnoea, apnoea and hyperpnoea. Examples of respiratory disorders include Obstructive Sleep Apnoea (OSA), respiratory insufficiency, obesity, Chronic Obstructive Pulmonary Disease (COPD) and others. Continuous Positive Airway Pressure (CPAP) therapy, Non-invasive ventilation (NIV) are commonly used treatments for the above respiratory disorders. In treatment, a tube is not inserted into the airways of the user via a surgical procedure, but rather a therapy device (e.g. a ventilator) delivers continuous or variable pressure air via a tube to the airways of the user through a patient interface device worn by the user to assist the user in performing some or all of the work of breathing to maintain adequate oxygen levels in the body.

[0003] Existing patient interface devices (or masks) are generally classified into three types according to the different cushions inside: one is a full-face mask that covers and seals the facial features of the user's mouth and nose, or a full-face mask; another is a nasal mask that covers only the facial features of the user's nose, seals around the user's nose and presses on the bridge of the user's nose, or a nasal mask; the third is a nasal cushion mask that covers the facial features of the user's nose and seals around the nostrils, and has a pair of protruding nasal pillows that intrude into the user's nostrils.

[0004] Ventilation therapy using such patient interface devices is usually long-term, and the user often has to wear the mask all night, so all conditions during treatment need to be paid attention to. Under this premise, the patient interface device should be as comfortable as possible, and the seal should be as stable as possible. If the user feels that the wearing comfort is not enough, he or she may refuse treatment, especially when the contact stress on the user's face exceeds the limit that the face can bear, which may cause marks, redness, and even ulcers. If the seal is not tight enough, it may cause gas leakage, which on the one hand leads to a pressure lower than the treatment value, making the treatment ineffective; on the other hand, the leaked airflow may impact the user's face, especially on the sensitive bridge of the nose or eyes, which may also cause discomfort and lead to user refusal of treatment. In addition, the comfort of the user wearing the mask is a major condition for the user's treatment compliance, which includes not only the feeling of the force on the face, but also the size, weight, prominence (i.e. the mask protruding from the user's face, which may cause the user to feel psychologically unhappy because he or she looks like a seriously ill user and affects the user's vision), and high price, etc. These factors may affect the user's refusal of treatment.

[0005] From the above perspective, the existing various types of masks all have some shortcomings, for example, the full-face mask is heavy and prominent as a whole. The nasal mask covers the user's nose relatively, but still presses the sensitive nasal bridge position of the user. The nasal pad mask usually has 2 nasal pillows inserted into the user's nasal cavity, and due to the "air jet" effect of the nasal pillow, the comfort is reduced. SUMMARY

[0006] The present application provides a nasal cushion and a patient interface device for improving the comfort of wearing the patient interface device.

[0007] According to a first aspect of the present application, the present application provides a nasal cushion, comprising an upper side, a lower side opposite to the upper side, and a circumferential side disposed between the upper side and the lower side, the circumferential side surrounding the upper side and the lower side to form a cavity; the upper side comprises a face contact portion for contacting the face of a user;

[0008] The face contact portion comprises a soft intermediate portion and first and second side portions located on both sides of the intermediate portion, and the first and second side portions are connected with the circumferential side; the intermediate portion receives the tip of the nose and the lower part of the nose of the wearer, and the intermediate portion does not immerse the tip of the nose when the wearer wears it.

[0009] In an embodiment, the intermediate portion comprises a nose opening communicating with the cavity and a nose sealing portion surrounding the nose opening, the nose opening is configured to surround the underside of the nostrils of the user in response to the nasal cushion being worn by the user, and is adaptively fitted to the surrounding of the nostrils of the user through the nose sealing portion to seal; wherein the nasal cushion is configured such that there is no clamping effect on the alae nasi of the wearer when the pressurized gas is sealed against the nasal bottom of the wearer.

[0010] In an embodiment, the nose sealing portion deforms in response to an increase in pressure in the cavity to fit the surrounding of the nostrils of the user.

[0011] In an embodiment, the thickness d1 of the first side portion is equal to the thickness d2 of the second side portion, and both are 0.6mm-1.5mm.

[0012] In an embodiment, the nose sealing portion is a film area, and the thickness d3 of the nose sealing portion is less than or equal to the thickness d1 of the first side portion.

[0013] In an embodiment, the thickness d3 of the nose sealing portion is 0.3mm-0.8mm.

[0014] In one embodiment, the circumferential side portion includes a rear side portion configured to be directed toward the user's lips in response to the nose pad being worn by the user, the rear side portion including a lip upper contact portion to contact the user's lips, the thickness d5 of the lip upper contact portion being equal to the thickness d3 of the nose seal portion.

[0015] In one embodiment, the rear side portion further includes a support portion connecting the lip upper contact portion and the lower side portion, the thickness d4 of the support portion being greater than the thickness d3 of the nose seal portion.

[0016] In one embodiment, the thickness d4 of the support portion is 0.9mm-2.0mm.

[0017] In one embodiment, the nose seal portion is recessed toward the lower side portion; or

[0018] the nose seal portion is in the same plane as the first side portion and the second side portion.

[0019] In one embodiment, the circumferential side portion further includes a front side portion disposed opposite the rear side portion;

[0020] the front side portion has a first groove mechanism recessed toward the rear side portion, and / or

[0021] the support portion has a second groove mechanism recessed toward the front side portion.

[0022] In one embodiment, the first groove mechanism is configured to extend in a direction from the first side portion to the second side portion, two opposite inner walls of the first groove mechanism having an acute included angle a1.

[0023] In one embodiment, the first groove mechanism is configured to change its acute included angle a1 in response to a pressure applied thereto, to adaptively adjust the wearing state.

[0024] In one embodiment, the thickness of the first groove mechanism is 0.5mm-1.4mm.

[0025] In one embodiment, the second groove mechanism is configured to extend in a direction from the first side portion to the second side portion, two opposite inner walls of the second groove mechanism having an acute included angle a2.

[0026] In one embodiment, the second groove mechanism is configured to change its acute included angle a2 in response to a pressure applied thereto, to adaptively adjust the wearing state.

[0027] In one embodiment, the thickness of the second groove mechanism is 0.5mm-1.4mm.

[0028] In one embodiment, the nasal seal portion is connected to the first side portion and the second side portion with a smooth transition, respectively.

[0029] In one embodiment, the nasal seal portion is connected to the front side portion and the rear side portion with a smooth transition, respectively.

[0030] In one embodiment, the first side portion is connected to the circumferential side portion with a smooth transition;

[0031] the second side portion is connected to the circumferential side portion with a smooth transition.

[0032] In one embodiment, the lower side portion comprises a base, the base is provided with a bottom opening in communication with the cavity, and the bottom opening is provided with a sealing structure for sealingly connecting the base to a frame of a patient interface device.

[0033] In one embodiment, the sealing structure comprises at least one protrusion provided on the inner wall of the bottom opening, and the protrusion realizes sealing by forming an interference fit with the frame.

[0034] In one embodiment, the thickness of the sealing structure is greater than the thickness d4 of the support portion.

[0035] In one embodiment, the sealing structure is a plastic part or is made of silicone rubber.

[0036] In one embodiment, the nasal cushion is made of silicone rubber, foam, thermoplastic elastomer, resin or textile material, etc.

[0037] In one embodiment, the base is provided with exhaust holes, and the inner hole diameter of the exhaust hole is less than or greater than the outer hole diameter of the exhaust hole.

[0038] In one embodiment, the exhaust hole is an oblong, circular, rectangular, or a structure composed of at least two straight lines that are relatively parallel and at least one arc connecting the two straight lines.

[0039] In one embodiment, the exhaust holes are arranged in a diverging manner, and each exhaust hole is adjacent to at most 6 exhaust holes.

[0040] In one embodiment, the exhaust holes are arranged on both sides of the bottom opening and away from the bottom opening.

[0041] In one embodiment, there are at most three rows of exhaust holes on each side of the bottom opening.

[0042] According to a second aspect of the present application, there is provided a nasal cushion comprising a middle portion, a first side portion and a second side portion respectively connected to the middle portion on the left and right sides, and a lower portion connected to the middle portion, the first side portion and the second side portion, the middle portion, the first side portion and the second side portion surrounding the lower portion to form a cavity; the middle portion, the first side portion and the second side portion comprising a face contact portion for contacting a user's face;

[0043] the face contact portion comprising a soft middle portion and a hard upper portion of the first side portion and the second side portion, the face contact portion receiving a user's tip of the nose and a lower part of the nose;

[0044] the middle portion comprising a nose opening communicating with the cavity, a nose seal portion for receiving a tip of the nose and a lower part of the nose and an upper lip area, the middle portion having a uniform film thickness, the nose opening being configured to surround a lower side of a user's nostril and to adaptably fit around the user's nostril for sealing by the nose seal portion in response to the nasal cushion being worn by the user.

[0045] In one embodiment, the nasal cushion is configured such that there is no pinching effect on the user's alae nasi when the nasal cushion is sealed against the user's nasal base by pressurized gas.

[0046] In one embodiment, the thickness d1 of the first side portion, the thickness d2 of the second side portion and the thickness d3 of the nose seal portion are equal.

[0047] In one embodiment, the thickness d1 of the first side portion, the thickness d2 of the second side portion and the thickness d3 of the nose seal portion are equal.

[0048] In one embodiment, the thickness d1 of the first side portion and the thickness d2 of the second side portion are greater than the thickness d3 of the nose seal portion, wherein the thickness d1 of the first side portion and the thickness d2 of the second side portion are equal.

[0049] In one embodiment, the thickness d1 of the first side portion and the thickness d2 of the second side portion are equal to 0.8mm-1.5mm.

[0050] In one embodiment, the thickness d3 of the nose seal portion is equal to 0.25mm-0.8mm.

[0051] In one embodiment, the middle portion extends rearwardly to the lower portion to form a rear portion, the rear portion being configured to face the user's lip in response to the nasal cushion being worn by the user, the rear portion comprising an upper lip contact portion for contacting the user's upper lip, the thickness d5 of the upper lip contact portion being equal to the thickness d3 of the nose seal portion.

[0052] In one embodiment, the rear side further comprises a support portion connecting the upper lip contact portion and the lower side portion, the thickness d4 of the support portion is greater than the thickness d3 of the nose seal portion.

[0053] In one embodiment, the thickness d4 of the support portion is 0.9mm-2.0mm.

[0054] In one embodiment, the intermediate portion extends forwardly to the lower side portion to form a front side portion oppositely arranged to the rear side portion, the front side portion has a smooth and groove-free surface.

[0055] In one embodiment, the thickness of the front side portion near the intermediate portion is less than the thickness of the front side portion near the lower side portion.

[0056] In one embodiment, the thickness of the front side portion near the intermediate portion is 0.3mm-0.8mm, and the thickness of the front side portion near the lower side portion is 0.9mm-2.0mm.

[0057] According to a third aspect of the present application, the present application provides a patient interface device comprising the nasal cushion as described above, further comprising a frame, the nasal cushion is sealingly connected with the frame.

[0058] Compared with the prior art, the present application has the advantages that the nasal opening hole surrounds the lower side of the nostrils of the user, and is adaptively fitted to the surrounding of the nostrils of the user to seal, so that it only covers the nose of the user, so that the whole is more light and compact and not prominent, and is adaptively fitted to the surrounding of the nostrils of the user to seal, so that it does not press the sensitive parts of the nose of the user, and in addition, since the nasal pillow is not inserted into the nasal cavity of the patient, the wearing comfort is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0059] The present application will be described in more detail below based on embodiments and with reference to the drawings.

[0060] Figure 1 is a schematic view of the three-dimensional structure of the nasal cushion in Example 1 of the present application (viewed from the front side);

[0061] Figure 2 is a front view of the nasal cushion in Example 1 of the present application (viewed from the front side);

[0062] Figure 3 is a top view of the nasal cushion in Example 1 of the present application (viewed from the upper side);

[0063] Figure 4 is a bottom view of the nasal cushion in Example 1 of the present application (viewed from the lower side);

[0064] Figure 5 is a rear view (viewed from the rear) of the nasal cushion in Example 1 of the present application;

[0065] Figure 6 is a perspective structural schematic view (viewed from the left side) of the nasal cushion in Example 1 of the present application;

[0066] Figure 7 is a Figure 3 sectional view at A-A;

[0067] Figure 8 is a Figure 3 sectional view at B-B;

[0068] Figure 9 is a sectional view of the nasal cushion in Example 2 of the present application;

[0069] Figure 10 is a front view (viewed from the front) of the nasal cushion in Examples 3 and 4 of the present application;

[0070] Figure 11 is a perspective structural schematic view (viewed from the left side) of the nasal cushion in Examples 3 and 4 of the present application;

[0071] Figure 12 is a perspective structural schematic view (viewed from the front) of the nasal cushion in Example 5 of the present application;

[0072] Figure 13 is a perspective structural schematic view (viewed from the left side) of the nasal cushion in Example 5 of the present application;

[0073] Figure 14 is a top view (viewed from the top) of the nasal cushion in Example 6 of the present application;

[0074] Figure 15 is a front view (viewed from the front) of the nasal cushion in Example 6 of the present application;

[0075] Figure 16 is a perspective structural schematic view (viewed from the front) of the nasal cushion in Example 6 of the present application;

[0076] Figure 17 is a bottom view (viewed from the bottom) of the nasal cushion in Example 6 of the present application;

[0077] Figure 18 is a perspective structural schematic view (viewed from the bottom) of the nasal cushion in Example 7 of the present application;

[0078] Figure 19 and Figure 20 is a structural schematic view of a patient interface device in an embodiment of the present application.

[0079] Figure 21 is a schematic view of a basic structure of a human nose;

[0080] Reference signs:

[0081] 100, 200 - nasal cushion;

[0082] 110, 210 - upper side; 111a, 211a - face contact portion;

[0083] 120, 220 - lower side; 130, 230 - front side; 140, 240 - rear side; 150, 250 - cavity; 260 - left side; 270 - right side;

[0084] 111, 211 - intermediate portion; 112, 212 - first side portion; 113, 213 - second side portion;

[0085] 1111, 2111 - nose opening; 1112, 2112 - nose seal portion;

[0086] 121, 221 - base; 122, 222 - bottom opening; 123, 223 - sealing structure; 124 - exhaust hole;

[0087] 131 - first groove mechanism;

[0088] 141 - lip upper contact portion; 142 - support portion; 143 - second groove mechanism;

[0089] 300 - patient interface device; 310 - frame; 320 - flexible hose; 330 - headgear;

[0090] N1 - nostril; N2 - ala nasi; F - cheek. DETAILED DESCRIPTION

[0091] The present application will be further described below with reference to the drawings.

[0092] Among the existing full-face masks, nasal masks and nasal cushion masks, for the full-face mask, the cushion therein covers the mouth and nose of the user, thus pressing the nose bridge of the user, causing discomfort in wearing; the cushion of the nasal mask also presses the sensitive position of the face of the user, i.e. the "nose bridge area"; and the cushion of the nasal cushion mask has a nose pillow intruding into the nostril, also causing discomfort.

[0093] Based on the above problems existing in the cushion of the existing masks, the present application provides a nasal cushion and a patient interface device having the same, to solve the technical problem that the existing cushion presses the nose bridge area of the user, causing discomfort.

[0094] Specifically, according to a first aspect of the present application, there is provided a nasal cushion, comprising: Figures 1-8As shown, the present application provides a nasal cushion for adapting with a patient interface device and being placed on a user's face to provide pressurized gas to the user for ventilation treatment. The nasal cushion of the present application is described below in various embodiments.

[0095] Embodiment 1

[0096] As shown, the nasal cushion 100 of the present embodiment includes an upper side 110, a lower side 120 opposite to the upper side 110, and a circumferential side disposed between the upper side 110 and the lower side 120, which surrounds the upper side 110 and the lower side 120 to form a cavity 150, which can form a gas pocket chamber when pressurized gas is provided to the user. Figures 4-11 The upper side 110 includes a face contact portion 111a for contacting the user's face. Specifically, the face contact portion 111a includes a middle portion 111 and first and second side portions 112 and 113 located on both sides of the middle portion 111, which are connected to the circumferential side. It can be understood that, for the convenience of manufacturing, the first and second side portions 112 and 113 can have the same or similar configuration, or the first and second side portions 112 and 113 can be symmetrically disposed about the middle portion 111.

[0097] The middle portion 111 includes a nose opening 1111 connected to the cavity 150 and a nose sealing portion 1112 surrounding the nose opening 1111. The nose opening 1111 is configured to surround the underside of the user's nostrils when the nasal cushion 100 is worn by the user, and to adaptably fit around the user's nostrils for sealing through the nose sealing portion 1112.

[0098] Therefore, by surrounding and sealing the user's nostrils through the nasal cushion 100 of the present application, the overall volume of the patient interface device can be reduced, making it small, light and unobtrusive, and also without inserting the user's nose pillow, further improving the comfort of the user.

[0099] Further, when pressurized gas is provided to the user, the cavity 150 has a certain pressure (for example, the pressure is 4-25 hpa) inside, so that the nose sealing portion 1112 can be deformed and expanded in response to the increase in pressure inside the cavity 150, so as to closely fit around the user's nostrils. Therefore, the nasal cushion 100 of the present application is fitted around the user's nostrils through the deformation and expansion of the nose sealing portion 1112, so that the design and manufacture do not need to consider the individual differences of the user's nose. Therefore, even if there are differences in the user's nose, the nose sealing portion 1112 can be adaptively fitted around the user's nostrils due to the easy deformability of the film, thereby improving the sealing and connection stability of the nasal cushion 100 in contact with the user's face.

[0100] ​

[0101] Optionally, the nasal seal 1112 is recessed towards the lower side 120, so that when the nasal seal 1112 expands under the pressure within the cavity 150, the nasal seal 1112 will be almost in the same plane as the first side 112 and the second side 113 (e.g., Figure 7 As shown by the dashed line, this indicates the position of the nasal sealing portion 1112 after expansion. This ensures that the facial contact portion 111a (middle portion 111) rests flat on the bottom of the user's nose without covering the user's nostrils N2. Therefore, the nasal pad 100 of the present invention does not achieve a stable sealing connection by clamping the sides of the user's nostrils, but rather by expanding and deforming the nasal sealing portion 1112 to make it fit tightly against the area around the user's nostrils N1. Therefore, the nasal pad 100 of the present invention is close to the width of the user's nose (the distance between the two nostrils, such as...). Figure 21 The nose pad 100 does not require a strict fit between the two (as shown), thus increasing the number of people it can be used to and improving its adaptability. Furthermore, the fact that the nose pad 100 does not clamp the user's nose reduces the contact area between it and the user's nose, further increasing wearing comfort.

[0102] Preferably, when the user wears the nasal pad 100, the outermost edge of the nasal seal 1112 will not exceed the tip of the user's nose, so it will not compress the tip of the user's nose and cause discomfort, and it can also reduce its volume.

[0103] Alternatively, the nasal seal 1112 may not be recessed, but may be located directly on the same plane as the first side 112 and the second side 113, that is, the facial contact portion 111a may be constructed as a planar structure. This design can make the expansion sealing effect of the nasal seal 1112 more obvious.

[0104] In addition, the nasal opening 1111 can be at least one hole, such as one hole, two holes or more holes, which can be selected and set as needed.

[0105] See Figure 5 The circumferential lateral portion includes a posterior portion 140 located on the patient side, an anterior portion 130 (located on the opposite side of the patient) disposed opposite to the posterior portion 140, and a left and right portion between the posterior portion 140 and the anterior portion 130. The posterior portion 140, the anterior portion 130, the left portion, and the right portion may be integrally constructed.

[0106] The rear side 140 is configured to face the user's lips in response to the nose pad 100 being worn by the user. The rear side 140 includes an upper lip contact portion 141 that contacts the user's upper lip and a support portion 142 that connects the upper lip contact portion 141 to the lower side 120.

[0107] The thickness d1 of the first side portion 112, the thickness d2 of the second side portion 113, the thickness d3 of the nose seal portion 1112, the thickness d4 of the support portion 142 and the thickness d5 of the lip contact portion 141 satisfy the following definitions:

[0108] d1 = d2, and d5 = d3 < d1 < d4.

[0109] That is, the thickness of the first side portion 112 is the same as the thickness of the second side portion 113, and both are greater than the thickness of the nose seal portion 1112. For example, the thickness d1 of the first side portion 112 and the thickness d2 of the second side portion 113 can both be 0.6mm-1.5mm, preferably 0.8mm-1.5mm, and more preferably 0.8mm-1.2mm. The thickness d3 of the nose seal portion 1112 can be 0.25mm-0.8mm, preferably 0.3mm-0.8mm, and more preferably 0.3mm-0.5mm, so in this embodiment, the thickness of the nose seal portion 1112 is the smallest, which is the film area.

[0110] Since the first side portion 112 and the second side portion 113 contact the user's face first when the nose pad 100 is worn, the first side portion 112 and the second side portion 113 are important support points of the face when worn, and the force they bear is greater than the force the nose seal portion 1112 bears; and the first side portion 112 and the second side portion 113 are located on both sides of the user's alae nasi, so they are closer to the user's cheek muscles than the nose seal portion 1112, and the user's sense of force at the positions corresponding to the first side portion 112 and the second side portion 113 is not obvious, so the thickness of the first side portion 112 and the second side portion 113 is set to be greater than that of the nose seal portion 1112, so that their rigidity is stronger than that of the nose seal portion 1112, thereby effectively distributing the pressure of the face wearing the nose pad 100 to increase the comfort of wearing.

[0111] The support portion 142 can extend circumferentially, for example, it can form part of the rear side portion 140, the left side portion and the right side portion. Therefore, the support portion 142 needs to maintain the overall shape of the cavity 150, so that it maintains its shape without collapsing when worn under low pressure and when the nose pad 100 is under pressure. Therefore, the thickness d4 of the support portion 142 is the thickest, for example, it can be 0.9mm-2.0mm, preferably 0.9mm-1.5mm, to ensure a certain rigidity.

[0112] The lip contact portion 141 corresponds to the area of the user's face that is sensitive to force, so its thickness d5 can be the same as the thickness d3 of the nose seal portion 1112, so in this embodiment, the lip contact portion 141 is also a film area. To ensure that the compression force of the user's upper lip when worn is small enough to increase the comfort of wearing.

[0113] The front side 130 and the rear side 140 can be provided with the groove mechanism, or can not be provided with the groove mechanism, or one of them can be provided with the groove mechanism.

[0114] For example, in the present embodiment, the front side 130 is provided with a first groove mechanism 131 recessed towards the rear side 140. The first groove mechanism 131 is configured as a groove, two opposite inner walls of the groove have an acute angle α1 (for example, it can be 20° to 70°), and the thickness of the first groove mechanism 131 can be 0.5mm-1.4mm. Therefore, under the action of low pressure, when the nose sealing part 1112 cannot be effectively attached to the nose of the user due to the fact that the pressure expansion effect is not obvious, the first groove mechanism 131 can provide a certain elastic support for the position near the nose of the user, thereby increasing the sealing force. At the same time, by compressing the first groove mechanism 131 (i.e. reducing the angle α1 thereof), the compressibility can be adapted to different people with different nasolabial angles, so that a more suitable wearing state can be self-adaptively adjusted.

[0115] The lower side 120 includes a base 121, and the base 121 is provided with a bottom opening 122 communicating with the cavity, and the bottom opening 122 is provided with a sealing structure 123 for sealingly connecting the base 121 to the frame of the patient interface device.

[0116] The bottom opening 122 can be triangular, circular, or elliptical in shape. The sealing structure 123 therein can enable the base 121 to be sealingly and non-rotatably connected to the frame of the patient interface device. The sealing structure 123 can be at least one protrusion on the inner wall of the bottom opening 122, which realizes sealing by forming an interference fit with the frame.

[0117] Alternatively, the sealing structure 123 can also be a plastic part or a higher-hardness silicone rubber, which realizes sealing connection with the frame by elastic deformation.

[0118] The nose pad 100 is preferably made of silicone rubber, and can also be made of foam, thermoplastic elastomer, resin, or textile material.

[0119] Embodiment 2

[0120] On the basis of the above-mentioned embodiment 1, the present application also provides a transformed embodiment, namely embodiment 2, as shown in Figure 9 The following will mainly explain the differences between the above-mentioned embodiment 1.

[0121] The difference between the present embodiment and the above-mentioned embodiment 1 is that the thickness d1 of the first side portion 112 is the same as the thickness d2 of the second side portion 113, and is equal to the thickness d3 of the nose sealing portion 1112, i.e. d1 = d2 = d3. The thickness of the three portions can be, for example, 0.3 mm to 0.8 mm, so that the entire face contacting portion 111a can be formed as an air bag, thereby reducing the stress on the entire face contacting portion 111a and enhancing the wearing comfort. Therefore, the nose pad 100 of the present embodiment can more effectively fit the facial features of some facial deformity groups.

[0122] In the present embodiment, similar to embodiment 1, the thickness d4 of the support portion 142 can also be selected to be relatively thick, for example, d4 ≥ d3. For example, d4 can be 0.9 mm to 2.0 mm, and preferably can be 0.9 mm to 1.5 mm, to ensure a certain rigidity.

[0123] The same features and configurations of the present embodiment as those of embodiment 1 will not be described again.

[0124] Embodiment 3

[0125] On the basis of the above-mentioned embodiment 1, the present application also provides a modified embodiment, i.e. embodiment 3, as shown in Figure 10 and 11 The difference between the present embodiment and the above-mentioned embodiment 1 will be mainly described below.

[0126] The difference between the present embodiment and the above-mentioned embodiment 1 is that, in addition to the first groove mechanism 131 recessed toward the rear side portion 140 on the front side portion 130, a second groove mechanism 143 recessed toward the front side portion 130 is also provided on the support portion 142. The second groove mechanism 143 can also be configured as a groove, the two opposite inner walls of the groove having an acute included angle a2 (for example, 20° to 70°), and the thickness of the second groove mechanism 143 can be 0.5 mm to 1.4 mm. When the nose sealing portion 1112 is not obviously expanded under pressure and cannot effectively fit the nose features of the user, the groove can provide a certain elastic support to the position near the upper lip of the user, thereby increasing the sealing force. At the same time, by compressing the first groove mechanism 131 (i.e. reducing the included angle a1) and the second groove mechanism 143 (i.e. reducing the included angle a2), the compressibility can be adapted to different nose-lip angles of different people, so that a more suitable wearing state can be self-adaptively adjusted.

[0127] Embodiment 4

[0128] On the basis of the above-mentioned embodiment 2, the present application also provides a modified embodiment, i.e. embodiment 4, as shown in Figure 10 and 11 The difference between the present embodiment and the above-mentioned embodiment 2 will be mainly described below.

[0129] The difference between this embodiment and the above-mentioned embodiment 2 is that, in addition to the first groove mechanism 131 recessed towards the rear side portion 140 on the front side portion 130, a second groove mechanism 143 recessed towards the front side portion 130 is arranged on the support portion 142. The second groove mechanism 143 can also be configured as a groove, two opposite inner walls of the groove having an acute included angle a2 (for example, it can be 20° to 70°), and the thickness of the second groove mechanism 143 can be 0.5mm-1.4mm. When the nasal seal portion 1112 is not obviously affected by the pressure expansion and cannot effectively fit the nose features of the user under low pressure, the groove can provide a certain elastic support for the position near the upper lip of the user, thereby increasing the sealing force; at the same time, the compressibility of the first groove mechanism 131 (even if its included angle a1 is reduced) and the second groove mechanism 143 (even if its included angle a2 is reduced) can be compressed to adapt to different people with different nasolabial angles, so that a more suitable wearing state can be self-adaptively adjusted.

[0130] Embodiment 5

[0131] On the basis of the above-mentioned embodiments 1 and 2, the present application also provides a modified embodiment, namely embodiment 5, as shown in Figure 12 and 13 The difference between this embodiment and the above-mentioned embodiments 1 and 2 will be mainly described below.

[0132] The difference between this embodiment and the above-mentioned embodiments 1 and 2 is that the first groove mechanism 131 on the front side portion 130 is cancelled. That is, in this embodiment, neither the front side portion 130 nor the rear side portion 140 is provided with a groove mechanism, and optionally, the thickness of the front side portion 130 can be 0.3mm-0.8mm, that is, the thickness of the front side portion 130 is the same as the thickness of the nasal seal portion 1112, and all are thin film regions.

[0133] Optionally, one part of the thickness of the front side portion 130 is the same as the thickness of the nasal seal portion 1112, for example, it can be 0.3mm-0.8mm. While the thickness of another part of the front side portion 130 is the same as the thickness of the support portion 142, for example, it can be 0.9mm-2.0mm, preferably 0.9mm-1.5mm, so as to ensure a certain rigidity.

[0134] Embodiment 6

[0135] As shown in Figures 14-17As shown, the nasal cushion 200 of the present embodiment includes an upper side 210, a lower side 220 opposite to the upper side 210, and a circumferential side disposed between the upper side 210 and the lower side 220, the circumferential side surrounding the upper side 210 and the lower side 220 to form a cavity 250, which can form a bladder chamber when providing pressurized gas to the user. In addition, the upper side 210 includes a face contacting portion for contacting the face of the user.

[0136] The face contacting portion includes a middle portion 211 and first and second side portions 212 and 213 located on both sides of the middle portion 211, the first and second side portions 212 and 213 being connected to the circumferential side. It can be appreciated that, for ease of manufacturing, the first and second side portions 212 and 213 can be of the same or similar configuration, or the first and second side portions 212 and 213 can be symmetrically disposed about the middle portion 211.

[0137] The middle portion 211 includes a nasal opening 2111 in communication with the cavity 250 and a nasal seal portion 2112 surrounding the nasal opening 2111, the nasal opening 2111 being configured to surround the underside of the user's nostrils when the nasal cushion 200 is donned by the user and to adaptably conform to the surrounding of the user's nostrils for sealing by the nasal seal portion 2112.

[0138] Therefore, the nasal cushion 200 of the present embodiment, by sealing against the underside of the user's nostrils and surrounding the nostrils, can reduce the bulk of the patient interface device as a whole, making it compact and unobtrusive, and also without inserting the user's nose, making it further comfortable.

[0139] Further, when providing pressurized gas to the user, the cavity 150 has a certain pressure (e.g. 4-25 hpa) inside, so the nasal seal portion 2112 can deform in response to the increase of the pressure inside the cavity 250 to conform to the surrounding of the user's nostrils. Therefore, the nasal cushion 200 of the present embodiment conforms to the surrounding of the user's nostrils by the swelling deformation of the nasal seal portion 2112, so that the nasal cushion 200 does not need to consider the individual differences of the user's nose in design and manufacturing. Therefore, even if there are individual differences in the user's nose, the nasal seal portion 2112 can adaptably conform to the surrounding of the user's nostrils due to the easy deformability of the membrane, so as to improve the sealing and connection stability of the nasal cushion 200 in contact with the user's face.

[0140] Optionally, the nose seal portion 2112 is concave towards the lower side 220, so that when the nose seal portion 2112 is inflated by the pressure in the cavity 250, the nose seal portion 2112 will be almost in the same plane as the first side portion 212 and the second side portion 213 (as shown by the dashed line, which represents the position of the nose seal portion 2112 after inflation), thereby ensuring that the face contact portion 211a (the middle portion 211) is flat on the bottom of the user's nose and does not wrap around the user's alar wings. Therefore, the nose pad 200 according to the present application does not achieve a stable seal by clamping the sides of the user's alar wings, but rather by the inflation deformation of the nose seal portion 2112 to tightly fit around the user's nostrils, so that the nose pad 200 according to the present application does not need to strictly match the width of the user's nose (the distance W between the alar wings), thereby increasing the population that the nose pad 200 can accommodate and improving its population adaptability. In addition, the fact that the nose pad 200 does not clamp the user's nose can also reduce the contact area with the user's nose, thereby further increasing the comfort of wearing.

[0141] Preferably, the distance L between the outer side of the nose seal portion 2112 and the center of the nose opening 2111 is not greater than the height of the user's nasal septum to the tip of the nose. That is, when the user wears the nose pad 200, the outermost edge of the nose seal portion 2112 will not exceed the tip of the user's nose, so as not to press the tip of the user's nose and cause discomfort, and also to reduce the volume.

[0142] Further optionally, the nose seal portion 2112 can not be concave, but can be directly in the same plane as the first side portion 212 and the second side portion 213, i.e. the face contact portion 211a can be configured as a flat structure, which can make the inflation sealing effect of the nose seal portion 2112 more obvious.

[0143] In addition, the nose opening 2111 can be at least one hole, for example, one hole, two holes or multiple holes can be provided, which can be selected as needed.

[0144] The circumferential side portion includes a rear side portion 240, a front side portion 230 opposite the rear side portion 240, and a left side portion 260 and a right side portion 270 between the rear side portion 240 and the front side portion 230. The important difference between the present embodiment and the above-mentioned embodiments 1-5 is that the nose seal portion 2112 in the present embodiment extends forward to the front side portion 230 and extends backward to the rear side portion 240, and the connection between the nose seal portion 2112 and the front side portion 230 and the rear side portion 240 is a continuous curved surface, or the connection therebetween can be staggered.

[0145] Preferably, the nasal seal portion 2112 extends forwardly to the front side portion 230, rearwardly to the rear side portion 240, and forms an integral part with the front side portion 230 and the rear side portion 240, i.e. a middle portion, such that the middle portion has a uniform thickness. That is, the thickness d3 of the nasal seal portion 2112 is the same as the thickness of the front side portion 230 and the rear side portion 240. For example, d3 can be 0.3mm-0.9mm, preferably 0.3mm-0.5mm, i.e. the middle portion is a thin film region (the region shown by the dashed line in the figure).

[0146] It can be understood that the thickness d5 of the corresponding lip superior contact portion on the rear side portion 240 and the thickness d4 of the support portion are the same, and are also the same as the thickness d3 of the nasal seal portion 2112, i.e. d3=d4=d5.

[0147] Further, the first side portion 212 extends to the left side portion 260, and the second side portion 213 extends to the right side portion 270, and the connection between the first side portion 212 and the left side portion 260 and the connection between the second side portion 213 and the right side portion 270 are continuous curved surfaces, or the connections can be staggered with each other.

[0148] Preferably, the first side portion 212 extends to form an integral part with the left side portion 260, and the second side portion 213 extends to form an integral part with the right side portion 270, i.e. a peripheral portion, and the peripheral portion has a uniform thickness. Therefore, the thickness d1 of the first side portion 212 and the thickness of the left side portion 260 and the thickness d2 of the second side portion 213 and the thickness of the right side portion 270 are the same, and therefore the integral part formed thereby also has a uniform thickness, and the thickness is greater than the thickness d3 of the nasal seal portion 2112 described above, i.e. d1≥d3. For example, d1 and d2 can be 0.6mm-1.5mm, preferably 0.8mm-1.2mm.

[0149] That is, in the present embodiment, the rigidity of the peripheral portion (the left side portion 260, the right side portion 270, the first side portion 212 and the second side portion 213) is greater than the rigidity of the middle portion (the nasal seal portion 2112, the front side portion 230 and the rear side portion 240). This is because the peripheral portion is an important support point on the user's face when the nasal cushion 200 is worn, and the force acting thereon is greater than the middle portion corresponding to the user's nose, and the peripheral portion is closer to the user's cheek muscles, and therefore the user's feeling of force is not obvious, and therefore the rigidity thereof is set to be greater than the rigidity of the middle portion, which can effectively distribute the pressure of the facially worn cushion and increase the wearing comfort.

[0150] The lower side portion 220 comprises a base 221, and the base 221 is provided with a bottom opening 222 in communication with the cavity, and the bottom opening 222 is provided with a sealing structure 223, and the sealing structure 223 is used for sealingly connecting the nasal cushion 200 to the frame of the patient interface device.

[0151] The bottom opening 222 can be triangular, circular, or elliptical in shape. The sealing structure 223 therein can enable the base 221 to be sealingly and non-rotatably connected to the frame of the patient interface device. The sealing structure 223 can be a protrusion on the inner wall of the bottom opening 222, which achieves sealing by forming an interference fit with the frame.

[0152] Alternatively, the sealing structure 223 can also be a plastic part or a higher-hardness silicone rubber, which achieves sealing connection by elastic deformation with the frame.

[0153] The nasal cushion 200 is preferably made of silicone rubber, and can also be made of foam, thermoplastic elastomer, resin, or textile fabric.

[0154] Embodiment 7

[0155] Based on the above embodiments, the present application further provides a modified embodiment, i.e. Embodiment 7, as shown in Figure 21 The difference between this embodiment and the above embodiments is that the base 121, 221 is provided with an exhaust portion in this embodiment.

[0156] The exhaust portion can be exhaust holes 124 arranged on both sides of the bottom opening 122. The arrangement and size of the exhaust holes 124 can be set as needed.

[0157] For example, the inner hole diameter of the exhaust hole 124 is smaller or larger than the outer hole diameter of the exhaust hole 124. Since the exhaust hole with the same inner and outer diameters will cause greater noise, the inner hole diameter of the exhaust hole 124 is set to be different from the outer hole diameter of the exhaust hole 124, which can greatly reduce the exhaust noise.

[0158] Further, the exhaust hole 124 can be long-elliptical, circular, rectangular, or a structure composed of at least two straight lines that are relatively parallel and at least one arc line connecting the two straight lines. As shown in Figure 21 the exhaust hole 123 is circular in the embodiment shown.

[0159] In addition, the exhaust holes 124 are arranged in a diverging manner, and the exhaust holes 123 are arranged as much as possible to be diffused, and the number of adjacent exhaust holes 124 of each exhaust hole 124 is at most 6.

[0160] As shown in Figure 21 the exhaust holes 124 are arranged on both sides of the bottom opening 122, 222 and away from the bottom opening 122, 222. There are at most three rows of exhaust holes 124 on each side of the bottom opening 122, 222. As shown in Figure 21 the number of exhaust holes 124 in each row of exhaust holes 124 is different, for example, the number of exhaust holes 124 in the row of exhaust holes 124 closest to the bottom opening 122, 222 is the least.

[0161] As Figure 19 and Figure 20 shown, according to the second aspect of the present application, the present application further provides a patient interface device 300, comprising a nasal mask, the above-mentioned nasal cushion 100, 200 arranged in the nasal mask, and a frame 310 connected with the above-mentioned nasal cushion 100, 200. The frame 310 is provided with a headgear 330 for fixing with the head of the user.

[0162] The frame 310 is connected with the pressure device through a flexible conduit 320, through which the pressurized gas is delivered into the chamber of the nasal mask, and then enters the airway of the user through the nasal opening 1111, 2111, thus the sealing structure 123 in the above-mentioned bottom opening 122, 222 can ensure the sealing connection of the nasal cushion 100, 200 and the frame.

[0163] Although the present application has been described with reference to the preferred embodiments, various modifications can be made to it without departing from the scope of the present application and equivalent components can be substituted therefor. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A nasal cushion, characterized in that, The nasal pad comprises an upper side, a lower side opposite to the upper side, and a circumferential side disposed between the upper side and the lower side, the circumferential side surrounding the upper side and the lower side to form a cavity; the upper side comprises a face contact portion for contacting a user's face; The face contact portion comprises a soft middle portion and first and second side portions located on both sides of the middle portion, the first and second side portions are both connected with the circumferential side; the middle portion receives a user's nose tip and sub-nasal portion, and the middle portion does not immerse the nose tip when the user wears the nasal pad; The middle portion comprises a nose opening communicating with the cavity and a nose sealing portion surrounding the nose opening, the nose opening is configured to surround the lower side of the user's nostrils when the nasal pad is worn by the user and to adaptively fit and seal with the surrounding of the user's nostrils through the nose sealing portion; wherein the nasal pad is configured such that there is no pinching effect on the user's alae nasi when the nasal pad is sealed against the user's nasal bottom by the pressurized gas; The nose sealing portion is recessed towards the lower side, and when the nose sealing portion is inflated by pressure, the nose sealing portion will be in the same plane as the first and second side portions.

2. The nasal cushion of claim 1, wherein The nose sealing portion deforms in response to an increase in pressure in the cavity to fit around the user's nostrils.

3. The nasal cushion of claim 1, wherein, The thickness d1 of the first side portion is equal to the thickness d2 of the second side portion, and both are 0.6 mm - 1.5 mm.

4. The nasal cushion of either of claims 1 or 2, wherein, The nose sealing portion is a thin film area, and the thickness d3 of the nose sealing portion is less than or equal to the thickness d1 of the first side portion.

5. The nasal cushion of claim 4, wherein, The thickness d3 of the nose sealing portion is 0.3 mm - 0.8 mm.

6. The nasal cushion of claim 4, wherein, The circumferential side comprises a rear side portion configured to face the user's lips when the nasal pad is worn by the user, the rear side portion comprises a lip superior contact portion for contacting the user's lip superior, and the thickness d5 of the lip superior contact portion is equal to the thickness d3 of the nose sealing portion.

7. The nasal cushion of claim 6, wherein, The rear side portion further comprises a support portion connecting the lip superior contact portion and the lower side, and the thickness d4 of the support portion is greater than the thickness d3 of the nose sealing portion.

8. The nasal cushion of claim 7, wherein, The thickness d4 of the support portion is 0.9 mm - 2.0 mm.

9. The nasal cushion of claim 8, wherein, The circumferential side further comprises a front side portion disposed opposite to the rear side portion; The front side portion is provided with a first groove mechanism recessed towards the rear side portion, and / or The support portion is provided with a second groove mechanism recessed towards the front side portion.

10. The nasal cushion of claim 9, wherein, The first groove mechanism is configured to extend in the direction from the first side portion to the second side portion, and two opposite inner walls of the first groove mechanism have an acute included angle α1.

11. The nasal cushion of claim 10, wherein, The first groove mechanism is configured to change its acute included angle α1 in response to the pressure received, to adaptively adjust the wearing state.

12. The nasal cushion of claim 9, wherein, The thickness of the first groove mechanism is 0.5 mm - 1.4 mm.

13. The nasal cushion of claim 9, wherein, The second groove mechanism is configured to extend in the direction from the first side portion to the second side portion, and two opposite inner walls of the second groove mechanism have an acute included angle α2.

14. The nasal cushion of claim 13, wherein, The second groove mechanism is configured to change its acute angle α2 in response to the pressure received to adaptively adjust the wearing state.

15. The nasal cushion of claim 9, wherein, The thickness of the second groove mechanism is 0.5 mm - 1.4 mm.

16. The nasal cushion of either claim 1 or 2, wherein, The nasal seal portion is smoothly connected with the first side portion and the second side portion, respectively.

17. The nasal cushion of claim 9, wherein, The nasal seal portion is smoothly connected with the front side portion and the rear side portion, respectively.

18. The nasal cushion of claim 1, wherein, The first side portion is smoothly connected with the circumferential side portion; The second side portion is smoothly connected with the circumferential side portion.

19. The nasal cushion of claim 7, wherein, The lower side portion comprises a base, wherein a bottom opening is arranged on the base and is in communication with the cavity, and a sealing structure is arranged in the bottom opening and is used for sealingly connecting the base to a frame of a patient interface device.

20. The nasal cushion of claim 19, wherein, The sealing structure comprises at least one protrusion arranged on the inner wall of the bottom opening, and the protrusion realizes sealing by forming an interference fit with the frame.

21. The nasal cushion of claim 20, wherein, The thickness of the sealing structure is greater than the thickness d4 of the support portion.

22. The nasal cushion of claim 19, wherein, The sealing structure is a plastic part or is made of silicone rubber.

23. The nasal cushion of claim 1, wherein, The nasal cushion is made of silicone rubber, foam, thermoplastic elastomer, resin or textile material.

24. The nasal cushion of claim 19, wherein, The base is provided with an exhaust hole, and the inner hole diameter of the exhaust hole is less than or greater than the outer hole diameter of the exhaust hole.

25. The nasal cushion of claim 24, wherein, The exhaust hole is in the shape of an oblong, a circle, a rectangle, or a structure composed of at least two straight lines that are relatively parallel and at least one arc that connects the two straight lines.

26. The nasal cushion of claim 24, wherein, The exhaust holes are arranged in a diverging manner, and each exhaust hole is adjacent to at most six exhaust holes.

27. The nasal cushion of claim 24, wherein, The exhaust holes are arranged on both sides of the bottom opening and away from the bottom opening.

28. The nasal cushion of claim 27, wherein, There are at most three rows of exhaust holes on each side of the bottom opening.

29. A nasal cushion, comprising: The intermediate portion, the first side portion and the second side portion are arranged around the lower side portion to form a cavity; the intermediate portion, the first side portion and the second side portion comprise a face contact portion that contacts the face of the user; The face contact portion comprises a soft intermediate portion and a rigid upper portion that is stiffer than the first side portion and the second side portion of the intermediate portion, and the face contact portion receives the tip of the nose and the sub-nasal portion of the user; The intermediate portion comprises a nasal opening that is in communication with the cavity, a nasal seal portion that accommodates the tip of the nose and the sub-nasal portion, and an upper lip area, the intermediate portion has a uniform film thickness, the nasal opening is configured to surround the lower side of the nostrils of the user in response to the nasal cushion being worn by the user, and to adaptively fit around the user's nostrils for sealing through the nasal seal portion, and the nasal cushion is configured such that there is no pinching effect on the alae nasi of the user when the pressurized gas is sealed against the user's nasal bottom; The nasal seal portion is recessed towards the lower side portion, and when the nasal seal portion is inflated under pressure, the nasal seal portion will be in the same plane as the first side portion and the second side portion; or The nasal seal portion is in the same plane as the first side portion and the second side portion.

30. The nasal cushion of claim 29, wherein, The thickness d1 of the first side portion and the thickness d2 of the second side portion are each greater than the thickness d3 of the nose seal portion, wherein the thickness d1 of the first side portion and the thickness d2 of the second side portion are equal.

31. The nasal cushion of claim 30, wherein, The thickness d1 of the first side portion and the thickness d2 of the second side portion are each 0.8 mm - 1.5 mm.

32. The nasal cushion of claim 30, wherein, The thickness d3 of the nose seal portion is 0.25 mm - 0.8 mm.

33. The nasal cushion of claim 29, wherein, The thickness d1 of the first side portion, the thickness d2 of the second side portion, and the thickness d3 of the nose seal portion are each equal.

34. The nasal cushion of claim 33, wherein, The thickness d1 of the first side portion, the thickness d2 of the second side portion, and the thickness d3 of the nose seal portion are each 0.3 mm - 0.8 mm.

35. The nasal cushion of claim 34, wherein, The intermediate portion extends rearwardly to the lower side portion to form a rear side portion configured to face the user's lips in response to the nose pad being worn by the user, the rear side portion including a lip superior contact portion to contact the user's lips superiorly, the thickness d5 of the lip superior contact portion being equal to the thickness d3 of the nose seal portion.

36. The nasal cushion of claim 35, wherein, The rear side portion further includes a support portion connecting the lip superior contact portion and the lower side portion, the thickness d4 of the support portion being greater than the thickness d3 of the nose seal portion.

37. The nasal cushion of claim 36, wherein, The thickness d4 of the support portion is 0.9 mm - 2.0 mm.

38. The nasal cushion of claim 36, wherein, The intermediate portion extends forwardly to the lower side portion to form a front side portion disposed opposite the rear side portion, the front side portion having a smooth and grooveless surface.

39. The nasal cushion of Claim 38, wherein, The thickness of the front side portion proximate the intermediate portion is less than the thickness of the front side portion proximate the lower side portion.

40. The nasal cushion of Claim 39, wherein, The thickness of the front side portion proximate the intermediate portion is 0.3 mm - 0.8 mm, and the thickness of the front side portion proximate the lower side portion is 0.9 mm - 2.0 mm.

41. A patient interface device comprising a nasal cushion as claimed in any one of claims 1-28 or as claimed in any one of claims 29-40, characterised in that, A frame is further included, the nose pad being sealingly connected with the frame.

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