Nasal mask for nasal high flow humidified oxygen therapy and nasal high flow humidified oxygen therapy system

Abstract

The utility model relates to ventilation treatment field discloses a nasal mask and nasal high flow humidification oxygen therapy system for nasal high flow humidification oxygen therapy, the nasal mask includes main part and sets up in the air inlet and nose seal portion of main part, the nose seal portion is arranged to be able to be sealedly connected with the nasal cavity inner wall, the air inlet is at least partially located in the nose seal portion to provide the inhaled gas to the nose seal portion, the part of air inlet is located in the nose seal portion with the clearance channel between the inner wall of nose seal portion to guide the exhaled gas of entering the nose seal portion to the main part is discharged by the main part. The utility model discloses the technical scheme, can solve the problem that the pressure change of breathing circuit in the exhalation and inspiration stage of traditional nasal oxygen tube is little different, is difficult to judge which stage the patient is in breathing, leads to the problem that cannot provide gas according to the demand state accurately.

Description

Technical Field

[0001] This utility model relates to the field of ventilation therapy, specifically to a nasal mask for high-flow humidified oxygen therapy via the nose and a high-flow humidified oxygen therapy system via the nose including the nasal mask. Background Technology

[0002] High-flow humidified nasal cannula oxygen therapy (HFNC) is a method of oxygen therapy that continuously delivers a high flow rate of gas with adjustable and relatively constant oxygen concentration, temperature, and humidity to patients via a nasal cannula. HFNC combines the ease of use and comfort of traditional oxygen therapy with the non-invasive benefits of airway humidification, accurate oxygen concentration, and positive end-expiratory pressure. HFNC achieves precise oxygen delivery by flushing residual gas from the patient's physiological dead space with high-flow gas, reducing the repeated inhalation of high-CO2 and low-O2 gases, and improving the patient's hypoxic state while reducing the work of breathing. As a novel respiratory support technology, HFNC has been widely used clinically in recent years, showing positive therapeutic effects for mild to moderate respiratory failure (especially hypoxic respiratory failure). In addition, indications for HFNC include post-extubation after mechanical ventilation, post-surgery, pre-oxygenation after endotracheal intubation, and bronchoscopy.

[0003] Similar to traditional ventilation therapy equipment such as ventilators, HFNC devices typically offer multiple ventilation modes, providing patients with a variety of ventilation options. Among them, some HFNC devices from the Remytec brand feature a unique Smartflow mode that switches the output gas flow rate between inhalation and exhalation based on the patient's respiratory stage. In this mode, doctors or other patients pre-set the inspiratory and expiratory flow rates. When the patient inhales, the HFNC device delivers a higher flow rate of gas, and when the patient exhales, it delivers a lower flow rate, providing a more comfortable treatment experience while conserving oxygen and other gas resources.

[0004] Existing HFNC devices primarily use sensors to detect data such as gas flow and pressure within the breathing circuit. During ventilation therapy, the HFNC device can determine the patient's respiratory stage based on the pressure values ​​collected by the sensors within the breathing circuit, and then adjust the output of the HFNC device accordingly, resulting in more precise gas supply control.

[0005] However, in traditional nasal oxygen cannulas, a certain gap needs to be maintained between the nasal plug and the nostril to allow exhaled air to escape. This results in little difference in pressure changes in the breathing circuit during the exhalation and inhalation phases, making it difficult to determine which stage of breathing the patient is in through pressure monitoring. Therefore, it is impossible to deliver gas accurately according to the patient's needs. Utility Model Content

[0006] The purpose of this invention is to overcome the problem that the pressure changes in the breathing circuit during the exhalation and inhalation phases of traditional nasal oxygen tubes are not significantly different, making it difficult to determine which stage of breathing the patient is in, thus resulting in the inability to accurately deliver gas according to the patient's needs.

[0007] To achieve the above objectives, this utility model provides a nasal mask for high-flow humidified oxygen therapy via the nose. The nasal mask includes a main body, an air inlet, and a nasal sealing portion disposed in the main body. The nasal sealing portion is configured to seal against the inner wall of the nasal cavity. The air inlet is at least partially located within the nasal sealing portion to provide inhaled gas to the nasal sealing portion. A gap channel is formed between the portion of the air inlet located within the nasal sealing portion and the inner wall of the nasal sealing portion to guide exhaled gas entering the nasal sealing portion to the main body and then discharged from the main body.

[0008] In some embodiments, the main body includes a gas chamber and an air outlet communicating with the gas chamber, the nasal seal is connected to and communicates with the air outlet, and the gap channel communicates with the gas chamber.

[0009] In some embodiments, the hardness of the air intake is greater than the hardness of the nasal seal. Preferably, the nasal seal is made of silicone and the air intake is made of plastic.

[0010] In some embodiments, the main body further includes an air inlet communicating with the gas chamber, the air inlet being disposed within the gas chamber and extending from the air inlet into the nose seal.

[0011] In some embodiments, the main body has at least one air outlet, the nasal seal includes at least one nasal plug connected to the air outlet, and the air inlet includes at least one air inlet pipe extending from the air inlet into the nasal plug, with the air inlet pipe and the nasal plug forming the gap channel.

[0012] In some embodiments, the main body has two air outlets, the nasal seal includes two nasal plugs, and the air inlet includes two air inlet pipes.

[0013] In some embodiments, the air intake pipe is configured to extend in an arc from the air inlet toward the nose plug, and the two ends of the two air intake pipes near the nose plug are close to each other.

[0014] In some embodiments, the inner diameter of the end of the air intake pipe near the air inlet is larger than the inner diameter of the end near the nose plug.

[0015] In some embodiments, the air intake further includes an air intake seat having an air intake chamber and an opening communicating with the outside. The air intake seat is sealed and installed at the air intake port, and the air intake pipe is connected to the air intake seat and communicates with the air intake chamber.

[0016] In some embodiments, the air intake seat is provided with an exhaust passage that connects the gas chamber to the outside.

[0017] In some embodiments, the nasal plug includes a connecting section, a sealing section, and an insertion section connected in sequence, wherein the connecting section is connected to the air outlet, the sealing section and the insertion section are used to form a seal with the nasal cavity, the insertion section is used to guide the nasal plug into the nasal cavity, and the air inlet tube extends into the connecting section and forms the gap channel between the connecting section and the connecting section.

[0018] In some embodiments, the diameter of the sealing section is greater than the diameter of the connecting section and greater than the diameter of the insertion section, the diameter of the insertion section is configured to gradually increase toward the sealing section, the diameter of the sealing section is configured to first increase and then decrease, and the diameter of the connecting section remains unchanged.

[0019] In some embodiments, the length of the intake pipe inserted into the connecting segment is more than half the length of the connecting segment.

[0020] In some embodiments, the size of the gap channel is 1.5mm-3mm.

[0021] In some embodiments, the air inlet and the air outlet are located on opposite sides of the main body.

[0022] In some embodiments, the main body also includes an exhaust port communicating with the gas chamber.

[0023] In some embodiments, the exhaust port is located on the main body portion between the air inlet and the air outlet.

[0024] In some embodiments, the exhaust port is located on the side of the main body where the air inlet is located.

[0025] In some embodiments, the nasal mask includes a liner assembly comprising a liner and an inner support mounted within the liner, the main body and the nasal seal being formed by the liner, the air intake being formed by the inner support, the liner being made of a flexible sealing material, and the inner support having a hardness greater than or equal to that of the liner.

[0026] In some embodiments, the inner support is connected to the main body via a first snap-fit ​​structure.

[0027] In some embodiments, the exhaust port is located at the top of the main body when it is in the wearing state, the inner bracket includes a support wall, the support wall is supported in the main body corresponding to the exhaust port, and the support wall is provided with a communication port connecting the gas chamber and the exhaust port; preferably, a positioning structure is provided between the main body and the support wall.

[0028] In some embodiments, the nasal mask further includes a frame assembly, to which the pad assembly is mounted, the frame assembly being used to connect to an inhaled gas source and a patient's head, and to provide inhaled gas from the inhaled gas source to the pad assembly; preferably, the pad assembly is mounted to the frame assembly via an inner support.

[0029] In some embodiments, the pad assembly further includes an outer support mounted outside the pad, the outer support having a stiffness greater than that of the pad.

[0030] In some embodiments, the outer bracket includes an annular mounting portion and a mounting wall extending axially outward from one side of the annular mounting portion. The main body is provided with an annular mounting groove for the annular mounting portion to be fitted around the air inlet. The outer side of the main body is provided with a wall mounting groove for the mounting wall to be fitted. The exhaust port is opened on the bottom wall of the wall mounting groove. The mounting wall is provided with an external exhaust port communicating with the exhaust port.

[0031] In some embodiments, the frame assembly includes a connecting strap, a mounting base, and an air tube. The connecting strap is for connection to a patient's head, the mounting base is disposed on one side of the connecting strap and for mounting to the pad assembly, and the air tube is disposed on the opposite side of the connecting strap and for connection to the inhaled gas source. The air tube communicates with the mounting base to provide inhaled gas from the inhaled gas source to the pad assembly through the mounting base.

[0032] In some embodiments, the inner support is provided with a limiting part for axially limiting the annular mounting part.

[0033] In some embodiments, the mounting base includes an annular mounting wall and a venting cavity defined by the annular mounting wall, the venting cavity being connected to the venting pipe via a communication port on the connecting strip, and the annular mounting wall being connected to the inner support via a second snap-fit ​​structure.

[0034] This utility model also provides a nasal high-flow humidified oxygen therapy system, including the nasal mask for nasal high-flow humidified oxygen therapy described above.

[0035] The nasal mask of this invention has an air inlet on the main body of the nasal mask, and the air inlet is located at least partially inside the nasal sealing part, so that air is supplied directly to the nasal sealing part through the air inlet; at the same time, the nasal sealing part can be sealed to the inner wall of the nasal cavity, so that a gap channel is formed between the air inlet and the nasal sealing part, and the exhaled air entering the nasal sealing part is guided to the main body and discharged from the main body through the gap channel. During use, inhaled gas is supplied to the nasal seal through the air inlet, which is located near the nasal cavity, ensuring that the inhaled gas enters the nasal cavity at a stable pressure with minimal loss. Since the nasal seal is sealed to the inner wall of the nasal cavity without any gaps, exhaled gas enters the nasal seal and is then guided through the gap channel to the main body for discharge. Because exhaled gas enters the nasal seal, it affects the pressure of the inhaled gas supplied by the air inlet, reducing the outflow pressure of the inhaled gas supplied by the air inlet. This increases the pressure change between the patient's inhalation and exhalation phases, improves the signal-to-noise ratio, and results in a stronger signal fed back to the HFNC device. This allows the HFNC device to better calculate the pressure during the inhalation and exhalation phases, identify inhalation triggers and exhalation triggers, and thus achieve precise control of the inhaled gas supply by the HFNC device.

[0036] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0037] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings: Figure 1 This is a perspective view of one embodiment of the gasket assembly in this utility model; Figure 2 yes Figure 1 Top view of the middle liner assembly; Figure 3 yes Figure 1 Front view of the middle liner assembly; Figure 4 yes Figure 1 Rear view of the center liner assembly; Figure 5 yes Figure 1 Cross-sectional view of the middle liner assembly; Figure 6 yes Figure 1 Another sectional view of the middle liner assembly; Figure 7 yes Figure 1 A perspective view of the liner of the middle liner assembly; Figure 8 yes Figure 1A three-dimensional view of the inner support structure of the middle liner assembly; Figure 9 yes Figure 8 Bottom view of the inner support structure; Figure 10 yes Figure 1 A perspective view of the outer support frame of the middle liner assembly; Figure 11 yes Figure 10 A three-dimensional view of the Chinese and foreign support structures from another angle; Figure 12 This is a perspective view of one embodiment of the frame component in this utility model; Figure 13 This is a perspective view of one embodiment of the nose mask of this utility model; Figure 14 yes Figure 13 Exploded view of the mid-nose mask; Figure 15 This is a perspective view of another embodiment of the gasket assembly in this utility model; Figure 16 yes Figure 15 Cross-sectional view of the middle liner assembly; Figure 17 This is a perspective view of another embodiment of the nose mask of this utility model; Figure 18 yes Figure 17 An exploded view of the mid-nose mask.

[0038] Explanation of reference numerals in the attached figures 10-Pad assembly, 11-Pad, 111-Main body, 1111-Positioning hole, 1112-Wall mounting groove, 1113-Annular flange, 1114-Annular mounting groove, 112-Gas chamber, 113-Nose plug, 1131-Connecting section, 1132-Sealing section, 1133-Insertion section, 114-Air inlet, 115-Air outlet, 116-Exhaust port, 12-Inner support, 121-Air inlet pipe, 122-Air inlet seat, 1221-Annular slot, 123-Air inlet chamber, 124-Opening, 125-Exhaust passage, 126-Support wall, 1261-Connecting port, 1262-Positioning post, 127-Limiting part, 128-Snap fastener, 13-Outer support, 131-Annular mounting part, 132-Mounting wall, 1321-External exhaust port, 14-Gap passage; 20-Frame assembly, 21-Connecting strap, 211-Headband connection, 212-Clearing opening, 22-Mounting base, 221-Annular mounting wall, 222-Ventilation chamber, 223-Slot, 23-Ventilation pipe. Detailed Implementation

[0039] The embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of this utility model by way of example, but should not be used to limit the scope of this utility model. This utility model can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0040] These embodiments are provided to make the present invention thorough and complete, and to fully express the scope of the present invention to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions and values ​​set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0041] It should be noted that, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationships, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0042] Furthermore, the terms "first," "second," and similar words used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range. Words such as "including" or "comprising" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well.

[0043] It should also be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device.

[0044] All terms used in this invention have the same meaning as understood by one of ordinary skill in the art to which this invention pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0045] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0046] Traditional nasal oxygen cannulas consist of a main body and two nasal plugs. The main body defines a gas chamber and has an inlet and two outlets connected to the gas chamber. The two nasal plugs are connected to the two outlets respectively. During use, inhaled air enters the gas chamber through the inlet, then flows sequentially through the outlets and nasal plugs into the patient's nasal cavity; exhaled air is expelled through the gap between the nasal plug and the nasal cavity. This results in relatively uniform pressure changes in the breathing circuit (located within the main unit of the HFNC device) connected to the inlet throughout the entire breathing process. Pressure monitoring makes it difficult to determine the patient's respiratory stage, thus hindering the precise delivery of gas according to their needs.

[0047] To address the aforementioned problems, this invention provides a nasal mask for high-flow humidified oxygen therapy via the nose, see [link to relevant documentation]. Figures 1-6 or Figures 15-16 The nasal mask includes a main body 111 and an air inlet and a nasal sealing part disposed on the main body 111. The nasal sealing part is configured to be able to seal against the inner wall of the nasal cavity. The air inlet is at least partially located within the nasal sealing part to provide inhaled gas to the nasal sealing part. The portion of the air inlet located within the nasal sealing part has a gap channel 14 between itself and the inner wall of the nasal sealing part to guide exhaled gas entering the nasal sealing part to the main body 111 and discharged from the main body 111.

[0048] The nasal mask of this invention provides an air inlet on the main body 111 of the nasal mask, and the air inlet is located at least partially inside the nasal sealing part, so that air is supplied directly to the nasal sealing part through the air inlet; at the same time, the nasal sealing part can be sealed to the inner wall of the nasal cavity, so that a gap channel is formed between the air inlet and the nasal sealing part, and the exhaled air entering the nasal sealing part is guided to the main body and discharged from the main body through the gap channel. During use, inhaled gas is supplied to the nasal seal through the air inlet, which is located near the nasal cavity, ensuring that the inhaled gas enters the nasal cavity at a stable pressure. Since the nasal seal is sealed to the inner wall of the nasal cavity without any gaps, exhaled gas enters the nasal seal and is then guided through the gap channel to the main body for discharge. Because exhaled gas enters the nasal seal, it affects the pressure of the inhaled gas supplied by the air inlet, reducing the outflow pressure of the inhaled gas supplied by the air inlet. This increases the pressure change between the patient's inhalation and exhalation phases, improves the signal-to-noise ratio, and results in a stronger signal fed back to the HFNC device. This allows the HFNC device to better calculate the pressure during the inhalation and exhalation phases, identify inhalation triggers and exhalation triggers, and thus achieve precise control of the inhaled gas supply by the HFNC device.

[0049] In this utility model, see Figures 5-7 The main body 111 includes a gas chamber 112, an air inlet 114 and an air outlet 115 communicating with the gas chamber 112, a nasal seal connected to and communicating with the air outlet 115, a gap channel 14 communicating with the gas chamber 112, and an air inlet disposed within the gas chamber 112 and extending from the air inlet 114 into the nasal seal. Inhaled gas can directly enter the air inlet through the air inlet 114 and is supplied to the nasal seal by the air inlet.

[0050] In this invention, the hardness of the air intake is preferably greater than that of the nasal seal. For example, the nasal seal is preferably made of silicone, while the air intake is preferably made of plastic. Using plastic, a harder material, prevents the air intake from deforming under certain air pressure, thus fixing the air intake channel area and consequently the air resistance of the nasal mask. This makes it easier for the HFNC device to calculate the patient's inspiratory flow, resulting in more accurate pressure detection at the patient end. Furthermore, since the air intake is located inside the nasal seal and does not directly contact the patient's nasal cavity, using a harder material will not cause discomfort to the patient.

[0051] In this invention, the main body 111 may also include an exhaust port 116 that communicates with the gas chamber 112.

[0052] In this invention, the air inlet 114, air outlet 115, and exhaust outlet 116 can be located at any suitable position on the main body 111. Preferably, see [reference needed]. Figure 7The air inlet 114 and the air outlet 115 are located on opposite sides of the main body 111. As for the exhaust outlet 116, in a preferred embodiment, see [link to description]. Figure 7 The exhaust port 116 is located on the main body 111 between the air inlet 114 and the air outlet 115; in another preferred embodiment, see... Figure 15 The exhaust port 116 is located on the same side of the main body 111 as the air inlet 114 is located, that is, the exhaust port 116 and the air inlet 114 are located on the same side of the main body 111.

[0053] In this invention, the main body 111 may have at least one air outlet 115, the nasal seal may include at least one nasal plug 113, the nasal plug 113 is connected to the air outlet 115, and the air inlet may include at least one air inlet pipe 121, the air inlet pipe 121 extends from the air inlet 114 into the nasal plug 113, and a gap channel 14 is formed between the air inlet pipe 121 and the nasal plug 113 for exhaled gas to enter the gas chamber 112.

[0054] Specifically, such as Figure 5 and Figure 6 As shown, the main body 111 has two air outlets 115, the nasal seal includes two nasal plugs 113, which are respectively connected to the two air outlets 115, and the air inlet includes two air inlet pipes 121, which extend from the air inlet 114 into the two nasal plugs 113. A gap channel 14 is formed between the air inlet pipes 121 and the nasal plugs 113 to allow exhaled air to enter the gas chamber 112. The gap channel 14 ensures that exhaled air enters the gas chamber 112 and is discharged from the exhaust port 116, and also allows the exhaled air to affect the intake air pressure of the air inlet pipes 121 within the nasal plugs 113.

[0055] In this utility model, see Figure 5 The air intake pipe 121 can be configured to extend in an arc from the air intake port 114 toward the nose plug 113, and the two ends of the two air intake pipes 121 near the nose plug 113 are close to each other. The inner diameter of the end of the air intake pipe 121 near the air intake port 114 is larger than the inner diameter of the end near the nose plug 113.

[0056] In this utility model, such as Figure 5 and Figure 6In the illustrated embodiment, the nasal plug 113 may include a connecting section 1131, a sealing section 1132, and an insertion section 1133 connected in sequence. The connecting section 1131 is connected to the air outlet 115. The sealing section 1132 and the insertion section 1133 form a seal with the nasal cavity. The insertion section 1133 guides the nasal plug 113 into the nasal cavity. The air inlet tube 121 extends into the connecting section 1131, forming a gap channel 14 between them. This ensures that the exhaled air affects the ventilation pressure of the inhaled air, making it easy to detect pressure changes and accurately reduce pressure output during exhalation. It also avoids discomfort caused by the air inlet tube 121 acting on the nasal cavity. It should be noted that, depending on the size of the nostrils, the nasal plug 113 forms a seal with the nasal cavity at either the sealing section 1132 or the insertion section 1133.

[0057] Among them, such as Figure 5 As shown, the diameter of the sealing section 1132 is larger than the diameter of the connecting section 1131 and larger than the diameter of the insertion section 1133. The diameter of the insertion section 1133 is set to gradually increase towards the sealing section 1132. The diameter of the sealing section 1132 is set to first increase and then decrease. The diameter of the connecting section 1131 remains unchanged.

[0058] Preferably, the length of the intake pipe 121 inserted into the connecting section 1131 is more than half the length of the connecting section 1131. The size of the gap channel 14 is preferably 1.5mm-3mm, which avoids the gap being too large, causing the connecting section 1131 to become too large and thus lose its original function, and also avoids the gap being too small, causing the exhalation path area to be too small, making it easy to feel short of breath.

[0059] In this utility model, such as Figure 15 and Figure 16 In the embodiment shown, the nasal plug 113 can also be a cone shape with a diameter that gradually increases toward the main body 111, and the length of the air inlet tube 121 inserted into the nasal plug 113 can be less than or equal to half of the axial length of the nasal plug 113.

[0060] In this invention, the air intake section may further include an air intake seat 122, which has an air intake chamber 123 and an opening 124 connecting the air intake chamber 123 to the outside. The air intake seat 122 is sealed and installed at the air intake port 114, and the air intake pipe 121 is connected to the air intake seat 122 and communicates with the air intake chamber 123. In use, the inhaled air can enter the air intake chamber 123 through the opening 124, and then flow from the air intake chamber 123 into the two air intake pipes 121.

[0061] In some implementations, see Figure 15 and Figure 16With the air intake seat 122, an exhaust passage 125 connecting the gas chamber 112 to the outside can be provided on the air intake seat 122, and an exhaust port 116 can be formed by the exhaust passage 125. That is to say, the exhaust port 116 is not provided on the main body 111, or in other words, the exhaust port 116 and the air intake 114 are the same, the air intake seat 122 is installed at the air intake 114, so that the opening 124 on the air intake seat 122 becomes the air intake for inhaled gas, and the exhaust passage 125 on the air intake seat 122 becomes the exhaust port for exhaled gas. It should be noted that the exhaust passage 125 is not connected to the air intake chamber 123. Further, as Figure 15 As shown, the air intake seat 122 may be provided with multiple exhaust channels 125, which may be located on both sides of the opening 124.

[0062] In this invention, the main body 111, air inlet, and nasal sealing part of the nasal mask can be integrally formed or assembled from different parts, so as to achieve high flexibility in material selection, manufacturing method, and structural design, thereby facilitating the provision of nasal masks that are more comfortable to wear and have better performance.

[0063] For example, in some embodiments, the nasal mask may include a pad assembly 10, which includes a pad 11 and an inner support 12 installed within the pad 11. The main body 111 and the nasal seal are formed by the pad 11, and the air intake is formed by the inner support 12. The pad 11 is made of a flexible sealing material, and the hardness of the inner support 12 is greater than or equal to that of the pad 11. In some embodiments, the main body 111, the air intake, and the nasal seal are assembled from different components. The main body 111 and the nasal seal are formed by the pad 11 made of a flexible sealing material, which ensures a flexible and sealed contact between the nasal mask and the patient's nasal cavity, reducing damage to the nasal cavity and discomfort during wear. The air intake is formed by the inner support 12, which has a hardness greater than or equal to that of the pad 11. The inner support 12 is supported within the pad 11, which ensures the structural stability of the pad assembly 10 and the reliability and stability of its assembly with the frame assembly.

[0064] The pad 11 and the inner support 12 can be assembled in any suitable manner. For example, in some embodiments, the inner support 12 can be connected to the main body 111 of the pad 11 via a first snap-fit ​​structure. To improve the reliability of the assembly of the pad 11 and the inner support 12, the first snap-fit ​​structure may include a mutually adaptable annular groove 1221 and an annular flange 1113, wherein the annular groove 1221 is disposed on one of the inner support 12 and the main body 111, and the annular flange 1113 is disposed on the other of the inner support 12 and the main body 111.

[0065] Specifically, see Figures 5-9The first snap-fit ​​structure includes an annular slot 1221 provided on the air intake seat 122 and an annular flange 1113 provided on the main body 111 that is adapted to the annular slot 1221. The annular flange 1113 is provided around the air intake 114, and the annular slot 1221 is provided around the circumference of the air intake seat 122.

[0066] In this invention, to better support the pad 11 and ensure the stability of the pad assembly structure, the inner support 12 may further include a support wall 126. For example... Figure 8 and Figure 9 In the embodiment shown, the support wall 126 can be configured to extend from the air intake seat 122 toward the side where the air intake pipe 121 is located. The support wall 126 can have a shape consistent with the top of the main body 111 so that the support wall 126 can fit against the inner side of the top of the main body 111 and provide better support for it.

[0067] In this invention, the exhaust port 116 can be located at the top of the main body 111, for example... Figure 7 As shown, the opening area of ​​the exhaust port 116 can occupy a large area of ​​the top of the main body 111. In this case, the support wall 126 can be supported in the main body 111 corresponding to the exhaust port 116. The support wall 126 can be provided with a communication port 1261 connecting the gas chamber 112 and the exhaust port 116 (see...). Figure 8 ).

[0068] To ensure that the support wall 126 and the main body 111 are properly assembled and that the connecting port 1261 corresponds to the exhaust port 116, a positioning structure may be provided between the main body 111 and the support wall 126. The positioning structure can have any suitable implementation; specifically, for example… Figure 7 and Figure 8 In the illustrated embodiment, the positioning structure may include positioning posts 1262 disposed on the support wall 126 and positioning holes 1111 disposed on the main body 111 that are adapted to the positioning posts 1262. The positioning posts 1262 can be coaxially inserted into the positioning holes 1111. There may be multiple positioning posts 1262 spaced apart around the communication port 1261, and multiple positioning holes 1111 spaced apart around the exhaust port 116. Each positioning post 1262 corresponds one-to-one with a corresponding positioning hole 1111. It is understood that the positioning posts 1262 and the positioning holes 1111 serve both a positioning and a connecting function.

[0069] In this invention, the padding assembly 10 may further include an outer support 13 installed outside the padding 11, the outer support 13 having a higher hardness than the padding 11. By providing the outer support 13, the structural strength and structural stability of the padding assembly can be further improved. The outer support 13 can be installed on the padding 11 in any manner, and the outer support 13 can have any suitable structure.

[0070] Specifically, in some implementations, such as Figures 10-11 As shown, the outer bracket 13 may include an annular mounting portion 131 and a mounting wall 132 extending axially outward from one side of the annular mounting portion 131. Accordingly, as Figure 7 As shown, the main body 111 is provided with an annular mounting groove 1114 for the annular mounting part 131 to be embedded around the air inlet 114, and the outer side of the main body 111 is provided with a wall mounting groove 1112 for the mounting wall 132 to be embedded. In this way, the outer bracket 13 can be completely embedded in the pad 11, and the outer surface of the outer bracket 13 can be flush with the outer surface of the pad 11, thereby improving the integrity and aesthetics of the nose mask.

[0071] In other implementations, such as Figures 15-16 As shown, the outer bracket 13 may only include an annular mounting part 131, and the main body 111 is provided with an annular mounting groove 1114 for the annular mounting part 131 to be embedded around the air inlet 114.

[0072] To prevent the annular mounting part 131 from detaching from the annular mounting groove 1114, and to improve the firmness of the connection between the gasket 11, the inner bracket 12, and the outer bracket 13, see [reference needed]. Figure 1 , Figure 8 and Figure 15 The inner bracket 12 is provided with a limiting part 127 for axially limiting the annular mounting part 131. For example... Figure 8 and Figure 15 As shown, the limiting part 127 may be a flange that protrudes from the outer peripheral surface of the air intake seat 122, and the limiting part 127 may be a plurality of parts that are circumferentially spaced around the air intake seat 122.

[0073] In this utility model, such as Figure 6 , Figure 7 and Figure 10 As shown, the exhaust port 116 can be formed on the bottom wall of the wall mounting groove 1112. The mounting wall 132 is used to close the communication port 1261 and the exhaust port 116. An external exhaust port 1321 communicating with the exhaust port 116 can be provided on the mounting wall 132. Figure 10 As shown, multiple external exhaust ports 1321 can be provided on the mounting wall 132, and the multiple external exhaust ports 1321 can be spaced apart along the length direction of the mounting wall 132.

[0074] This invention, by setting the exhaust port 116 on the top of the main body 111 and providing multiple external exhaust ports 1321 on the mounting wall 132, enables the exhaled gas to be discharged upwards in a dispersed manner with a small flow rate and pressure, so that the discharge of exhaled gas will not generate noise and will not affect the patient and his bed partner.

[0075] In this invention, the nasal mask may further include a frame assembly 20, with a pad assembly 10 mounted on the frame assembly 20. The frame assembly 20 is used to connect to the inhaled gas source and the patient's head, and to provide inhaled gas from the inhaled gas source to the pad assembly 10.

[0076] In some implementations, such as Figure 12 and Figure 18 As shown, the frame assembly 20 may include a connecting strap 21, a mounting base 22, and an air tube 23. The connecting strap 21 is used to connect to the patient's head. The mounting base 22 is disposed on one side of the connecting strap 21 and is used to install with the padding assembly 10. The air tube 23 is disposed on the opposite side of the connecting strap 21 and is used to connect to an inhaled gas source. The air tube 23 communicates with the mounting base 22 to provide inhaled gas from the inhaled gas source to the padding assembly 10 through the mounting base 22. Headband connecting portions 211 may be provided at both ends of the connecting strap 21, and the headband connecting portions 211 can be connected to a headband.

[0077] In this invention, the padding assembly 10 can be mounted on the frame assembly 20 via the inner bracket 12. Specifically, as shown... Figures 12-14 , Figures 17-18 As shown, the mounting base 22 may include an annular mounting wall 221 and a venting cavity 222 defined by the annular mounting wall 221. The venting cavity 222 is connected to the venting pipe 23 through a connecting port on the connecting strip 21. The annular mounting wall 221 can be connected to the air inlet seat 122 through a second snap-fit ​​structure.

[0078] The second snap-fit ​​structure can be any suitable structure. In some embodiments, the second snap-fit ​​structure may include a buckle 128 and a slot 223 that are adapted to each other. The buckle 128 may be provided on one of the annular mounting wall 221 and the air intake seat 122, and the slot 223 may be provided on the other of the annular mounting wall 221 and the air intake seat 122.

[0079] Specifically, such as Figure 8 and Figure 12 , Figure 15 and Figure 18As shown, the latch 128 can be disposed on the wall surface of the air intake seat 122 that defines the air intake chamber 123, and the slot 223 (for example, an opening formed in the annular mounting wall 221) can be disposed on the annular mounting wall 221. During installation, the annular mounting wall 221 is inserted into the air intake chamber 123, the latch 128 is engaged with the slot 223, and the venting chamber 222 communicates with the air intake chamber 123.

[0080] To improve the stability of the mounting base 22 and the air intake base 122, multiple buckles 128 can be spaced around the wall surface of the air intake cavity 123, and multiple slots 223 can be spaced around the annular mounting wall 221, with each buckle 128 corresponding to a slot 223.

[0081] In this utility model, such as Figures 15-18 As shown, when an exhaust passage 125 is provided on the intake seat 122, a clearance opening 212 can be provided on the connecting strip 21 of the frame assembly 20. When the gasket assembly 10 is installed on the frame assembly 20, the exhaust passage 125 is inserted into the clearance opening 212 to communicate with the outside, and at the same time, it can further connect the gasket assembly and the frame assembly, improving the firmness of the installation.

[0082] Another aspect of this invention provides a nasal high-flow humidified oxygen therapy system, including the aforementioned nasal mask.

[0083] The nasal high-flow humidified oxygen therapy system may further include an HFNC device, which is connected to a nasal mask. By employing the aforementioned nasal mask, the nasal high-flow humidified oxygen therapy system increases the pressure change between the patient's inhalation and exhalation phases, enabling the HFNC device to identify clearer inhalation and exhalation signals. This allows for better calculation of pressure changes during inhalation and exhalation, identification of inhalation and exhalation triggers, and ultimately, precise control of the inhaled gas supply by the HFNC device.

[0084] The HFNC device may include a main unit and a breathing circuit. The main unit is the source of inhaled gas and is connected to a nasal mask via the breathing circuit, specifically to the ventilation tube 23. The main unit may contain a breathing circuit connected to the breathing circuit and a sensor for monitoring the air pressure within the breathing circuit.

[0085] The various embodiments of this utility model have now been described in detail. To avoid obscuring the concept of this utility model, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0086] Although some specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the different embodiments can be combined in any way.

Claims

1. A nasal mask for high-flow humidified oxygen therapy via the nose, characterized in that, The nasal mask includes a main body (111) and an air intake and a nasal seal disposed on the main body (111). The nasal seal is configured to be able to seal against the inner wall of the nasal cavity. The air intake is at least partially located within the nasal seal to provide inhaled gas to the nasal seal. The portion of the air intake located within the nasal seal has a gap channel (14) between itself and the inner wall of the nasal seal to guide exhaled gas entering the nasal seal to the main body (111) and discharged from the main body (111).

2. The nasal mask for high-flow humidified oxygen therapy via the nose according to claim 1, characterized in that, The main body (111) includes a gas chamber (112) and an air outlet (115) communicating with the gas chamber (112). The nasal seal is connected to and communicates with the air outlet (115). The gap channel (14) communicates with the gas chamber (112); and / or The hardness of the air intake is greater than that of the nose seal.

3. The nasal mask for high-flow humidified oxygen therapy via the nose according to claim 2, characterized in that, The nasal seal is made of silicone, and the air intake is made of plastic.

4. The nasal mask for high-flow humidified oxygen therapy via the nose according to claim 2, characterized in that, The main body (111) also includes an air inlet (114) communicating with the gas chamber (112), the air inlet being disposed in the gas chamber (112) and extending from the air inlet (114) into the nose seal.

5. The nasal mask for high-flow humidified oxygen therapy via the nose according to claim 4, characterized in that, The main body (111) has at least one air outlet (115), the nasal seal includes at least one nasal plug (113) connected to the air outlet (115), the air inlet includes at least one air inlet pipe (121) extending from the air inlet (114) into the nasal plug (113), and the gap channel (14) is formed between the air inlet pipe (121) and the nasal plug (113).

6. The nasal mask for high-flow humidified oxygen therapy via the nose according to claim 5, characterized in that, The main body (111) has two air outlets (115), the nasal seal includes two nasal plugs (113), and the air inlet includes two air inlet pipes (121); and / or The air intake section also includes an air intake seat (122), which has an air intake chamber (123) and an opening (124) connecting the air intake chamber (123) to the outside. The air intake seat (122) is sealed and installed at the air intake port (114). The air intake pipe (121) is connected to the air intake seat (122) and communicates with the air intake chamber (123).

7. The nasal mask for high-flow humidified oxygen therapy via the nose according to claim 6, characterized in that, The air intake seat (122) is provided with an exhaust channel (125) that connects the gas chamber (112) to the outside.

8. The nasal mask for high-flow humidified oxygen therapy via the nose according to claim 6, characterized in that, The air intake pipe (121) is configured to extend in an arc from the air inlet (114) toward the nose plug (113), and the two ends of the two air intake pipes (121) near the nose plug (113) are close to each other.

9. The nasal mask for high-flow humidified oxygen therapy via the nose according to claim 6, characterized in that, The inner diameter of the end of the air intake pipe (121) near the air inlet (114) is larger than the inner diameter of the end near the nose plug (113).

10. The nasal mask for high-flow humidified oxygen therapy via the nose according to claim 6, characterized in that, The nasal plug (113) includes a connecting section (1131), a sealing section (1132), and an insertion section (1133) connected in sequence. The connecting section (1131) is connected to the air outlet (115). The sealing section (1132) and the insertion section (1133) are used to form a seal with the nasal cavity. The insertion section (1133) is used to guide the nasal plug (113) into the nasal cavity. The air inlet tube (121) extends into the connecting section (1131) and forms the gap channel (14) between the connecting section (1131) and the connecting section (1131).

11. The nasal mask for high-flow humidified oxygen therapy via the nose according to claim 10, characterized in that, The length by which the intake pipe (121) is inserted into the connecting section (1131) is more than half the length of the connecting section (1131).

12. The nasal mask for high-flow humidified oxygen therapy via the nose according to claim 10, characterized in that, The size of the gap channel (14) is 1.5mm-3mm.

13. The nasal mask for high-flow humidified oxygen therapy via the nose according to claim 10, characterized in that, The diameter of the sealing section (1132) is greater than the diameter of the connecting section (1131) and greater than the diameter of the insertion section (1133). The diameter of the insertion section (1133) is set to gradually increase toward the sealing section (1132). The diameter of the sealing section (1132) is set to first increase and then decrease. The diameter of the connecting section (1131) remains unchanged.

14. The nasal mask for high-flow humidified oxygen therapy via the nose according to claim 4, characterized in that, The air inlet (114) and the air outlet (115) are located on two opposite sides of the main body (111), and / or The main body (111) also includes an exhaust port (116) communicating with the gas chamber (112).

15. The nasal mask for high-flow humidified oxygen therapy via the nose according to claim 14, characterized in that, The exhaust port (116) is located on the main body (111) between the air inlet (114) and the air outlet (115), or the exhaust port (116) is located on the side of the main body (111) where the air inlet (114) is located.

16. The nasal mask for high-flow humidified oxygen therapy via the nose according to claim 14, characterized in that, The nasal mask includes a pad assembly (10), which includes a pad (11) and an inner support (12) installed within the pad (11). The main body (111) and the nasal seal are formed by the pad (11), and the air intake is formed by the inner support (12). The pad (11) is made of a flexible sealing material, and the hardness of the inner support (12) is greater than or equal to that of the pad (11).

17. The nasal mask for high-flow humidified oxygen therapy via the nose according to claim 16, characterized in that, The inner support (12) is connected to the main body (111) via a first snap-fit ​​structure, and / or The exhaust port (116) is located at the top of the main body (111) when it is in the wearing state. The inner bracket (12) includes a support wall (126), which is supported in the main body (111) corresponding to the exhaust port (116). The support wall (126) is provided with a communication port (1261) that connects the gas chamber (112) and the exhaust port (116).

18. The nasal mask for high-flow humidified oxygen therapy via the nose according to claim 17, characterized in that, A positioning structure is provided between the main body (111) and the support wall (126).

19. The nasal mask for high-flow humidified oxygen therapy via the nose according to claim 16, characterized in that, The nasal mask also includes a frame assembly (20), to which the pad assembly (10) is mounted. The frame assembly (20) is used to connect to an inhaled gas source and the patient's head, and to provide inhaled gas from the inhaled gas source to the pad assembly (10); and / or The pad assembly (10) further includes an outer bracket (13) mounted outside the pad (11), the outer bracket (13) having a higher hardness than the pad (11).

20. The nasal mask for high-flow humidified oxygen therapy via the nose according to claim 19, characterized in that, The padding assembly (10) is mounted to the frame assembly (20) via the inner bracket (12).

21. The nasal mask for high-flow humidified oxygen therapy via the nose according to claim 19, characterized in that, The outer bracket (13) includes an annular mounting portion (131) and a mounting wall (132) extending axially outward from one side of the annular mounting portion (131). The main body (111) has an annular mounting groove (1114) around the air inlet (114) for the annular mounting portion (131) to be fitted. The outer surface of the main body (111) has a wall mounting groove (1112) for the mounting wall (132) to be fitted. The exhaust port (116) is located on the bottom wall of the wall mounting groove (1112). The mounting wall (132) has an external exhaust port (1321) communicating with the exhaust port (116); and / or The frame assembly (20) includes a connecting strap (21), a mounting base (22), and an air tube (23). The connecting strap (21) is used to connect to the patient's head. The mounting base (22) is disposed on one side of the connecting strap (21) and used to install with the pad assembly (10). The air tube (23) is disposed on the opposite side of the connecting strap (21) and used to connect with the inhaled gas source. The air tube (23) communicates with the mounting base (22) to provide inhaled gas from the inhaled gas source to the pad assembly (10) through the mounting base (22).

22. The nasal mask for high-flow humidified oxygen therapy via the nose according to claim 21, characterized in that, The inner bracket (12) is provided with a limiting part (127) for axially limiting the annular mounting part (131); and / or The mounting base (22) includes an annular mounting wall (221) and a ventilation cavity (222) defined by the annular mounting wall (221). The ventilation cavity (222) is connected to the ventilation pipe (23) through a communication port opened on the connecting strip (21). The annular mounting wall (221) is connected to the inner bracket (12) through a second snap-fit ​​structure.

23. A nasal high-flow humidified oxygen therapy system, characterized in that, Includes the nasal mask for high-flow humidified oxygen therapy via the nose as described in any one of claims 1-22.

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