Supraglottic positive pressure airway and application thereof

Abstract

The invention relates to the technical field of medical instruments, in particular to a supraglottic positive pressure airway and application thereof.The supraglottic positive pressure airway achieves excellent positioning precision and stability through the innovation points such as concave cavity layered design, epiglottis support, arc-shaped groove and multi-channel design, meanwhile has good ventilation and drainage functions, and has the advantages of being simple in structure and convenient to use. According to the novel structural design, the epiglottis is lifted and matched with the throat, the problem that the throat is not completely closed in the prior art can be effectively solved, and therefore the safety and effectiveness of airway management are remarkably improved, the defects in the prior art are overcome, and more reliable technical support is provided for clinical airway management.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and in particular to a supraglottic positive pressure ventilation system and its application. Background Technology

[0002] A laryngeal mask airway (LMA) is a medical device used for airway management during general anesthesia or emergency care. It falls between a face mask and an endotracheal tube, and can be used alone or in combination with an endotracheal tube as a endotracheal intubation component. Since its invention by British physician Dr. Archie Brain in the 1980s, the LMA has become a widely used airway management tool in clinical anesthesia and emergency medicine. Compared to traditional endotracheal intubation, the LMA offers advantages such as ease of operation, minimal airway damage, and slight hemodynamic impact, making it particularly suitable for short surgeries, difficult airways, and ventilation support in emergency situations.

[0003] Subsequently, many new versions of the laryngeal mask airway (LMA) design emerged. Among them, Dr. Donald Miller invented the SLIPA, building upon the pharyngeal plaster model. The initial motivation for this LMA design stemmed from reports of reflux aspiration during LMA application. Therefore, Dr. Donald Miller designed an enlarged cavity without an air sac based on the shape of the plaster, attempting to reduce the risk of reflux aspiration from previous LMAs by capturing refluxed material.

[0004] In addition, i-gel is a laryngeal mask invented by Dr. Muhammed Nasir of Pakistan, who proposed the "nine-point fit" theory. The design of this laryngeal mask does not require the use of an inflatable bladder. The mask body is made of a thermoplastic elastomer, which is believed to be able to be soft and fit the throat.

[0005] The three laryngeal masks mentioned above are representative of commonly used supraglottic positive pressure airways, and their design is based on the concepts of Dr. Archie Brian. With the development of medical technology, laryngeal masks have undergone several improvements aimed at enhancing sealing, reducing the risk of regurgitation and aspiration, increasing ventilation efficiency, and adapting to different clinical needs. Despite the numerous advantages that laryngeal masks have demonstrated in clinical applications, some technical limitations still exist: Insertion difficulties: Due to an oversized cuff or improper operation causing the tongue to become entangled in the mask, the laryngeal mask may be difficult to insert properly, potentially leading to frenulum tearing. In the past, the success rate of first-time laryngeal mask insertion was only 57.7%-71%.

[0006] Insufficient sealing performance and poor stability (mainly manifested as air leakage and displacement): Traditional laryngeal masks are prone to displacement and air leakage during prolonged surgical use, changes in patient position, or high airway pressure, affecting ventilation effectiveness. The main reason is poor anatomical alignment; they only achieve functional alignment, not anatomical alignment. Studies show that the anatomical alignment rate in clinical application is only 29%. A potential risk of using a laryngeal mask is incomplete airway closure; when the airway pressure exceeds 20 cmH2O, air leakage will occur.

[0007] Risk of reflux and aspiration: Traditional laryngeal masks are prone to air leakage. When air leakage occurs, most of the air will enter the stomach, causing increased gastric pressure and making reflux more likely. The refluxed material enters the laryngeal mask cuff, causing aspiration. The risk of aspiration pneumonia is greatly increased, especially in patients with a full stomach.

[0008] Damage to patients: Traditional laryngeal masks can still cause damage to patients, mainly manifested as: blood when the laryngeal mask is removed, damage to the patient's laryngopharyngeal tissue; postoperative throat pain; postoperative hoarseness; cricoarytenoid joint dislocation, etc.

[0009] To address the aforementioned issues, it is necessary to improve the design of the laryngeal mask airway and related components to enhance its compatibility with human anatomy, reduce damage to laryngeal tissues, improve post-implantation stability, and optimize the implementation of endotracheal intubation. In particular, by innovatively elevating the epiglottis and matching it with the laryngeal inlet, the problem of incomplete laryngeal inlet closure in existing technologies can be effectively solved, thereby significantly improving the safety and effectiveness of airway management. Based on these needs, this invention proposes a design scheme and application of a supraglottic positive pressure airway, aiming to overcome the shortcomings of existing technologies and provide more reliable technical support for clinical airway management. Summary of the Invention

[0010] To address the problems of significant vocal cord damage, low ventilation efficiency, and unstable positioning during existing endotracheal intubation procedures, this invention provides a supraglottic positive pressure ventilation system and its application, as detailed below: The present invention provides a supraglottic positive pressure ventilation channel, including a mask and a conduit connected to the mask; a cavity is formed on the inner side of the mask, and an airway is provided in the conduit, the airway communicating with the cavity; an arc-shaped groove is formed on the back of the mask starting from the center of the head of the mask along the axial direction of the mask, and the opening width and groove depth of the arc-shaped groove are adapted to the curvature of the spine at the back of the human larynx.

[0011] Furthermore, the far end of the cover is provided with two spaced-apart pear-shaped recesses.

[0012] Furthermore, drainage channels are respectively provided in the two pear-shaped fossa fitting portions of the cover. The drainage channels are set independently from the airway and extend upward along the inside of the cover into the duct, located on both sides of the airway. The drainage channel outlets are located at the front end of the cover head or slightly below the sides of the head, consistent with the human anatomical structure, facilitating operation and use.

[0013] Furthermore, the concave cavity is divided into a first concave cavity and a second concave cavity from the outer periphery to the center, wherein the second concave cavity is an extension of the airway inside the duct and is connected to the airway. The size and slope of the first concave cavity are adapted to the anatomical structure of the human laryngeal opening, and are used to elevate the second concave cavity and wrap the outer edge of the human laryngeal opening within the first concave cavity.

[0014] Furthermore, the first cavity and the second cavity are smoothly connected and integrally formed to create a cavity with a gradually decreasing opening curvature. The opening curvature of the first cavity tends to be steep on both sides and gentle in the middle, so as to better adapt to the anatomical structure of the human throat.

[0015] Furthermore, an epiglottis support is provided on the inner side of the mask near the head of the mask. When the mask is inserted, the epiglottis of the human laryngopharynx is limited on the epiglottis support, so that the human laryngeal opening is wrapped in the first concave cavity and the human glottis is aligned with the second concave cavity.

[0016] Furthermore, a pair of protruding structures are designed at the junction of the head of the cover and the epiglottis at the base of the tongue, which fits in close contact with the epiglottis at the base of the tongue, further enhancing the fixation effect of the cover.

[0017] In addition, the present invention also provides an application of the supraglottic positive pressure ventilation channel, specifically its use as a standalone endotracheal ventilation system or its use in conjunction with an endotracheal tube to form an endotracheal tube assembly for endotracheal ventilation.

[0018] Furthermore, as a preferred embodiment, in order to better ensure the intubation effect and reduce operative trauma, the endotracheal tube used in conjunction with the positive pneumatic channel on the glottis of the present invention has a tubular structure with a closed top, and the closed top is wedge-shaped, which is adapted to the shape of the glottis of the human body.

[0019] Through the above technical solution, the present invention achieves the following technical effects: The arc-shaped groove structure of the supraglottic positive pressure airway is designed based on the fact that the posterior wall of the laryngopharynx is back to the cervical spine in the anatomical structure. This structural design can ensure that the back of the supraglottic positive pressure airway of the present invention can form a good and tight fit with the cervical spine. While conforming to the physiological and anatomical structure, it can also be docked more stably, so that the supraglottic positive pressure airway produces a more stable effect after being placed in the human laryngopharynx. The innovative features of the concave layered design of the supraglottic positive pressure airway and the epiglottis are further improvements on the alignment of the anatomically dissected structures based on the arc-shaped groove, which makes the supraglottic positive pressure airway more airtight and more accurate in positioning, thereby reducing trauma to the patient. The design of the pyriform fossa fitting and the internal double drainage channels allows for the simultaneous operation of gastric tube insertion and sputum suction, reducing the risk of reflux and aspiration. (4) The structure of the supraglottic positive pressure airway of the present invention provides more options for respiratory management needs in a variety of complex scenarios. In particular, by integrating the advantages of the new endotracheal tube as an endotracheal tube component, it provides clinicians with a more reliable tool option, which is suitable for respiratory management needs in a variety of complex scenarios. Moreover, the above improvements significantly reduce the risk of tissue damage during the insertion process, while ensuring efficient ventilation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the positive pressure ventilation channel structure above the glottis with an arc-shaped groove on the back, as described in Embodiment 1 of the present invention. Figure 2 This is a schematic diagram of the supraglottic positive pressure ventilation channel with a pear-shaped fossa fitting portion according to Embodiment 2 of the present invention; Figure 3 The supraglottic positive pressure ventilation channel of Embodiment 2 of the present invention is provided with a piriform fossa fitting part and a three-channel structure, wherein (a) indicates that the drainage channel outlet is located at the front end of the head, and (b) indicates that the drainage channel outlet is located at the lower part of the sides of the head; Figure 4 This is a schematic diagram of the cover portion of the positive pressure ventilation channel above the glottis in Embodiment 3 of the present invention; Figure 5 This is a schematic diagram of the protrusion structure of the positive pressure ventilation channel on the glottis of the present invention; Figure 6 A schematic diagram of the structure of the human larynx (existing technology); Figure 7 A schematic diagram of the structure of the glottis (existing technology); Figure 8 A top view of the glottis (existing technology); Figure 9 This is a schematic diagram of the supraglottic positive pressure airway of Embodiment 3 of the present invention in a state of proper alignment with the laryngeal opening when used as an intubation assembly. Figure 10 This is a schematic diagram of the existing endotracheal intubation assembly in its mating state with the laryngeal opening. Figure 11 This is a schematic diagram of the structure of the novel endotracheal tube in the endotracheal intubation assembly of Embodiment 4 of the present invention; Figure 12These are the front and front views of the new type of endotracheal tube, showing the alignment of the inverted V-shaped structure at the tube tip with the glottis. Figure 13 This is a schematic diagram of the overall structure of the endotracheal intubation assembly in Embodiment 4 of the present invention, showing the combined use of the novel endotracheal intubation tube and the supraglottic positive pressure ventilation channel of the present invention.

[0021] 1. Endotracheal tube body; 2. Tube end; 3. Wedge-shaped tip; 4. Air outlet; 5. Murphy's aperture; 6. Mask body; 7. Tube; 8. Cavity; 9. First cavity; 10. Second cavity; 11. Mask body extension; 12. Epiglottis support; 13. Arc-shaped groove; 14. Protruding structure; 15. Airway; 16. Drainage channel; 17. Drainage channel outlet; 18. Laryngeal mask or other types of supraglottic positive pressure airway with similar function; 19. Piriformis fossa fitting portion; 20. Recess. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] It should be noted that the various installation methods and technical terms mentioned in this invention are all well-known technical terms in the relevant technical field, and therefore will not be explained further. In this application, based on the direction of insertion into the human body, the end closer to the oral cavity entrance is called the 'proximal end', and the end closer to the larynx is called the 'distal end' or 'head'; the side facing the posterior pharyngeal wall is called the 'back' or 'back', and the side facing the root of the tongue is called the 'front'. Furthermore, the same reference numerals are used for the same components, but this does not affect, nor should it constitute, an accurate understanding of the technical solution by those skilled in the art.

[0024] This invention provides a specific embodiment of a supraglottic positive pressure ventilation system and its application, in conjunction with the appendix. Figure 1 To be continued Figure 12 The technical solution is described in detail. This implementation method, through an innovative structural design, elevates the periglenoid and matches it with the laryngeal inlet, effectively solving the problem of incomplete laryngeal inlet closure in existing technologies. This significantly improves the safety and effectiveness of airway management, overcomes the shortcomings of existing technologies, and provides more reliable technical support for clinical airway management.

[0025] Example 1 As a specific implementation of a supraglottic positive pressure ventilation system, such as Figure 1As shown, the mask includes a cover 6 and a conduit 7 connected to the cover 6. An arc-shaped groove 13 is opened on the back of the cover (i.e. the side of the cover near the posterior pharyngeal wall) starting from the center of the cover along the axial direction of the cover. The opening width and groove depth of the arc-shaped groove 13 are adapted to the spine at the back of the human throat. This design enhances the fit of the cover 6 and improves the stability of the product.

[0026] Example 2 Similar to Embodiment 1, except that the distal end of the cover has two spaced-apart pear-shaped recesses 19, such as... Figure 2 , 3 As shown, drainage channels 16 are respectively provided in the two pear-shaped fossa fitting parts of the mask. The drainage channels 16 are set independently from the airways 15 inside the duct. The drainage channels 16 extend upward along the inside of the mask into the duct and are located on both sides of the airway. The drainage channel outlet is located at the front end of the mask head or on the lower side of the head, which is consistent with the human anatomical structure and is convenient for operation and use.

[0027] Example 3 Same as in Example 2, except that, as Figure 4 and 5 As shown, a cavity 8 is formed on the inner side of the cover 6. The outer extension 11 of the cover, as shown, has a certain thickness, and its inner side is smoothly connected to the cavity. The cavity 8 is divided into a first cavity 9 and a second cavity 10 from the outer periphery to the center. The second cavity 10 is an extension of and communicates with the airway 15, used to guide airflow from the airway through the laryngeal inlet into the human airway. The size and slope of the second cavity 10 are adapted to the human laryngeal inlet for precise alignment. The size and slope of the first cavity 9 are adapted to the anatomical structure of the human laryngeal inlet, used to elevate the second cavity 10 and wrap the outer edge of the human laryngeal inlet within the first cavity, achieving complete enclosure of the cover 6 and the laryngeal inlet, ensuring a sealing effect. Figure 4 As shown, to better adapt to the anatomical structure of the human larynx, the first and second concave cavities are smoothly connected and integrally formed to create concave cavities with gradually decreasing opening curvature, and the opening curvature of the first concave cavity tends to be steep at both ends and gentle in the middle. An epiglottic support 12 is provided on the inner side of the cover 6 near the head of the cover. When the cover is inserted, the epiglottis of the human larynx is confined on the epiglottic support, achieving the goal of enveloping the human larynx within the first concave cavity, with the glottis aligned directly with the second concave cavity. A pair of protruding structures 14 are also designed at the junction of the head of the cover 6 with the root of the tongue and the valley of the epiglottis, conforming to the root of the tongue and the valley of the epiglottis, further enhancing the fixation effect of the cover. The distal end of the cover 6 has two spaced-apart protruding piriformis fitting portions 19 and a recessed portion 20 located between the two piriformis fitting portions 19, used to further improve the positioning accuracy and stability of the cover 6. The design of the piriformis fitting portions 19 and the recessed portion 20 allows for better conformation to the anatomical structure of the human piriformis, enhancing the fixation effect of the cover 6.

[0028] To better understand this embodiment, the structure of the human oral cavity—the basis of the structural design of this invention—will be further described: as follows Figure 6-8 As shown, the human oral cavity connects the trachea 101 and the esophagus 102, with the laryngeal inlet 103 located at the junction of the trachea and esophagus. The laryngeal inlet 103 is the upper opening of the laryngeal cavity 104, formed by the upper edge of the epiglottis 105a, the aryepiglottic fold 106, and the interarytenoid notch 107. The glottis 108 is located within the laryngeal cavity 104, that is, in the lower part of the laryngeal inlet 103, and is the opening between the two vocal cords 108a. The aryepiglottic fold 106 is a triangular mucosal fold (fold-non-bone joint) that wraps ligaments and muscle fibers, extending from the lateral edge of the epiglottis to the arytenoid cartilage 109. The fold is triangular, narrow anteriorly, wide posteriorly, and tilts downward and backward. The aryepiglottic fold 106 is restrained anteriorly by the epiglottis 105; posteriorly, it is restrained by the apex of the arytenoid cartilage 109, the concha 110, and the interarytenoid notch 107. The tracheal wall is supported by the cricoid cartilage 111, thus preventing collapse and ensuring unobstructed airflow. The esophagus 102 is normally flattened, only expanding when food enters. The cricoid cartilage 111 is located below the thyroid cartilage 112, resembling a ring. Its anterior portion is narrow and low, called the cricoid arch 111a, while its posterior portion is high and wide, called the cricoid plate 111b. The arytenoid cartilage 109 and the concha 110 are located above the cricoid plate 111b. The tip of the arytenoid cartilage 109 connects to the concha 110. During respiration, the epiglottis 105 rises, and the laryngeal inlet 103 opens to allow airflow into the trachea 101. The vallecula 116 is formed between the epiglottis 105 and the base of the tongue 115. During eating, the epiglottis 105 lowers, closing the laryngeal inlet 103 to prevent food or water from entering the trachea. On both sides of the laryngeal inlet 103, between the inner surface of the thyroid cartilage and the cricoid cartilage, the deep fossa formed by the invagination of the mucosa is called the piriform recess. Strictly speaking, the piriform recess is not a "fossa" but an irregular gap. During eating, food or water falls on the epiglottis 105 and slides to both sides into the piriform recess 113. After passing through the piriform recess 113, it enters the esophagus 102, rather than directly through the post-cricoid space 114 into the esophagus.

[0029] In existing technologies, during the use of a conventional laryngeal mask airway (LMA), medical personnel typically insert the distal end of the mask into the postcricoid space 114 (the space between the cricoid cartilage plate and the posterior pharyngeal wall) to ensure a good seal, applying anterior pressure to the cricoid cartilage 111. Because the distal end of the mask is inserted too deeply, it can damage the connective tissue within the postcricoid space 114, resulting in the mask often having attached tissue and blood when it is removed from the patient's mouth. Furthermore, because the aryepiglottic fold 106 is inclined, the laryngeal inlet 103 is a slanted opening, and the airway opening of a traditional LMA generally faces the laryngeal inlet, not the glottis. Figure 12As shown, this results in an S-shaped bend in the airway inside the laryngeal mask airway, between the glottis and trachea, affecting ventilation efficiency. Furthermore, during endotracheal intubation, if... Figure 12 As shown, the endotracheal tube 100 needs to be bent and inserted directly into the larynx. After entering the larynx, it is bent in the opposite direction to enter the glottis. However, the bent path creates obstacles during the insertion of medical instruments such as endotracheal tubes, bronchial occluders, and endoscopes.

[0030] Based on the above structural design and existing technology, the supraglottic positive pressure airway of this embodiment can be used alone for tracheal ventilation. Specifically, the supraglottic positive pressure airway of this invention is inserted through the patient's oral cavity. The recessed portion 20 of the piriform fossa fitting part of the mask is directly attached to the position of the cricoid cartilage posterior space 114. The upper edge 105a of the epiglottis, the aryepiglottic fold 106 and the interarytenoid notch 107 are completely wrapped into the second cavity of the mask. Then the epiglottis is confined on the epiglottic support 12 and is wrapped in the first cavity of the mask to form a good seal, achieving a good seal for the entire laryngeal inlet. At the same time, the piriform fossa fitting part of the mask fits perfectly with the patient's piriform fossa 113. The drainage channel outlet 17 at the front end of the piriform fossa fitting part or at the lower position on both sides of the head is precisely aligned with the gastroesophageal inlet in the piriform fossa 113. During clinical procedures, after the aforementioned supraglottic positive pressure airway structure is inserted into the laryngopharynx, the airflow introduced does not blow outwards at the airway opening (i.e., the second chamber) as in existing technologies. Figure 12 As shown in the diagram, instead of directly facing the obliquely cut laryngeal inlet, it faces the glottis located below the laryngeal inlet, which helps improve ventilation efficiency. More importantly, during surgical procedures such as endotracheal intubation, bronchial occlusion, and endoscopy, the insertion path is a smooth arc shape, avoiding the previous S-shaped bend. Under normal anatomical conditions and without space-occupying lesions, the success rate of tube insertion can reach 100%, effectively improving tube insertion efficiency. This is a revolutionary change, especially in emergency and critical patient resuscitation.

[0031] Example 4 An endotracheal intubation assembly, specifically, is an endotracheal intubation assembly formed by combining the supraglottic positive pressure airway of the present invention with an endotracheal tube for use in endotracheal ventilation, as detailed in the following embodiments. Figure 9 As shown, this component combines the high-efficiency ventilation of endotracheal tubes with the precise positioning capabilities of supraglottic positive pressure airways, providing a comprehensive solution for complex respiratory management. When used in conjunction with the new endotracheal tube, the structure is as follows: Figure 9As shown, the cover 6 of the supraglottic positive pressure airway achieves stable positioning through the epiglottic support 12, the arc-shaped groove 13, and the protrusion structure 14. Then, the insertion end 2 of the endotracheal tube can be quickly and accurately inserted into the glottis via the airway inside the supraglottic positive pressure airway, ensuring unobstructed airway flow. In this embodiment, the endotracheal tube is a novel type, including an endotracheal tube body 1 and a balloon assembly. The endotracheal tube body 1 consists of a tube body and an insertion end 2 communicating with the tube body, as shown in the specific structure below. Figure 11 , 12 As shown, the insertion end 2 is a tubular structure with a closed top, and the closed top is wedge-shaped. The wedge-shaped top, viewed from below, has an inverted V-shaped structure, conforming to the shape of the human glottis. This design allows the insertion end 2 to be inserted into the glottis more smoothly, reducing friction and pressure on the vocal cords. Figure 12 As shown, the sidewall of the intubation tube end 2 is staggered with air outlets 4 and Murphy orifices 5. The air outlets are the main openings (designed with a slope) at the front end of the endotracheal tube, directly communicating with the tracheal lumen and serving as the main channel for gas exchange. The Murphy orifices are located on the opposite side of the slope of the air outlets (or near the slope), communicating with the interior of the tube lumen, forming a dual structure of "main channel + backup channel." This avoids the risk of ventilation interruption due to blockage or adhesion to the wall of a single air outlet, improving the safety and reliability of endotracheal tube use. Furthermore, the head of the intubation tube end 2 is made of a soft material with a lower hardness than the tube body material, thereby reducing pressure and friction on the vocal cords and airway tissues. The tube body and the intubation tube end 2 can be integrally molded, or they can be sealed together by welding or bonding to form the entire endotracheal tube body 1, ensuring the device's sealing and durability. Figure 12 As shown, the wedge-shaped tip 3 of the insertion tube 2 has a shape that is narrower at the top and wider at the bottom when viewed from the front. This structure is close to the shape of the opening when the vocal cords are open, which further improves the convenience of insertion.

[0032] In actual use, the mask 6 of the supraglottic positive pressure ventilation system is first inserted into the patient's mouth, ensuring that the convex structure 14 of the mask 6 conforms to the epiglottic vallecula at the base of the tongue, and the arc-shaped groove 13 conforms to the vertebral region located on the posterior pharyngeal wall, thus ensuring the stability of the mask 6. Then, the catheter 7 is pushed to lift the epiglottic support 12 within the mask 6, achieving complete laryngoscopy. Next, the insertion end 2 of the novel endotracheal tube is inserted along the catheter 7, allowing it to pass through the glottis and enter the trachea. The wedge-shaped tip 3 of the insertion end 2 and the staggered air outlets 4 and Murphy's orifice 5 ensure smooth insertion and efficient ventilation. If gastric drainage is required, a gastric tube can be inserted into the stomach through the drainage channel 16. The location of the drainage channel outlet 17 is consistent with human anatomy, facilitating operation and use.

[0033] Through the above embodiments, the present invention achieves the following technical effects. The novel endotracheal tube, by optimizing the structure and material selection of the tube tip, reduces the risk of tissue damage during insertion while ensuring efficient ventilation. The supraglottic positive pressure airway, through innovative features such as a concave layered design, epiglottis support, arc-shaped groove, and multi-channel design, achieves excellent positioning accuracy and stability, while also possessing good ventilation and drainage functions. The endotracheal tube assembly, by integrating the advantages of the novel endotracheal tube and the supraglottic positive pressure airway, provides clinicians with a more reliable tool option, suitable for respiratory management needs in various complex scenarios.

[0034] For those skilled in the art, this invention is not limited to the details of the exemplary embodiments described above, and can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0035] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the invention. Any minor modifications, equivalent substitutions, and improvements made to the above embodiments based on the technical essence of the present invention should be included within the protection scope of the present invention.

Claims

1. A supraglottic positive airway pressure mask comprising a mask body and a conduit connected to the mask body; a recess is formed on the inner side of the mask body, and an airway is arranged in the conduit and communicates with the recess, characterized in that, The back of the cover body is provided with an arc-shaped groove starting from the center of the head of the cover body along the axial direction of the cover body, and the opening width and groove depth of the arc-shaped groove are adapted to the curvature of the spine of the back of the throat of the human body.

2. The supraglottic positive airway pressure vent of claim 1, wherein, The distal end of the cover body is provided with two spaced-apart pyriform fossa fitting portions.

3. The supraglottic positive airway pressure vent of claim 2, wherein, Two drainage channels are respectively arranged in the two pyriform fossa fitting portions of the cover body, the drainage channels are arranged independently relative to the airway, and the drainage channels extend upward along the inside of the cover body into the catheter and are located on both sides of the airway.

4. The supraglottic positive airway pressure vent of claim 1 or 2 or 3, wherein, The cavity is divided into a first cavity and a second cavity from the outer periphery to the center, the second cavity is an extension of the airway in the catheter and is in communication with the airway, the size and slope of the first cavity are adapted to the anatomical structure of the throat of the human body, and the first cavity is used to elevate the second cavity and wrap the outer edge of the throat of the human body in the first cavity.

5. The supraglottic positive airway pressure vent of claim 4, wherein, The first cavity and the second cavity are smoothly connected and integrally formed to form the cavity with gradually reduced opening curvature, and the opening curvature of the first cavity has a trend of steep on both sides and gentle in the middle, so as to better adapt to the anatomical structure of the throat of the human body.

6. The supraglottic positive airway pressure vent of claim 4, wherein, An epiglottis support is arranged on the inside of the cover body close to the head of the cover body, when the cover body is inserted, the epiglottis of the throat of the human body is limited on the epiglottis support, the throat of the human body is wrapped in the first cavity, and the glottis of the human body is in direct position with the second cavity.

7. The supraglottic positive airway pressure vent of claim 4, wherein, A pair of convex point structures are designed at the joint of the head of the cover body and the lingual epiglottic valley, and the convex point structures are in contact with the lingual epiglottic valley of the human body.

8. Use of a supraglottic positive airway pressure as claimed in any one of claims 1 or 2 or 3, characterised in that, The tracheal tube is used alone for tracheal ventilation or cooperates with the tracheal tube to form a tracheal tube assembly for tracheal ventilation.

9. The use of an upper airway positive pressure vent according to claim 8, wherein, The tube end of the tracheal tube is a tubular structure with a closed top end, and the shape of the closed top end is a wedge shape, which is adapted to the shape of the glottis of the human body. The tracheal tube is used alone for tracheal ventilation or cooperates with the tracheal tube to form a tracheal tube assembly for tracheal ventilation.

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