Laryngeal mask

Abstract

This application discloses a laryngeal mask airway (LMA), relating to the field of medical device technology. The LMA includes a cuff, an air delivery tube, and an inflation tube. The air delivery tube includes a connector and an air passage, wherein the connector is used to connect to a gas delivery device; one end of the air passage is connected to the connector, and the other end is connected to the cuff; the air delivery tube has an opening, one end of the inflation tube is connected to the opening, and the other end is connected to an inflation port on the cuff; wherein, when the gas delivery device delivers gas to the patient's larynx through the air delivery tube, the gas inflates the cuff through the inflation tube, thus forming a seal between the cuff and the larynx. In this way, during the gas delivery process, the cuff is automatically inflated using gas, eliminating the need for manual operation, reducing the steps and time required by medical personnel, and improving efficiency.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a laryngeal mask. Background Technology

[0002] A laryngeal mask airway (LMA) is a medical device used for airway management, primarily to rapidly establish an artificial airway in clinical anesthesia, emergency care, and intensive care settings, maintaining a patient's airway patency while preventing aspiration. The cuffed laryngeal mask airway is a commonly used type.

[0003] Traditional air-filled laryngeal masks are inflatable. After medical staff place the mask into the patient's larynx, they manually inflate the cuff to create a seal between the inflated cuff and the patient's laryngeal structure, thereby preventing oxygen leakage into the patient's larynx.

[0004] However, this traditional laryngeal mask requires manual inflation of the cuff, and the inflation procedure affects the speed at which an artificial airway can be established. Utility Model Content

[0005] In view of this, the present application provides a laryngeal mask that eliminates the need for manual inflation, thereby saving the manual inflation process and enabling the rapid establishment of an artificial airway.

[0006] This application provides a laryngeal mask airway, including: a cuff, an air delivery tube, and an inflation tube; the air delivery tube includes a connector and an air passage, wherein the connector is used to connect to an air delivery device; one end of the air passage is connected to the connector, and the other end is connected to the cuff; the air delivery tube has an opening, one end of the inflation tube is connected to the opening, and the other end is connected to the inflation port on the cuff; wherein, when the air delivery device delivers gas to the patient's larynx through the air delivery tube, the gas inflates the cuff through the inflation tube to form a seal between the cuff and the larynx.

[0007] In one possible embodiment, the shape and structure of the inflatable bladder and the air duct are adapted to the throat.

[0008] In one possible embodiment, the inflation tube and the air delivery tube are integrated into a separate cavity, or the inflation tube is embedded within the air delivery tube.

[0009] In one possible embodiment, the opening is provided on the connector.

[0010] In one possible embodiment, the ratio between the diameter of the inflation tube and the diameter of the ventilation channel is within a preset range, which is determined based on the set inflation time and the set air pressure of the bladder.

[0011] In one possible embodiment, the laryngeal mask also includes an observation cavity embedded within the airway, or the observation cavity is formed by a separate conduit.

[0012] The observation cavity includes an observation window made of transparent material, and a groove is formed on one side of the diaphragm, with the observation window located on the groove side of the diaphragm.

[0013] In one possible embodiment, the laryngeal mask also includes a camera and a viewing device;

[0014] The camera is installed in conjunction with the observation cavity, and the camera is connected to the visual device, with the connecting line between the two arranged inside the observation cavity.

[0015] In one possible embodiment, the laryngeal mask also includes a cleaning tube; one port of the cleaning tube is disposed in a recess and is fitted with an observation window to clean the observation window; the other port of the cleaning tube is connected to a cleaning connector, wherein the cleaning connector is used to connect an inlet cleaning fluid.

[0016] In one possible embodiment, the cleaning tube is nested inside the air duct, or it is integrated with the air duct into a separate cavity.

[0017] In one possible embodiment, the laryngeal mask also includes a drainage tube; one port of the drainage tube is disposed in a recess, and another port is used to connect to a gastric tube; the other port of the drainage tube is fixed to the non-inserted end of the airway tube.

[0018] In one possible embodiment, the drainage tube is nested inside the air duct, or it is integrated with the air duct and has a separate cavity.

[0019] The beneficial effects of this application are as follows:

[0020] The laryngeal mask provided in this application embodiment utilizes an inflation tube connected to an air delivery tube to automatically inflate the mask during air delivery. Compared with traditional manual inflation methods, this technical solution has the following advantages:

[0021] (1) Automatic inflation simplifies the operation process. Traditional manual inflation laryngeal masks require medical staff to manually inflate them after insertion, which is cumbersome and prone to poor sealing due to insufficient or excessive inflation. In contrast, the laryngeal mask of this application inflates automatically during the air delivery process without manual operation, reducing the operation steps and time for medical staff and improving efficiency.

[0022] (2) Better sealing effect. Traditional laryngeal masks may have insufficient inflation pressure or misleading indicator cuffs when manually inflated, resulting in incomplete sealing. The laryngeal mask in this application is directly inflated by an air delivery device, which can more accurately control the inflation pressure, ensure a good seal between the mask and the larynx, and reduce the risk of air leakage.

[0023] (3) Improve the safety of airway management. The automatic inflation mechanism in this application reduces airway sealing problems caused by inaccurate manual inflation, and reduces the risk of reflux and aspiration, which is especially suitable for anesthesia and emergency scenarios.

[0024] Other features and advantages of this application will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0026] Figure 1 This is one of the structural schematic diagrams of a laryngeal mask according to an embodiment of this application;

[0027] Figure 2 This is a cross-sectional schematic diagram of a ventilation duct and an inflation tube in an embodiment of this application;

[0028] Figure 3 This is a schematic diagram of the structure of a display device according to an embodiment of this application;

[0029] Figure 4 This is a second schematic diagram of the structure of a laryngeal mask according to an embodiment of this application;

[0030] Figure 5 This is the third schematic diagram of the structure of a laryngeal mask in the embodiments of this application;

[0031] Figure 6 This is the fourth schematic diagram of the structure of a laryngeal mask in the embodiments of this application.

[0032] 101; 102; 103; 301; 301; 401; 402; 403; 404; 405; 501; 1011; 1021; 1022; 5011; 5012; 601; 6011; 6012; 6012; 6013; 6014; 6015; 6016; 6012. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application 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 this application, and not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than that shown here.

[0034] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that the embodiments of the present invention described herein can be implemented in sequences other than those illustrated or described herein.

[0035] A laryngeal mask airway (LMA) is a medical device used for airway management, primarily to rapidly establish an artificial airway in clinical anesthesia, emergency care, and intensive care settings, maintaining a patient's airway patency while preventing aspiration. The cuffed LMA is a commonly used type. Traditional cuffed LMAs are inflatable; healthcare professionals manually inflate the cuff after placing the LMA in the patient's larynx to create a seal between the inflated cuff and the laryngeal structure, preventing oxygen leakage. However, this traditional LMA requires manual inflating of the cuff, and this manual inflating procedure can affect the speed of artificial airway establishment.

[0036] In view of this, such as Figure 1 As shown in the figure, this application provides a laryngeal mask, including: a mask 101, an air delivery tube 102, and an inflation tube 103; the air delivery tube 102 includes a connector 1021 and an air passage 1022, wherein the connector 1021 is used to connect to an air delivery device; one end of the air passage 1022 is connected to the connector 1021, and the other end is connected to the mask 101; one side of the mask 101 is concave to form a groove 1011, and the groove 1011 is connected to one end of the air passage 1022; the air delivery tube 102 is provided with an opening, one end of the inflation tube 103 is connected to the opening, and the other end of the inflation tube 103 is connected to the inflation port on the mask; wherein, when the air delivery device delivers gas to the patient's larynx through the air delivery tube 102, the gas inflates the mask 101 through the inflation tube 103 to form a seal between the mask 101 and the larynx.

[0037] In this embodiment, the inflation tube 103 and the air delivery tube 102 are separately configured, and a protective tube body is provided on the outside of the air delivery tube 102. The shape and structure of the inflated mask 101 and the air delivery tube 102 are adapted to the shape and structure of the larynx. Before the laryngeal mask is inserted into the human body, the mask is manually deflated by suctioning air, and then the laryngeal mask is inserted into the airway. When oxygen is delivered to the patient's larynx by gas delivery equipment such as an oxygen concentrator or an air-temperature vaporizer through the air delivery tube 102, the delivered oxygen is diverted to the mask 101 through the inflation tube 103. Alternatively, a diversion switch can be used to allow the delivered oxygen to flow preferentially to the mask 101, forming a gas communication channel between the bag, the inflation tube, and the air delivery tube, thereby inflating the mask 101. The shape and structure of the inflated mask are adapted to the shape and structure of the patient's larynx, thus fitting tightly against the larynx and quickly establishing an artificial airway.

[0038] Optionally, the interface of the inflation tube 103 on the air guide tube 102 is located on the connector 1021 of the air guide tube 102.

[0039] In one embodiment, the inflation tube 103 and the air guide tube 102 are integrated into a separate cavity, such as... Figure 2 The image shows a cross-sectional view of the arrangement of the inflation tube 103 and the ventilation channel 1022. Figure 2 In the diagram, the large circular orifice represents the cross-section of the airway 1022, and the small circular orifice represents the cross-section of the inflation tube 103. Compared to a separate tube design, this integrated, multi-chamber configuration allows for a more compact overall structure of the laryngeal mask, reducing operational steps and time. Furthermore, this method better adapts to the anatomical structure of the larynx, ensuring a tighter fit between the laryngeal mask and the larynx, thereby improving sealing.

[0040] In one embodiment, the inflation tube 103 is embedded within the air delivery tube 102. This reduces the overall size and complexity of the laryngeal mask airway, making insertion and operation easier. Simultaneously, this design avoids the tube entanglement or misoperation problems that can occur with traditional laryngeal masks where the inflation and air delivery tubes are separate. Furthermore, the embedded design reduces the exposed portion of the inflation tube, lowering the risk of it being bitten by the patient's teeth or clamped by a tracheal fixator, thus preventing ventilation failure due to tube blockage or accidental displacement. This design is suitable for patients requiring long-term laryngeal mask airway placement and significantly reduces the incidence of related complications.

[0041] In one embodiment, the ratio between the diameter of the inflation tube 103 and the diameter of the airway 1022 is within a preset range, determined based on a set inflation time and a set pressure of the cuff. The inflation time determines the rate at which gas flows from the inflation tube 103 into the cuff 101. If the inflation time is too long, it may affect the rapid inflation of the laryngeal mask; if it is too short, it may place excessive demands on the flow rate and pressure of the inflation tube 103. Furthermore, the cuff 101 needs to remain sealed at a set pressure while avoiding compression of the pharyngeal tissue; the set pressure is typically determined based on clinical needs and safety. In practical designs, the tube diameter ratio can be adjusted through simulation and experimentation to ensure that the inflation tube can rapidly and stably inflate the cuff at the set inflation time and pressure.

[0042] In one embodiment, such as Figure 3 As shown, the laryngeal mask airway also includes an observation cavity 301, which is embedded within the airway tube 102. The observation window of the observation cavity 301 is made of a transparent material, typically selected from materials with high transparency, good biocompatibility, and mechanical strength, such as polycarbonate or acrylic resin. Furthermore, the observation window 301 is located on the recessed side of the mask airway 101, allowing medical personnel to directly observe the condition of the larynx, facilitating precise positioning and adjustment during mask airway insertion. This layout also reduces interference with pharyngeal tissues, improving comfort and safety. Through the observation window 301, images of the larynx can be recorded using endoscopes or other imaging devices, facilitating subsequent analysis and diagnosis. Additionally, through the observation window 301, medical personnel can promptly detect abnormalities in the larynx, such as edema or bleeding, allowing for appropriate intervention and reducing postoperative complications.

[0043] Optionally, the observation cavity 301 may be constructed from a separate catheter.

[0044] In one embodiment, the surface of the observation window 301 is provided with an anti-fogging layer to prevent fogging caused by temperature changes or humidity during use, ensuring a clear field of vision. The size and shape of the observation window 301 are designed according to actual needs, to meet observation requirements while minimizing the impact on the overall structure of the laryngeal mask.

[0045] In one embodiment, such as Figure 4The diagram shows a schematic of a display device that can be used in conjunction with a laryngeal mask airway (LMA). The display device includes a camera 401 and a viewing device 402. The camera 401 is installed near the observation cavity 301 and works with a transparent observation window to capture real-time image data of the larynx. The camera 401 is connected to the viewing device 402, with the connecting line between them arranged within the observation cavity 301. The internal structure of the observation cavity 403 is optimized to effectively reduce signal interference and ensure the clarity and stability of image transmission. The viewing device 402 can transmit the images captured by the camera 401 to an external display or mobile device in real time. Medical personnel can use these devices to visually observe the condition of the larynx and ensure accurate placement of the LMA. Furthermore, the viewing device 402 also supports image recording for postoperative analysis and teaching.

[0046] In one embodiment, the observation chamber 301 is composed of a conduit provided separately from the air duct.

[0047] In one embodiment, the display device further includes an image output device 403, and the visual device 402 is also connected to the image output device 403 via an adapter cable 404, through which the condition of the throat can be displayed intuitively.

[0048] In one embodiment, such as Figure 5 As shown, the laryngeal mask also includes a cleaning tube 501; one port 5011 of the cleaning tube 501 is disposed in a groove and is installed in conjunction with the observation window 301 to clean the observation window 301; the other port 5012 of the cleaning tube 501 is connected to a cleaning connector, wherein the cleaning connector is used to connect the input cleaning fluid.

[0049] Specifically, the cleaning tube 501 is an important component of the laryngeal mask airway. One port 5011 is located within a groove in the mask bladder 101 and is installed in conjunction with the observation window 301 for cleaning the observation window 301. This ensures that the observation window remains clear during use, preventing secretions or dirt from obstructing the field of vision. Additionally, the other port 5012 of the cleaning tube 501 connects to a cleaning connector for receiving cleaning fluid, enabling immediate cleaning of the observation window. In some designs, the cleaning tube 501 can also be connected to a recycling system to recover and treat the used cleaning fluid, preventing contamination.

[0050] In addition, the material selection for the cleaning tube 501 must meet the requirements of biocompatibility and durability to ensure that it maintains its performance during frequent use and cleaning. For example, corrosion-resistant and abrasion-resistant medical-grade materials can be used to extend its service life.

[0051] In one embodiment, reference Figure 5The cleaning tube 501 is nested inside the air duct 102.

[0052] In one embodiment, the cleaning tube 501 and the air duct 102 are integrated into a single cavity.

[0053] In one embodiment, such as Figure 6 As shown, the laryngeal mask airway also includes a drainage tube; one port 6011 of the drainage tube 601 is disposed in a groove for connecting to the gastric tube; the other port 6012 of the drainage tube 601 is fixed to the non-inserted end of the airway tube 102. This fixing method is an assembly-type fixation, which is detachable for easy cleaning; alternatively, it can be integrally molded, and no specific limitation is made here. The drainage tube port 601, by connecting to the gastric tube, can effectively drain gas and liquid from the gastrointestinal tract, reducing gastrointestinal pressure and preventing reflux and aspiration of gastric contents. Preferably, an anti-reflux mechanism, such as a one-way valve or plug assembly, is provided within the drainage tube 601 to prevent drainage fluid from flowing back into the esophagus or pharynx, reducing the risk of aspiration.

[0054] In one embodiment, reference Figure 6 The drainage tube 601 is nested inside the air duct 102.

[0055] In one embodiment, the drainage tube 601 and the air duct 102 are integrated into a separate chamber.

[0056] The structural components shown in the above embodiments can be combined with each other.

[0057] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A laryngeal mask, comprising: The mask, air tube, and inflation tube; The air duct includes a connector and an air passage, wherein the connector is used to connect to the air delivery equipment; One end of the ventilation duct is connected to the connector, and the other end is connected to the diaphragm, characterized in that... The air duct has an opening, one end of the inflation tube is connected to the opening, and the other end is connected to the inflation port on the bladder. The ratio between the diameter of the inflation tube and the diameter of the ventilation channel is within a preset range, which is determined based on the set inflation time and the set air pressure of the bladder. When the gas delivery device delivers gas to the patient's larynx through the air delivery tube, the gas inflates the mask through the inflation tube to form a seal between the mask and the larynx.

2. The laryngeal mask according to claim 1, characterized in that, The shape and structure of the inflated diaphragm and the shape and structure of the air duct are adapted to the throat.

3. The laryngeal mask according to claim 1, characterized in that, The inflation tube and the air guide tube are integrated into a separate cavity, or the inflation tube is embedded in the air guide tube.

4. The laryngeal mask according to claim 1, characterized in that, The opening is provided on the connector.

5. The laryngeal mask according to claim 1, characterized in that, It also includes an observation chamber, which is embedded in the air duct, or the observation chamber is composed of a separate conduit; The observation cavity includes an observation window made of transparent material, and a groove is formed on one side of the cover, with the observation window located on the groove side of the cover.

6. The laryngeal mask according to claim 5, characterized in that, It also includes cameras and visual devices; The camera is installed in conjunction with the observation cavity, and the camera is connected to the visual device, with the connecting line between the two arranged inside the observation cavity.

7. The laryngeal mask according to claim 5, characterized in that, It also includes cleaning tubes; One end of the cleaning tube is disposed in the groove and is installed in conjunction with the observation window to clean the observation window; The other end of the cleaning tube is connected to a cleaning connector, which is used to connect the input cleaning fluid.

8. The laryngeal mask according to claim 7, characterized in that, The cleaning tube is nested inside the air guide tube, or it is integrated with the air guide tube into a separate cavity.

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