Self-adjusting laryngeal mask airway

Abstract

The invention discloses a self-adjusting laryngeal mask airway which comprises a mask body, an air bag assembly, a visual guide unit and a dynamic pressure control system, the shape of the mask body is arranged to conform to the laryngeal structure of the human body, the air bag assembly is arranged at the far end of the mask body, the visual guide unit is arranged at the far end of the mask body, and the dynamic pressure control system is arranged on the visual guide unit. The dynamic pressure control system is connected with the air bag assembly and used for providing video images of the throat in the implantation process, the dynamic pressure control system is connected with the air bag assembly and used for monitoring and adjusting the pressure of the air bag assembly in real time, and the dynamic pressure control system comprises a pressure sensor, an air pump, an electromagnetic valve and a control unit; the control unit is electrically connected with the pressure sensor, the air pump and the electromagnetic valve, and the control unit is used for receiving signals of the pressure sensor and controlling the air pump and the electromagnetic valve to adjust the pressure of the air bag assembly. According to the self-adjusting laryngeal mask airway, automatic adjustment and visual guiding are achieved, and the implantation success rate and safety are improved.

Description

Technical Field

[0001] This invention relates to the field of laryngeal mask airway technology for medical devices, and more particularly to a self-adjusting laryngeal mask airway. Background Technology

[0002] A laryngeal mask airway (LMA) is a ventilation device placed in the laryngopharynx, surrounding the glottic region. After the LMA is inserted into the patient's pharynx, the cuff inflates, forming a seal with the pharyngeal structures, thus establishing a ventilation tube.

[0003] However, existing laryngeal masks have the following main drawbacks:

[0004] Fixed-pressure cuff issues: Cuffs are typically pre-inflated with a fixed volume of gas. Due to individual differences in the pharyngeal anatomy among patients, a fixed-volume cuff cannot achieve a perfect fit. Insufficient pressure can lead to poor sealing, causing gas leakage and inadequate ventilation; excessive pressure can compress surrounding tissues (such as the hypoglossal nerve and the base of the tongue), resulting in postoperative complications such as sore throat, hoarseness, and numbness.

[0005] Problems with blind balloon insertion: The insertion process relies heavily on the doctor's touch and experience, and there is a certain failure rate. Insertion that is too deep, too shallow, or balloon torsion can all lead to ventilation failure or poor sealing, requiring re-insertion, prolonging the operation time and increasing patient risk. Summary of the Invention

[0006] The purpose of this invention is to provide a self-adjusting laryngeal mask airway that achieves automatic adjustment and visual guidance, thereby improving the success rate and safety of insertion.

[0007] The objective of this invention is achieved through the following technical solution:

[0008] A self-adjusting laryngeal mask airway, comprising:

[0009] A cover, the shape of which is designed to conform to the structure of the human throat;

[0010] An airbag assembly, wherein the airbag assembly is disposed at the distal end of the cover;

[0011] A visualization guidance unit, located at the far end of the cover, is used to provide video images of the throat during insertion;

[0012] A dynamic pressure control system, connected to the airbag assembly, is used to monitor and adjust the pressure of the airbag assembly in real time. The dynamic pressure control system includes:

[0013] A pressure sensor, which is disposed on the airbag assembly, is used to detect the internal pressure of the airbag assembly;

[0014] a gas pump and a solenoid valve connected with the airbag assembly through a gas flow pipeline, forming a closed loop air pressure regulating circuit;

[0015] a control unit electrically connected with the pressure sensor, the gas pump and the solenoid valve, the control unit being configured to receive the signal of the pressure sensor and control the gas pump and the solenoid valve to regulate the pressure of the airbag assembly.

[0016] In one embodiment, the airbag assembly of the self-regulating laryngeal mask airway comprises a main airbag and at least one auxiliary airbag.

[0017] The mask body comprises a tube body and a joint component, the tube body is provided with a ventilation guide tube, a camera guide tube and a drainage guide tube, the joint component is provided with a plurality of openings, the plurality of openings correspond to the ventilation guide tube, the camera guide tube and the drainage guide tube respectively, the main airbag is arranged outside the air outlet of the ventilation guide tube, the visualization guiding unit is arranged at the end of the camera guide tube close to the main airbag, and the auxiliary airbag is arranged at the side end of the esophageal opening of the drainage guide tube.

[0018] In one embodiment, the self-regulating laryngeal mask airway comprises two auxiliary airbags, the two auxiliary airbags are symmetrically distributed on both sides of the midline of the back of the mask body, the esophageal end opening of the drainage guide tube is located at the midline of the back of the mask body and between the two auxiliary airbags.

[0019] In one embodiment, when the dynamic pressure control system controls the inflation of the two auxiliary airbags, the two auxiliary airbags are inflated to press and align the opening of the drainage guide tube to the upper esophageal opening.

[0020] In one embodiment, the esophageal end opening of the drainage guide tube of the self-regulating laryngeal mask airway is provided with a duckbill valve or a silicone valve.

[0021] In one embodiment, the gas flow pipeline of the self-regulating laryngeal mask airway is arranged in the mask body or outside the mask body, one end of the gas flow pipeline is connected with the airbag assembly, and the other end of the gas flow pipeline is connected with the gas pump and the solenoid valve.

[0022] In one embodiment, the control unit of the self-regulating laryngeal mask airway comprises the following execution modes:

[0023] Insertion mode: control the main airbag to maintain an initial pressure lower than the target sealing pressure;

[0024] Sealing mode: after receiving the signal of the visualization guiding unit being in place, control the gas pump to inflate the main airbag until the pressure reaches the target sealing pressure range;

[0025] Maintenance mode: continuously monitor the main cuff pressure during the operation, and stabilize it in the target sealing pressure range by fine tuning.

[0026] In one embodiment, the visualization guiding unit of the self-adjusting laryngeal mask airway comprises:

[0027] a camera, which is arranged at the end of the camera guide tube away from the joint component and towards the patient's glottis position;

[0028] an illumination light source, which comprises a plurality of LED lights arranged around the camera;

[0029] a data line arranged in the camera guide tube, which connects the camera and the illumination light source, and is used to transmit video signals to an external display device.

[0030] In one embodiment, the self-adjusting laryngeal mask airway further comprises a handheld controller, which is integrally provided with:

[0031] a display screen for displaying video images from the visualization guiding unit and pressure data from the dynamic pressure control system;

[0032] an input interface for setting target pressure parameters and performing operation control;

[0033] a power supply for powering the laryngeal mask.

[0034] In one embodiment, the handheld controller of the self-adjusting laryngeal mask airway is communicatively connected to the dynamic pressure control system and the visualization guiding unit through wired or wireless means.

[0035] Compared with the prior art, the self-adjusting laryngeal mask airway has at least the following beneficial effects:

[0036] The self-adjusting laryngeal mask airway provided by the present application can monitor and automatically adjust the cuff pressure in real time through the dynamic pressure control system, so that the pressure is always maintained within the optimal sealing pressure range, which not only ensures effective sealing, but also avoids mucosal damage and postoperative complications caused by excessively high pressure. In addition, the visualization guiding unit provides a clear view of the larynx for the operator, making the placement process from "blind exploration" to "visible", which helps to quickly and accurately place the laryngeal mask in place, especially for difficult airways. The self-adjusting laryngeal mask airway can monitor the pressure of the cuff assembly in real time, automatically adjust to the optimal sealing pressure, and provide visualization guidance, further improving the success rate and safety of laryngeal mask placement.

[0037] The self-adjusting laryngeal mask airway also realizes that the opening of the drainage catheter is pressed to the upper esophageal opening and is aligned with the upper esophageal opening through the cooperation of the auxiliary air bag and the drainage catheter, so that the success rate of gastric tube placement and the drainage effect are improved, and the risk of regurgitation and aspiration is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 is a schematic diagram of a self-adjusting laryngeal mask airway according to an embodiment of the present application.

[0039] In the figure: 1, mask body; 11, tube body; 12, joint part; 13, ventilation catheter; 14, camera catheter; 15, drainage catheter; 151, duckbill one-way valve; 21, main air bag; 22, auxiliary air bag; 31, camera; 32, illumination light source; 33, data line; 4, handheld controller; 5, display device; 61, pressure sensor; 62, air flow pipe; 63, electromagnetic valve. DETAILED DESCRIPTION

[0040] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments, however, can be implemented in many different forms and should not be construed as limited to the implementations set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the inventive concept of example embodiments to those skilled in the art. Like reference numerals refer to like elements throughout the figures, and thus description of the same will be simplified or omitted.

[0041] The expressions of position and direction described in the present application are described with reference to the drawings, but changes can be made as needed, and the changes made are included in the scope of protection of the present application.

[0042] As Figure 1 shown, the present embodiment provides a self-adjusting laryngeal mask airway, which includes a mask body 1, an air bag assembly, a dynamic pressure control system, and a visual guidance unit. The mask body 1 further includes a ventilation catheter 13, a drainage catheter 15, and a camera catheter 14.

[0043] The shape of the mask body 1 is set to conform to the structure of the human throat, and can be made of flexible materials such as medical-grade silicone, which can better fit the anatomical structure of the throat. The mask body 1 can include a tube body 11 and a joint part 12. The ventilation catheter 13, the drainage catheter 15, and the camera catheter 14 are disposed through the tube body 11, and the joint part 12 is provided with a ventilation interface, a camera interface, and a drainage interface.

[0044] The airbag assembly is arranged at the distal end of the mask body 1 (the end away from the operator). The airbag assembly can include a main airbag 21 and at least one auxiliary airbag 22. The main airbag 21 is arranged around the outer periphery of the air outlet of the ventilation conduit 13, and after the laryngeal mask is placed, the main airbag 21 is inflated to form a seal with the laryngopharynx, ensuring ventilation and fixing the position of the laryngeal mask. The auxiliary airbag 22 can be one, two or more auxiliary airbags 22, and can preferably be two, which are symmetrically arranged on both sides of the midline of the back side of the mask body 1, and the esophageal end opening of the drainage conduit 15 is located at the midline position between the two auxiliary airbags 22.

[0045] The visualization guiding unit is arranged at the distal end of the mask body 1 and close to the main airbag 21, which is used to provide real-time video images of the larynx during the placement process, and assist the operator to accurately place the laryngeal mask into the target position.

[0046] The dynamic pressure control system is connected with the airbag assembly, which is used to monitor and adjust the pressure of the airbag assembly in real time. The dynamic pressure control system can include a control unit, an air pump, an electromagnetic valve 63 and a pressure sensor 61.

[0047] Three pressure sensors 61 can be arranged, which can preferably be micro pressure sensors 61. The three pressure sensors 61 are arranged on the main airbag 21 and the two auxiliary airbags 22 respectively, which are used to detect the internal pressure of the main airbag 21 and the two auxiliary airbags 22.

[0048] The air pump and the electromagnetic valve 63 are connected with the main airbag 21 and the auxiliary airbag 22 through the air flow pipe 62, forming a closed loop air pressure adjustment circuit. The air pump is used for inflation, and the electromagnetic valve 63 is used for exhaust or pressure maintenance. The air flow pipe 62 can be integrated in the pipe wall of the mask body 1. The air pump can preferably be a micro air pump, and the electromagnetic valve 63 can preferably be a micro electromagnetic valve 63.

[0049] The control unit is electrically connected with the pressure sensor 61, the air pump and the electromagnetic valve 63, which is used to receive the signal of the pressure sensor 61, and control the action of the air pump and the electromagnetic valve 63 based on the preset logic, so as to adjust the pressure of the main airbag 21 and the auxiliary airbag 22. The control unit receives the signal of the pressure sensor 61, controls the switch of the air pump and the electromagnetic valve 63, and realizes the accurate control of the pressure of the main airbag 21 and the auxiliary airbag 22. The control unit can be integrated in the handheld controller 4 or as a separate module.

[0050] Working process:

[0051] Preparation and placement: the operator holds the laryngeal mask, and according to the video image provided by the visualization guiding unit, places the laryngeal mask along the oral cavity and pharynx, until the screen displays that the distal end of the laryngeal mask is located in the laryngopharynx, the main airbag 21 is located at the upper esophageal sphincter, and the air outlet of the ventilation conduit 13 is aligned with the glottis.

[0052] Sealing and fixing: the control unit starts the air pump to inflate the main balloon 21 of the balloon assembly, and the pressure sensor 61 feeds back the pressure value in real time until the pressure reaches the preset target sealing pressure range. At the same time, the auxiliary balloon 22 can be inflated as needed to expand and press the opening of the drainage catheter 15 towards the esophageal wound, facilitating subsequent gastric tube insertion and effective drainage.

[0053] Intraoperative maintenance: the pressure of the main balloon 21 is continuously monitored. If the pressure drops due to deepening of anesthesia or change of body position, the control unit will instruct the air pump to supplement a small amount of air; if the pressure is too high, the electromagnetic valve 63 will be opened briefly to exhaust, so that the pressure is always stable within the target range.

[0054] Postoperative removal: the control unit controls the electromagnetic valve 63 to open, completely expelling the gas in the main balloon 21 and the auxiliary balloon 22 of the balloon assembly, and then gently removing the laryngeal mask.

[0055] In the above structure, by setting a dynamic pressure control system to monitor and automatically adjust the balloon pressure in real time, the pressure is always maintained within the optimal sealing pressure range, which not only ensures effective sealing, but also avoids mucosal damage and postoperative complications caused by excessive pressure. By setting a visual guidance unit, a clear laryngeal view is provided for the operator, making the placement process from "blind exploration" to "visible", which helps to quickly and accurately place the laryngeal mask in place, especially for difficult airways. The self-adjusting laryngeal mask airway can monitor the pressure of the balloon assembly in real time, automatically adjust to the optimal sealing pressure, and provide visual guidance, further improving the success rate and safety of laryngeal mask placement.

[0056] As shown in Figure 1 In one embodiment, the mask body 1 includes a tube body 11 and a joint component 12, the tube body 11 is provided with a ventilation catheter 13, a camera catheter 14 and a drainage catheter 15, the joint component 12 is provided with a plurality of openings, and the plurality of openings correspond one-to-one with the ventilation catheter 13, the camera catheter 14 and the drainage catheter 15, respectively, for connecting the ventilation pipeline, the camera equipment and the data line 33, and the drainage device. The main balloon 21 is arranged outside the air outlet of the ventilation catheter 13 to form a main airway seal. The visual guidance unit is arranged at the end of the camera catheter 14 close to the main balloon 21, and the auxiliary balloon 22 is arranged at the side end of the esophageal opening of the drainage catheter 15 to assist in adjusting the position of the opening of the drainage catheter 15.

[0057] As shown in Figure 1As shown, in one of the embodiments, the self-adjusting laryngeal mask airway has two auxiliary airbags 22, which are symmetrically distributed on both sides of the midline of the back of the mask body 1. The esophageal end opening of the drainage catheter 15 is located at the midline of the back of the mask body 1 and between the two auxiliary airbags 22. When the dynamic pressure control system controls the inflation of the two auxiliary airbags 22, the expansion of the two auxiliary airbags 22 can press and align the opening of the drainage catheter 15 to the upper esophageal opening, thereby improving the success rate of gastric tube placement and drainage effect and reducing the risk of regurgitation and aspiration.

[0058] As shown, Figure 1 Further, as shown, the esophageal end opening of the drainage catheter 15 of the self-adjusting laryngeal mask airway is provided with a duckbill one-way valve 151 or a silicone valve. This arrangement can effectively prevent gastric contents from flowing back.

[0059] As shown, Figure 1 In one of the embodiments, the airflow duct 62 of the self-adjusting laryngeal mask airway is arranged inside the mask body 1 (integrated into the wall of the mask body 1) or outside the mask body 1. One end of the airflow duct 62 is connected to the airbag assembly (main airbag 21 and / or auxiliary airbag 22), and the other end of the airflow duct 62 is connected to the air pump and electromagnetic valve 63. It is preferable to integrate the airflow duct 62 into the wall of the mask body 1 to avoid problems such as entanglement and accidental falling of the pipeline, and to ensure the stability of the operation of the dynamic pressure control system and the convenience of operation.

[0060] As shown, Figure 1 In one of the embodiments, the control unit of the self-adjusting laryngeal mask airway includes the following execution modes:

[0061] Placement mode: control the main airbag 21 to maintain an initial pressure lower than the target sealing pressure, facilitate smooth placement of the laryngeal mask, and reduce irritation to the throat tissue.

[0062] Sealing mode: after receiving the in-place signal automatically judged by the visual guidance unit image analysis or confirmed by the operator holding the controller 4, control the air pump to inflate the main airbag 21 until the pressure reaches the target sealing pressure range.

[0063] Maintenance mode: continuously monitor the pressure of the main airbag 21 during the operation. Due to factors such as depth of anesthesia and patient position, the pressure may change. The control unit will adjust the air pump and electromagnetic valve 63 to stabilize the airbag pressure within the target sealing pressure range.

[0064] This arrangement realizes pressure control at different stages of the laryngeal mask through the setting of three modes, realizes automatic adjustment of the laryngeal mask, and improves the safety and comfort of the laryngeal mask.

[0065] As shown, Figure 1As shown, in one embodiment, the visualization guidance unit for the self-adjusting laryngeal mask airway includes a camera 31, an illumination source 32, and a data cable 33.

[0066] The camera 31 is preferably a miniature camera 31. The camera 31 is located at the end of the camera tube 14 away from the connector component 12 (i.e., the far end of the cover 1) and facing the patient's glottis, to capture video images.

[0067] The lighting source 32 includes a plurality of LED lights arranged around the camera 31 to provide sufficient illumination for the camera 31.

[0068] The data cable 33 is installed inside the camera conduit 14. The data cable 33 connects the camera 31 and the lighting source 32 and is used to transmit video signals to the external display device 5 and control system.

[0069] The aforementioned built-in camera 31 and light source provide the operator with a clear view of the larynx, transforming the insertion process from "blind probing" to "visual," which helps to quickly and accurately place the laryngeal mask in place, especially suitable for difficult airways.

[0070] like Figure 1 As shown, in one embodiment, the self-adjusting laryngeal mask airway further includes a handheld controller 4, which integrates a display screen, an input interface, and a power supply.

[0071] The display screen is used to display video images from the visualization guidance unit and pressure data from the dynamic pressure control system, such as real-time pressure values ​​and target pressure values.

[0072] The input interface is used to set target pressure parameters and perform operational controls. The input interface can be a touchscreen or physical buttons, used for setting target pressure parameters, switching execution modes, and performing operations such as image capture or video recording.

[0073] The power supply is used to power the electrical components on the laryngeal mask, such as camera 31, LED lights, control unit, air pump, etc.

[0074] like Figure 1 As shown, the handheld controller 4 of the self-adjusting laryngeal mask airway is further connected to the dynamic pressure control system and the visual guidance unit via wired (e.g., data cable 33) or wireless (e.g., Bluetooth, Wi-Fi, etc.) means.

[0075] The aforementioned handheld controller integrates display, control, and power supply into one unit, making it simple and intuitive to operate and improving the overall system integration and user experience.

[0076] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the invention without departing from the principles and spirit of the invention, and all such changes should fall within the protection scope of the claims of the present invention.

Claims

1. A self-adjusting laryngeal mask airway, characterized in that, include: A cover (1) is shaped to conform to the structure of the human throat. An airbag assembly is disposed at the far end of the cover (1); A visualization guidance unit is disposed at the far end of the cover (1) and is used to provide video images of the throat during insertion. A dynamic pressure control system, connected to the airbag assembly, is used to monitor and adjust the pressure of the airbag assembly in real time. The dynamic pressure control system includes: A pressure sensor (61) is disposed on the airbag assembly for detecting the internal pressure of the airbag assembly; An air pump and a solenoid valve (63) are connected to the airbag assembly through an airflow pipe (62) to form a closed-loop air pressure regulation circuit; The control unit is electrically connected to the pressure sensor (61), the air pump and the solenoid valve (63). The control unit is used to receive the signal from the pressure sensor (61) and control the air pump and the solenoid valve (63) to adjust the pressure of the airbag assembly.

2. The self-adjusting laryngeal mask airway as described in claim 1, characterized in that, The airbag assembly includes a main airbag (21) and at least one secondary airbag (22); The cover (1) includes a tube (11) and a connector (12). A ventilation tube (13), a camera tube (14) and a drainage tube (15) are installed inside the tube (11). The connector (12) has multiple openings, which correspond one-to-one with the ventilation tube (13), the camera tube (14) and the drainage tube (15). The main airbag (21) is arranged around the outside of the air outlet of the ventilation tube (13). The visualization guidance unit is located at one end of the camera tube (14) near the main airbag (21). The auxiliary airbag (22) is located at the side end of the drainage tube (15) at the esophageal opening.

3. The self-adjusting laryngeal mask airway as described in claim 2, characterized in that, The number of auxiliary airbags (22) is two. The two auxiliary airbags (22) are symmetrically distributed on both sides of the midline on the back side of the cover (1). The esophageal end opening of the drainage tube (15) is located at the midline on the back side of the cover (1) and is between the two auxiliary airbags (22).

4. The self-adjusting laryngeal mask airway as described in claim 3, characterized in that, When the dynamic pressure control system controls the inflation of the two auxiliary air bladders (22), the two auxiliary air bladders (22) expand to press the opening of the drainage tube (15) toward and align it with the upper opening of the esophagus.

5. The self-adjusting laryngeal mask airway as described in claim 3, characterized in that, The esophageal end opening of the drainage catheter (15) is provided with a duckbill-shaped one-way valve (151) or a silicone valve.

6. The self-adjusting laryngeal mask airway as described in claim 1, characterized in that, The airflow duct (62) is located inside or outside the cover (1). One end of the airflow duct (62) is connected to the airbag assembly, and the other end of the airflow duct (62) is connected to the air pump and the solenoid valve (63).

7. The self-adjusting laryngeal mask airway as described in claim 2, characterized in that, The control unit includes the following execution modes: Insertion mode: Control the main airbag (21) to maintain an initial pressure below the target sealing pressure; Sealing mode: After receiving the placement signal of the visual guide unit, control the air pump to inflate the main airbag (21) until the pressure reaches the target sealing pressure range; Maintenance mode: The pressure of the main airbag (21) is continuously monitored during the operation and stabilized within the target sealing pressure range by fine-tuning.

8. The self-adjusting laryngeal mask airway as described in claim 2, characterized in that, The visualization guidance unit includes: Camera (31), said camera (31) is located at the end of the camera tube (14) away from the connector component (12) and facing the patient's glottis; The lighting source (32) includes a plurality of LED lights arranged around the camera (31); The data cable (33) is disposed inside the camera conduit (14) and connects the camera (31) and the lighting source (32) to transmit video signals to an external display device (5).

9. The self-adjusting laryngeal mask airway as described in claim 1, characterized in that, It also includes a handheld controller (4), which integrates: The display screen is used to display video images from the visualization guidance unit and pressure data from the dynamic pressure control system; The input interface is used to set target pressure parameters and perform operational control. Power supply, used to power the laryngeal mask.

10. The self-adjusting laryngeal mask airway as described in claim 9, characterized in that, The handheld controller (4) is connected to the dynamic pressure control system and the visualization guidance unit via wired or wireless means.

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