Transesophageal and transtracheal laryngeal mask

Abstract

The application discloses an esophageal and tracheal examination laryngeal mask, which comprises a laryngeal mask body, a laryngeal mask handle and a double-cavity connector which are sequentially communicated; a stomach examination outlet is arranged at the head end of the back of the laryngeal mask body; one end of the double-cavity connector is matched with the inner cavity of the laryngeal mask handle, and the other end is respectively provided with a stomach examination inlet and a ventilation inlet; a stomach examination membrane tube is connected to the stomach examination outlet in the cavity of the laryngeal mask body and is arranged freely, the stomach examination membrane tube is contained in the cavity of the laryngeal mask handle, and the other end is matched and connected with the stomach examination inlet of the double-cavity connector; the stomach examination inlet, the stomach examination membrane tube and the stomach examination outlet can contain a 10-14.5mm ball to pass through; the application can be used for anesthetized gastroscopy, TEE and tracheoscopy, and has the advantages of simple structure, safety and reliability.

Description

Technical Field

[0001] This invention relates primarily to the field of medical devices, and more particularly to a laryngeal mask airway for transesophageal and tracheal examination. Background Technology

[0002] A laryngeal mask airway is a medical device used to maintain a patient's airway patency; it belongs to the supraglottic ventilation system.

[0003] Standard examination laryngeal masks are divided into gastric laryngeal masks and endotracheal laryngeal masks. The gastric laryngeal mask is used in conjunction with gastroscopy or transesophageal echocardiography; the endotracheal laryngeal mask is used in conjunction with bronchoscopy. Both require connection to a ventilator for mechanical ventilation. Because the gastric and bronchoscopic lumens are both quite large, their combined diameter is much larger than the distance the mouth can open, therefore they are not interchangeable.

[0004] Traditional transesophageal laryngeal mask airways (LMAs) have a large examination lumen that severely obstructs the ventilation chamber, leading to high pressure during ventilation and hindering its effectiveness. Furthermore, when performing endotracheal examinations, the large examination lumen prevents the insertion of a bronchoscope through the ventilation chamber, thus hindering the patient's oxygenation at the end of the examination.

[0005] Many cardiac patients require transesophageal echocardiography before surgery to identify their condition. These patients have large circulatory fluctuations and are relatively fragile. When performing endotracheal intubation general anesthesia, sufficient analgesia and anesthetic drugs are required, which is not conducive to the patient's stability during anesthesia and rapid postoperative recovery. Laryngeal mask general anesthesia can greatly reduce the amount of anesthetic drugs used, and patients can recover quickly.

[0006] Clinically, there is a need for a laryngeal mask airway that can meet the requirements of gastroscopy, esophageal ultrasound, and bronchoscopy, and that can maintain the ventilation cross-section of the ventilation chamber to the maximum extent after the examination. Summary of the Invention

[0007] In view of the above-mentioned deficiencies of the prior art, the present invention provides a laryngeal mask for transesophageal and tracheal examination, comprising a laryngeal mask body, a laryngeal mask tube handle and a double-lumen connector connected in sequence.

[0008] The laryngeal mask is provided with a gastric examination outlet at the head end of the back; one end of the double-lumen connector is adapted to the inner cavity of the laryngeal mask tube handle, and the other end is provided with a gastric examination inlet and a ventilation connection port respectively. The gastric examination outlet is sealed and connected to a flexible gastric examination membrane tube within the laryngeal mask airway cavity. The gastric examination membrane tube is housed within the laryngeal mask airway handle cavity, and the other end of the gastric examination membrane tube is sealed and connected to the gastric examination inlet of the double-lumen connector. The gastric examination outlet, gastric examination membrane tube, and gastric examination inlet together constitute a transesophageal examination channel. The transesophageal examination channel can accommodate a sphere with an outer diameter of 10-14.5 mm. In its natural state, the gastric examination membrane tube is in a collapsed state.

[0009] Furthermore, the gastric examination inlet and the ventilation connection port of the dual-lumen connector are arranged horizontally side by side, with the ventilation connection port located to the left of the gastric examination inlet and higher than the gastric examination inlet.

[0010] Furthermore, the lower sidewall of the gastric examination outlet is shared with the dorsal sidewall of the head end of the laryngeal mask; the upper sidewall of the gastric examination outlet is contained within the cavity of the laryngeal mask.

[0011] Furthermore, the length of the gastric examination membrane tube is adapted to the shortest arc length of the gastric examination cavity within the laryngeal mask body, laryngeal mask tube handle, and gastric examination inlet.

[0012] Furthermore, the gastric examination membrane tube is integrally injection molded with the laryngeal mask body, and the wall thickness of the gastric examination membrane tube is 0.8-1.2mm.

[0013] Furthermore, a groove ring is provided around the outer wall of the gastric examination inlet; correspondingly, a reinforcing stem is provided at the free end of the gastric examination membrane tube; the free end of the gastric examination membrane tube passes through the gastric examination inlet, folds back, and the reinforcing stem folds back and is tightly wrapped and held in the groove ring.

[0014] Furthermore, the gastric examination membrane tube is housed within the cavity on the side of the laryngeal mask tube handle near the gastric examination inlet.

[0015] Furthermore, the gastric examination membrane tube is formed by extrusion or blow molding, and the wall thickness of the gastric examination membrane tube is 0.05-0.1 mm.

[0016] Furthermore, the two ends of the gastric examination membrane tube are respectively bonded to the gastric examination inlet and the gastric examination outlet.

[0017] Furthermore, when the two ends of the gastric examination membrane tube are bonded to the gastric examination inlet and the gastric examination outlet, a flexible guide post is inserted into the gastric examination membrane tube, and the flexible guide post causes the gastric examination membrane tube to be in an expanded state at the gastric examination inlet and the gastric examination outlet.

[0018] The beneficial effects of this invention are: 1. It can be used for gastroscopy, transesophageal echocardiography, and bronchoscopy; 2. During and after gastroscopy, transesophageal echocardiography, and other examinations, the ventilation chamber cross-sectional area is kept to the maximum extent, which is extremely beneficial for the patient's ventilation. 3. Reducing the use of general anesthetic drugs during transesophageal echocardiography is beneficial for patient management during anesthesia, rapid recovery, and rehabilitation; 4. After inserting a TEE or gastroscope through the esophagus, the TEE or gastroscope can play a significant role in fitting and positioning the laryngeal mask airway, resulting in better ventilation and sealing. 5. Simple structure and low cost. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the longitudinal section and a partial cross section of the present invention; Figure 2 for Figure 1 Enlarged view of a specific area; Figure 3 This is a schematic diagram of the first embodiment of the present invention (gastric examination membrane tube and laryngeal mask body are integrally injection molded); Figure 4 for Figure 3 Enlarged view of a specific area; Figure 5 This is a schematic diagram of the second embodiment of the present invention (gastric examination membrane tube is extruded separately) and an exploded view; Figure 6 This is a schematic diagram of the structure of the dual-cavity connector of the present invention; Figure 7 This is a schematic diagram of the longitudinal section and partial cross section of the present invention during transesophageal examination; Figure 8 This is a schematic diagram of the longitudinal section and a partial cross section of the present invention during bronchoscopy. Figure 9 This is a longitudinal cross-sectional schematic diagram of the gastric examination membrane tube support and bonding assembly of the present invention. In the picture, 1. Laryngeal mask body; 11. Gastric examination outlet; 12. Gastric examination membrane tube; 13. Reinforcing stem; 2. Laryngeal mask tube handle; 3. Double-lumen connector; 31. Gastric examination inlet; 32. Ventilation connection port; 4. Flexible guide column. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solutions of the present invention and to make the above-mentioned features, objectives, and advantages of the present invention clearer and easier to understand, the present invention will be further described below with reference to embodiments. These embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0021] like Figure 1 , Figure 3 and Figure 5As shown, the present invention provides a transesophageal and tracheal laryngeal mask airway (TEMA) comprising a laryngeal mask body 1, a laryngeal mask tube handle 2, and a double-lumen connector 3 connected in sequence. The laryngeal mask body 1 has a gastric examination outlet 11 at its back end; one end of the double-lumen connector 3 is fitted into the inner cavity of the laryngeal mask tube handle 2, and the other end is provided with a gastric examination inlet 31 and a ventilation connection port 32.

[0022] The gastric examination outlet 11 of the laryngeal mask airway for esophageal and tracheal examination is sealed and connected to a flexible gastric examination membrane tube 12 within the cavity of the laryngeal mask body 1. The tube body of the gastric examination membrane tube 12 is enclosed within the cavity of the laryngeal mask tube handle 2. The other end of the gastric examination membrane tube 12 is sealed and connected to the gastric examination inlet 31 of the double-lumen connector 3. The gastric examination outlet 11, the gastric examination membrane tube 12, and the gastric examination inlet 31 together constitute the esophageal examination channel. The esophageal examination membrane tube allows a sphere with an outer diameter of 10-14.5 mm to pass through the esophageal examination channel.

[0023] In its natural state, the laryngeal mask gastric examination membrane tube 12 is in a collapsed state when examined through the esophagus and trachea.

[0024] The double-lumen connector 3 of the transesophageal and tracheal laryngeal mask airway (TEMA) is injection molded from rigid medical materials, including PU and PE. The TMA body 1 and handle 2 are made of flexible medical materials, including PVC and silicone. The TMA handle 2 and body 1 have relatively high hardness, are self-molded, and can deform slightly under stress, maintaining the basic structure and shape of the laryngeal mask airway and conforming to the basic structure of the human oral cavity. The sealing sac of the TMA body 1 and the gastric examination membrane tube 12 have extremely low hardness, excellent toughness, thinnest sidewalls, and extremely high deformability, allowing for significant shape changes even with slight stress.

[0025] The gastric examination inlet 31 of the transesophageal and tracheal laryngeal mask dual-lumen connector 3, through the inner cavity of the flexible gastric examination membrane tube 12 running inside the laryngeal mask tube handle 2, is sealed and connected to the gastric examination inlet 31 on the dorsal side of the head of the laryngeal mask body 1, together forming a transesophageal examination channel. The ventilation connection port 32 of the transesophageal and tracheal laryngeal mask dual-lumen connector 3, through the inner cavity of the laryngeal mask tube handle 2 located outside the gastric examination membrane tube 12, is sealed and connected to the cavity of the laryngeal mask body 1, together forming a breathing channel. The esophageal examination channel and the breathing channel are isolated from each other. At the double-lumen connector 3, the entrances to the esophageal examination channel and the breathing channel are the gastric examination entrance 31 and the ventilation connection 32, respectively. Although they are integrally formed, they run independently and in parallel. Inside the laryngeal mask handle 2 and the laryngeal mask body 1, the esophageal examination channel, i.e., the gastric examination membrane tube 12, is freely contained within the breathing channel, i.e., inside the laryngeal mask handle 2 and the laryngeal mask body 1. At the head end of the laryngeal mask body 1, the esophageal examination channel and the breathing channel run independently and in parallel again, serving as the exits of the esophageal examination channel and the breathing channel. The exit of the esophageal examination channel, i.e., the gastric examination entrance 31, is located on the dorsal side of the head end of the laryngeal mask body 1. The exit of the breathing channel, i.e., the opening of the laryngeal mask body 1, is located on the upper side of the laryngeal mask body 1, which is adapted to the human anatomical structure where the glottis is located above the esophageal opening.

[0026] The laryngeal mask airway (LMA) for transesophageal and transtracheal examinations allows a sphere with an outer diameter of 10-14.5 mm to pass through the esophageal examination channel, and is compatible with instruments used for gastric examinations. Gastric examination instruments, such as gastroscopes and transesophageal ultrasound probes, are typically flexible cords with an outer diameter between 9.5-14 mm, allowing them to pass smoothly through the transesophageal examination channel into the patient's esophagus or further into the stomach. After transesophageal insertion of a TEE or endoscope, the larger outer diameter of the TEE or endoscope accurately aligns with the esophagus, playing a crucial role in the positioning of the LMA's cavity opening around the glottis, resulting in better ventilation and sealing.

[0027] The laryngeal mask airway (LMA) tube 12, used for transesophageal and transtracheal examinations, is soft in texture and has a thin wall, not exceeding 1 mm. In its natural state, the LMA tube 12 is collapsed during these examinations. Figure 1 and Figure 8 As shown, in non-esophageal examination states, including routine respiratory support ( Figure 1 ) and during bronchoscopy ( Figure 8 The gastric examination membrane tube 12 is in a collapsed state, enclosed within the inner lumen of the laryngeal mask tube handle 2 and the cavity of the laryngeal mask body 1. The gastric examination membrane tube 12 has the smallest external cross-sectional area, and occupies the smallest area within the inner lumen of the laryngeal mask tube handle 2 and the cavity of the laryngeal mask body 1. The inner lumen of the laryngeal mask tube handle 2 and the cavity of the laryngeal mask body 1 of the breathing channel are maximized, maximizing the ventilation cross-sectional area of ​​the breathing channel. Even when using a larger bronchoscope, sufficient ventilation cross-section of the breathing channel can be maintained, with minimal breathing resistance, which is beneficial for respiratory support and ensures ventilation safety.

[0028] like Figure 7 As shown, during transesophageal examinations, including TEE and gastroscopy, the gastric examination membrane tube 12 expands under the support of the TEE and gastroscopy endoscope chords. The wall of the gastric examination membrane tube 12 fits and wraps around the outside of the TEE and gastroscopy endoscope chords, minimizing the passage of the TEE and gastroscopy endoscope chords. This minimizes the cross-sectional area of ​​the gastric examination membrane tube 12, reducing its occupancy of the inner lumen of the laryngeal mask tube handle 2 and the cavity of the laryngeal mask body 1. The inner lumen of the laryngeal mask tube handle 2 and the cavity of the laryngeal mask body 1 are maximized, maximizing the ventilation cross-sectional area of ​​the ventilation channel and minimizing respiratory resistance. This also facilitates respiratory support and ensures ventilation safety.

[0029] After the esophageal examination is completed, the examination cable is removed, and the gastric examination membrane tube 12 returns to its collapsed state, allowing the examination to proceed again without esophageal intervention. Figure 1 The cross-sectional area of ​​the respiratory tract returns to its maximum state.

[0030] Specifically, it is used as follows: After anesthesia, the laryngeal mask airway (LMA) 1 is inserted through the mouth into the bottom of the pharyngeal cavity. The gastric examination outlet 11 of the LMA 1 corresponds to the opening of the patient's esophagus. The upper part of the LMA 1 surrounds the glottis, and the mask bag contacts the soft tissue in the oral cavity to form a ventilation seal. The ventilation connection port 32 of the LMA double-lumen connector 3 is adapted to the interface of the breathing tubing, connecting the breathing tubing to the breathing equipment to provide respiratory support to the patient.

[0031] like Figure 1 As shown, during mechanical ventilation without cableway insertion testing, under positive pressure from mechanical ventilation, the gastric examination membrane tube 12 completely collapses, resulting in the smallest external cross-sectional area and the largest ventilation cross-sectional area, which is beneficial for respiratory support; Figure 7 As shown, during mechanical ventilation through the esophagus, under the positive pressure of mechanical ventilation, the gastric examination membrane tube 12 is tightly wrapped around the examination chord. This minimizes the occupancy of the ventilation cross-sectional area while allowing the examination chord to pass through, thus facilitating respiratory support. Figure 8 As shown, during bronchoscopic examination under mechanical ventilation, a breathing adapter with a sealing ring (currently available clinical product) needs to be fitted and connected between the ventilation connection port 32 and the interface of the breathing tubing. The bronchoscope is inserted through the sealing ring to maintain ventilation tightness. During bronchoscopic examination under mechanical ventilation, the bronchoscope is located inside the laryngeal mask handle 2 and laryngeal mask body 1 outside the gastric examination membrane tube 12. Under the positive pressure of mechanical ventilation, the gastric examination membrane tube 12 is completely collapsed, with the gastric examination membrane tube 12 having the smallest external cross-sectional area and the largest ventilation cross-sectional area of ​​the breathing channel, which is also beneficial for respiratory support.

[0032] Furthermore, such as Figure 6As shown, the stomach examination inlet 31 and ventilation connection port 32 of the esophageal and tracheal examination laryngeal mask dual-lumen connector 3 are arranged horizontally side by side. The esophageal and tracheal examination laryngeal mask ventilation connection port 32 is located to the left of the stomach examination inlet 31 and is higher than the stomach examination inlet 31.

[0033] When in use, the upper part of the stomach examination inlet 31 and the ventilation connection port 32 of the laryngeal mask airway (LMA) double-lumen connector 3 are located outside the oral cavity, while the lower part is inserted into the LMA tube handle 2, corresponding to the occlusal area of ​​the upper and lower teeth. Since the patient's mouth opening is limited, if the stomach examination inlet 31 and the ventilation connection port 32 are arranged longitudinally side-by-side, it will inevitably make it difficult to insert the LMA body 1 into the oral cavity. Even if it is forced into insertion, it will cause the oral cavity to open to its maximum extent, which is detrimental to the patient. The stomach examination inlet 31 and the ventilation connection port 32 are arranged horizontally side-by-side, adapting to the oral cavity anatomy and minimizing the need for the patient's mouth opening. This not only makes it easier to insert the LMA body 1 into the oral cavity but also greatly reduces the mouth opening during anesthesia, which helps to reduce the force on the patient's temporomandibular joint.

[0034] Furthermore, the lower sidewall of the esophageal and tracheal examination laryngeal mask gastric examination outlet 11 is shared with the dorsal sidewall of the head end of the laryngeal mask body 1; the upper sidewall of the esophageal and tracheal examination laryngeal mask gastric examination outlet 11 is contained within the cavity of the laryngeal mask body 1. The esophageal and tracheal examination laryngeal mask gastric examination outlet 11 is completely contained within the inner cavity on the longitudinal section of the laryngeal mask body 1. The lower wall of the esophageal and tracheal examination laryngeal mask gastric examination outlet 11 is shared with the dorsal sidewall of the head end of the laryngeal mask body 1, forming a shallow arc-shaped groove on the lower wall of the cavity of the laryngeal mask body 1; the upper wall of the esophageal and tracheal examination laryngeal mask gastric examination outlet 11 protrudes outside the lower wall of the cavity of the laryngeal mask body 1, forming a deep arc-shaped arch bridge, which together with the arc-shaped groove on the lower wall of the cavity of the laryngeal mask body 1 constitutes a tubular inner cavity. Its lower lateral tubular wall is thicker to maintain the basic shape of the laryngeal mask, while the upper tubular wall is thinner and softer to adapt to the deformation requirements during the above applications.

[0035] Furthermore, such as Figure 1 and Figure 7-9As shown, the length of the gastric examination membrane tube 12 of the transesophageal and tracheal laryngeal mask airway (TEA) is adapted to the shortest arc length of the gastric examination cavity within the LEA body 1, LEA handle 2, and gastric examination inlet 31. It should not be too long or too short. The TEA 12 connects the gastric examination outlet 11 at the head end of the LEA body 1 and the gastric examination inlet 31 at the double-lumen connector 3, together forming the gastric examination cavity. If the gastric examination membrane tube 12 is too long, it will inevitably cause the tube to twist and bend within the cavities of the LEA body 1 and LEA handle 2, occupying more of the space within the LEA handle 2 used for ventilation, and also increasing resistance and reducing patency when inserting the cord-like examination head, which is detrimental to the use of the product. If the gastric examination membrane tube 12 is too short, it will inevitably increase the tension of the gastric examination membrane tube 12, causing the gastric examination membrane tube 12 to be in an expanded state. This will inevitably affect the collapse of the gastric examination membrane tube 12 during ventilation, which is not conducive to increasing the ventilation lumen of the laryngeal mask tube handle 2, and may even affect the insertion of the cord-shaped examination head during bronchoscopy.

[0036] Optimally, the length of the gastric examination membrane tube 12 of the laryngeal mask airway (LMA) for esophageal and tracheal examination should be slightly longer than the shortest arc length within the laryngeal mask tube handle 2 of the gastric examination outlet 11 at the head end of the LMA body 1 and the gastric examination inlet 31 of the double-lumen connector 3. A length difference of 3-5 mm is ideal. This prevents excessive folding and twisting of the LMA tube 12 within the laryngeal mask tube handle 2 and ensures that the LMA tube 12 can completely collapse under ventilation pressure during mechanical ventilation, which is most beneficial to the product's function.

[0037] like Figure 3 As shown, the laryngeal mask airway (LMA) gastric examination membrane tube 12 for esophageal and tracheal examinations is integrally injection molded with the LMA body 1. The wall thickness of the LMA gastric examination membrane tube 12 is 0.8-1.2 mm. This is the simplest process, but the integral injection molding structure of the LMA gastric examination membrane tube 12 and the LMA body 1 is relatively complex and requires high-quality materials. It is advisable to use higher-cost medical-grade silicone, which has good elasticity and is easy to demold, although the material cost is relatively high. During injection molding, while ensuring a high yield, the thinner the wall thickness of the LMA gastric examination membrane tube 12, the better. Under the constraints of the injection molding process, a wall thickness of 0.8-1 mm is optimal. In its natural state, the cross-section of the laryngeal mask gastric examination membrane tube 12 is an arc with downward curvature on both the upper and lower side walls, and the gap between the upper and lower side walls is narrow, giving it an overall crescent shape. When a gastroscope or transesophageal ultrasound probe is inserted, the gastroscope or transesophageal ultrasound probe easily pushes open the upper side wall of the laryngeal mask gastric examination membrane tube 12 and enters the esophagus through the gastric examination outlet 11 at the head end of the laryngeal mask 1.

[0038] like Figure 2 , Figure 3 and Figure 4As shown, a grooved ring or a raised ring is provided around the outer wall of the inlet 31 of the esophageal and tracheal laryngeal mask gastric examination. Correspondingly, a reinforcing stem 13 is provided at the free end of the esophageal and tracheal laryngeal mask gastric examination membrane tube 12. The free end of the esophageal and tracheal laryngeal mask gastric examination membrane tube 12 passes through the gastric examination inlet 31, folds back, and is folded back and tightly wrapped and held in the grooved ring or raised ring by the reinforcing stem 13.

[0039] If injection molding is used to integrally mold the gastric examination membrane tube 12 of the laryngeal mask for esophageal and tracheal examination with the laryngeal mask body 1, the gastric examination membrane tube 12 is made of silicone. The double-lumen connector 3 of the laryngeal mask for esophageal and tracheal examination is made of rigid PU, ABS, or PE material, with significant differences in material properties, making the sealing and bonding of the free end of the gastric examination membrane tube 12 to the gastric examination inlet 31 of the double-lumen connector 3 more complex.

[0040] The free end of the transesophageal and tracheal laryngeal mask gastric examination membrane tube 12 is equipped with a reinforcing stem 13, the size of which fits tightly against the outer wall of the gastric examination inlet 31. The free end of the transesophageal and tracheal laryngeal mask gastric examination membrane tube 12 passes through the laryngeal mask tube handle 2, and exits through the gastric examination inlet 31 at one end of the double-lumen connector 3. The free end of the gastric examination membrane tube 12 is then folded back and tightly fitted and secured to the grooved ring or raised ring, achieving a secure fixation and seal. This fixation and sealing process requires only mechanical operation, without the use of glue or light curing processes, resulting in low cost and convenient operation.

[0041] The transesophageal and tracheal laryngeal mask gastric examination membrane tube 12 is encased in the cavity of the laryngeal mask tube handle 2 near the gastric examination inlet 31. In actual implementation, the transesophageal and tracheal laryngeal mask gastric examination membrane tube 12 is freely encased in the cavity of the laryngeal mask tube handle 2, located on the central axis of the laryngeal mask body 1 on the dorsal side of the head of the laryngeal mask body 1, gradually shifting within the cavity of the laryngeal mask tube handle 2, and shifting to the side of the gastric examination inlet 31 within the double-lumen connector 3.

[0042] Furthermore, such as Figure 5 As shown, the transesophageal and tracheal laryngeal mask gastric examination membrane tube 12 is formed by extrusion or blow molding, and the wall thickness of the transesophageal and tracheal laryngeal mask gastric examination membrane tube 12 is 0.05-0.1mm. The two ends of the transesophageal and tracheal laryngeal mask gastric examination membrane tube 12 are respectively bonded to the gastric examination inlet 31 and the gastric examination outlet 11.

[0043] When the gastric examination membrane tube 12 of the laryngeal mask airway for esophageal and tracheal examinations is formed using extrusion or blow molding, the manufacturing process is completely different from injection molding. The gastric examination membrane tube 12 is manufactured separately, with no length limit. It is cut to the required length to obtain the accessory, which is then assembled between the gastric examination inlet 31 and the gastric examination outlet 11. During production, the laryngeal mask body 1 (without the gastric examination membrane tube 12), the laryngeal mask handle 2, and the double-lumen connector 3 are first sequentially sealed and connected. Then, the gastric examination membrane tube 12 is inserted into the lumen of the laryngeal mask handle 2, and the two ends of the gastric examination membrane tube 12 are sealed and bonded to the gastric examination outlet 11 of the laryngeal mask body 1 and the gastric examination inlet 31 of the double-lumen connector 3, respectively. If conditions permit, heat sealing can be used for bonding.

[0044] like Figure 9 As shown, when the two ends of the gastric examination membrane tube 12 of the esophageal and tracheal laryngeal mask airway are bonded to the gastric examination inlet 31 and the gastric examination outlet 11, a flexible guide post 4 is inserted into the gastric examination membrane tube 12. The flexible guide post 4 keeps the gastric examination membrane tube 12 in an expanded state at the gastric examination inlet 31 and the gastric examination outlet 11. With the support of the flexible guide post 4, the outer wall of the end of the gastric examination membrane tube 12 can fit tightly against the inner wall of the gastric examination inlet 31 and the gastric examination outlet 11, which facilitates adhesive bonding and fixation, while preventing the gastric examination membrane tube 12 from twisting and keeping the gastric examination membrane tube 12 unobstructed.

[0045] The laryngeal mask airway (LMA) tube 12 used for transesophageal and tracheal examinations has a thin wall and is flexible, making it difficult to bond the openings at both ends to the gastric examination inlet 31 and outlet 11. To facilitate bonding, a dedicated flexible guide post 4 is prepared. The flexible guide post 4 includes elastic support parts at both ends, which are adapted to the gastric examination inlet 31 and outlet 11 respectively, temporarily fixing the openings at both ends of the gastric examination tube 12. The middle section of the flexible guide post 4 is rod-shaped, with an outer diameter smaller than the expanded circular inner lumen of the gastric examination tube 12, and has a certain degree of elasticity, facilitating passage through the curved inner lumen of the LMA tube handle 2. The support parts at both ends of the flexible guide post 4 and the rod-shaped middle section of the flexible guide post 4 are temporarily snapped together for fixation.

[0046] The specific assembly procedure for the gastric examination membrane tube 12 is as follows: 1. Sequentially seal and assemble the laryngeal mask body 1 (without the gastric examination membrane tube 12), the laryngeal mask tube handle 2, and the double-lumen connector 3 to obtain a laryngeal mask body without the gastric examination membrane tube 12. 2. Place the gastric examination membrane tube 12 over the flexible guide post 4, and fix the end openings on both sides of the gastric examination membrane tube 12 to the support parts at both ends of the flexible guide post 4, so that the gastric examination membrane tube 12 and the flexible guide post 4 are temporarily fixed. 3. Insert the two ends of the gastric examination membrane tube 12, which is sleeved and fixed outside the flexible guide post 4, into the gastric examination inlet 31 and the gastric examination outlet 11 respectively; 4. Apply special medical adhesive to the inner walls of the gastric examination entrance 31 and the gastric examination exit 11 respectively; 5. After the medical adhesive has cured, the two ends of the gastric examination membrane tube 12 are bonded and fixed to the gastric examination inlet 31 and the gastric examination outlet 11, respectively. 6. Finally, the flexible guide post 4 is dislodged from the openings on both sides of the gastric examination membrane tube 12 to complete the assembly of the gastric examination membrane tube 12.

[0047] In summary, the present invention provides a laryngeal mask airway for esophageal and tracheal examination. A gastric examination inlet 31 is provided at the tail end of the laryngeal mask airway, and a gastric examination outlet 11 is provided at the head end of the laryngeal mask airway. A gastric examination membrane tube 12 is adapted to connect the gastric examination inlet 31 and the gastric examination outlet 11, forming a gastric examination channel that can accommodate a sphere with an outer diameter of 10-14.5 mm. By utilizing the collapsible ability of the gastric examination membrane tube 12, the cross-section of the laryngeal mask tube handle 2 outside the gastric examination membrane tube 12, i.e., the breathing channel, is maximized for ventilation.

[0048] The above embodiments are merely illustrative of the principles and effects of this patent application and are not intended to limit this patent application. Any person skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of this patent application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this patent application shall still be covered by the claims of this patent application.

Claims

1. A laryngeal mask airway for esophageal and tracheal examination, comprising a laryngeal mask body (1), a laryngeal mask tube handle (2), and a double-lumen connector (3) connected in sequence, characterized in that: The laryngeal mask body (1) has a gastric examination outlet (11) at the head end on the back; one end of the double-lumen connector (3) is adapted to the inner cavity of the laryngeal mask tube handle (2), and the other end is respectively provided with a gastric examination inlet (31) and a ventilation connection (32). The gastric examination outlet (11) is sealed and connected to a flexible gastric examination membrane tube (12) within the cavity of the laryngeal mask (1). The tube body of the gastric examination membrane tube (12) is enclosed within the cavity of the laryngeal mask handle (2). The other end of the gastric examination membrane tube (12) is sealed and connected to the gastric examination inlet (31) of the double-lumen connector (3). The gastric examination outlet (11), the gastric examination membrane tube (12), and the gastric examination inlet (31) together constitute the transesophageal examination channel. The transesophageal examination channel can accommodate a sphere with an outer diameter of 10-14.5 mm. In its natural state, the gastric examination membrane tube (12) is in a collapsed state.

2. The transesophageal and tracheal laryngeal mask airway according to claim 1, characterized in that: The gastric examination inlet (31) and the ventilation inlet (32) of the dual-lumen connector (3) are arranged horizontally side by side. The ventilation inlet (32) is located to the left of the gastric examination inlet (31) and is higher than the gastric examination inlet (31).

3. The transesophageal and tracheal laryngeal mask airway according to claim 1, characterized in that: The lower sidewall of the gastric examination outlet (11) is shared with the dorsal sidewall of the head end of the laryngeal mask (1); the upper sidewall of the gastric examination outlet (11) is contained within the cavity of the laryngeal mask (1).

4. The transesophageal and tracheal laryngeal mask airway according to claim 1, characterized in that: The length of the gastric examination membrane tube (12) is adapted to the shortest arc length of the gastric examination cavity within the laryngeal mask body (1), laryngeal mask tube handle (2), and gastric examination inlet (31).

5. The transesophageal and tracheal laryngeal mask airway according to claim 1, characterized in that: The gastric examination membrane tube (12) and the laryngeal mask body (1) are integrally injection molded, and the wall thickness of the gastric examination membrane tube (12) is 0.8-1.2mm.

6. The transesophageal and tracheal laryngeal mask airway according to claim 5, characterized in that: A grooved ring or a raised ring is provided around the outer wall of the gastric examination inlet (31); correspondingly, a reinforcing stem (13) is provided at the free end of the gastric examination membrane tube (12); the free end of the gastric examination membrane tube (12) passes through the gastric examination inlet (31), folds back, and the reinforcing stem (13) folds back and tightly fits and is held in the grooved ring or the raised ring.

7. The transesophageal and tracheal laryngeal mask airway according to claim 6, characterized in that: The gastric examination membrane tube (12) is enclosed in the cavity on the side of the laryngeal mask tube handle (2) near the gastric examination inlet (31).

8. The transesophageal and tracheal laryngeal mask airway according to claim 1, characterized in that: The gastric examination membrane tube (12) is formed by extrusion or blow molding, and the wall thickness of the gastric examination membrane tube (12) is 0.05-0.1mm.

9. The transesophageal and tracheal laryngeal mask airway according to claim 8, characterized in that: The gastric examination membrane tube (12) is bonded to the gastric examination inlet (31) and the gastric examination outlet (11) at both ends, respectively.

10. The transesophageal and tracheal laryngeal mask airway according to claim 9, characterized in that: When the two ends of the gastric examination membrane tube (12) are bonded to the gastric examination inlet (31) and the gastric examination outlet (11), a flexible guide post (4) is inserted into the gastric examination membrane tube (12), and the flexible guide post (4) causes the gastric examination membrane tube (12) to be in an expanded state at the gastric examination inlet (31) and the gastric examination outlet (11).

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