Oral endoscope mouthpiece with tongue depressor

Abstract

The invention relates to the technical field of medical instruments, and discloses an oral endoscope mouthpiece with a tongue depressor, the oral endoscope mouthpiece comprises a mouthpiece main body, an oxygen supply catheter, a nasal suction head and a sampling catheter, the mouthpiece main body is formed by integrally connecting a mouthpiece shell and a wing plate, the mouthpiece shell is provided with a tongue depressor assembly, the tongue depressor assembly comprises a tongue depressor detachably connected with the mouthpiece shell, and the sampling catheter is arranged on the tongue depressor assembly. The end of the tongue depressor is integrally connected with an extension part, an air supply channel is formed in the extension part, and the end of the extension part is connected with a flow choking turning plate through a flexible part. According to the oral endoscope mouthpiece with the tongue pressing function, by arranging the tongue pressing assembly, the tongue body can be effectively pressed, the situation that the tongue root falls to block the respiratory tract due to the fact that muscle tension is reduced due to anesthetic medicine is avoided, it is ensured that the airway of a patient keeps smooth, and meanwhile through mutual cooperation of an extension piece, an air supply channel, a flexible piece and a flow blocking turning plate, the flow blocking effect is good. Reflux is prevented from entering the airway, and the safety of a patient in the digestive endoscopy diagnosis and treatment process is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a transoral endoscopic mouthpiece with a tongue depressor. Background Technology

[0002] Digestive endoscopy, with its key role in the diagnosis and treatment of digestive system diseases, has become an important medical tool widely used in clinical practice. This procedure is usually performed under anesthesia. The use of anesthetic drugs can effectively suppress the body's adverse reactions to the stimuli, reduce the probability of complications, and improve patient comfort. During this process, the mouthpiece of the oral endoscope serves as an auxiliary device, playing a crucial role in maintaining airway patency and ensuring gas exchange.

[0003] The general procedure for using a mouthpiece in oral endoscopy is as follows: Before the digestive endoscopy, medical staff first place the mouthpiece in the patient's mouth and guide the patient to bite down on the mouthpiece. At the same time, the nasal suction head in the mouthpiece is in contact with the patient's nose. The sampling catheter is used to connect to the end-tidal carbon dioxide monitoring device to monitor the patient's breathing status in real time. The oxygen supply catheter is responsible for delivering oxygen to the patient to ensure the patient's oxygen supply under anesthesia.

[0004] The existing publication number CN208973797U discloses a transoral endoscopic mouthpiece for monitoring end-tidal carbon dioxide and providing oxygen, which includes a sampling catheter and an oxygen supply catheter, as well as a nasal suction head that can be connected to the patient's nose and a mouthpiece that can be connected to the patient's mouth. The nasal suction head is connected to the sampling catheter and the oxygen supply catheter, respectively, and the mouthpiece is connected to the sampling catheter. The above technical solution has the characteristics of compact structure and convenient operation, and can be applied to digestive endoscopy diagnosis and treatment under deep sedation or anesthesia.

[0005] However, in actual use, anesthetic drugs can suppress the patient's respiratory function and reduce muscle tone. Even with a mouthpiece, it is still difficult to completely avoid airway obstruction caused by the tongue falling back, which may lead to serious conditions such as airway obstruction, respiratory depression, hypoxemia, or even apnea. In addition, during gastrointestinal endoscopy, anesthetic drugs suppress the patient's swallowing and coughing reflexes. Combined with the stimulation of the throat, esophagus, and stomach during the procedure, it is very easy to cause nausea and vomiting, resulting in the reflux of oral secretions or gastric contents. Since mouthpieces for transoral endoscopy are mostly used only as simple oral support tools, they cannot effectively and promptly prevent reflux from entering the airway. Usually, medical staff can only detect and deal with reflux when it appears in the mouth. By this time, the reflux is very likely to have already entered the airway. Once the reflux enters the airway, it may cause serious complications such as aspiration pneumonia, airway obstruction, or even suffocation, which not only increases the patient's suffering and treatment costs but may also cause irreversible damage. Summary of the Invention

[0006] The purpose of this invention is to provide a transoral endoscopic mouthpiece with a tongue depressor, in order to solve the problems mentioned in the background art that existing transoral endoscopic mouthpieces are difficult to effectively prevent airway obstruction caused by tongue base drooping due to anesthesia, and are unable to timely block reflux into the airway.

[0007] The present invention provides a transoral endoscopic mouthpiece with a tongue depressor, which adopts the following technical solution:

[0008] An oral endoscope mouthpiece with a tongue depressor includes a mouthpiece body, an oxygen supply tube, a nasal suction head, and a sampling tube. The mouthpiece body is integrally formed by mouthpiece shell and wing plate. A tongue depressor assembly is provided on the mouthpiece shell. The tongue depressor assembly includes a tongue depressor plate detachably connected to the mouthpiece shell. An extension is integrally connected to the end of the tongue depressor plate. An air supply channel is opened on the extension. A flow-blocking flap is connected to the end of the extension through a flexible component. A U-shaped operating port for inserting the endoscope is opened on the flow-blocking flap. The shape of the flow-blocking flap is consistent with that of the air supply channel.

[0009] In the initial state, the tongue depressor presses on the tongue and extends to the root of the tongue. The extension is angled downward and extends to the trachea. The flow-blocking flap is horizontal and located at the throat under the action of gravity. When backflow occurs, the backflow flows towards the oral cavity and impacts the flow-blocking flap. The flow-blocking flap flips under the action of the flexible part to block the air supply channel.

[0010] It also includes a collection component disposed within the mouthpiece housing. The collection component includes an opening in the mouthpiece housing, a collection conduit connected to the opening, and a suction conduit, the collection conduit extending to the end of the mouthpiece housing inside the oral cavity.

[0011] Furthermore, the mouthpiece housing is provided with a limiting component, which includes a silicone sleeve fixed to the outside of the mouthpiece housing and airbag sleeves provided at both ends of the silicone sleeve. One end of the airbag sleeve is fixedly connected to the silicone sleeve, and the other end of the airbag sleeve is fixed with a collar, which is slidably sleeved on the outside of the mouthpiece housing. The airbag sleeve is provided with corresponding air holes for air intake, and an air supply conduit for air supply is connected through the mouthpiece housing, and the air supply conduit communicates with the air holes.

[0012] In the initial state, the silicone sleeve and the air bladder sleeve are horizontally positioned outside the mouthpiece shell. After the patient bites down on the silicone sleeve, the air delivery tube inflates the air bladder sleeve, causing it to expand and bulge, pushing the collar to slide along the mouthpiece shell and limiting the patient's teeth in front and behind.

[0013] Furthermore, the tongue depressor is integrally provided with an L-shaped connecting plate and an elastic plate. A locking block is fixed at the end of the elastic plate away from the tongue depressor. The mouthpiece housing is provided with a mating groove for the L-shaped connecting plate and the elastic plate to be inserted, and a locking groove for the locking block to be inserted.

[0014] Furthermore, a soft membrane is fixedly connected to the inner edge of the U-shaped operating port.

[0015] Furthermore, a pad is fixedly connected to the end of the air supply channel to limit the flow obstruction flap.

[0016] Furthermore, straps are symmetrically arranged on the wing plate.

[0017] Furthermore, the tongue depressor has an arc-shaped structure, with the side of the tongue depressor near the tongue being concave and the side away from the tongue being convex.

[0018] Furthermore, the oxygen supply conduit is provided with an interface, the nasal inhaler is connected to the interface through a first oxygen supply tube, a second oxygen supply tube is connected to the interface, and the second oxygen supply tube is connected to the mouthpiece shell.

[0019] Furthermore, the mouthpiece housing is provided with an oral sampling hole and a sampling channel, which are connected in a continuous manner. A telescopic tube is connected inside the sampling channel, and the telescopic tube is connected in a continuous manner to the nasal suction head, which is also connected to the sampling conduit.

[0020] Furthermore, the oxygen supply conduit is equipped with an oxygen supply connector, and the sampling conduit is equipped with a sampling connector.

[0021] The beneficial effects of this invention are:

[0022] 1. Equipped with a tongue depressor, the tongue depressor effectively suppresses the tongue, preventing it from falling back and obstructing the airway due to decreased muscle tone caused by anesthetic drugs. This ensures the patient's airway remains clear. Simultaneously, through the coordinated operation of the extension, air supply channel, flexible components, and flow-blocking flap, the flow-blocking flap remains horizontal under gravity under normal conditions. Its U-shaped operating port does not interfere with endoscopic insertion and treatment. When reflux occurs, the reflux impacts the flow-blocking flap, causing it to flip and block the air supply channel, preventing reflux from entering the airway. This effectively improves patient safety during digestive endoscopy. With the air supply channel blocked, medical staff can promptly manage reflux in the oral cavity.

[0023] 2. By setting a limiting component, when the patient bites on the silicone sleeve, the expansion of the air bladder sleeve can limit the movement of the patient's teeth, firmly fixing the mouthpiece in the patient's mouth. This prevents the mouthpiece from shifting due to the patient's unconscious oral movements or body movements during treatment. At the same time, fixing the position of the mouthpiece indirectly ensures the stability of the tongue depressor plate and extension in the tongue depressor assembly, allowing them to continuously perform their functions of depressing the tongue to prevent it from falling back and blocking reflux. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0025] Figure 2 This is a three-dimensional structural diagram of the mouthpiece body, oxygen supply tube, nasal suction head, sampling tube, tongue depressor assembly, and collection assembly of the present invention.

[0026] Figure 3 This is a three-dimensional structural diagram of the mouthpiece housing, oxygen supply tube, nasal suction head, sampling tube, tongue depressor assembly, and collection assembly of the present invention.

[0027] Figure 4 This is a three-dimensional structural diagram of the tongue depressor, extension, and air supply channel of the present invention.

[0028] Figure 5 This is a three-dimensional structural diagram of the flow-blocking flap of the present invention;

[0029] Figure 6 This is a three-dimensional structural diagram of the mouthpiece housing and the collection assembly of the present invention;

[0030] Figure 7 This is a three-dimensional cross-sectional view of the main body of the mouthpiece of the present invention;

[0031] Figure 8 For the present invention Figure 7 Enlarged schematic diagram of the structure at point A in the middle;

[0032] Figure 9 This is a side view cross-sectional diagram of the bite mouth housing, wing plate, and limiting assembly of the present invention.

[0033] Figure 10 This is a side view of the airbag sleeve mechanism of the present invention in the inflation state.

[0034] Figure 11 This is an exploded three-dimensional structural diagram of the silicone sleeve, airbag sleeve, and collar of the present invention.

[0035] In the picture:

[0036] 1. Mouthpiece body; 101. Mouthpiece shell; 102. Wing plate; 103. Strap; 104. Docking groove; 105. Slot; 2. Oxygen supply tube; 3. Nasal suction head; 4. Sampling tube; 5. Tongue depressor assembly; 501. Tongue depressor plate; 5011. L-shaped connecting plate; 5012. Elastic plate; 5013. Locking block; 502. Extension piece; 503. Air supply channel; 504. Flexible part; 505. Flow-blocking flap; 506 507. U-shaped operating port; 508. Soft membrane; 509. Pad; 6. Collection assembly; 601. Opening; 602. Collection catheter; 603. Suction catheter; 7. Limiting assembly; 701. Silicone sleeve; 702. Airbag sleeve; 703. Collar; 704. Air hole; 705. Gas delivery catheter; 8. Interface; 9. First oxygen delivery tube; 10. Second oxygen delivery tube; 11. Oral sampling hole; 12. Sampling channel; 13. Telescopic tube. Detailed Implementation

[0037] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0038] Reference Figures 1-3 This invention provides a transoral endoscopic mouthpiece with a tongue depressor, comprising a mouthpiece body 1, an oxygen supply conduit 2, a nasal suction head 3, and a sampling conduit 4. The oxygen supply conduit 2 is provided with an interface 8. The nasal suction head 3 is connected to the interface 8 through a first oxygen supply tube 9. A second oxygen supply tube 10 is connected to the interface 8. The second oxygen supply tube 10 is connected to the mouthpiece housing 101. A one-way valve is provided at one end of the second oxygen supply tube 10 near the mouthpiece housing 101 to prevent reflux from entering. The oxygen supply conduit 2 is provided with an oxygen supply connector for connecting to an external oxygen supply device to provide oxygen to the patient in real time. The oxygen supply conduit 2 supplies oxygen through the nasal suction head 3 and the second oxygen supply tube 10.

[0039] The mouthpiece housing 101 has an oral sampling hole 11 and a sampling channel 12, which are connected to each other. The oral sampling hole 11 is provided with a hydrophobic and breathable membrane to prevent backflow. The sampling channel 12 is connected with a telescopic tube 13, which is connected to the nasal suction head 3. The nasal suction head 3 is connected to the sampling catheter 4. The sampling catheter 4 is provided with a sampling connector for connecting to an external carbon dioxide monitoring device to reflect the patient's breathing status in real time and realize integrated oxygen supply monitoring.

[0040] The nasal inhaler 3 is equipped with a partition that can divide it into two airways that are not connected to each other, so that the nasal inhaler 3, the first oxygen delivery tube 9 and the oxygen supply tube 2 form an independent oxygen supply channel, and the nasal inhaler 3, the sampling tube 4 and the mouthpiece body 1 form another independent gas collection channel to prevent oxygen from mixing with carbon dioxide at the end of expiration.

[0041] The mouthpiece body 1 is formed by the mouthpiece shell 101 and the wing plate 102 being integrated. The mouthpiece shell 101 is an elliptical cylinder, and the wing plate 102 is symmetrically provided with straps 103, which make the mouthpiece body 1 fit securely.

[0042] Reference Figures 3-5 The mouthpiece housing 101 is equipped with a tongue depressor assembly 5, which includes a tongue depressor plate 501 detachably connected to the mouthpiece housing 101. The tongue depressor plate 501 has an arc-shaped structure, with the side near the tongue being concave and the side away from the tongue being convex, which can effectively suppress the tongue and prevent airway obstruction caused by the tongue falling back. The arc of the tongue depressor plate 501 decreases near the root of the tongue and the angle is slightly downward, which can suppress the root of the tongue and expose the pharynx. An extension member 502 is integrally connected to the end of the tongue depressor plate 501. An air supply channel 503 is opened on the extension member 502. The end of the extension member 502 is connected to a flow-blocking flap 505 through a flexible member 504. The flow-blocking flap 505 has a U-shaped operating port 506 for inserting an endoscope. The flow-blocking flap 505 has the same shape as the air supply channel 503. In use, medical personnel install the tongue depressor plate 501 on the mouthpiece housing 101. The patient is then guided to bite down on the mouthpiece 1. At this time, the tongue depressor 501 presses down on the tongue and extends to the base of the tongue. The tongue depressor 501 can effectively suppress the tongue, preventing the base of the tongue from falling down and blocking the airway due to the decrease in muscle tension caused by anesthetic drugs, thus ensuring that the patient's airway remains open. The extension 502 is angled downward and extends to the trachea. In the initial state, the flow-blocking flap 505 is horizontally positioned at the pharynx under the action of gravity, and the U-shaped operating port 506 on it allows for smooth insertion of the endoscope without affecting the normal progress of endoscopic diagnosis and treatment. When the patient has reflux, the reflux flows towards the oral cavity and impacts the flow-blocking flap 505. The flow-blocking flap 505 is flipped under the action of the flexible part 504 to block the air supply channel 503, preventing the reflux from being aspirated into the airway, thereby avoiding serious complications such as aspiration pneumonia, airway obstruction, or even suffocation, effectively improving the safety of patients during digestive endoscopy.

[0043] The gas supply channel 503, in conjunction with the oxygen supply tubing 2, can provide a stable oxygen supply to the patient. When the flow-blocking flap 505 is in its initial state without being impacted by backflow, oxygen can smoothly enter the patient's airway through the gas supply channel 503, meeting the patient's oxygen needs under anesthesia and maintaining the patient's normal respiratory metabolism and physiological functions. When the flow-blocking flap 505 flips to block the gas supply channel 503, although the gas supply channel 503 is temporarily blocked, oxygen can still be supplied to the patient through the first oxygen delivery tube 9 in conjunction with the nasal inhaler 3. After the impact of backflow is eliminated, the flow-blocking flap 505 can return to its initial state under the action of the flexible part 504, ensuring the timeliness and continuity of oxygen supply.

[0044] It should be noted that a soft membrane 507 is fixedly connected to the inner edge of the U-shaped operating port 506. When the endoscope is inserted into the patient's oral cavity through the U-shaped operating port 506 for diagnosis and treatment, the flexibility of the soft membrane 507 can closely fit the outer surface of the endoscope. During the operation, the movement and rotation of the endoscope will cause friction and contact with the U-shaped operating port 506. At this time, the soft membrane 507 acts as a buffer layer, which can effectively alleviate the rigid contact between the endoscope and the U-shaped operating port 506.

[0045] The end of the air supply channel 503 is fixedly connected to a pad 508 that limits the flow-blocking flap 505. When the flow-blocking flap 505 is in a horizontal state under the action of gravity, it is located above the pad 508.

[0046] Reference Figure 3 , Figures 7-8 The tongue depressor 501 is integrally equipped with an L-shaped connecting plate 5011 and an elastic plate 5012. The L-shaped connecting plate 5011 and the elastic plate 5012 are located on the side of the tongue depressor 501 near the mouthpiece housing 101. A locking block 5013 is fixed to the end of the elastic plate 5012 away from the tongue depressor 501. The mouthpiece housing 101 has a mating groove 104 for the L-shaped connecting plate 5011 and the elastic plate 5012 to be inserted into, and a locking groove 105 for the locking block 5013 to be inserted into. The mouthpiece housing 101 and the tongue depressor 501 are detachable separate structures, which can be used as a whole, and can also be used separately. When installing the tongue depressor 501, press down on the elastic plate 5012 to deform it, and align the L-shaped connecting plate 5011 and the elastic plate 5012 with the mating groove 104. Insert them along the direction of the mating groove 104. When the elastic plate 5012 is inserted into the predetermined position, the locking block 5013 aligns with the locking groove 105 on the mating groove 104 and locks into the locking groove 105, so that the tongue depressor 501 is fixed on the mouthpiece housing 101. When disassembling, apply a certain external force to the locking block 5013 to disengage it from the locking groove 105, and then the tongue depressor 501 can be removed from the mouthpiece housing 101.

[0047] Reference Figure 6It also includes a collection component 6, which is disposed inside the mouthpiece housing 101. The collection component 6 includes an opening 601 on the mouthpiece housing 101, a collection conduit 602 connected to the opening 601, and a suction conduit 603. The collection conduit 602 extends to the end of the mouthpiece housing 101 inside the oral cavity, and the suction conduit 603 extends to the outside of the wing plate 102 and is connected to an external negative pressure device. When reflux occurs in the patient's oral cavity, the external negative pressure device is activated, and the negative pressure is transmitted to the collection conduit 602 through the suction conduit 603. A suction force is formed at the opening at the end of the collection conduit 602, so that the reflux in the oral cavity is quickly and effectively sucked out of the oral cavity through the opening 601 and along the suction conduit 603 under the action of negative pressure suction, and enters the collection container matched with the negative pressure device, thereby realizing the timely collection and removal of reflux or secretions in the oral cavity.

[0048] Furthermore, refer to Figures 9-11 The mouthpiece housing 101 is provided with a limiting component 7, which includes a silicone sleeve 701 fixed to the outside of the mouthpiece housing 101 and airbag sleeves 702 disposed at both ends of the silicone sleeve 701. The end of the airbag sleeve 702 near the silicone sleeve 701 is fixedly connected to the silicone sleeve 701, and the end of the airbag sleeve 702 away from the silicone sleeve 701 is fixed with a collar 703, which slides around the mouthpiece housing 101. The airbag sleeve 702 is provided with corresponding air holes 704 for air intake. An air supply conduit 705 is connected through the mouthpiece housing 101 for air supply, and the air supply conduit 705 communicates with the air holes 704. The air supply conduit 705 extends to the outside of the wing plate 102 and is connected to the air supply conduit 705. The external air supply device is connected. In the initial state, the silicone sleeve 701 and the air bladder sleeve 702 are horizontally positioned outside the mouthpiece housing 101. When the patient bites down on the silicone sleeve 701, the external air supply device is activated. Gas enters the air bladder sleeve 702 through the air inlet 704 via the air conduit 705. As the gas is continuously filled, the air bladder sleeve 702 gradually expands and bulges due to the increased internal air pressure. The increase in its volume pushes the collar 703 to slide along the axial direction of the mouthpiece housing 101. Thus, the bulging air bladder sleeve 702 after inflation achieves the anterior and posterior positioning of the patient's teeth, firmly fixing the mouthpiece in the patient's oral cavity, thereby fixing the position of the tongue depressor 501 and the extension 502.

[0049] This invention provides a working principle for a transoral endoscopic mouthpiece with a tongue depressor: Before endoscopic examination, the elastic plate 5012 is pressed down to deform it. Then, the L-shaped connecting plate 5011 and the elastic plate 5012 are aligned with the docking groove 104 and inserted. When the locking block 5013 aligns with the locking slot 105 on the docking groove 104, it is locked into the locking slot 105, fixing the tongue depressor 501 to the mouthpiece housing 101. Then, medical personnel place the mouthpiece body 1 in the patient's mouth and guide the patient to bite down on the mouthpiece body 1. At this time, the tongue depressor 501 presses against the tongue. The extension piece 502 extends downwards to the trachea, and the flow-blocking flap 505 is horizontally positioned at the throat under gravity. The mouthpiece body 1 is securely worn by the strap 103 on the wing plate 102. The patient bites on the silicone sleeve 701, and the external air supply device is activated. Gas is injected into the air bag sleeve 702 through the air delivery tube 705 and the air hole 704, causing it to expand and push the collar 703 to slide, limiting the position of the patient's teeth and fixing the position of the mouthpiece body 1. The endoscope is inserted through the U-shaped operating port 506 to perform the examination.

[0050] During the diagnosis and treatment, the external oxygen supply equipment is connected to the oxygen supply tube 2 through the oxygen supply connector. Oxygen is supplied to the patient through the interface 8 via the first oxygen supply tube 9, the nasal inhaler 3, the second oxygen supply tube 10, and the mouthpiece shell 101. The patient's exhaled gas passes through the oral sampling hole 11, through the sampling channel 12, the telescopic tube 13, the nasal inhaler 3, and the sampling tube 4. The external carbon dioxide monitoring device connected to the sampling connector monitors the patient's breathing status in real time.

[0051] When the patient experiences reflux, the reflux impacts the flow-blocking flap 505, causing it to flip under the action of the flexible component 504, blocking the air supply channel 503 and preventing the reflux from entering the airway. At this time, oxygen can still be supplied through the nasal suction head 3. Simultaneously, the external negative pressure device is activated to suction out the reflux in the oral cavity through the suction tube 603 and the collection tube 602.

[0052] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A transoral endoscopic mouthpiece with a tongue depressor, comprising a mouthpiece body, an oxygen supply tube, a nasal suction tip, and a sampling tube, wherein the mouthpiece body is integrally formed by a mouthpiece shell and a wing plate, characterized in that: The mouthpiece housing is provided with a tongue depressor assembly, which includes a tongue depressor plate detachably connected to the mouthpiece housing. An extension is integrally connected to the end of the tongue depressor plate. An air supply channel is provided on the extension. A flow-blocking flap is connected to the end of the extension via a flexible component. A U-shaped operating port for inserting an endoscope is provided on the flow-blocking flap. The shape of the flow-blocking flap is consistent with that of the air supply channel. In the initial state, the tongue depressor presses on the tongue and extends to the root of the tongue. The extension is angled downward and extends to the trachea. The flow-blocking flap is horizontal and located at the throat under the action of gravity. When backflow occurs, the backflow flows towards the oral cavity and impacts the flow-blocking flap. The flow-blocking flap flips under the action of the flexible part to block the air supply channel. It also includes a collection component disposed within the mouthpiece housing. The collection component includes an opening in the mouthpiece housing, a collection conduit connected to the opening, and a suction conduit, the collection conduit extending to the end of the mouthpiece housing inside the oral cavity.

2. The transoral endoscopic mouthpiece with tongue depressor according to claim 1, characterized in that: The mouthpiece housing is provided with a limiting component, which includes a silicone sleeve fixed to the outside of the mouthpiece housing and airbag sleeves provided at both ends of the silicone sleeve. One end of the airbag sleeve is fixedly connected to the silicone sleeve, and the other end of the airbag sleeve is fixed with a collar. The collar is slidably sleeved on the outside of the mouthpiece housing. The airbag sleeve is provided with corresponding air holes for air intake, and an air supply conduit for air supply is connected through the mouthpiece housing. The air supply conduit communicates with the air holes. In the initial state, the silicone sleeve and the air bladder sleeve are horizontally positioned outside the mouthpiece shell. After the patient bites down on the silicone sleeve, the air delivery tube inflates the air bladder sleeve, causing it to expand and bulge, pushing the collar to slide along the mouthpiece shell and limiting the patient's teeth in front and behind.

3. The transoral endoscopic mouthpiece with tongue depressor according to claim 1, characterized in that: The tongue depressor plate is integrally provided with an L-shaped connecting plate and an elastic plate. A locking block is fixed at the end of the elastic plate away from the tongue depressor plate. The mouthpiece housing is provided with a mating groove for the L-shaped connecting plate and the elastic plate to be inserted, and a locking groove for the locking block to be inserted.

4. The transoral endoscopic mouthpiece with tongue depressor according to claim 1, characterized in that: A soft membrane is fixedly connected to the inner edge of the U-shaped operating port.

5. The transoral endoscopic mouthpiece with tongue depressor according to claim 1, characterized in that: The end of the gas supply channel is fixedly connected to a pad that limits the flow obstruction flap.

6. The transoral endoscopic mouthpiece with tongue depressor according to claim 1, characterized in that: The wing plates are symmetrically provided with straps.

7. The transoral endoscopic mouthpiece with tongue depressor according to claim 1, characterized in that: The tongue depressor has an arc-shaped structure, with the side of the tongue depressor near the tongue being concave and the side away from the tongue being convex.

8. The transoral endoscopic mouthpiece with tongue depressor according to claim 1, characterized in that: The oxygen supply tube is provided with an interface, and the nasal inhaler is connected to the interface through a first oxygen supply tube. A second oxygen supply tube is connected to the interface, and the second oxygen supply tube is connected to the mouthpiece shell.

9. The transoral endoscopic mouthpiece with tongue depressor according to claim 1, characterized in that: The mouthpiece housing has an oral sampling hole and a sampling channel, which are connected to each other. A telescopic tube is connected inside the sampling channel, and the telescopic tube is connected to the nasal suction head. The nasal suction head is also connected to the sampling conduit.

10. The transoral endoscopic mouthpiece with tongue depressor according to claim 1, characterized in that: The oxygen supply conduit is equipped with an oxygen supply connector, and the sampling conduit is equipped with a sampling connector.

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