Intelligent protection device for preventing respiratory tract obstruction after anesthesia

Abstract

The application discloses an intelligent protection device for preventing respiratory tract obstruction after anesthesia and relates to the field of medical devices, which comprises a blockage prevention mechanism and a supporting mechanism, the blockage prevention mechanism comprises a main pipeline, the rear end of the main pipeline is connected with a negative pressure pipe, the bottom of the rear end of the main pipeline is connected with a blowdown pipe, and the front end of the main pipeline is fixedly provided with a mounting head. Through the cooperation of the blockage prevention mechanism and the supporting mechanism, the application can not only effectively maintain the opening of the airway and prevent the tongue from falling backward, but also actively monitor and remove respiratory tract secretions, reduce the risk of obstruction, and the adjusting assembly in the supporting mechanism can detect the pressure of the base of the tongue in real time and adaptively adjust the supporting angle and strength, so that tissue damage is avoided; the blockage prevention mechanism is designed through negative pressure suction and an air guide cavity, air-liquid separation and continuous ventilation are realized, and the safety of patients is improved; in addition, the intelligent sensing electrode can automatically trigger the sputum suction function, reduces the intervention of medical staff, and improves the nursing efficiency.

Description

Technical Field

[0001] This invention relates to medical device technology, specifically to an intelligent protective device for preventing airway obstruction after anesthesia. Background Technology

[0002] After a patient awakens from general anesthesia and has their endotracheal tube removed, there may still be residual sedative, analgesic, muscle relaxant drugs or other metabolites in their body. Due to incomplete metabolism, the patient's body is in a state of insensitivity to hypoxia. The residual anesthetic drugs may also cause the patient to be unable to effectively control their tongue muscles, causing the tongue to fall into the throat due to gravity, which may lead to posterior displacement of the tongue, causing airway obstruction and threatening the patient's life. Therefore, protective devices are required.

[0003] However, existing devices are mainly passive protection and are mostly fixed support types (such as oropharyngeal airways and laryngeal masks), which can only maintain airway patency and cannot cope with dynamic risks such as sudden airway spasm and secretion obstruction after anesthesia. Summary of the Invention

[0004] The purpose of this invention is to provide an intelligent protective device for preventing airway obstruction after anesthesia, in order to solve the problem that existing technologies mainly rely on passive protection, and are mostly fixed support types, which can only maintain airway closure and cannot cope with dynamic risks such as sudden airway spasm and secretion obstruction after anesthesia.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an intelligent protective device for preventing airway obstruction after anesthesia, comprising an anti-blocking mechanism and a supporting mechanism. The anti-blocking mechanism includes a main pipe, a negative pressure pipe connected to the rear end of the main pipe, a drain pipe connected to the bottom of the rear end of the main pipe, and an installation head fixedly installed at the front end of the main pipe. A breathing chamber is formed inside the installation head, and a flexible pad is covered on the outer wall of the installation head. A suction port is provided on the front end face of the installation head, and multiple breathing holes are distributed on the circumferential side wall of the installation head, which communicate with the breathing chamber. The supporting mechanism includes an installation collar, an installation hole for the main pipe to pass through, and several adjustment components are provided on the side of the installation collar. The installation collar is connected to a supporting arc plate through the adjustment components, and a flexible protective pad is provided on the outer surface of the supporting arc plate. The main pipe of the anti-blocking mechanism passes through the installation hole of the supporting mechanism, so that the installation head is located in front of the supporting arc plate, together forming an integral structure that can be inserted into the patient's oral cavity and act on the tongue root and pharyngeal region.

[0006] Furthermore, the adjustment assembly includes a mounting tube, a movable rod, and a pressure sensor. One end of the mounting tube is fixedly connected to the side of the mounting collar. The movable rod is partially sleeved inside the mounting tube. The pressure sensor is located at the bottom inside the mounting tube. The end of the movable rod inside the mounting tube is connected to the pressure sensor on the bottom wall of the mounting tube via a compression spring. The movable rod can extend and retract relative to the mounting tube under the support of the compression spring. The pressure sensor is used to detect the pressure of the tongue root on the supporting arc plate.

[0007] Furthermore, the adjustment assembly further includes a rotating shaft, a side block, and a torsion spring. The rotating shaft is connected to the end of the movable rod, and the torsion spring is sleeved on the rotating shaft. The side block is fixedly disposed on the back of the supporting arc plate and is hinged to the movable rod through the rotating shaft. The two ends of the torsion spring act on the side block and the movable rod respectively to provide a restoring torque. The supporting arc plate is hinged to the movable rod through the rotating shaft and can adaptively deflect at multiple angles under the torsion of the torsion spring.

[0008] Furthermore, the anti-clogging mechanism also includes a suction chamber and an air guide chamber. The suction chamber is located inside the main pipe and communicates with the suction port and the drain pipe to collect inhaled secretions. The air guide chamber is arranged around the suction chamber, and the end of the air guide chamber near the mounting head communicates with the breathing chamber. Several connection holes are provided on the outer wall of the main pipe, and the end of the air guide chamber away from the mounting head communicates with the connection holes. The suction chamber is connected to the negative pressure pipe. The air guide chamber is used to guide airflow and maintain airway ventilation through the breathing port, while also working with the suction chamber to achieve gas-liquid separation.

[0009] Furthermore, the negative pressure pipe is configured to connect to an external negative pressure source. The external negative pressure source is connected to the suction port through the suction chamber in the main pipe to form a fluid connection, thereby generating suction at the suction port.

[0010] Furthermore, an air cavity is provided inside the mounting collar, and several through holes are provided inside the mounting hole. The positions of the through holes correspond to the connecting holes, allowing the connecting holes to pass through the through holes and enter the air cavity.

[0011] Furthermore, a filter screen is provided on the side of the air cavity away from the mounting head. The filter screen covers the outside of the air cavity, and the air cavity is connected to the outside air through the outer filter screen to assist the patient to breathe through the nose. The filter screen is used to filter impurities in the outside air and reduce irritation to the patient's airway.

[0012] Furthermore, an annular sensing electrode is embedded around the suction port at the front end of the mounting head. The annular sensing electrode is signal-connected to the control unit connected to the negative pressure tube, and is used to detect the accumulation of secretions and trigger the start and stop of negative pressure suction.

[0013] Furthermore, both the flexible pad and the flexible protective pad are made of medical-grade silicone material and are fixed to the mounting head and the supporting arc plate respectively by overmolding or bonding.

[0014] Compared with existing technologies, the intelligent protective device for preventing airway obstruction after anesthesia provided by this invention, through the synergistic action of the anti-blocking mechanism and the support mechanism, can not only effectively maintain airway patency and prevent tongue posterior displacement, but also actively monitor and clear airway secretions, reducing the risk of obstruction. Furthermore, the adjustment component in the support mechanism can detect tongue base pressure in real time and adaptively adjust the support angle and force to avoid tissue damage. The anti-blocking mechanism achieves gas-liquid separation and continuous ventilation through negative pressure suction and air delivery chamber design, improving patient safety. In addition, the intelligent sensing electrode can automatically trigger the suction function, reducing medical staff intervention and improving nursing efficiency. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the anti-blocking mechanism in this invention;

[0018] Figure 3 This is a schematic diagram of the support mechanism in this invention;

[0019] Figure 4 This is a cross-sectional view of the support mechanism in this invention;

[0020] Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle;

[0021] Figure 6 This is a cross-sectional view of the anti-blocking mechanism in this invention;

[0022] Figure 7 For the present invention Figure 6 Enlarged view of section B in the middle.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Anti-clogging mechanism; 101. Main pipe; 102. Negative pressure pipe; 103. Sewage pipe; 104. Mounting head; 1041. Breathing chamber; 1042. Flexible pad; 1043. Suction port; 1044. Breathing hole; 105. Sewage suction chamber; 106. Air guide chamber; 107. Connection hole; 2. Support mechanism; 201. Mounting collar; 202. Mounting hole; 203. Perforation; 204. Air chamber; 205. Filter screen; 206. Adjustment component; 2061. Mounting pipe; 2062. Movable rod; 2063. Compression spring; 2064. Pressure sensor; 2065. Rotating shaft; 2066. Torsion spring; 2067. Side block; 207. Support arc plate; 208. Flexible protective pad. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0026] As attached Figure 1 To be continued Figure 7 As shown:

[0027] This invention provides an intelligent protective device for preventing airway obstruction after anesthesia, comprising an anti-blocking mechanism 1 and a support mechanism 2. The anti-blocking mechanism 1 includes a main pipe 101, a negative pressure pipe 102 connected to the rear end of the main pipe 101, a drain pipe 103 connected to the bottom of the rear end of the main pipe 101, and an installation head 104 fixedly installed at the front end of the main pipe 101. A breathing chamber 1041 is formed inside the installation head 104, and a flexible pad 1042 covers the outer wall of the installation head 104. A suction port 1043 is opened on the front end face of the installation head 104, and multiple breathing holes 1044 are distributed on the circumferential sidewalls of the installation head 104. The breathing holes 1044 are connected to... The breathing chamber 1041 is connected. The support mechanism 2 includes a mounting collar 201. The mounting collar 201 has a mounting hole 202 for the main pipe 101 to pass through. Several adjustment components 206 are provided on the side of the mounting collar 201. The mounting collar 201 is connected to the support arc plate 207 through the adjustment components 206. A flexible protective pad 208 is provided on the outer side of the support arc plate 207. The main pipe 101 of the anti-blocking mechanism 1 passes through the mounting hole 202 of the support mechanism 2, so that the mounting head 104 is located in front of the support arc plate 207, together forming an integral structure that can be inserted into the patient's oral cavity and act on the tongue root and pharyngeal region.

[0028] During operation, the device is placed in the patient's mouth. The supporting arc plate 207 fits the base of the tongue under the action of the adjusting component 206 to prevent the tongue from falling back. The flexible protective pad 208 reduces irritation to the oral tissues. The mounting head 104 extends into the pharyngeal area. The breathing hole 1044 allows airflow through the breathing chamber 1041 to maintain ventilation. The suction port 1043 is used to remove secretions.

[0029] In one embodiment of the present invention, the adjustment assembly 206 includes a mounting tube 2061, a movable rod 2062, and a pressure sensor 2064. One end of the mounting tube 2061 is fixedly connected to the side of the mounting collar 201. The movable rod 2062 is partially sleeved inside the mounting tube 2061. The pressure sensor 2064 is located at the bottom end inside the mounting tube 2061. One end of the movable rod 2062 inside the mounting tube 2061 is connected to the pressure sensor 2064 on the bottom wall of the mounting tube 2061 via a compression spring 2063. The movable rod 2062 can extend and retract relative to the mounting tube 2061 under the support of the compression spring 2063. The pressure sensor 2064 is used to detect the pressure of the tongue root on the supporting arc plate 207.

[0030] During operation, when the tongue root applies pressure to the support arc plate 207, the movable rod 2062 compresses the spring 2063, the pressure sensor 2064 detects the pressure change and transmits the signal to the control unit. The control unit can adjust the negative pressure suction intensity or sound an alarm based on the pressure data to achieve intelligent monitoring.

[0031] In one embodiment of the present invention, the adjusting assembly 206 further includes a rotating shaft 2065, a side block 2067, and a torsion spring 2066. The rotating shaft 2065 is connected to the end of the movable rod 2062, and the torsion spring 2066 is sleeved on the rotating shaft 2065. The side block 2067 is fixedly disposed on the back of the supporting arc plate 207 and is hinged to the movable rod 2062 through the rotating shaft 2065. The two ends of the torsion spring 2066 act on the side block 2067 and the movable rod 2062 respectively to provide a restoring torque. The supporting arc plate 207 is hinged to the movable rod 2062 through the rotating shaft 2065 and can perform multi-angle adaptive deflection under the torsion of the torsion spring 2066.

[0032] During operation, the support arc plate 207 can deflect according to the anatomical shape of the tongue root to ensure uniform fit and avoid excessive local pressure. The torsion spring 2066 provides restoring force so that the support arc plate 207 returns to its original position after movement, maintaining stable support.

[0033] In one embodiment of the present invention, the anti-blocking mechanism 1 further includes a suction chamber 105 and an air guide chamber 106. The suction chamber 105 is located inside the main pipe 101 and is connected to the suction port 1043 and the sewage pipe 103 for collecting inhaled secretions. The air guide chamber 106 is arranged around the suction chamber 105. The end of the air guide chamber 106 near the mounting head 104 is connected to the breathing chamber 1041. Several connecting holes 107 are provided on the outer wall of the main pipe 101. The end of the air guide chamber 106 away from the mounting head 104 is connected to the connecting hole 107. The suction chamber 105 is connected to the negative pressure pipe 102. The air guide chamber 106 is used to guide airflow and maintain airway ventilation through the breathing port 1044, while working with the suction chamber 105 to achieve gas-liquid separation.

[0034] During operation, the negative pressure tube 102 is connected to an external negative pressure source, generating suction at the suction port 1043 to draw secretions into the suction chamber 105, which is then discharged from the drain tube 103. At the same time, external air enters the air delivery chamber 106 through the connection hole 107, flows through the breathing chamber 1041 and the breathing hole 1044, and provides oxygen to the patient. The separation design of the air delivery chamber 106 and the suction chamber 105 prevents secretions from blocking the airflow and ensures smooth ventilation.

[0035] In one embodiment of the present invention, the negative pressure pipe 102 is configured to connect to an external negative pressure source. The external negative pressure source is connected to the suction port 1043 via the suction chamber 105 in the main pipe 101 to form a fluid connection, so as to generate suction at the suction port 1043.

[0036] When in operation, after the negative pressure source is activated, the suction force is transmitted along the suction chamber 105 to the suction port 1043 to actively remove accumulated sputum or blood and keep the respiratory tract clean.

[0037] In one embodiment of the present invention, an air cavity 204 is provided inside the mounting collar 201, and a plurality of through holes 203 are provided inside the mounting hole 202. The positions of the through holes 203 correspond to the connecting hole 107, so that the connecting hole 107 passes through the through holes 203 and enters the air cavity 204.

[0038] During operation, the air chamber 204 is connected to the connection hole 107 through the perforation 203, and external air can enter the air guide chamber 106 through the air chamber 204 to increase the ventilation volume.

[0039] In one embodiment of the present invention, a filter screen 205 is provided on the side of the air cavity 204 away from the mounting head 104. The filter screen 205 covers the outside of the air cavity 204, and the air cavity 204 is connected to the outside air through the outer filter screen 205 to assist the patient to breathe through the nose. The filter screen 205 is used to filter impurities in the outside air and reduce irritation to the patient's airway.

[0040] When the patient breathes through the nose, the air is purified by the filter 205 and enters the air chamber 204. It is then supplied to the respiratory tract through the connection hole 107 and the air delivery chamber 106, reducing the risk of infection.

[0041] In one embodiment of the present invention, an annular sensing electrode is embedded around the suction port 1043 at the front end of the mounting head 104. The annular sensing electrode is signal-connected to the control unit connected to the negative pressure tube 102, and is used to detect the accumulation of secretions and trigger the start and stop of negative pressure suction.

[0042] During operation, when secretions come into contact with the ring-shaped sensing electrode, the electrode detects a change in conductivity, and the signal is transmitted to the control unit, which automatically starts negative pressure suction until the secretions are cleared, thus achieving intelligent management.

[0043] In one embodiment of the present invention, both the flexible pad 1042 and the flexible protective pad 208 are made of medical-grade silicone material and are fixed to the mounting head 104 and the supporting arc plate 207 by overmolding or bonding, respectively.

[0044] During operation, medical-grade silicone provides a soft contact surface, reducing damage to the oral mucosa and improving patient comfort.

[0045] Working principle: such as Figure 1 As shown, the entire device is inserted through the patient's mouth. The medical staff holds the installation collar 201 of the support mechanism 2 and slowly pushes the device in along the midline of the mouth. At this time, the installation head 104 at the front end of the anti-blocking mechanism 1 enters first, and its flexible pad 1042 contacts the soft tissue of the mouth and throat, playing a buffering and protective role. Subsequently, the support arc plate 207 of the support mechanism 2 reaches the root of the tongue.

[0046] When the support plate 207 contacts the surface of the tongue base, due to individual differences in the patient's tongue shape and post-anesthesia muscle tone, the support plate 207 needs to adapt to different anatomical contours. The support plate 207 at the end of the movable rod 2062 of each adjustment component 206 is hinged to the movable rod 2062 via a pivot 2065. When the tongue base surface is uneven or has an angle, the support plate 207 can adaptively deflect around the pivot 2065 at multiple angles. The torsion spring 2066 sleeved on the pivot 2065 provides appropriate restoring torque, so that the support plate 207 can maintain a stable fit with the tongue base after deflection, while not generating excessive rigid pressure.

[0047] Meanwhile, the movable rod 2062 itself can extend and retract within the mounting tube 2061, and the compression spring 2063 inside provides elastic support force perpendicular to the surface of the tongue root for the entire support arc plate 207. This allows the device to adapt to different patients' throat depths and to buffer the impact caused by patients' unconscious swallowing, coughing and other actions.

[0048] During the process of the support arc plate 207 fitting against the tongue root, the pressure of the tongue root on the support arc plate 207 will be transmitted to the compression spring 2063 through the movable rod 2062, and finally act on the pressure sensor 2064 at the bottom of the mounting tube 2061.

[0049] The pressure sensor 2064 monitors the pressure value in real time, and the pressure data is transmitted to an external control unit connected to the negative pressure pipe 102 via a signal line (not shown in the figure, which can usually be integrated inside the component or arranged along the main pipe 101).

[0050] The control unit has a preset safety pressure threshold, and the workflow is as follows:

[0051] Normal pressure (within the threshold range): This indicates that the support force is appropriate, the device is in normal working condition, the control unit does not issue alarms, and all current functions are maintained.

[0052] Insufficient pressure may indicate that the support plate 207 is not effectively conforming to the base of the tongue, posing a risk of support failure and recurrence of tongue retraction. The control unit can trigger a visual or audible alarm to alert medical personnel to check the device's position.

[0053] Excessive pressure: This indicates that the support arc plate 207 is applying excessive local pressure to the base of the tongue, which may cause tissue ischemia or damage. The control unit will immediately issue a high-level alarm and may attempt to adjust the associated negative pressure suction intensity (such as temporarily reducing the suction to reduce the overall inward pulling force) or directly request medical staff to intervene and adjust according to the preset program.

[0054] When a patient breathes, airflow enters the lungs primarily through two pathways:

[0055] Path 1 (Main Ventilation Path): External air → Air chamber 204 of mounting collar 201 → Passes through filter screen 205 (filtered and purified) → Passes through perforation 203 → Enters connection hole 107 on the outside of main pipe 101 → Enters air delivery chamber 106 → Flows to breathing chamber 1041 at the end of mounting head 104 → Passes through breathing hole 1044 → Enters the patient's pharyngeal airway;

[0056] Pathway 2 (Assisted / Nasal Breathing Pathway): Air inhaled by the patient through the nasal cavity → passes through the nasopharynx and oropharynx → bypasses the outside of the mounting head 104 → also enters the pharyngeal airway;

[0057] This dual-path design ensures that even if the flow rate of one path decreases for some reason, the other path can still provide effective ventilation. The design of the air guide chamber 106 surrounding the suction chamber 105 achieves physical isolation between the airflow and the sewage pipeline.

[0058] Around the suction port 1043 at the front end of the mounting head 104, an annular sensing electrode (such as a metal ring) is embedded. In a dry state, the conductivity between the electrodes is very low. When respiratory secretions (sputum, blood, etc., rich in electrolytes) accumulate and come into contact with the annular electrode, the conductivity between the electrodes increases significantly. The signal of the conductivity change is transmitted to the external control unit in real time. After receiving the signal, the control unit immediately activates the external negative pressure source connected to the negative pressure tube 102. The negative pressure is transmitted to the suction chamber 105 through the negative pressure tube 102, and finally a suction force is formed at the suction port 1043. The suction force quickly draws the accumulated secretions from the suction port 1043 into the suction chamber 105, where they are then drawn in. Since the suction chamber 105 and the air guide chamber 106 are separate, the inhaled liquid and solid waste will not block the airway. The inhaled secretions are temporarily stored in the suction chamber 105 and eventually discharged into the collection container from the drain pipe 103 located at the lower rear under the action of gravity or continuous negative pressure. When the secretions at the suction port 1043 are cleaned, the annular sensing electrode returns to a dry state and the conductivity decreases. The control unit detects this change and automatically shuts off the negative pressure source and stops suctioning after a short delay (to ensure that the suction is clean). This process realizes the intelligent operation of "sucking when there is sputum and stopping when there is no sputum", avoiding damage to the mucosa and energy waste caused by continuous negative pressure.

[0059] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An intelligent protective device for preventing airway obstruction after anesthesia, comprising an anti-blocking mechanism (1) and a support mechanism (2), characterized in that, The anti-blocking mechanism (1) includes a main pipe (101), a negative pressure pipe (102) connected to the rear end of the main pipe (101), a sewage pipe (103) connected to the bottom of the rear end of the main pipe (101), and an installation head (104) fixedly installed at the front end of the main pipe (101). A breathing chamber (1041) is formed inside the installation head (104), a flexible pad (1042) is covered on the outer wall of the installation head (104), a suction port (1043) is opened on the front end face of the installation head (104), and multiple breathing holes (1044) are distributed on the circumferential side wall of the installation head (104). The breathing holes (1044) are connected to the breathing chamber (1041). The support mechanism (2) includes an installation The mounting ring (201) has a mounting hole (202) for the main pipe (101) to pass through. Several adjustment components (206) are provided on the side of the mounting ring (201). The mounting ring (201) is connected to a support arc plate (207) through the adjustment components (206). A flexible protective pad (208) is provided on the outer side of the support arc plate (207). The main pipe (101) of the anti-blocking mechanism (1) passes through the mounting hole (202) of the support mechanism (2), so that the mounting head (104) is located in front of the support arc plate (207), together forming an overall structure that can be inserted into the patient's oral cavity and act on the tongue root and pharyngeal area.

2. The intelligent protective device for preventing airway obstruction after anesthesia according to claim 1, characterized in that, The adjustment assembly (206) includes a mounting tube (2061), a movable rod (2062), and a pressure sensor (2064). One end of the mounting tube (2061) is fixedly connected to the side of the mounting collar (201). The movable rod (2062) is partially sleeved inside the mounting tube (2061). The pressure sensor (2064) is located at the bottom inside the mounting tube (2061). One end of the movable rod (2062) inside the mounting tube (2061) is connected to the pressure sensor (2064) on the bottom wall of the mounting tube (2061) via a compression spring (2063). The movable rod (2062) can extend and retract relative to the mounting tube (2061) under the support of the compression spring (2063). The pressure sensor (2064) is used to detect the pressure of the tongue root on the support arc plate (207).

3. The intelligent protective device for preventing airway obstruction after anesthesia according to claim 2, characterized in that, The adjustment assembly (206) further includes a rotating shaft (2065), a side block (2067), and a torsion spring (2066). The rotating shaft (2065) is connected to the end of the movable rod (2062). The torsion spring (2066) is sleeved on the rotating shaft (2065). The side block (2067) is fixedly disposed on the back of the support arc plate (207) and is hinged to the movable rod (2062) through the rotating shaft (2065). The two ends of the torsion spring (2066) act on the side block (2067) and the movable rod (2062) respectively to provide a restoring torque. The support arc plate (207) is hinged to the movable rod (2062) through the rotating shaft (2065) and can perform multi-angle adaptive deflection under the torque of the torsion spring (2066).

4. The intelligent protective device for preventing airway obstruction after anesthesia according to claim 1, characterized in that, The anti-clogging mechanism (1) also has a suction chamber (105) and an air guide chamber (106) inside. The suction chamber (105) is located inside the main pipe (101) and is connected to the suction port (1043) and the drain pipe (103) for collecting inhaled secretions. The air guide chamber (106) is arranged around the suction chamber (105). The end of the air guide chamber (106) near the mounting head (104) is connected to the breathing chamber (1041). The main pipe (101) has several connecting holes (107) on its outer side wall. The end of the air guide chamber (106) away from the mounting head (104) is connected to the connecting hole (107). The suction chamber (105) is connected to the negative pressure pipe (102). The air guide chamber (106) is used to guide airflow and maintain respiratory tract ventilation through the breathing hole (1044). At the same time, it works with the suction chamber (105) to achieve gas-liquid separation.

5. The intelligent protective device for preventing airway obstruction after anesthesia according to claim 1, characterized in that, The negative pressure pipe (102) is configured to connect to an external negative pressure source. The external negative pressure source is connected to the suction port (1043) through the suction chamber (105) in the main pipe (101) to form a fluid connection, so as to generate suction at the suction port (1043).

6. The intelligent protective device for preventing airway obstruction after anesthesia according to claim 4, characterized in that, An air cavity (204) is provided inside the mounting collar (201), and a number of through holes (203) are provided inside the mounting hole (202). The positions of the through holes (203) correspond to the connecting hole (107), so that the connecting hole (107) passes through the through holes (203) and enters the air cavity (204).

7. The intelligent protective device for preventing airway obstruction after anesthesia according to claim 6, characterized in that, A filter (205) is provided on the side of the air cavity (204) away from the mounting head (104). The filter (205) covers the outside of the air cavity (204). The air cavity (204) is connected to the outside air through the outer filter (205) to assist the patient in breathing through the nose. The filter (205) is used to filter impurities in the outside air and reduce irritation to the patient's airway.

8. The intelligent protective device for preventing airway obstruction after anesthesia according to claim 1, characterized in that, A ring-shaped sensing electrode is embedded around the suction port (1043) at the front end of the mounting head (104). The ring-shaped sensing electrode is connected to the control unit connected to the negative pressure tube (102) for detecting the accumulation of secretions and triggering the start and stop of negative pressure suction.

9. The intelligent protective device for preventing airway obstruction after anesthesia according to claim 1, characterized in that, Both the flexible pad (1042) and the flexible protective pad (208) are made of medical-grade silicone material and are fixed to the mounting head (104) and the supporting arc plate (207) respectively by overmolding or bonding.

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