Auxiliary device for difficult airway intubation

Abstract

The invention relates to the technical field of medical instruments, and provides a difficult airway intubation auxiliary device which comprises an air duct body and an auxiliary tube wall, the air duct body is provided with an upper curved surface and a lower curved surface, the upper curved surface abuts against the upper jaw of the oral cavity of the human body, and an open airway is formed in the upper curved surface; two ends of the open air passage respectively penetrate through two ends of the air passage main body; the auxiliary tube wall is arranged on the lower curved surface and forms an auxiliary channel, one end, close to the lip of the oral cavity of the human body, of the auxiliary tube wall is connected with an oxygen tube, and the oxygen tube is communicated with the auxiliary channel. The difficult airway intubation auxiliary device can meet the clinical diversified auxiliary function requirements.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and in particular to a device for assisting in difficult airway intubation. Background Technology

[0002] An oropharyngeal airway is a commonly used airway management aid, typically made of materials such as plastic or rubber. Placed inside the mouth, across the base of the tongue, it opens the airway, preventing the tongue from falling back and obstructing the airway, thus ensuring airflow to the lungs and maintaining normal respiratory function. In emergencies such as cardiac arrest, severe trauma, and asphyxia, rapidly establishing an effective airway is crucial. An oropharyngeal airway can be inserted into the patient's mouth within seconds, quickly opening the airway and buying valuable time for subsequent cardiopulmonary resuscitation, oxygen administration, and other emergency measures. Furthermore, during the induction and recovery phases of general anesthesia, patients' swallowing and cough reflexes are weakened or absent, increasing the risk of tongue retraction. An oropharyngeal airway assists anesthesiologists in maintaining airway patency, ensuring stable breathing during anesthesia.

[0003] Traditional oropharyngeal airways are primarily designed for the basic function of airway opening, lacking consideration for overall functionality. In clinical practice, doctors often require multiple functions to work together to better manage the airway. For example, once the airway is open, existing oropharyngeal airways cannot provide convenient guidance and maneuvering space for endotracheal intubation. Doctors may need to remove the oropharyngeal airway first before performing endotracheal intubation, which not only increases the number of steps and time involved but may also prolong airway exposure time, increasing the risk of hypoxia in the patient. Furthermore, there is no effective solution for clearing airway secretions. Excessive airway secretions, if not cleared promptly, can easily lead to complications such as airway obstruction and lung infection. Therefore, there is an urgent need for an endotracheal intubation assistive device to address the limitations of existing oropharyngeal airways in providing only one function. Summary of the Invention

[0004] To meet the diverse clinical needs for assistive functions, this application provides a device for assisting with difficult airway intubation.

[0005] The technical solution of the difficult airway intubation auxiliary device provided in this application is as follows: A difficult airway intubation assistance device includes an airway body and an auxiliary tube wall. The airway body has an upper curved surface and a lower curved surface. The upper curved surface abuts against the palate of the human mouth and has an open airway. The two ends of the open airway pass through the two ends of the airway body. The lower curved surface abuts against the tongue of the human mouth. The auxiliary tube wall is disposed on the lower curved surface and forms an auxiliary channel. An oxygen tube is connected to the end of the auxiliary tube wall near the lips of the human mouth, and the oxygen tube is connected to the auxiliary channel.

[0006] By adopting the above-mentioned technical solution, an auxiliary channel is independently set on the lower curved surface of the main airway. Firstly, this auxiliary channel guides the insertion of the endotracheal tube, effectively connecting airway opening and endotracheal intubation, improving the continuity of airway management. Secondly, the auxiliary channel can also accommodate the insertion of a suction catheter to absorb oral secretions and maintain airway cleanliness and patency. Thirdly, an oxygen tube is installed on the side of the auxiliary tube wall, forming an independent oxygen channel that can be connected to an external oxygen source. This provides a continuous oxygen supply to the patient without affecting suctioning, ensuring the patient's oxygenation level during airway management. This meets diverse clinical needs for auxiliary functions and improves the quality and safety of airway management.

[0007] Optionally, an observation head is provided at one end of the main body of the airway near the human oral cavity and pharynx. The observation head is connected to a transmission wire, one end of which is electrically connected to the observation head, and the other end extends outward along the auxiliary tube wall.

[0008] By adopting the above technical solution, an observation head is installed at the end of the main airway, and an external display device is connected through a transmission wire. Medical staff can clearly view the condition of the oral cavity and airway through the display device, providing more accurate visual guidance for endotracheal intubation, sputum suction and other operations, and improving the accuracy and safety of the operation.

[0009] Optionally, an air bladder is provided on the side of the lower curved surface near the human oral cavity and throat. The air bladder is connected to an inflation tube, one end of which is connected to the air bladder and the other end extends outward along the auxiliary tube wall.

[0010] By adopting the above technical solution, an airbag is set on the lower curved surface, and air is pumped into the airbag through the inflation tube to control the inflation of the airbag. This can effectively push open the tongue in the human mouth, expose a wider airway space, and further ensure airway patency.

[0011] Optionally, the inflation tube is connected to an external tube, which is connected to an inflation seat. The inflation seat is equipped with an inflation / deflation assembly for inflating or deflating the airbag.

[0012] Optionally, the inflatable base has an inflation chamber, and the end of the outer tube away from the inflation tube is connected to the inflation chamber; the inflation / discharging assembly includes a driving block, a limiting sleeve, and a locking fastener. The driving block is slidably installed in the inflation chamber, and the outer wall of the inflatable base has a vent hole. When the driving block slides to the side of the inflation chamber away from the outer tube, the vent hole is connected to the inflation chamber; when the driving block slides towards the side closer to the outer tube, the driving block covers the vent hole; the limiting sleeve is fitted on the outer peripheral wall of the inflatable base and connected to the driving block, and the locking fastener is disposed between the limiting sleeve and the inflatable base to restrict the free movement of the driving block.

[0013] By employing the above technical solution, when inflating the airbag, the limiting sleeve forces the drive block to slide towards the side closer to the outer tube. At this time, the drive block covers the vent, preventing air leakage from the inflation chamber. This forces the air in the inflation chamber through the outer tube and inflation tube into the airbag, causing it to inflate and ensuring unobstructed airflow. After the airbag inflates, the limiting sleeve is locked in place by a locking fastener, restricting the free movement of the drive block and maintaining the inflated state of the airbag. To deflate, simply pull the limiting sleeve, forcing the drive block to slide away from the outer tube in the inflation chamber, thus depressurizing the airbag and improving the overall ease of operation.

[0014] Optionally, the locking device includes a locking block disposed on the inner peripheral wall of the limiting sleeve, and a sliding groove is provided on the outer peripheral wall of the inflatable seat. The two ends of the sliding groove extend along the sliding direction of the driving block, and the locking block is slidably embedded in the sliding groove. The limiting sleeve and the driving block are rotatably connected, and a locking groove is provided on the inner wall of the sliding groove for the locking block to rotate into.

[0015] By adopting the above technical solution, during inflation, pulling the limiting sleeve causes the locking block to slide within the sliding groove, forcing the driving block to slide towards the side closer to the outer tube. This forces the air in the inflation chamber to be squeezed sequentially through the outer tube and inflation tube into the inflation bladder, causing it to inflate. Then, rotating the limiting sleeve forces the locking block into the locking groove, locking the position of the limiting sleeve and restricting the free movement of the driving block. This maintains the air pressure within the inflation bladder and improves the overall ease of operation.

[0016] Optionally, a fine-tuning push block is slidably mounted on the side of the drive block near the outer pipe, and a fine-tuning component is provided between the fine-tuning push block and the drive block. The fine-tuning component is used to drive the fine-tuning push block closer to or away from the drive block.

[0017] By adopting the above technical solution, after the driving block slides towards the side closer to the outer tube to force the airbag to inflate and lock the limiting sleeve, the fine-tuning component can drive the fine-tuning push block to move closer to or away from the driving block to adjust the air pressure inside the airbag, that is, the inflation range of the airbag. This avoids discomfort or damage to the patient's oral tissues due to excessive air pressure inside the airbag, and also ensures that the airbag can be maintained in a suitable inflation state to achieve the best airway opening effect.

[0018] Optionally, the fine-tuning component includes a rotating screw, a rotating disk, and a linkage. The length direction of the rotating screw is consistent with the sliding direction of the drive block. One end of the rotating screw is rotatably connected to the drive block, and the other end is threaded through the fine-tuning push block. The rotating disk is rotatably installed at the end of the drive block away from the outer pipe. The linkage is disposed between the rotating disk and the rotating screw to drive the rotating disk and the rotating screw to move in circumferentially.

[0019] By adopting the above technical solution, when fine-tuning the air pressure inside the airbag, rotating the rotating disk drives the rotating screw to rotate under the action of the linkage, thereby forcing the fine-tuning push block to move closer to or further away from the drive block, so as to adjust the expansion range of the airbag.

[0020] Optionally, the drive block has an installation cavity, and the linkage includes a first linkage disk and a second linkage disk rotatably installed in the installation cavity. The first linkage disk is connected to the rotating disk, and the second linkage disk is connected to the rotating screw. The surface of the first linkage disk is provided with a push column, and the surface of the second linkage disk is provided with a push block. Multiple push blocks are arranged at intervals around the central axis of the second linkage disk, and a push area is formed between two adjacent push blocks for the push column to rotate into.

[0021] By employing the aforementioned technical solution, the rotating disk is driven to rotate, which in turn drives the first linkage disk to rotate. This causes the pushing column to revolve around the central axis of the first linkage disk, intermittently entering the pushing zone of the second linkage disk. When the pushing column enters the pushing zone, the pushing block pushes the second linkage disk to rotate at a certain angle, thereby causing the fine-tuning push block to move. Each rotation of the rotating disk causes the fine-tuning push block to slide a certain distance, thus fine-tuning the air pressure inside the airbag and ensuring that the airbag can be maintained in a suitable inflation state to achieve the best airway opening effect.

[0022] Optionally, the surface of the first linkage disk is provided with a first arc-shaped strip and a second arc-shaped strip, and the virtual central axes of the first arc-shaped strip and the second arc-shaped strip coincide with the central axis of the first linkage disk; the first arc-shaped strip and the second arc-shaped strip are spaced apart to form an anti-rotation slide. When the push column rotates into the push area, the push block disengages from the anti-rotation slide. When the push column rotates out of the push area, part of the push block is embedded in the anti-rotation slide.

[0023] By adopting the above technical solution, the first and second arc-shaped strips combine to form an anti-rotation slide, thereby ensuring that when the push column enters the push area to push the push block, the push block can disengage from the anti-rotation slide, ensuring that the second linkage disc can rotate at a certain angle following the first linkage disc. As the rotating disc rotates, when the push column rotates out of the push area, part of the push block is embedded in the anti-rotation slide to restrict the free rotation of the second linkage disc, thereby limiting the position of the fine-tuning push block and maintaining stable air pressure inside the inflatable bag.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. By setting up auxiliary channels, firstly, they can guide the insertion of endotracheal tubes, effectively connecting airway opening and endotracheal intubation, thus improving the continuity of airway management. Secondly, the auxiliary channels can also be used to insert suction catheters to absorb oral secretions and maintain airway cleanliness and patency. Thirdly, an oxygen tube is installed on the side of the auxiliary channel wall, forming an independent oxygen channel that can be connected to an external oxygen source. This allows for a continuous oxygen supply to the patient without affecting suctioning, ensuring the patient's oxygenation level during airway management. This meets diverse clinical needs for auxiliary functions and improves the quality and safety of airway management. 2. The inflation / deflation assembly allows the airbag to inflate by using a limiting sleeve to force the drive block to slide towards the outer tube. This drive block covers the vent, preventing air leakage from the inflation chamber. The air is then forced through the outer tube and inflation tube into the airbag, causing it to inflate and ensuring unobstructed airflow. Once inflated, the limiting sleeve is locked in place by a locking fastener, restricting the drive block's movement and maintaining the airbag's inflated state. Deflating the airbag is achieved by simply pulling the limiting sleeve and forcing the drive block to slide away from the outer tube, improving the overall ease of operation. 3. By setting up the fine-tuning component, the rotating disk is driven to rotate, which in turn drives the first linkage disk to rotate. This causes the push column to "revolve" around the central axis of the first linkage disk, intermittently entering the pushing zone of the second linkage disk. When the push column enters the pushing zone, the push block pushes the second linkage disk to rotate at a certain angle, thereby driving the movement of the fine-tuning push block. Each rotation of the rotating disk drives the fine-tuning push block to slide a certain distance, thereby fine-tuning the air pressure inside the airbag and ensuring that the airbag can be maintained in a suitable inflation state to achieve the best airway opening effect. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of Example 1; Figure 2 This is a partial cross-sectional view of the charging and discharging assembly in Embodiment 2; Figure 3 This is a partial cross-sectional view of the locking block in Embodiment 2; Figure 4 This is a partial cross-sectional view of the locking groove in Embodiment 2; Figure 5 This is a partial cross-sectional view of the fine-tuning component in Embodiment 3; Figure 6 This is a partial cross-sectional view of Embodiment 3, illustrating the first and second linkage discs; Figure 7 This is a partial cross-sectional view of the opening and closing plate in Embodiment 4; Figure 8This is a partial cross-sectional view of the connecting groove in Embodiment 4.

[0026] Explanation of reference numerals in the attached drawings: 1. Main body of the ventilation duct; 11. Upper curved surface; 12. Lower curved surface; 13. Open airway; 14. Observation head; 141. Transmission wire; 15. Inflatable bladder; 151. Inflatable tube; 16. Spray tube; 2. Auxiliary tube wall; 21. Auxiliary channel; 22. Oxygen tube; 3. External tube; 4. Inflatable seat; 41. Inflatable chamber; 42. Ventilation hole; 43. Sliding groove; 44. Locking groove; 45. Fine-tuning push block; 46. Connecting cavity; 47. Connecting hole; 5. Inflation / discharge assembly; 51. Drive block; 511. Mounting cavity; 512. First rotating rod; 513. Second rotating rod; 514. Second gear; 52. Limiting sleeve; 53. Locking block; 6. Fine-tuning assembly; 61. Rotating screw; 611. First gear; 612. Connecting groove; 613. Anti-detachment block; 62. Rotating disk; 63. First linkage disk; 631. Pushing column; 632. First arc-shaped strip; 633. Second arc-shaped strip; 634. Anti-rotation slide; 64. Second linkage disk; 641. Pushing block; 642. Pushing area; 7. Opening and closing plate; 71. Connecting rod; 72. Connecting groove. Detailed Implementation

[0027] The following combination Figures 1-8 This application will be described in further detail.

[0028] Example 1: This application discloses an auxiliary device for difficult airway intubation.

[0029] Reference Figure 1 An auxiliary device for difficult airway intubation includes an airway body 1 and an auxiliary tube wall 2. The airway body 1 is generally arc-shaped to conform to the shape of the human oral cavity. The airway body 1 has an upper curved surface 11 and a lower curved surface 12. The upper curved surface 11 is used to abut against the palate of the human oral cavity, and the lower curved surface 12 is used to abut against the tongue of the human oral cavity. An open airway 13 is formed on the upper curved surface 11, and the two ends of the open airway 13 pass through the two ends of the airway body 1. In this embodiment, the cross-sectional shape of the open airway 13 is "C". This design, by forming an open airway 13 on the upper curved surface 11, reduces the contact area between the airway body 1 and the palate of the human oral cavity, thereby reducing the discomfort caused to the patient's oral cavity when the airway body 1 is inserted into the human oral cavity.

[0030] An auxiliary tube wall 2 is disposed on the lower curved surface 12 and forms an auxiliary channel 21. The auxiliary channel 21 is used for the insertion of air supply tubes, suction tubes, etc., to guide the trachea and suction tubes, reducing resistance and damage to oral tissues during intubation. An oxygen tube 22 is fixedly connected to one end of the auxiliary tube wall 2 near the lips of the patient's mouth. One end of the oxygen tube 22 is connected to the auxiliary channel 21, and the other end is used to connect to an oxygen supply device. This design allows for a continuous oxygen supply to the patient without affecting the suctioning procedure, ensuring the patient's oxygenation level during airway management.

[0031] In this embodiment, an observation head 14 is fixedly installed at one end of the airway body 1 near the human oral cavity and pharynx. The observation head 14 is a high-definition camera. A transmission wire 141 is embedded in the auxiliary tube wall 2 (within the wall thickness of the auxiliary tube wall 2). One end of the transmission wire 141 is electrically connected to the observation head 14, and the other end extends outward along the auxiliary tube wall 2. The transmission wire 141 can be used to connect to an external display screen to provide accurate visual guidance for operations such as endotracheal intubation and sputum suction.

[0032] An inflatable bladder 15 is fixedly installed on the side of the lower curved surface 12 near the oral cavity and pharynx. The inflatable bladder 15 can be fixedly installed to the main body 1 of the airway by adhesive bonding. An inflation tube 151 is embedded in the auxiliary tube wall 2. One end of the inflation tube 151 is connected to the inside of the inflatable bladder 15, and the other end extends outward along the auxiliary tube wall 2. With this design, when it is necessary to further open the airway 13, medical staff can inflate the inflatable bladder 15 through an external device, so that the gas enters the inflatable bladder 15 through the inflation tube 151. After the inflatable bladder 15 inflates, it can effectively push the tongue open, exposing a wider airway space and further ensuring the patency of the airway.

[0033] The auxiliary tube wall 2 is embedded with a spray tube 16. One end of the spray tube 16 extends to the end of the airway body 1 near the human oral cavity and pharynx, and the other end extends outward along the auxiliary tube wall 2 for connecting to an external anesthetic syringe or spray device. With this design, medical staff can spray local anesthetic on the mucosal surface of the pharynx through this passage as needed to achieve local anesthesia.

[0034] The implementation principle of Embodiment 1 of this application is as follows: An auxiliary channel 21 is independently set on the lower curved surface 12 of the airway body 1. On the one hand, the auxiliary channel 21 can guide the insertion of the catheter, realizing the effective connection between airway opening and endotracheal intubation, and improving the continuity of airway management. On the other hand, the auxiliary channel 21 can also be used for the insertion of a suction catheter to absorb oral secretions and keep the airway clean and unobstructed. On the third hand, an oxygen tube 22 is set on the side of the auxiliary tube wall 2 to form an independent oxygen channel, which can be connected to an external oxygen source to continuously provide oxygen supply to the patient without affecting the suction operation, ensuring the patient's oxygenation level during airway management. A transmission wire 141, an inflation tube 151, and a drug spraying tube 16 are respectively embedded in the auxiliary tube wall 2 to meet the diverse clinical auxiliary function needs and improve the quality and safety of airway management.

[0035] Example 2: This application discloses an auxiliary device for difficult airway intubation.

[0036] The difference between the difficult airway intubation assistance device disclosed in this application and Embodiment 1 is that: Reference Figure 2 In this embodiment, the end of the inflation tube 151 away from the inflation bag 15 (the inflation tube 151 is not shown in this embodiment) is connected to the outer tube 3. The inflation tube 151 and the outer tube 3 can be detachably connected by interference fit, or they can be detachably connected by plug-in quick connector (not shown in the figure). The inflation tube 151 and the outer tube 3 can also be integrally formed to achieve a fixed connection.

[0037] The end of the outer tube 3 away from the inflation tube 151 is connected to an inflation seat 4. An inflation chamber 41 is opened inside the inflation seat 4, and the end of the outer tube 3 away from the inflation tube 151 is connected to the inflation chamber 41. The inflation seat 4 is provided with an inflation / deflation component 5 for inflating or deflating the airbag 15.

[0038] Reference Figure 2 , Figure 3 The inflation / deflation assembly 5 includes a drive block 51, a limiting sleeve 52, and a locking fastener. The drive block 51 is slidably installed in the inflation chamber 41. The outer wall of the inflation seat 4 has a vent hole 42. When the drive block 51 slides to the side of the inflation chamber 41 away from the outer tube 3, the vent hole 42 connects to the inflation chamber 41. When the drive block 51 slides towards the side closer to the outer tube 3, the drive block 51 covers the vent hole 42. The limiting sleeve 52 is fitted on the outer peripheral wall of the inflation seat 4 and connected to the drive block 51. The locking fastener is set between the limiting sleeve 52 and the inflation seat 4 to restrict the free movement of the drive block 51.

[0039] Reference Figure 2 , Figure 4In this embodiment, the locking device includes two locking blocks 53, which are arranged at intervals around the central axis of the limiting sleeve 52. Each locking block 53 is fixedly installed on the inner peripheral wall of the limiting sleeve 52. The outer peripheral wall of the inflatable base 4 has two sliding grooves 43. The two ends of the sliding grooves 43 extend along the sliding direction of the driving block 51. The two sliding grooves 43 are correspondingly arranged with the two locking blocks 53, and each locking block 53 is slidably embedded in the corresponding sliding groove 43. The limiting sleeve 52 is rotatably connected to the driving block 51. The inner wall of the sliding groove 43 has a locking groove 44 for the locking block 53 to rotate into.

[0040] The implementation principle of Embodiment 2 of this application is as follows: When inflating the airbag 15, the limiting sleeve 52 forces the driving block 51 to slide towards the side closer to the outer tube 3. At this time, the driving block 51 covers the vent 42, preventing air from leaking out of the inflation chamber 41. The air in the inflation chamber 41 is then squeezed into the airbag 15 by the outer tube 3 and the inflation tube 151, causing the airbag 15 to inflate and ensuring unobstructed air passage. After the airbag 15 inflates, the limiting sleeve 52 is rotated, forcing the locking block 53 to rotate into the locking groove 44 to lock the position of the limiting sleeve 52, thereby restricting the free movement of the driving block 51, maintaining the air pressure inside the airbag 15, and improving the overall ease of operation.

[0041] Example 3: This application discloses an auxiliary device for difficult airway intubation.

[0042] The difference between the difficult airway intubation assistance device disclosed in this application and Embodiment 2 is that: Reference Figure 5 In this embodiment, a fine-tuning push block 45 is provided on the side of the drive block 51 near the outer tube 3. The fine-tuning push block 45 is slidably installed in the inflation chamber 41. A fine-tuning component 6 is provided between the fine-tuning push block 45 and the drive block 51. The fine-tuning component 6 is used to drive the fine-tuning push block 45 to move closer to or away from the drive block 51.

[0043] The fine-tuning component 6 includes a rotating screw 61, a rotating disk 62, and a linkage. The length direction of the rotating screw 61 is consistent with the sliding direction of the drive block 51. One end of the rotating screw 61 is rotatably connected to the drive block 51, and the other end passes through the fine-tuning push block 45 and is threadedly connected to the fine-tuning push block 45. An anti-detachment block 613 is fixedly connected to the end of the rotating screw 61 away from the drive block 51. The rotating disk 62 is rotatably mounted on the end of the drive block 51 away from the outer pipe 3. An installation cavity 511 is opened in the drive block 51. The linkage is set between the rotating disk 62 and the rotating screw 61 to drive the rotating disk 62 and the rotating screw 61 to move in circumferentially.

[0044] Reference Figure 5 , Figure 6The linkage components include a first linkage disc 63 and a second linkage disc 64, both of which are disposed within the mounting cavity 511. A first rotating rod 512 and a second rotating rod 513 are rotatably mounted within the mounting cavity 511. One end of the first rotating rod 512 is coaxially fixed to the first linkage disc 63, and the other end extends out of the drive block 51 and is coaxially fixed to the rotating disc 62. The second linkage disc 64 is coaxially fixed to the outer peripheral wall of the second rotating rod 513. One end of the rotating screw 61 extends into the mounting cavity 511 and is coaxially fixed to the first gear 611. The outer peripheral wall of the second rotating rod 513 is coaxially fixed to the second gear 514. The first gear 611 and the second gear 514 mesh and transmit power.

[0045] A push column 631 is rotatably connected to the surface of the first linkage disk 63. The push column 631 and the first rotating rod 512 are eccentrically arranged so that the push column 631 can "revolve" around the central axis of the first linkage disk 63. A push block 641 is fixedly installed on the surface of the second linkage disk 64. Multiple push blocks 641 are arranged at intervals around the central axis of the second linkage disk 64. A push area 642 is formed between two adjacent push blocks 641 for the push column 631 to rotate into.

[0046] The surface of the first linkage disk 63 is fixedly equipped with a first arc-shaped strip 632 and a second arc-shaped strip 633, respectively. The virtual central axes of the first arc-shaped strip 632 and the second arc-shaped strip 633 coincide with the central axis of the first linkage disk 63. The first arc-shaped strip 632 is located outside the second arc-shaped strip 633. The first arc-shaped strip 632 and the second arc-shaped strip 633 are spaced apart to form an anti-rotation slide 634. When the push column 631 rotates into the push area 642, the push block 641 disengages from the anti-rotation slide 634. When the push column 631 rotates out of the push area 642, part of the push block 641 is embedded in the anti-rotation slide 634.

[0047] The implementation principle of Embodiment 3 of this application is as follows: After the driving block 51 slides towards the side closer to the outer tube 3, it forces the airbag 15 to expand and lock the limiting sleeve 52. Then, it can drive the fine-tuning push block 45 to move closer to or away from the driving block 51 to adjust the air pressure in the airbag 15, that is, the expansion range of the airbag 15. This avoids discomfort or damage to the patient's oral tissues due to excessive air pressure in the airbag 15, and also ensures that the airbag 15 can be maintained in a suitable expansion state to achieve the best airway opening effect.

[0048] When the fine-tuning push block 45 slides, the rotating disk 62 is rotated, causing the first linkage disk 63 to rotate. This causes the push column 631 to "revolve" around the central axis of the first linkage disk 63, intermittently entering the push area 642 of the second linkage disk 64. When the push column 631 enters the push area 642, the push block 641 pushes the second linkage disk 64 to rotate by a certain angle, thereby driving the movement of the fine-tuning push block 45. Each rotation of the rotating disk 62 drives the fine-tuning push block 45 to slide a certain distance, thereby fine-tuning the air pressure inside the inflatable bag 15 to ensure that the inflatable bag 15 can maintain a suitable inflation state to achieve the best airway opening effect.

[0049] Example 4: This application discloses an auxiliary device for difficult airway intubation.

[0050] The difference between the difficult airway intubation assistance device disclosed in this application and Embodiment 3 is that: Reference Figure 7 , Figure 8 In this embodiment, the inflatable base 4 has a connecting cavity 46 in the side wall near the outer tube 3. One end of the outer tube 3 is connected to the connecting cavity 46. The inner wall of the connecting cavity 46 has a plurality of connecting holes 47 that connect to the inflation cavity 41. The outer tube 3 is connected to the inflation cavity 41 through the connecting cavity 46.

[0051] An opening and closing plate 7 is installed inside the inflation chamber 41. The opening and closing plate 7 is attached to the inner wall of the inflation chamber 41 near the outer pipe 3. A connecting rod 71 is fixedly installed on the plate surface of the opening and closing plate 7. The cross-sectional shape of the connecting rod 71 is polygonal. A connecting groove 612 is opened at one end of the rotating screw 61 near the outer pipe 3. The shape of the connecting groove 612 is adapted to the shape of the connecting rod 71 so that the connecting rod 71 can slide and be inserted. This design is so that when the rotating screw 61 rotates, it drives the opening and closing plate 7 to rotate.

[0052] The opening and closing plate 7 has multiple connecting slots 72 on its surface. The multiple connecting slots 72 are arranged at intervals around the central axis of the rotating screw 61. When the pushing column 631 rotates into the pushing area 642 (that is, when the rotating screw 61 rotates), the connecting slot 72 is connected to the connecting hole 47. When the pushing column 631 rotates out of the pushing area 642 (that is, when the rotating screw 61 does not rotate), the connecting slot 72 and the connecting hole 47 are misaligned.

[0053] The implementation principle of Embodiment 4 of this application is as follows: By setting the opening and closing plate 7, when the pushing column 631 rotates out of the pushing area 642, the connecting groove 72 and the connecting hole 47 are misaligned, thereby cutting off the connection between the inflation chamber 41 and the connecting chamber 46. With the cover of the vent hole 42 by the driving block 51, two seals are formed to maintain the stable air pressure in the inflation bag 15, reduce the occurrence of gas leakage, and further ensure that the inflation bag 15 can maintain a suitable expansion state to achieve the best airway opening effect.

[0054] The above are preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made to the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A device for assisting in difficult airway intubation, characterized in that: The system includes a main airway (1) and an auxiliary tube wall (2). The main airway (1) has an upper curved surface (11) and a lower curved surface (12). The upper curved surface (11) abuts against the palate of the human mouth and has an open airway (13). The two ends of the open airway (13) pass through the two ends of the main airway (1). The lower curved surface (12) abuts against the tongue of the human mouth. The auxiliary tube wall (2) is set on the lower curved surface (12) and forms an auxiliary channel (21). The end of the auxiliary tube wall (2) near the lips of the human mouth is connected to an oxygen tube (22), which is connected to the auxiliary channel (21).

2. The auxiliary device for difficult airway intubation according to claim 1, characterized in that: The main body of the airway (1) is equipped with an observation head (14) at one end near the human oral cavity and throat. The observation head (14) is connected to a transmission wire (141). One end of the transmission wire (141) is electrically connected to the observation head (14), and the other end extends outward along the auxiliary tube wall (2).

3. The auxiliary device for difficult airway intubation according to claim 1, characterized in that: An air bladder (15) is provided on the side of the lower curved surface (12) near the human oral cavity and throat. The air bladder (15) is connected to an inflation tube (151). One end of the inflation tube (151) is connected to the air bladder (15), and the other end extends outward along the auxiliary tube wall (2).

4. The auxiliary device for difficult airway intubation according to claim 3, characterized in that: The inflation tube (151) is connected to an external tube (3), and the external tube (3) is connected to an inflation seat (4). The inflation seat (4) is provided with an inflation / deflation assembly (5) for inflating or deflating the inflation bag (15).

5. The auxiliary device for difficult airway intubation according to claim 4, characterized in that: An inflation chamber (41) is provided inside the inflation seat (4), and the end of the outer tube (3) away from the inflation tube (151) is connected to the inflation chamber (41). The inflation and deflation assembly (5) includes a drive block (51), a limiting sleeve (52) and a locking fastener. The drive block (51) is slidably installed in the inflation chamber (41). A vent hole (42) is provided on the outer wall of the inflation seat (4). When the drive block (51) slides to the side of the inflation chamber (41) away from the outer tube (3), the vent hole (42) is connected to the inflation chamber (41). When the drive block (51) slides towards the side closer to the outer tube (3), the drive block (51) covers the vent hole (42). The limiting sleeve (52) is sleeved on the outer peripheral wall of the inflation seat (4) and connected to the drive block (51). The locking fastener is provided between the limiting sleeve (52) and the inflation seat (4) to restrict the free movement of the drive block (51).

6. The auxiliary device for difficult airway intubation according to claim 5, characterized in that: The locking device includes a locking block (53) disposed on the inner peripheral wall of the limiting sleeve (52), and a sliding groove (43) is provided on the outer peripheral wall of the inflatable seat (4). The two ends of the sliding groove (43) extend along the sliding direction of the driving block (51), and the locking block (53) is slidably embedded in the sliding groove (43). The limiting sleeve (52) and the driving block (51) are rotatably connected, and the inner wall of the sliding groove (43) is provided with a locking groove (44) for the locking block (53) to rotate into.

7. The auxiliary device for difficult airway intubation according to claim 5, characterized in that: A fine-tuning push block (45) is slidably mounted on the side of the drive block (51) near the outer pipe (3). A fine-tuning component (6) is provided between the fine-tuning push block (45) and the drive block (51). The fine-tuning component (6) is used to drive the fine-tuning push block (45) to move closer to or away from the drive block (51).

8. The auxiliary device for difficult airway intubation according to claim 7, characterized in that: The fine-tuning component (6) includes a rotating screw (61), a rotating disk (62), and a linkage. The length direction of the rotating screw (61) is consistent with the sliding direction of the drive block (51). One end of the rotating screw (61) is rotatably connected to the drive block (51), and the other end is threaded through the fine-tuning push block (45). The rotating disk (62) is rotatably installed on the end of the drive block (51) away from the outer pipe (3). The linkage is set between the rotating disk (62) and the rotating screw (61) to drive the rotating disk (62) and the rotating screw (61) to move in circumferential linkage.

9. The auxiliary device for difficult airway intubation according to claim 8, characterized in that: The drive block (51) has an installation cavity (511) and a linkage component including a first linkage disk (63) and a second linkage disk (64) rotatably mounted in the installation cavity (511). The first linkage disk (63) is connected to the rotating disk (62), and the second linkage disk (64) is connected to the rotating screw (61). The surface of the first linkage disk (63) is provided with a push column (631), and the surface of the second linkage disk (64) is provided with a push block (641). Multiple push blocks (641) are spaced around the central axis of the second linkage disk (64), and a push area (642) is formed between two adjacent push blocks (641) for the push column (631) to rotate into.

10. The auxiliary device for difficult airway intubation according to claim 9, characterized in that: The surface of the first linkage disk (63) is provided with a first arc-shaped strip (632) and a second arc-shaped strip (633). The virtual central axes of the first arc-shaped strip (632) and the second arc-shaped strip (633) coincide with the central axis of the first linkage disk (63). The first arc-shaped strip (632) and the second arc-shaped strip (633) are spaced apart to form an anti-rotation slide (634). When the push column (631) rotates into the push area (642), the push block (641) disengages from the anti-rotation slide (634). When the push column (631) rotates out of the push area (642), part of the push block (641) is embedded in the anti-rotation slide (634).

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