An oropharyngeal ventilator with airway surface anesthesia function

Abstract

The present invention provides an oropharyngeal airway with an airway surface anesthesia function, which relates to the technical field of medical anesthesia equipment and solves the technical problem in the prior art that oropharyngeal airways can only assist ventilation and have a single function. The oropharyngeal airway with an airway surface anesthesia function is an elliptical tubular structure, comprising a flange, a tooth pad portion, and a pharyngeal curvature portion arranged in sequence, a drug adding port being provided on the flange, and a drug spraying port being provided in the inner cavity at the end of the pharyngeal curvature portion, the drug adding port and the drug spraying port being connected by a drug administration pipeline buried in the flange, the tooth pad portion, and the pharyngeal curvature portion. The present invention is used to improve the clinical performance of the pharyngeal airway.

Description

Technical Field

[0001] The present invention relates to the technical field of medical anesthesia equipment, in particular to an oropharyngeal ventilation tube with airway surface anesthesia function. Background Art

[0002] Patients under general anesthesia generally need to undergo endotracheal intubation. During the endotracheal intubation process, a laryngoscope is first used to pick the throat and then perform endotracheal intubation. During the intubation process, the epiglottis, glottis and airway are stimulated, resulting in a significant increase in hemodynamics.

[0003] Currently, there are two methods for reducing the intubation reflex. One is to increase the depth of anesthesia with drugs such as propofol, opioids, and muscle relaxants to suppress the intubation reflex. The second is to use an anesthetic device to anesthetize the oropharynx and airway surface to reduce the intubation reflex. This latter method is commonly used clinically with items such as spray bottles or laryngeal anesthesia tubes for surface anesthesia, but both have drawbacks. The disadvantages are: 1. Surface anesthesia must be assisted by a laryngoscope, which will lift the throat to expose the glottis, and the assistance process will stimulate the epiglottis, glottis and other parts; 2. The effect of surface anesthesia is related to the anesthesiologist's skills, which may result in insufficient surface anesthesia; 3. Spray bottles and the like can only perform surface anesthesia above the airway, and although laryngeal anesthesia tubes can perform surface anesthesia inside the airway, the curvature of the tube at the front end needs to be adjusted, and at the same time, the glottis needs to be more fully exposed, which will increase the stimulation to the glottis; in addition, the laryngeal anesthesia tube may cause certain damage to the airway during the process of being inserted into the airway; from the above, it can be seen that there is currently no suitable equipment that can reduce stimulation during intubation and fully perform surface anesthesia on and inside the trachea.

[0004] Oropharyngeal airway, also known as oropharyngeal airway, is a non-invasive non-tracheal tube ventilation tube commonly used in clinical practice. It can prevent the tongue from falling back, quickly open the airway, and obtain effective ventilation. Oropharyngeal airways are usually made of rubber or plastic, and can also be made of metal or other elastic materials. The oropharyngeal airway commonly used in clinical practice is an elliptical hollow plastic tube with an "S" shape, including a flange, a tooth pad part, and a pharyngeal curvature part: 1. Flange: There is a protruding outer edge (ie, flange) at the outer end of the mouth to prevent swallowing and too deep insertion. 2. Tooth pad part: The width of the occlusal part where the tooth pad part contacts the teeth should be sufficient to contact two to three teeth, so that the tooth occlusal pressure can be evenly distributed to the contacted teeth. 3. Pharyngeal curvature part: The curvature of the inner end of the pharyngeal curvature part adapts to the anatomy of the mouth, tongue, and posterior pharynx.

[0005] The oropharyngeal airway currently in use is only a device for assisting ventilation and has no other functions. Summary of the Invention

[0006] The present invention aims to provide an oropharyngeal ventilator with airway surface anesthesia to address the technical problem of existing oropharyngeal ventilators, which only provide auxiliary ventilation and a single function. The various technical effects achieved by the preferred technical solution among the various technical solutions provided by the present invention are detailed below.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] The present invention provides an oropharyngeal airway with airway surface anesthesia function. The oropharyngeal airway is an elliptical tubular structure, comprising a flange, a tooth pad portion and a pharyngeal bend portion arranged in sequence. A drug adding port is provided on the flange, and a drug spraying port is provided in the inner cavity at the end of the pharyngeal bend. The drug adding port and the drug spraying port are connected by a drug administration pipeline buried in the flange, the tooth pad portion and the pharyngeal bend portion.

[0009] Preferably, a video camera is also provided in the inner cavity at the end of the pharyngeal curvature.

[0010] Preferably, an air outlet is also provided at the video lens.

[0011] Preferably, the dental pad includes an upper pad and a lower pad, and interlayers are provided on both sides of the upper pad and the lower pad, and the interlayers of the two are plugged into each other; a first lifting mechanism is provided in the interlayer for adjusting the distance between the upper pad and the lower pad.

[0012] Preferably, the outer side of the tooth pad is also covered with a flexible pad.

[0013] Preferably, the pharyngeal curvature includes an upper curvature and a lower curvature, which are plugged into each other; the lower curvature includes a first lower curvature section and a second lower curvature section, and the distal end of the first lower curvature section is hinged to the proximal end of the second lower curvature section; a flipping drive mechanism is also provided between the second lower curvature section and the upper curvature, which drives the second lower curvature section to flip downward compared to the first lower curvature section.

[0014] Preferably, the first lower curved section includes an A lower curved section and a B lower curved section, the distal end of the A lower curved section and the proximal end of the B lower curved section are plugged into each other, a common interlayer is provided at the plugging point, and an extension drive mechanism is provided in the common interlayer.

[0015] Preferably, the oropharyngeal ventilation tube with airway surface anesthesia function also includes a protective part, which includes: an upper protective sub-section, a lower protective sub-section, an outer sleeve part and an inner sleeve part; the upper protective sub-section and the lower protective sub-section are plugged into each other on both sides in the up and down directions and spliced into an elliptical tubular structure; the outer sleeve part and the inner sleeve part are flexible rubber tubes, and the distal end of the outer sleeve part is fixedly connected to the outer side walls of the upper protective sub-section and the lower protective sub-section, and the distal end of the inner sleeve part is fixedly connected to the inner side walls of the upper protective sub-section and the lower protective sub-section.

[0016] Preferably, the lower protective section is provided with a hollow window, and the spray port sprays the anesthetic drug in two directions, downward and backward.

[0017] Preferably, a power-assisting roller is provided below the lower guard section, the extension direction of the power-assisting roller and the extension direction of the lower guard section are perpendicular to each other, and the power-assisting roller partially protrudes from the lower surface of the lower guard section.

[0018] The present invention provides an oropharyngeal airway with airway surface anesthesia function. The oropharyngeal airway is an elliptical tubular structure comprising a flange, a tooth pad, and a pharyngeal curvature, which are arranged in sequence. The flange is provided with a drug addition port, and the inner cavity at the end of the pharyngeal curvature is provided with a drug spray port. The drug addition port and the drug spray port are connected by a drug delivery pipeline embedded in the flange, the tooth pad, and the pharyngeal curvature. During insertion, the patient's mouth and throat can be anesthetized simultaneously, reducing irritation during intubation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a schematic diagram of the side-throwing structure of the oropharyngeal ventilation tube with airway surface anesthesia function provided by the present invention;

[0021] Figure 2 It is a structural schematic diagram of the power mechanism provided by the present invention;

[0022] Figure 3 It is a structural schematic diagram of the extension drive mechanism provided by the present invention;

[0023] Figure 4 yes Figure 3 A magnified schematic diagram of the local structure at point A in the middle;

[0024] Figure 5is a schematic structural diagram of a cross section of a tooth pad portion provided by the present invention;

[0025] Figure 6 yes Figure 5 A magnified schematic diagram of the local structure at point B in the middle;

[0026] Figure 7 is a front view of the flange provided by the present invention;

[0027] Figure 8 It is a right side view of the flange provided by the present invention.

[0028] In the figure, 1. flange; 2. tooth pad portion; 21. upper pad; 22. lower pad; 3. pharyngeal curvature; 31. spray nozzle; 32. video lens; 33. air blowing port; 34. upper curvature; 35. lower curvature; 351. first lower curvature subdivision; 352. second lower curvature subdivision; 4. guard portion; 41. upper guard subdivision; 42. lower guard subdivision; 421. hollow window; 422. power-assisting roller; 43. outer sleeve portion; 44. inner sleeve portion; 45. connector; 5. first lifting mechanism; 51. first bidirectional motor; 52. first X-shaped retracting coupling; 53. first return spring; 6. first flip drive mechanism; 61. second bidirectional motor; 62. first slide bar; 63. first slideway; 64. First reset spring; 7. Second flip drive mechanism; 71. Third bidirectional motor; 72. Second slide bar; 73. Second slideway; 74. Second reset spring; 8. Extension drive mechanism; 81. Fourth bidirectional motor; 82. Compression spring. DETAILED DESCRIPTION

[0029] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0030] like Figure 1-8 As shown, the present invention provides an oropharyngeal airway with airway surface anesthesia function. The oropharyngeal airway is an elliptical tubular structure, including a flange 1, a tooth pad 2 and a pharyngeal bend 3 arranged in sequence. A drug adding port is provided on the flange 1, and a drug spraying port 31 is provided in the inner cavity at the end of the pharyngeal bend 3. The drug adding port and the drug spraying port 31 are connected by a drug delivery pipeline buried in the flange 1, the tooth pad 2 and the pharyngeal bend 3.

[0031] As an optional embodiment of the present invention, a video lens 32 is further provided in the inner cavity at the end of the pharyngeal flexure 3 .

[0032] As an optional embodiment of the present invention, an air outlet 33 is further provided at the video lens 32 .

[0033] The oropharyngeal airway provided by the present invention has an anesthetic spray port 31 and a video camera 32 at the end of the curved portion. The drug injection port is connected to an anesthetic injection device, and the video camera 32 is connected to a video display. Medical personnel administer topical anesthesia to the patient's oropharynx and part of the airway based on the video information fed by the video camera. After anesthesia is established, tracheal intubation can be performed through the video camera 32. An air outlet 33 is connected to an external blower to blow air toward the camera (the spray port 31 is located downwind of the camera) to prevent liquid from sticking to the video camera 32.

[0034] Specifically, the flange 1 is an elliptical plate with a long diameter of 45mm, a wide diameter of 30mm, and a wall thickness of 5mm. An elliptical through hole with a long diameter of 25mm and a wide diameter of 10mm is opened in the middle of the flange 1; the inner diameter shape and size of the proximal end of the tooth pad part 2 are the same as the shape and size of the through hole in the middle of the flange 1, and it is fixedly connected to the middle of the flange 1. The wall thickness of the tooth pad part 2 is 3mm and the total length of the tooth pad part 2 is 25mm; the cross-section of the pharyngeal bend 3 is the same shape and size as the cross-section of the tooth pad part 2, and the length of the pharyngeal bend 3 is 70-80mm.

[0035] As an optional embodiment of the present invention, the tooth pad portion 2 includes an upper pad 21 and a lower pad 22, and interlayers are provided on both sides of the upper pad 21 and the lower pad 22, and the interlayers of the two are plugged into each other; a first lifting mechanism 5 is provided in the interlayer for adjusting the distance between the upper pad 21 and the lower pad 22.

[0036] As an optional embodiment of the present invention, the outer side of the tooth pad portion 2 is further covered with a flexible pad.

[0037] Specifically, after the upper pad 21 and the lower pad 22 are plugged in, there is a common hollow interlayer at the center of both sides, and the first lifting mechanism 5 is arranged in the common interlayer; the first lifting mechanism 5 includes a first bidirectional motor 51, a first transmission shaft, a first take-up wheel, a first steel wire, a first X-shaped contraction coupling and a first reset spring 53. There are two first X-shaped contraction couplings, which are respectively arranged in the common interlayer on both sides of the upper pad 21 and the lower pad 22. The contraction direction of the first X-shaped contraction coupling is consistent with the relative movement direction of the upper pad 21 and the lower pad 22; there are two first take-up wheels, which are fixedly arranged on the transmission shaft, and there are two first steel wires. The two ends of each first steel wire are respectively connected to a first take-up wheel and a first X-shaped contraction coupling; the first bidirectional motor 51 and the first transmission shaft are arranged in the flange 1, and the first bidirectional motor 51 The drive shaft is driven to rotate, thereby driving the two first X-shaped contraction couplings to contract synchronously; the two ends of the first reset tension spring 53 are connected to the first X-shaped contraction coupling, and under the elastic force of the first reset tension spring 53, the first X-shaped contraction coupling has a tendency to contract; a slide is provided in the upper pad 21 in the extension direction, and the upper end of the first X-shaped contraction coupling is hinged to the upper pad 21 on the side close to the flange 1, and a slider is provided on the side away from the flange 1 and is slidably connected to the slide provided in the upper pad 21; a slide is provided in the lower pad 22 in the extension direction, and the lower end of the first X-shaped contraction coupling is hinged to the flange 1 One side is hinged to the lower pad 22, and a slider is provided on the side away from the flange 1, which is slidably connected to the slideway provided in the lower pad 22; (the upper and lower ends of the first X-shrinkage coupling are hinged to the tooth pad on one side and slidably connected to the tooth pad, and the upper and lower end hinges are located on the same side of the first X-retraction connection, that is, on the side close to the flange 1 or on the side away from the flange 1) When the first take-up wheel reels in the wire, the first X-type retraction coupling is pulled and stretched. In order to ensure the smooth retraction and release process of the first steel wire, a guide wheel can also be provided in the internal space of the flange 1 to guide the first wire. A steel wire; under normal circumstances, the first X-shaped contraction coupling is in a contracted state, and the vertical connection overlap between the upper pad 21 and the lower pad 22 is the largest; the first bidirectional motor 51 drives the first take-up wheel, and the first steel wire pulls the first X-shaped contraction connection to extend, and the vertical spacing between the upper pad 21 and the lower pad 22 increases. At this time, the intubation operation is carried out. After the intubation is completed, the first take-up wheel pays off the wire, and the first X-shaped contraction coupling is shortened under the action of the tension spring. The first steel wire rope always remains in a straight state, and the speed at which the take-up wheel pays off the wire affects the shortening speed of the first X-shaped contraction coupling.

[0038] As an optional embodiment of the present invention, the pharyngeal curvature 3 includes an upper curvature 34 and a lower curvature 35, which are plugged into each other, with a common interlayer provided on both sides, and a first flipping drive mechanism 6 provided in the common interlayer, the proximal end of the upper curvature 34 is plugged into the distal end of the dental pad, and the proximal end of the lower curvature 35 is hinged to the distal end of the dental pad; the lower curvature 35 includes a first lower curvature division 351 and a second lower curvature division 352, the distal end of the first lower curvature division 351 is hinged to the proximal end of the second lower curvature division 352; a second flipping drive mechanism 7 is also provided between the second lower curvature division 352 and the upper curvature 34, which drives the second lower curvature 35 to flip downward compared to the first lower curvature 35.

[0039] As an optional embodiment of the present invention, the first lower curved section 351 includes a lower curved section A and a lower curved section B. The distal end of the lower curved section A and the proximal end of the lower curved section B are plugged into each other, a common interlayer is provided at the plug-in position, and an extension drive mechanism 8 is provided in the common interlayer.

[0040] Specifically, the plug-in structure between the upper curved portion 34 and the lower curved portion 35 is the same as the plug-in structure between the upper pad 21 and the lower pad 22; the first flip drive mechanism 6 includes a second bidirectional motor 61, a second transmission shaft, a second take-up wheel, a second steel wire, a first slide bar 62, a first slideway 63 and a first reset spring piece 64; the number of the first slide bar 62 and the first reset spring piece 64 is two, the diameter of the first slide bar 62 is 1-1.5mm, the first reset spring piece 64 is fixedly arranged at one end of the slide bar, the first reset spring piece 64 is embedded in the first upper curved division, the number of the first slide bar 62 is two, and it is obliquely arranged in the common interlayer between the first upper curved division and the first lower curved division 351 on both sides, the number of the first slideway 63 is two, and it is arranged in the first lower curved division 351, which matches the lower end of the first slide bar 62, and the first slideway 63 adopts an I-shaped slideway. The lower end is provided with an anti-slip slider, which only slides in the extension direction of the slide. The lower end of the first slide bar 62 is hinged to the anti-slip slider (the curvature of the anti-slip slider, the curvature of the first slide and the curvature of the curved part are the same), and the second steel wire is fixedly connected to the lower half of the first slide bar 62 (it can also be fixedly connected to the anti-slip slider). When the second steel wire is pulled forward, the lower end of the first slide bar 62 moves forward relative to the first slide way 63, the angle between the first slide bar 62 and the first upper curved section increases, and the first lower curved section 351 flips downward; the second bidirectional motor 61 is arranged in the flange 1, and the second take-up wheel is fixedly arranged on the second transmission shaft in two numbers. The second bidirectional motor 61 drives the transmission shaft to adjust the synchronous movement of the slide bars on both sides of the pharyngeal bend 3. The angle between the first reset spring piece 64 and the first slide bar 62 is an acute angle. After assembly is completed, the angle between the first reset spring piece 64 and the first slide bar 62 tends to decrease, and the first lower curved section 351 tends to flip upward under the action of the internal stress between the first reset spring piece 64 and the first slide bar 62; the second bidirectional motor 61 drives the second take-up shaft, and the second take-up wheel reels the second steel wire. The angle of the slide bar increases compared to the upper curved section 34, and the first lower curved section 351 flips downward, that is, the first lower curved section 351 presses the patient's tongue downward, expanding the patient's oral cavity to facilitate tracheal intubation by medical workers; when the second bidirectional motor 61 releases the wire, the first pharyngeal curved section gradually returns to its initial state under the action of the internal stress between the first reset spring piece 64 and the first slide bar 62. During the process of the second take-up wheel reeling in and out, the second steel wire always remains straight. In order to ensure the smooth progress of the second steel wire reeling and releasing process, a wire pulley can be added to adjust the transmission direction of the second steel wire. A similar second flipping drive mechanism 7 includes a third bidirectional motor 71 , a third transmission shaft, a third take-up wheel, a third steel wire, a second slide bar 72 , a second slideway 73 and a second reset spring 74 , and is arranged between the upper curved portion 34 and the second lower curved section 352 .

[0041] The extension drive mechanism 8 includes a fourth bidirectional motor 81, a fourth take-up wheel, a fourth steel wire and a compression spring 82. The fourth bidirectional motor 81 is fixedly arranged on the flange 1 to drive the fourth take-up shaft to rotate. One end of the fourth steel wire is fixedly connected to the fourth take-up shaft and the other end is fixedly connected to the lower curved section B. The compression spring 82 is arranged in the common interlayer of the lower curved section A and the lower curved section B so that the two have a tendency to move away from each other. When the fourth bidirectional motor 81 takes up the line, the lower curved section B moves in the direction close to the lower curved section A. When the fourth bidirectional motor 81 releases the line, the lower curved section B moves in the direction close to the lower curved section A. Under the action of 82, it moves in the direction away from the lower curved section A (the first slide 63 is arranged on the inner side of the lower curved section B, the connecting groove of the lower curved section A and the lower curved section B is arc-shaped, and its curvature is the same as the curvature of the lower curved section 35. When the extension drive mechanism 8 contracts and adjusts the lower curved section 35, it will not affect the stability of the first flip drive mechanism 6 and the second flip drive mechanism 7; to facilitate circuit installation, one end of the first bidirectional motor 51, the second bidirectional motor 61, the third bidirectional motor 71, and the fourth bidirectional motor 81 are exposed on the surface of the flange 1).

[0042] As an optional embodiment of the present invention, the oropharyngeal ventilation tube with airway surface anesthesia function also includes a protective part 4, which includes: an upper protective sub-part 41, a lower protective sub-part 42, an outer sleeve part 43 and an inner sleeve part 44; the upper protective sub-part 41 and the lower protective sub-part 42 are plugged into each other on both sides in the up and down directions and spliced into an elliptical tubular structure; the outer sleeve part 43 and the inner sleeve part 44 are flexible rubber tubes, and the distal end of the outer sleeve part 43 is fixedly connected to the outer side walls of the upper protective sub-part 41 and the lower protective sub-part 42, and the distal end of the inner sleeve part 44 is fixedly connected to the inner side walls of the upper protective sub-part 41 and the lower protective sub-part 42.

[0043] Specifically, a plug-in groove is provided in the middle of the end face of the proximal end of the upper protective section 41, and a matching plug-in protrusion is provided on the distal end face of the second upper curved section, and the plug-in groove and the plug-in protrusion are interference fit; a plug-in groove is provided in the middle of the end face of the proximal end of the lower protective section 42, and a matching plug-in protrusion is provided on the distal end face of the second lower curved section 352, and the plug-in groove and the plug-in protrusion are interference fit; before the protective section 4 is installed, the outer sleeve section 43 and the inner sleeve section 44 are curled into a ring shape before installation, and a pulling rope is provided at the ends of the two, and the outer sleeve section of the rope is pulled to 43. The inner sleeve portion 44 gradually unfolds, and the diameter of the outer sleeve portion 43 is equal to the outer diameter of the pharyngeal bend 3, and the proximal end of the outer sleeve is expanded to cover the end face of the flange 1 close to the patient's mouth. The diameter of the inner sleeve portion 44 is equal to the inner diameter of the pharyngeal bend 3, and at least two rubber rings are provided in the circumferential direction of the inner sleeve portion 44 to provide support for the inner sleeve portion 44 so that the inner sleeve portion 44 can be attached to the inner wall of the pharyngeal bend 3. All rubber rings are evenly arranged along the length direction of the inner sleeve portion 44; the protective portion 4 is a disposable replacement part, which can effectively prevent cross-infection between patients and realize the reuse of other components, effectively reducing the cost of use.

[0044] As an optional embodiment of the present invention, the lower protective section 42 is provided with a hollow window 421, and the spray port 31 sprays anesthetic drugs in two directions, downward and backward; the drug spraying in two directions facilitates medical staff to perform all-round anesthesia treatment on the patient's mouth.

[0045] As an optional embodiment of the present invention, a power-assisting roller 422 is provided below the lower protective section 42 . The extending direction of the power-assisting roller 422 is perpendicular to the extending direction of the lower protective section 42 , and the power-assisting roller 422 partially protrudes from the lower surface of the lower protective section 42 .

[0046] Specifically, the protective part 4 is also provided with a medicine inlet pipe and a blow pipe, the medicine outlet end of the medicine inlet pipe and the air outlet end of the blow pipe are fixedly connected to the proximal end of the upper protective section 41, and a card slot is provided on the outer edge of the flange 1. An insert is fixedly provided on the end of the medicine inlet pipe and the blow pipe away from the upper protective section 41. The number of the insert is 1, and they are fixedly connected to the medicine inlet pipe and the blow pipe at the same time. The insert matches the slot and the two are interference fit. A connector 45 is provided at the end of the medicine inlet pipe and the blow pipe near the insert. The medicine inlet pipe and the blow pipe are disposable and replaceable structures. The medicine inlet pipe and the blow pipe are routed from the outside of the tooth pad part 2 and the pharyngeal bend 3, and are covered inside the outer sleeve part 43. The outer edge of the flange 1 The card slot set along the edge is located on the side (left or right) of the flange 1, ensuring that the medicine inlet pipe and the air blowing pipe extend from the side of the tooth pad part 2 to the distal end, avoiding the patient's teeth biting (pressing) the medicine inlet pipe and the air blowing pipe during use; the flange 1, the upper pad 21, and the upper curved part 34 are integrally formed, and the circuit line of the video lens 32 is pre-buried inside the three. The video lens 32 protrudes from the upper curved part 34, and the proximal end of the upper curved part 34 is reserved for the video lens 32. The video lens 32 is inserted into the card slot reserved on the upper curved part 34 to shoot the situation inside the patient's mouth. The length of the upper curved part 34 is greater than that of the lower curved part 35. The video lens 32 and the medicine spray port 31 are Below the lower protective section 42 is a hollow window 421 corresponding to the video camera 32 and the spray port 31. The main body of the upper protective section 41 is made of hard plastic, with the outer surface and distal end made of flexible rubber. Multiple assist tubes can be provided, evenly spaced along the length of the lower curved section 35 to reduce resistance to the patient's tongue during use. To prevent the assist roller 422 from scratching the patient, safety blocks are provided at both ends of the assist roller 422. The safety blocks are fixedly connected to the lower curved section 35, with a gap between them. The upper protective section 41 is 20 mm long, with a 5 mm area at the distal end made of flexible rubber to reduce damage to the patient's throat during use. The remaining portion is made of hard plastic to ensure the mechanical strength of the connection.The outer surface and distal end of the upper protective section 41 are made of flexible rubber material to protect the patient's hard palate and prevent the protective section 4 from scratching or scratching the patient's hard palate during use. Similarly, the outer sleeve section 43 is made of a flexible rubber tube to cover the curved portion and also provides effective protection for the patient's hard palate. The lower protective section 42 is 35 mm long. The distal 5mm area is made of flexible rubber material, and the distal end of the lower protective division 42 can be made of flexible rubber material. The lower protective part 4 will not injure the patient during use when in contact with the patient's tongue, and the rest of the part is made of hard plastic; below the spray port 31, the hollow window 421 opened on the lower protective division 42 is rectangular with a length of 20mm and a width of 15mm. The length direction of the hollow window 421 is consistent with the extension direction of the lower protective division 42, and a diamond grid with a long diameter of 8mm and a wide diameter of 6mm is provided on the hollow window 421, and the width of the grid line is 1mm; the diameter of the power-assisting roller 422 is 2-3mm, and the shape of the power-assisting roller 422 is consistent with the shape of the outer surface of the lower protective division 42. Both ends of the power-assisting roller 422 are rotatably connected to the lower protective division 42 to ensure that the power-assisting roller 422 can rotate freely in the circumferential direction, and the power-assisting roller 422 protrudes 421mm from the lower protective division.

[0047] In the description of the present invention, it should be understood that the terms "upper", "lower", "proximal" and "distal" indicate directions or positional relationships based on the user being in a standing state (vertically, the user's tongue is located below the palate). When the oropharyngeal ventilation tube with airway surface anesthesia function involved in the present invention has been inserted, the direction close to the user's tongue is downward, the direction close to the user's palate is upward, the end close to the teeth is proximal, and the end close to the throat is distal. These are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0049] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An oropharyngeal ventilator with airway surface anesthesia function, the oropharyngeal ventilator is an elliptical tubular structure, comprising a flange, a tooth pad portion and a pharyngeal curvature portion arranged in sequence, characterized in that: The flange is provided with a medicine adding port, and the inner cavity at the end of the pharyngeal bend is provided with a medicine spraying port, and the medicine adding port and the medicine spraying port are connected by a medicine administering pipeline buried in the flange, the tooth pad part and the pharyngeal bend; A video camera is also provided in the inner cavity at the end of the pharyngeal curvature; The video lens is also provided with an air outlet; The dental pad includes an upper pad and a lower pad, and interlayers are provided on both sides of the upper pad and the lower pad, and the interlayers of the two are plugged into each other; a first lifting mechanism is provided in the interlayer for adjusting the distance between the upper pad and the lower pad; The outer side of the dental pad is also covered with a flexible pad; The pharyngeal curvature includes an upper curvature and a lower curvature, which are plugged into each other. The lower curvature includes a first lower curvature sub-section and a second lower curvature sub-section, and the distal end of the first lower curvature sub-section is hinged to the proximal end of the second lower curvature sub-section; a flipping drive mechanism is also provided between the second lower curvature sub-section and the upper curvature, which drives the second lower curvature sub-section to flip downward compared to the first lower curvature sub-section.

2. The oropharyngeal airway with airway surface anesthesia function according to claim 1, characterized in that: The first lower curved section includes an A lower curved section and a B lower curved section. The distal end of the A lower curved section and the proximal end of the B lower curved section are plugged into each other. A common interlayer is provided at the plugging point, and an extension drive mechanism is provided in the common interlayer.

3. The oropharyngeal airway with airway surface anesthesia function according to claim 1, characterized in that: The oropharyngeal ventilation tube with airway surface anesthesia function also includes a protective part, which includes: an upper protective sub-part, a lower protective sub-part, an outer sleeve part and an inner sleeve part; the upper protective sub-part and the lower protective sub-part are plugged into each other on both sides in the up and down directions and spliced into an elliptical tubular structure; the outer sleeve part and the inner sleeve part are flexible rubber tubes, and the distal end of the outer sleeve part is fixedly connected to the outer side walls of the upper protective sub-part and the lower protective sub-part, and the distal end of the inner sleeve part is fixedly connected to the inner side walls of the upper protective sub-part and the lower protective sub-part.

4. The oropharyngeal airway with airway surface anesthesia function according to claim 3, characterized in that: The lower protection section is provided with a hollow window, and the spray port sprays anesthetic drugs in two directions, downward and backward.

5. The oropharyngeal airway with airway surface anesthesia function according to claim 3, characterized in that: A power-assisting roller is provided below the lower protection section. The extending direction of the power-assisting roller is perpendicular to the extending direction of the lower protection section. The power-assisting roller partially protrudes from the lower surface of the lower protection section.

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