CN214596728U

CN214596728U - Multifunctional oropharynx air duct

Info

Publication number: CN214596728U
Application number: CN202022978954.3U
Authority: CN
Inventors: 徐韬
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-08
Filing date: 2020-12-08
Publication date: 2021-11-05
Anticipated expiration: 2030-12-08

Abstract

The utility model provides a multi-functional oropharynx air vent, include: a ventilation tube having a proximal end and a distal end, the ventilation tube having an arcuate shape that mimics the anatomical curvature of the posterior wall of a human pharynx; and a flange plate disposed at a proximal end of the vent tube. The utility model discloses a multi-functional oropharynx air vent has inner arc side and outer arc side, is provided with on multi-functional oropharynx air vent's outer arc side and link up the groove, should link up the groove and extend to the distal end of breather pipe from the flange board always to run through the lateral wall of flange board and breather pipe. The utility model discloses a multi-functional oropharynx air vent, except possessing the function of traditional oropharynx air vent, can also be used for guiding the fiberoptic bronchoscope in order to carry out trachea cannula, it can alleviate the damage to people's oral mucosa and throat portion, shortens the intubate time, has improved the success rate of intubate, reduces the time of patient's oxygen deficiency. Therefore, the multifunctional oropharyngeal airway is more suitable for beginners who use a fiberoptic bronchoscope to perform tracheal intubation.

Description

Multifunctional oropharynx air duct

Technical Field

The utility model relates to the field of medical equipment in general, especially, relate to an have oropharynx air vent of scope (for example fiberoptic bronchoscope or fiberscope) guide function concurrently.

Background

The oropharyngeal airway is mainly used for patients with respiratory tract obstruction, is particularly frequently used for respiratory tract management of critically ill patients, and is a simple, effective and economic airway auxiliary appliance. More particularly, oropharyngeal airways are particularly suitable for patients with complete or partial upper airway obstruction or unconsciousness requiring bite blocks following induction of anesthesia. It is generally believed that the oropharyngeal airway is effective in improving ventilation and preventing the patient from becoming tightly occluded, thereby improving rescue efficiency.

In practice, the oropharyngeal airway is inserted from the mouth backwards into position, communicating the mouth with the pharynx. At the moment, the oropharyngeal airway can effectively open the airway in a very short time, so the oropharyngeal airway is a clinical rescue measure which is simple to operate and easy to master. In addition, vomit and secretion in the oral cavity and the respiratory tract can be cleared by inserting into the oropharynx air duct, so that the critical patients can keep the respiratory tract unobstructed. Furthermore, the oropharyngeal airway can also play a role in limiting the tongue tenesmus, thereby preventing asphyxia.

Traditional oropharynx air vent is cast structure, mainly includes the flange board and the fixed breather pipe that sets up on the flange board. The flange plate is used for blocking the outer side of the lip of the mouth of a patient, so that the patient is prevented from swallowing the ventilating pipe. The ventilation tube extends into the mouth of the patient and further down to the pharynx for assisting the patient in ventilation. The ventilation tube simulates the anatomical radian of the human pharyngeal backwall, so that the tongue can leave the pharyngeal backwall, and the ventilation failure or deficiency caused by tongue tenesmus is prevented.

In addition to the basic functions of the oropharyngeal airway described above, it is desirable to provide other functions. It is desirable that the oropharyngeal airway function as a guide, for example, when using a fiberbronchoscope for tracheal intubation.

The "trachea cannula" is a technique of placing a special endotracheal tube into the trachea through the glottis. The technology can provide optimal conditions for airway smoothness, ventilation and oxygen supply, respiratory tract suction, prevention of aspiration and the like, becomes an important measure in the process of general anesthesia, cardiopulmonary resuscitation and rescue of critical patients accompanied with respiratory dysfunction, and is one of the most widely, most effectively and most quickly applied means in respiratory tract management. In a word, the trachea cannula is the basic skill which must be mastered by medical staff, and plays a vital role in saving the life of a patient and reducing the fatality rate.

Endotracheal intubation is typically accomplished by inducing the patient to a state of tolerable intubation, and then exposing the epiglottis (or glottis) with a fiberoptic bronchoscope or laryngoscope. Different tracheal intubation according to the induction mode can be divided into two types, namely rapid induction intubation and conscious intubation. Rapid induction intubation is intubation of the trachea after the application of a panel of anesthetic inducing agents, particularly after loss of consciousness and muscle relaxation in the patient with neuromuscular blockers. An awake intubation is an endotracheal intubation performed by a patient while awake.

For patients with difficult trachea intubation or the conditions of airway obstruction, digestive tract obstruction, satiety, intolerance of deep anesthesia and the like, the quick induction intubation is not suitable, and the clear intubation is needed. Under the existing medical conditions, the quick induction intubation requires medical staff to complete the intubation quickly to avoid the hypoxia of a patient, and although the awake intubation requires a little loose time, the requirement on the intubation technique of the medical staff is higher, otherwise, the patient is suffered from great pain. Whether a rapid induction intubation tube or a clear-headed trachea intubation tube is adopted, under the condition that the conventional fiberbronchoscope is used for intubation, if patients with small airway opening degree, high larynx position, insufficient epiglottis exposure, oropharyngeal tumors and the like, and patients with limited backward bending such as cervical marrow injury, ankylosing spondylitis and the like are encountered, the situation that the fiberbronchoscope is not well exposed and even can not be placed in the conventional fiberbronchoscope is often caused, and the intubation is difficult. At this time, it is difficult to insert the endotracheal tube into a predetermined portion, often putting the patient in a dangerous situation of oxygen deficiency asphyxia.

The endotracheal tube can be guided by a guiding instrument such as a fiber bronchoscope or a fiber laryngoscope to complete intubation. However, these guiding devices, without suitable guiding means, are highly demanding on the intubator, requiring considerable skill and long training, and are often used for conscious intubation, and rarely for rapid induction intubation. It is therefore desirable to find a guide device that can reasonably and scientifically address difficult airways to facilitate intubation in a variety of situations. This is very important for saving the life of the patient and reducing the complications of the endotracheal intubation.

CN201798988U provides a tracheal intubation guide, which comprises an arc tube made of polymer transparent material and a positioning plate sleeved on the arc tube; the outer wall of one end of the arc-shaped pipe is provided with a plurality of annular clamping grooves, and the positioning plate is clamped in the annular clamping grooves; the tail end of the arc-shaped pipe is provided with a supporting sheet. The trachea cannula guide can be used as an auxiliary tool for medical staff to carry out trachea cannula on a patient, and can realize quick and accurate intubation no matter quick induction intubation or sober intubation, thereby relieving the pain of the patient. In addition, the device can also assist the fiberoptic bronchoscope examination, guide the intubation and the deep sputum aspiration sampling or treatment of the respiratory tract, and can also realize the function of the oropharyngeal airway. However, for structural reasons, such "endotracheal tube introducers" still present difficulties in operation, especially after the intubation guidance function is completed, and are difficult to remove easily.

CN206198429 discloses a novel oropharynx aeration device, which comprises a suit main body, fixed ear wings, an endoscope inlet, a cavity channel, an oxygen connecting pipe, an inflatable air bag and a side pipe. The device is convenient to fix, cannot fall out of the oral cavity, and avoids biting the endoscope; the endoscope has a guiding function, is quickly placed into the oral cavity along the endoscope channel, and is simple and convenient to operate; the left side is open, the operation of the bronchoscope is increased while the air passage has a guiding function, and the operation is from the mediastinum to one side of the mouth angle; the protective pad has the function of protecting mucous membranes of the oropharynx, and avoids the occurrence of mucous membrane damage of the entrance and exit cavities during operation; the oropharynx part is supported, the oropharynx air duct function is achieved, and the situation that the air duct is blocked due to glossodies and pharyngeal collapse is avoided; a mask on a bite block is omitted, the device is simplified, the entering depth of the endoscope is shortened, and the operation is convenient; the device can directly send high-concentration oxygen to the pharynx through a jet respirator or an anesthesia machine, changes spontaneous breathing into mechanical ventilation and achieves supraglottic ventilation; avoiding the collapse of the oropharynx or the hypoxia caused by apnea during anesthesia; the cuff adjusts the jet ventilation direction of the front section through inflation, so that more gas enters under the glottis to achieve the ventilation purpose; effective exhaled gas can be determined by measuring carbon dioxide by the side tube, so that the carbon dioxide residence in the sedation process is avoided being reduced; in emergency, the endoscope guide tube can be inserted into the endoscope channel, and the open ventilation is changed into the closed ventilation, so that the positive pressure ventilation effect is achieved. However, the purpose of this device is to facilitate the fixing, and therefore the problem of how to remove it quickly and easily is not considered.

CN203598325U discloses an oropharynx air duct, which comprises an orolip plate with a vent hole formed in the middle part, wherein the upper end of a vent pipe is connected with the vent hole, and the lower end of the vent pipe is provided with an oropharynx plate; the vent pipe is integrally arc-shaped, the lip plate is divided into a first lip plate and a second lip plate along the longitudinal center line, and the vent pipe connected with the lip plate is correspondingly divided into a first vent pipe wall and a second vent pipe wall; the side wall of the first lip plate opposite to the second lip plate is provided with an insertion plate, and the opposite side wall of the second lip plate is provided with a corresponding insertion groove. According to the patent document, the oropharyngeal airway provided by the utility model can guide the fiber bronchoscope to perform tracheal intubation more conveniently. After the fiber bronchoscope passes through the glottis of the patient, the tracheal catheter on the fiber bronchoscope can conveniently pass through the ventilation pipe of the oropharynx air duct by detaching the oropharynx air duct. The operation is more convenient, the low ventilation and oxygen deficiency of the patient during intubation can be avoided, the safety of the patient can be ensured, and the diagnosis and treatment of diseases can be facilitated. Although such oropharyngeal airways are removable, removal is still inconvenient and leaves room for improvement.

CN208319670U discloses an oropharynx air duct for a peroral tracheal cannula guided by a fiberoptic bronchoscope, which comprises a lip plate and a tube body; axial through holes are formed in the lip plate and the pipe body, and the axial through holes are communicated with each other to form an airflow channel; the lip plates form a first lip plate and a second lip plate; the tube body forms a first tube body and a second tube body; the first lip plate is fixedly connected with the first pipe body to form a main body part; the second lip plate is fixedly connected with the second pipe body to form a drawing part; the main body part is detachably connected with the drawing part; the drawing part moves along the length extension direction or the radial direction of the main body part to be assembled with or disassembled from the main body part. Particularly, the slots can be formed in the oropharynx air duct by disassembling the drawing part and the main body part, so that an extra insertion space is provided for the tracheal cannula and the fiberbronchoscope, and the operation is convenient to carry out. However, since an additional step of detaching the extraction portion from the main body portion is required, it is still inconvenient to use such an oropharyngeal airway to guide a fiberoptic bronchoscope for endotracheal intubation.

CN204655712U discloses a multi-functional oral cavity air duct, it includes oropharynx air duct, bite-block and latex connecting block, and wherein, oropharynx air duct one end is the gas outlet, and the latex connecting block is connected to the other end. On the oropharynx air duct was located to the bite-block, the latex connecting block was equipped with the opening of giving vent to anger, and this opening of giving vent to anger is greater than the diameter of oropharynx air duct. Importantly, the oropharynx air duct is of a left-right combined separable structure, can be inserted into a large-size tracheal catheter and a gastroscope, and can be taken out in a left-right split mode after the fiberbronchoscope is placed in, so that multiple purposes can be achieved. However, similar to the above-mentioned CN208319670U, since an additional step of separating the oropharyngeal airway is required, it is still inconvenient in handling.

CN201862110U discloses a tracheal intubation slot, which comprises an oropharyngeal airway and a handle. There is the fluting in the positive top of the whole body of oropharynx air vent, can imbed endotracheal tube, when going trachea cannula, can guarantee that endotracheal tube slides in the inslot, can make things convenient for trachea cannula groove to take out after the intubate succeeds, and the breach diameter in groove is 1cm, and the tail end has long 12 cm's handle to link to each other, when leading light stick and fiber bronchoscope to carry out trachea cannula, convenient adjustment direction. The tracheal intubation slot can conveniently guide a light bar and a fiberoptic bronchoscope to perform tracheal intubation by slotting on an oropharyngeal airway. However, in this structure, while the operation is facilitated to some extent, there are other problems. In particular, as seen in the drawings of CN201862110U (see fig. 1 of the present application), the slot in the oropharyngeal airway of the tracheal intubation slot is located on the inner arc side of the oropharyngeal airway, and therefore, it is not convenient to remove the tracheal intubation slot after intubation is completed. In addition, simply slotting the oropharyngeal airways easily causes hygiene problems, and also presents visibility, adjustability and accuracy problems in guiding the fiberoptic bronchoscope.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, an object of the utility model is to provide a simple structure, operation get up more convenient and more accurate multi-functional oropharynx air vent.

Another object of the present invention is to provide a multi-functional oropharyngeal airway that is hygienic and has improved visibility.

In order to achieve the above object, the utility model provides a multi-functional oropharynx air vent, include: a ventilation tube having a proximal end and a distal end, the ventilation tube having an arcuate shape that mimics the anatomical curvature of the posterior wall of a human pharynx; and a flange plate disposed at a proximal end of the ventilation tube, the multi-functional oropharyngeal airway having an inner arc side and an outer arc side. Wherein, a through groove is arranged on the outer arc side of the multifunctional oropharynx air passage, extends from the flange plate to the far end of the air pipe and penetrates through the flange plate and the side wall of the air pipe.

Preferably, an openable shielding structure is arranged on the through-opening, which shielding structure at least partially covers the through-opening.

Preferably, the shielding structure is two rubber sheets partially overlapping each other.

Preferably, the shielding structure is an adhesive tape at least partially covering the through slot.

Preferably, the distal end of the vent tube is bent further inwards by an angle a, which is between 5-50 deg. compared to a normal circular arc.

Preferably, the inward bend angle α is between 20 ° and 30 °.

Preferably, at least a part of the vent pipe is a circular pipe with a circular cross section.

Preferably, the mid and distal ends of the ventilation tube are configured as a tube having a diameter slightly larger than the associated structure of the corresponding fiberoptic bronchoscope.

Preferably, the outer side of the tube wall of the proximal end of the ventilation tube is formed into a circular or nearly circular oval structure.

Preferably, the width of the through groove is 0.5 to 2 cm.

The utility model discloses a multi-functional oropharynx air vent except possessing the function of traditional oropharynx air vent, can also be used for guiding the scope such as fiberoptic bronchoscope. Specifically, when the patient who meets difficult air flue (if the degree of openness is little, neck jaw portion is even, cervical vertebra disease etc.) need use the supplementary trachea cannula that carries on of fiber bronchoscope, the utility model discloses a multi-functional oropharynx air vent can regard as a guiding device, makes things convenient for fiber bronchoscope to find and fix a position the epiglottis to do benefit to and use the quick trachea cannula of fiber bronchoscope.

In addition, when the guiding device as the fiber bronchoscope intubate, the utility model discloses a multi-functional oropharynx air vent can alleviate the damage to people's oral mucosa and throat, shortens the intubate time, has improved the success rate of intubate, reduces the time of patient's oxygen deficiency. Therefore, the multifunctional oropharyngeal airway is more suitable for beginners who use a fiberoptic bronchoscope to perform tracheal intubation.

The utility model discloses an among the multi-functional oropharynx air vent, owing to seted up the through groove on oropharynx air vent's outer arc side, consequently be convenient for very much break away from oropharynx air vent from the fiberoptic bronchoscope for the operation becomes easier and convenient.

Since the shield structure may be arranged to cover the through-slot, the fiberoptic bronchoscope, when pushed from the mouth towards the epiglottis, passes through a substantially closed tubular structure throughout its course, so that the surface of the lens is not affected by saliva and the field of view is not obscured. Meanwhile, the shielding structure also ensures the sanitary condition inside the oropharynx air duct.

Due to the circular design of the airway tube portion, the epiglottis and esophagus can also be quickly positioned by slightly rotating the oropharyngeal airway for a few patients with non-aligned airway openings.

Drawings

FIG. 1 is a perspective view of a prior art tracheal cannula slot of CN 201862110U;

fig. 2 is a perspective view of a multi-functional oropharyngeal airway in accordance with a first embodiment of the present invention, with the blocking structure on the through-slot on the outer arc side of the oropharyngeal airway removed for clarity;

figure 3 is a rear view of a multi-functional oropharyngeal airway, in accordance with a first embodiment of the present invention;

FIG. 4 is a front cross-sectional view of the multi-functional oropharyngeal airway shown in FIG. 3;

FIG. 5 is a rear cross-sectional view of the multi-functional oropharyngeal airway shown in FIG. 3;

figure 6 is a rear view of a multi-functional oropharyngeal airway, in accordance with a second embodiment of the present invention; and

figure 7 is a schematic representation of various sub-figures showing the steps of using the inventive multifunctional oropharyngeal airway for an endoscopic-guided endotracheal tube.

Detailed Description

The preferred embodiments of the physiotherapy and sleep aid power device of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, like numbering represents like elements.

The description of the exemplary embodiments is intended to be read in connection with the accompanying drawings, which are to be considered part of the entire written description. In the description, relative terms such as "front," "back," "upper," "lower," "left," "right," "inner," "outer," "top" and "bottom" as well as derivatives thereof (e.g., "horizontal," "vertical," "downward," "upward"), and the like, are to be construed to refer to the orientation as then described or as shown in the drawing under discussion. These relative terms are for convenience of description and do not require that the apparatus be constructed or operated in a particular orientation. Terms concerning attachments, coupling and the like, such as "connected," "coupled," and "interconnected," refer to a relationship wherein structures are secured or attached to one another either directly or indirectly through intervening structures, as well as both removable or rigid attachments or relationships, unless expressly described otherwise. Additionally, the terms "comprises," "comprising," "includes," "including," and the like are intended to include but not be limited to the listed components or elements, i.e., there may be additional unspecified components or elements on top of the listed components or elements.

As shown in fig. 2, a multi-functional oropharyngeal airway 10 (hereinafter referred to as "oropharyngeal airway 10") according to a first embodiment of the present invention mainly includes a flange plate 1 and an airway tube 2. The snorkel 2 has a proximal end and a distal end. The flange plate 1 is arranged at the proximal end of the breather pipe 2 and is used for blocking the outer side of the lip of the mouth of a patient so as to prevent the patient from swallowing the breather pipe. The distal end of the ventilation tube 2 extends into the mouth of the patient and further down to the pharynx for assisting ventilation of the patient. The majority of the ventilation tube 2, except for a small segment adjacent the flange plate 1, is substantially arcuate, simulating the anatomical curvature of the human posterior pharyngeal wall, allowing the tongue to be moved away from the posterior pharyngeal wall, preventing the inability or lack of ventilation due to tongue tenesmus.

Oropharyngeal airway 10 has an inner arcuate side and an outer arcuate side. Unlike the conventional art, the through-groove 3 is provided on the outer arc side of the oropharyngeal airway 10. The through-groove 3 extends from the flange plate 1 to the distal end of the snorkel 2 and penetrates the side walls of the flange plate 1 and the snorkel 2. The width of the through slot 3 can be chosen as desired, for example 0.5-2 cm, preferably 1 cm. The oropharyngeal airway 10 is made more convenient to operate due to the outer arc side of the oropharyngeal airway 10 in which the through slot 3 is located, as will be described in detail below in connection with fig. 7.

As shown in fig. 3 to 6, in the oropharyngeal airway 10 according to the first embodiment of the present invention, a shielding structure (specifically, left and

right rubber sheets

4, 5 partially overlapping each other in this first embodiment) is provided on the through-groove 3. The shielding structure may at least partially cover the through slot 3 before and during guiding of the fiberbronchoscope with the oropharyngeal airway 10. Thus, the shielding structure can prevent body fluids such as saliva from entering the oropharyngeal airway 10 through the through slot 3. This avoids corresponding hygiene problems. Furthermore, as the fiberoptic bronchoscope is advanced from the mouth to the epiglottis, it travels all the way through a substantially closed tubular structure, so that the surface of the lens is not affected by saliva and the field of view is obscured.

After the guidance is substantially completed using oropharyngeal airway 10, a portion of the fiberoptic bronchoscope may be forced open by contact with

rubber flaps

4, 5. Thus, oropharyngeal airway 10 can be detached from the forward portion of the fiberoptic bronchoscope, facilitating advancement of the endotracheal tube.

Another special feature of the oropharyngeal airway 10 of the present invention is that the bending angle of the distal end (end) of the arc-shaped airway 2 is greater than that of a normal circular arc. As shown in fig. 1, the distal end of the snorkel 2 is bent further inwards by an angle a, which may be, for example, between 5-50, preferably between 20-30, compared to a normal circular arc. With such an inward bend angle α, oropharyngeal airway 10 is more compatible with difficult airway treatment angles, thereby allowing for better positioning of the epiglottis after the fiberbronchoscope has passed through oropharyngeal airway 10.

Another special feature of the oropharyngeal airway 10 of the present invention is that at least a portion of the airway tube 2 (which may be the entire airway tube 2) is a circular tube with a circular cross-section. In particular, the middle and distal portions of the ventilation tube 3 may be configured as a circular tube having a diameter slightly larger than the relevant structure of the corresponding fiberbronchoscope (the front bendable tubular structure of the fiberbronchoscope). This is more conducive to the passage of a fiberoptic bronchoscope within oropharyngeal airway 10. In addition, it helps to keep the fiberbronchoscope in the central position of the oropharyngeal airway, thereby facilitating intubation with the fiberbronchoscope.

Yet another difference of the oropharyngeal airway 10 of the present invention is that the outer side of the tube wall of the proximal portion (or called "bite-in portion") of the airway tube 2, which is close to the flange plate 1, is formed as a circular or near-circular oval structure. It will be appreciated that the outside of the tube wall of the bite portion may be thickened to form a circular or near circular oval configuration without changing the shape of the inside of the tube wall. This rounded or nearly rounded oval configuration facilitates a slight rotation between the patient's two rows of incisors to adjust the direction of the distal opening of the oropharyngeal airway 10 in the case of particularly difficult airways, as compared to prior art oval configurations.

Figure 6 shows an oropharyngeal airway 10' according to a second embodiment of the invention, which differs from the first embodiment described above in terms of the shielding structure. In particular, in this embodiment, the shielding structure is an adhesive tape 6 that at least partially covers the through slot of the oropharyngeal airway 10'. The adhesive tape 6 as a shielding structure can also prevent body fluids such as saliva from entering the oropharyngeal airway 10' through the through-slot. Thus, corresponding hygiene problems can be avoided, and the lens surface of the fiber bronchoscope is not affected by saliva so that the visual field becomes blurred.

After guidance is substantially completed using oropharyngeal airway 10', tape 6 may be peeled off by hand or forced free by contacting a portion of the fiberoptic bronchoscope with tape 6. Thus, oropharyngeal airway 10' can be detached from the forward portion of the fiberoptic bronchoscope, thereby facilitating advancement of the endotracheal tube.

Steps (a) to (e) of guiding a fiberbronchoscope for tracheal intubation using the oropharyngeal airway of the present invention will be described below with reference to fig. 7.

First, in step (a), the oropharyngeal airway 10 is properly positioned in the patient's mouth to the pharynx. Next, in step (b), the endotracheal tube 8 is sleeved on the fiberbronchoscope 7, and the fiberbronchoscope 7 is inserted through the oropharyngeal airway 10 to the pharyngeal outlet of the oropharyngeal airway 10, so that the epiglottis can be found and located by the fiberbronchoscope 7. Next, in step (c), the fiberbronchoscope 7 is advanced further, bypassing the epiglottis into the trachea. Next, in step (d), the fiberbronchoscope 7 is fixed, and the oropharyngeal airway 10 is taken out through the through-groove 3. In step (e), the endotracheal tube 8 is advanced into the trachea under the guidance of the fiberbronchoscope 7. Finally, the fiberbronchoscope 7 is withdrawn.

While the present invention has been described with reference to preferred embodiments, it will be understood by those skilled in the art that various equivalent changes and modifications may be made without departing from the spirit of the invention. For example, although the oropharyngeal airway is described as being a single piece integrally molded of plastic material, two or more pieces may be assembled as desired. Accordingly, the scope of the invention is not to be limited by the specific disclosure above, but is to be defined by the appended claims.

Claims

1. A multi-functional oropharyngeal airway, comprising:

a ventilation tube (2) having a proximal end and a distal end, the ventilation tube having an arcuate shape simulating the anatomical curvature of the posterior wall of a human pharynx; and

a flange plate (1) disposed at a proximal end of the vent tube,

the multifunctional oropharynx air duct is provided with an inner arc side and an outer arc side, and is characterized in that a through groove (3) is arranged on the outer arc side of the multifunctional oropharynx air duct, extends from the flange plate to the far end of the air duct and penetrates through the flange plate and the side wall of the air duct.

2. A multi-functional oropharyngeal airway as claimed in claim 1, characterised in that an openable shutter is provided on the through slot (3), which at least partially covers the through slot.

3. A multi-functional oropharyngeal airway as claimed in claim 2, characterised in that said shielding structure is two rubber sheets (4, 5) partially overlapping each other.

4. A multi-functional oropharyngeal airway as claimed in claim 2, characterised in that said shielding structure is an adhesive tape (6) at least partially covering said through slot.

5. A multi-functional oropharyngeal airway as claimed in claim 1, characterised in that the distal end of the airway tube (2) is bent further inwards by an angle α of between 5 ° and 50 ° compared to a normal circular arc.

6. A multi-functional oropharyngeal airway as claimed in claim 5, characterised in that said inward bending angle α is comprised between 20 ° and 30 °.

7. A multi-functional oropharyngeal airway as claimed in claim 1, characterised in that at least a part of the ventilation tube (2) is a circular tube with a circular cross-section.

8. A multi-functional oropharyngeal airway as claimed in claim 7, characterised in that the middle and distal ends of the airway tube (2) are configured as a circular tube with a diameter slightly larger than the relevant structure of the corresponding fiberoptic bronchoscope.

9. A multi-functional oropharyngeal airway as claimed in claim 7, characterised in that the outer side of the tube wall of the proximal end of the airway tube (2) is formed as a circular or near circular oval configuration.

10. The multifunctional oropharyngeal airway as claimed in any one of claims 1 to 9, characterized in that the width of the through slot is 0.5-2 cm.