An oropharyngeal airway

Abstract

The utility model discloses an oral pharyngeal airway belongs to oral pharyngeal airway technical field, include: the tubular body is by the curved insertion part and the straight bite mouth part constitutes a hollow tubular, and the end of bite mouth part is formed with an external interface that communicates with its inside, the insertion part, bite mouth part and external interface integrated into one piece are made, air bag, install at the inside camber surface of insertion part, and be located insertion part away from bite mouth part one end, through the inflation of air bag, and the air bag of positive is filled further support and separate the root of the tongue, open the gap of the root of the tongue and the posterior pharyngeal wall, increase the ventilation effect, because air bag is only located the root of the tongue side, and the other three face no air bag close, this part of gap still can carry out partial ventilation, furthermore, when needing sputum suction, the sputum suction tube can pass through the side and go deep into the throat deep part suction.

Description

Technical Field

[0001] This utility model relates to the field of oropharyngeal airway technology, and in particular to an oropharyngeal airway. Background Technology

[0002] Currently, in oropharyngeal airways with cuffs, inflation volume monitoring mainly relies on rough estimations based on human experience, making it difficult to accurately determine the degree of cuff inflation. High cuff inflation pressure may compress surrounding tissues and cause ischemia, while low cuff pressure may prevent the space between the tongue base and pharynx from opening, leading to ventilation difficulties.

[0003] In addition, the current airbag uses a whole-circle structure, which may block the suction tube from reaching the deep throat when the airbag is inflated. Moreover, when the oropharyngeal airway is closed by the airbag, it may block the ventilation that could originally be carried out through the gaps around the oropharyngeal airway. Utility Model Content

[0004] This utility model provides an oropharyngeal airway to solve the problems in the prior art.

[0005] The present invention adopts the following technical solution: an oropharyngeal airway, comprising: a tube body, which is a hollow tube formed by a curved insertion part and a straight bite part, and an external interface communicating with the interior is formed at the end of the bite part, wherein the insertion part, the bite part and the external interface are integrally formed; and an air bladder, which is installed on the inner arc surface of the insertion part and located at the end of the insertion part away from the bite part.

[0006] Preferably, the ventilation duct further includes an air volume indicator mechanism, which has at least a transparent indicator tube and a float that is slidably fitted with the indicator tube along its axial direction. One end of the indicator tube is connected to the airbag via an air tube. When the air volume inside the airbag changes, the gas pushes the float to move within the indicator tube through the air tube.

[0007] Preferably, the inside of the indicator tube is divided into two independent cavities by a float, wherein the cavity located on the side of the float away from the air tube is filled with gas at a pressure higher than standard atmospheric pressure.

[0008] Preferably, the inside of the indicator tube is divided into two independent cavities by an elastic membrane, and the float is located in the cavity inside the elastic membrane; when the airbag is inflated, the pressure in the cavity connected to the airbag increases, the elastic membrane protrudes out of the outer cavity, and drives the float to move.

[0009] Preferably, the gas volume indicator further includes a valve installed at the other end of the indicator tube and a connecting pipe coaxially disposed inside the indicator tube. The connecting pipe slides through the float and is in sealed contact with it. One end of the connecting pipe is installed on the valve, and the other end of the connecting pipe is connected to the gas pipe.

[0010] Preferably, the outer peripheral wall of the indicator tube is provided with at least two spaced indicator marks, and when the float is located between the two indicator marks, the air pressure inside the airbag is in an ideal state.

[0011] Preferably, the gas volume indicator further includes a branch pipe installed on and connected to the gas pipe, and a valve is installed at the air inlet of the branch pipe.

[0012] Preferably, the bending angle of the insertion portion relative to the bite portion is between 130° and 150°.

[0013] Preferably, the outer peripheral surface of the bite portion is thickened and the connection with the insertion portion is curved.

[0014] Preferably, the opening surface of the tube insertion end is larger than the opening surface of the external interface.

[0015] Preferably, the external interface can be connected to a ventilator threaded tube, and the ventilation effect of the oropharyngeal airway can be monitored through the ventilator.

[0016] The above-mentioned technical solutions adopted in the embodiments of this utility model can achieve the following beneficial effects:

[0017] Firstly, if poor ventilation occurs because the gap between the tongue root and the posterior pharyngeal wall is not opened after the oropharyngeal tube is placed in the oropharynx, the air bladder can be inflated. The inflated air bladder on the front further supports and separates the tongue root, opening the gap between the tongue root and the posterior pharyngeal wall and increasing the ventilation effect.

[0018] Secondly, since the air bladder is only located on the side of the tongue base, and the other three sides are not sealed by air bladders, this gap can still allow for partial ventilation.

[0019] Third, when suctioning is needed, the suction tube can be inserted deep into the throat through the side to draw phlegm.

[0020] Fourth, during the inflation or deflation of the airbag, as the amount of air inside the airbag increases or decreases, the gas enters or exits the indicator tube through the trachea, thereby pushing the float to rise or fall accordingly within the indicator tube. By observing the position of the float within the indicator tube, the user can clearly know whether the airbag inflation status is appropriate, avoiding excessive inflation pressure, which helps ensure the patient's ventilation effect and comfort.

[0021] Fifth, the outer diameter of the external interface conforms to the corresponding medical equipment standards, and can be tightly connected with other common respiratory equipment (such as anesthesia machine / ventilator threaded tube, artificial nose, etc.). The ventilation volume through the oropharyngeal airway can be monitored through the anesthesia machine / ventilator, which is convenient for evaluating the ventilation effect. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0023] Figure 1 This is a three-dimensional structural diagram of the oropharyngeal airway installation and artificial nose of this utility model;

[0024] Figure 2 This is a perspective view of the present utility model;

[0025] Figure 3 This is a cross-sectional view of the present invention;

[0026] Figure 4 This is a perspective view of the gas volume indicator mechanism of this utility model;

[0027] Figure 5 This is a schematic diagram of one embodiment of the gas volume indicator mechanism of this utility model;

[0028] Figure 6 This is a schematic diagram of a second embodiment of the gas volume indicator mechanism of this utility model;

[0029] Figure 7 This is a schematic diagram of a third embodiment of the gas volume indicator mechanism of this utility model.

[0030] Figure Labels

[0031] 1-Tube body; 11-Insertion part; 12-Biting part; 13-External interface; 2-Airbag; 3-Air volume indicator mechanism; 31-Indicator tube; 311-Indicator mark; 32-Float; 33-Spring; 34-Valve; 35-Connecting tube; 36-Elastic membrane; 37-Branch tube; 4-Trachea; 5-Artificial nose. Detailed Implementation

[0032] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0033] The technical solutions provided by the various embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0034] Reference Figures 1 to 7 As shown, this embodiment of the utility model provides an oropharyngeal airway, which mainly includes a tube body 1 and an air sac 2.

[0035] Tube 1 is the main part of the oropharyngeal airway, that is, the part that extends into the user's mouth. As the main body of the entire oropharyngeal airway, tube 1 is the part that directly extends into the user's mouth. It is usually a slender hollow tube, and its shape is designed according to the physiological structure of the human mouth and pharynx. It often has a certain curvature to better fit the natural curve of the mouth and pharynx, reduce pressure and discomfort on surrounding tissues, and at the same time ensure that air can smoothly pass through tube 1 into and out of the respiratory tract.

[0036] For example, refer to Figures 2 to 3 As shown, the tube body 1 is a hollow tube formed by a curved insertion part 11 and a straight bite part 12, and an external interface 13 communicating with the interior is formed at the end of the bite part 12. The insertion part 11, bite part 12, and external interface 13 are integrally formed. The external interface 13 is located at the end of the bite part 12. It is also hollow, and its inner diameter is adapted to the other parts of the tube body 1 to ensure unobstructed gas flow. The outer diameter of the external interface 13 generally follows the corresponding medical device standards to facilitate tight connection with other common respiratory devices (such as simple respirators, anesthesia machine / ventilator threaded tubes, artificial nose 5, etc.). Its shape is mostly regular circle for easy docking operation. In some practical applications, the bending angle of the insertion part 11 relative to the bite part 12 is between 130° and 150° to conform to the curvature of the human throat.

[0037] In addition, compared with the detachable plug-in connection method, since the insertion part 11, the bite part 12 and the outer interface 13 are integrally molded, there are no problems such as looseness or gaps in the connection parts. The local thickening of the bite part ensures the structural strength and avoids the sealing problems that may occur when splicing different parts. At the same time, in terms of production process, it can be integrally injection molded, reducing the assembly steps.

[0038] The airbag 2 is installed on the inner arc surface of the insertion part 11 (medical rubber and other materials are commonly used, and special processes are used to ensure that it will not easily shift or fall off. For example, medical glue can be used, but the most common method is to use medical-grade nylon cable ties or soft silicone bandages to wrap around and bind the connection between the airbag and the oropharyngeal airway. The cable ties or bandages can be adjusted as needed to ensure that the airbag is installed firmly and to avoid excessive compression that could damage the airbag or airway. Cable ties are also low in cost and readily available). The airbag is located at the end of the insertion part away from the bite.

[0039] The main function of the cuff 2 is to inflate the oropharyngeal airway after it is placed in the oropharynx. Its purpose is to further open the space between the base of the tongue and the posterior pharyngeal wall, increasing ventilation and relieving airway obstruction. If poor ventilation occurs after the oropharyngeal tube is placed in the oropharynx due to the space between the base of the tongue and the posterior pharyngeal wall not opening, the cuff can be inflated. The inflated cuff, located on the front, further supports and separates the base of the tongue, opening the space between the base of the tongue and the posterior pharyngeal wall, thus increasing ventilation.

[0040] Furthermore, since the cuff is only located on the side of the tongue base, with the other three sides unsealed, partial ventilation is still possible in this gap. Additionally, when suctioning is needed, the suction catheter can be inserted deep into the throat via the side. Moreover, during cuff inflation and deflation, as the amount of air inside the cuff increases or decreases, gas enters or exits the indicator tube through the trachea, thus pushing the float up or down accordingly within the indicator tube. By observing the float's position within the indicator tube, the user can clearly determine whether the cuff inflation is appropriate, avoiding excessive inflation pressure and helping to ensure effective ventilation and user comfort.

[0041] In some practical applications, the ventilation duct also includes an air volume indicator 3, which has at least a transparent indicator tube 31 and a float 32 that is slidably fitted to the indicator tube 31 along its axial direction. One end of the indicator tube 31 is connected to the airbag 2 through an air pipe 4. When the air volume inside the airbag 2 changes, the gas pushes the float 32 to move within the indicator tube 31 through the air pipe 4.

[0042] The indicator tube 31 is transparent, allowing users to directly observe the internal float 32 from the outside. It has a specific length and inner diameter. The length is generally designed according to actual needs, clearly showing the range of movement of the float 32. The inner diameter is moderate, ensuring smooth sliding of the float 32 without making its movement too sensitive or sluggish, thus affecting observation and judgment. For example, its length may be around 5-10 cm, and its inner diameter in the range of 1-2 cm. One end of the indicator tube 31 is connected to the air bladder 2 via an air tube 4, forming a channel for gas flow. When the air volume inside the air bladder 2 changes, gas can enter the indicator tube 31 through the air tube 4, thereby propelling the float 32. This connection serves as an indicator of the inflation status of the air bladder 2.

[0043] The float 32 and the indicator tube 31 are in an axially sealed sliding fit. This means that the float 32 can slide freely along the axis of the indicator tube 31, while ensuring that the gas inside the indicator tube 31 does not leak out through the gap between the float 32 and the tube wall. The float 32 is usually cylindrical or other shapes that facilitate sliding. Its material density must be less than the density of the gas (usually air) filling the indicator tube 31, so that it can float and move within the indicator tube 31 under the propulsion of the gas. For example, it can be made of lightweight plastic or other materials. The size of the float 32 must be adapted to the inner diameter of the indicator tube 31, ensuring that it can slide smoothly within the tube while also allowing the movement to clearly reflect changes in the gas volume of the airbag 2.

[0044] During the inflation or deflation of the airbag 2, as the amount of air inside the airbag 2 increases or decreases, the gas enters or exits the indicator tube 31 through the air tube 4, thereby pushing the float 32 to rise or fall accordingly within the indicator tube 31. By observing the position of the float 32 within the indicator tube 31, the user can clearly know whether the inflation state of the airbag 2 is appropriate. For example, when the float 32 is within a certain scale range of the indicator tube 31, it means that the inflation amount of the airbag 2 can just provide good pressure support. If it exceeds or falls below this range, it indicates that the inflation amount may need to be adjusted.

[0045] In summary, the ingenious design of the air volume indicator mechanism 3 in this oropharyngeal airway allows medical staff to intuitively and conveniently judge the inflation status of the cuff 2 during use, which helps to improve the accuracy and safety of oropharyngeal ventilation operations and ensure the ventilation effect and user comfort of patients.

[0046] In some practical applications, when the float 32 is not compressed by the gas in the airbag 2 within the indicator tube 31, it needs to have a self-resetting function, which can be achieved by at least the following implementation methods.

[0047] One implementation method is referred to Figure 5As shown, the indicator tube 31 is divided into two independent cavities by a float 32. The cavity located on the side of the float 32 away from the air tube 4 is filled with gas at a pressure higher than standard atmospheric pressure. When the airbag 2 is inflated, the gas enters the indicator tube 31 through the air tube 4, pushing the float 32 away from the air tube 4. At this time, the cavity filled with high-pressure gas is further compressed, and its internal gas pressure increases accordingly. According to the ideal gas law, the increase in pressure will generate a reverse force, attempting to return the float 32 to its initial position. When the gas in the airbag 2 no longer exerts pressure on the float 32 (e.g., when the airbag 2 deflates or the gas pressure decreases), the gas in this cavity filled with high-pressure gas will use its own pressure to push the float 32 towards the air tube 4, thus achieving the self-resetting function of the float 32. This is similar to a compressed elastic chamber that, after the external pressure is removed, returns to its original shape by its own internal pressure, causing the float 32 to reset.

[0048] Compared to some complex mechanical reset structures, this design, which utilizes the gas pressure difference within the indicator tube 31 to achieve reset, is relatively simple. It eliminates the need for additional complex mechanical parts; simply setting the gas pressure within the indicator tube 31 and ensuring a good seal reduces the risk of malfunctions caused by wear or jamming of mechanical components, thus lowering manufacturing costs and maintenance difficulty.

[0049] The second implementation method is as follows: Figure 6 As shown, the indicator tube 31 is divided into two independent cavities by a float 32. A spring 33 is coaxially mounted inside the cavity on the side of the float 32 away from the air tube 4, and this spring 33 elastically abuts against the float 32. When the airbag 2 is inflated, gas enters the indicator tube 31 through the air tube 4 and pushes the float 32 away from the air tube 4. At this time, the float 32 compresses the spring 33, causing the spring 33 to undergo elastic deformation and store elastic potential energy. When the gas in the airbag 2 no longer exerts pressure on the float 32 (e.g., the airbag 2 deflates or the gas pressure decreases), the elastic potential energy stored in the spring 33 is released, generating a spring force towards the air tube 4, pushing the float 32 back to its original position, thus achieving the self-resetting function of the float 32. By selecting springs 33 with different stiffness coefficients, the magnitude of the restoring force of the float 32 can be easily adjusted.

[0050] The third implementation method is as follows: Figure 7 As shown, the inside of the indicator tube 31 is divided into two independent cavities by an elastic membrane 36, and the float 32 is located in the cavity inside the elastic membrane. When the airbag is inflated, the pressure in the cavity connected to the airbag increases, the elastic membrane protrudes outward into the outer cavity, and drives the float 32 to move. When the airbag is deflated, the elastic membrane resets and drives the float 32 to move to the initial position.

[0051] The air volume indicator 3 also includes a branch pipe 37 installed on and connected to the air pipe 4. An air valve 34 is installed at the air inlet of the branch pipe 37, and the air bag is inflated or deflated through the air valve 34.

[0052] In some practical applications, refer to Figures 4 to 6 As shown, the air volume indicator 3 also includes an air valve 34 (which is prior art, and its internal structure is not shown, but can be referred to in the prior art for tire inflation and deflation valves) installed at the other end of the indicator tube 31, and a connecting pipe 35 coaxially disposed inside the indicator tube 31. The connecting pipe 35 slides through the float 32 and is in sealed contact with it. One end of the connecting pipe 35 is installed on the air valve 34, and the other end of the connecting pipe 35 is connected to the air pipe 4.

[0053] One end of the connecting pipe 35 is installed on the valve 34, and the other end is connected to the air pipe 4, thus establishing a complete and stable gas communication channel. This allows the external air source to exchange gas with the airbag 2 through the valve 34, connecting pipe 35, and air pipe 4. Consequently, when the air volume of the airbag 2 changes, the gas can smoothly push the float 32 to move within the indicator pipe 31, ensuring that the air volume indicator mechanism 3 functions properly.

[0054] Furthermore, since the connecting pipe 35 passes through the float 32, it plays a guiding and stabilizing role in the sliding of the float 32 to a certain extent. This improves the accuracy and reliability of the air volume indicator mechanism 3.

[0055] Based on any of the above embodiments, the outer peripheral wall of the indicator tube 31 is provided with at least two spaced indicator marks 311, and when the float 32 is located between the two indicator marks 311, the air pressure inside the airbag 2 is in an ideal state.

[0056] In some practical applications, the connection between the trachea 4 and the airbag 2 is located on the side of the tube body 1 (e.g., Figure 2 This is to avoid irritating the oral cavity skin on the upper and lower sides. The distance between the airbag 2 and the insertion end of the tube 1 is 1 to 1.5 cm to ensure that the airbag 2 is in a suitable position when inflated.

[0057] In some practical applications, based on the aforementioned tube body 1, the outer peripheral surface of the bite portion 12 is thickened, and the connection point with the insertion portion 11 is curved (e.g., Figure 3 This enhances both strength and aesthetics.

[0058] In some practical applications, the opening surface of the insertion end of the tube 1 is larger than the opening surface of the external interface 13. When gas enters or exits the human airway through the tube 1, the larger opening surface of the insertion end allows the gas to enter the tube 1 more smoothly, as if widening the entrance passage. During inhalation, a large amount of outside air can rush into the tube 1 quickly, reducing the obstruction of gas flow caused by the narrow opening.

[0059] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An oropharyngeal airway, comprising: include: The tube body (1) is a hollow tube formed by a curved insertion part (11) and a straight bite part (12), and an external interface (13) communicating with the interior is formed at the end of the bite part (12). The insertion part, bite part and external interface are integrally formed. The airbag (2) is installed on the inner arc surface of the insertion part (11) and is located at the end of the insertion part away from the bite part.

2. An oropharyngeal airway as defined in claim 1, wherein, The ventilation channel also includes an air volume indicator (3), which has at least a transparent indicator tube (31) and a float (32) that is slidably fitted to the indicator tube (31) along its axial direction. One end of the indicator tube (31) is connected to the airbag (2) through an air tube (4). When the air volume inside the airbag (2) changes, the gas pushes the float (32) to move inside the indicator tube (31) through the air tube (4).

3. An oropharyngeal airway according to claim 2, wherein, The inside of the indicator tube (31) is divided into two independent cavities by a float (32). The cavity located on the side of the float (32) away from the air tube (4) is filled with gas at a pressure higher than the standard atmospheric pressure.

4. An oropharyngeal airway according to claim 2, wherein, The indicator tube (31) is divided into two independent cavities by an elastic membrane (36), and the float (32) is located in the cavity inside the elastic membrane. When the airbag is inflated, the pressure in the cavity connected to the airbag increases, the elastic membrane protrudes outward into the outer cavity, and drives the float (32) to move.

5. An oropharyngeal airway as defined in claim 2, wherein, The gas volume indicator (3) also includes a valve (34) installed at the other end of the indicator tube (31) and a connecting tube (35) coaxially disposed inside the indicator tube (31). The connecting tube (35) slides through the float (32) and is in sealed contact with it. One end of the connecting tube (35) is installed on the valve (34), and the other end of the connecting tube (35) is connected to the gas pipe (4).

6. An oropharyngeal airway according to any one of claims 2-4, wherein the airway is formed from a single piece of material. The outer peripheral wall of the indicator tube (31) is provided with at least two spaced indicator marks (311). When the float (32) is located between the two indicator marks (311), the air pressure inside the airbag (2) is in an ideal state.

7. An oropharyngeal airway as defined in claim 4, wherein, The gas volume indicator (3) also includes a branch pipe (37) installed on and connected to the gas pipe (4), and a valve (34) is installed at the air inlet of the branch pipe (37).

8. An oropharyngeal airway as defined in claim 1, wherein, The bending angle of the insertion part (11) relative to the bite part (12) is between 130° and 150°.

9. An oropharyngeal airway as defined in claim 1, wherein, The outer peripheral surface of the bite portion (12) is thickened and the connection with the insertion portion (11) is curved.

10. An oropharyngeal airway as defined in claim 1, wherein, The external interface is used to connect to the ventilator's threaded tubing.

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