Inflatable expanding oropharyngeal airway

Abstract

The invention discloses an inflatable expanding oropharynx airway, which relates to the technical field of medical instruments and comprises a ventilation catheter, one end of the ventilation catheter is an insertion part inserted into the throat, the other end of the ventilation catheter is retained at a far end part outside the mouth, and a bending part is connected between the insertion part and the far end part. The insertion part, the bending part and the far-end part form a ventilation channel with a closed circumferential side wall and two open ends, expanding air bags are arranged on the upper side and the lower side of the bending part, the upper expanding air bag is expanded to abut against the upper jaw in the oral cavity, the lower expanding air bag is expanded to abut against the lingual surface in the oral cavity, and the upper expanding air bag and the lower expanding air bag form an expanding structure in the oral cavity. And a ventilation channel which is free in the oral cavity can be retained. According to the inflatable expanding oropharynx airway, the end of the airway enters the airway through the oral cavity, the upper expanding air bag and the lower expanding air bag form an expanding structure in the oral cavity, the expanding structure is used for fixing the airway free in the oral cavity, and the inflatable expanding oropharynx airway is suitable for establishing a temporary artificial airway in the oral cavity of an elderly patient with emaciation, posterior lingual drop and tooth missing.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, in particular to an inflatable expanding oropharyngeal airway. Background Art

[0002] The oropharyngeal airway is a hard, flat tube-type artificial airway made of elastic rubber or plastic. It is curved, with a curvature similar to that of the tongue and soft palate. It is easy to insert, can effectively prevent the tongue from falling back, quickly open the airway, and establish a temporary artificial airway.

[0003] The oropharyngeal airway, an oval hollow plastic tube commonly used in clinical practice and pre-hospital emergency care, is simple to operate and can quickly open the patient's airway without requiring an oral expansion device. However, for elderly patients with emaciation, tongue prolapse, or edentulousness, the portion of the oropharyngeal airway located within the oral cavity cannot be properly retained after entering the airway through the mouth, and can easily become loose in the mouth, hindering effective airway opening. Summary of the Invention

[0004] The object of the present invention is to provide an inflatable expanded oropharyngeal airway to solve the problems raised in the above background technology.

[0005] To solve the above technical problems, the present invention provides the following technical solutions: an inflatable expanded oropharyngeal airway, comprising a ventilation catheter, one end of which is an insertion portion inserted into the throat, the other end of which is retained at a distal end outside the mouth, a curved portion connected between the insertion portion and the distal end, the insertion portion, the curved portion, and the distal end forming a ventilation channel with a closed circumferential sidewall and open at both ends;

[0006] Expansion airbags are provided on the upper and lower sides of the curved portion. The upper expansion airbag expands and presses against the upper palate in the oral cavity, and the lower expansion airbag expands and presses against the tongue surface in the oral cavity. The upper and lower expansion airbags form an expanded structure in the oral cavity, thereby fixing the ventilation channel free in the oral cavity.

[0007] In a further embodiment, one end of the curved portion connected to the distal end portion is curved and raised upward;

[0008] One end of the bending portion connected to the inserting portion is bent downward.

[0009] In a further embodiment, placement grooves are provided on the upper and lower sides of the curved portion, and two expansion airbags are respectively fixed in the two placement grooves. The two expansion airbags are both connected to air guide tubes respectively embedded in the upper and lower inner walls of the distal end portion, and the end of one of the air guide tubes is connected to a connecting tube extending along the inner wall of the distal end portion and connected to the other air guide tube, and the end of the other air guide tube extends out of the end side wall of the distal end portion and is connected to an external inflatable component.

[0010] In a further embodiment, the external inflatable member includes a hollow joint connected to the end of the airway tube extending out of the distal end, and the radial outer wall of the hollow joint is connected to an inflation port.

[0011] In a further embodiment, a guide sleeve is fixed to the axial side wall of the hollow joint, a sealing push rod is slidably inserted in the guide sleeve, one end of the sealing push rod extends into the hollow joint and is fixed with a sealing plug, and the sealing plug can be inserted into the opening at the connection between the hollow joint and the air duct.

[0012] In a further embodiment, the guide sleeve and the sealing push rod are both rectangular structures.

[0013] In a further embodiment, the end of the sealing push rod away from the sealing plug extends out of the guide sleeve, and the end of the sealing push rod away from the sealing plug is provided with a threaded insertion groove, a pressure relief rod is threadedly inserted into the threaded insertion groove, a pressure relief channel is provided in the pressure relief rod, and openings at both ends of the pressure relief channel extend to radial side walls at both axial ends of the pressure relief rod respectively;

[0014] A pressure relief hole is provided on the radial side wall of one end of the sealing push rod located in the guide sleeve. The pressure relief rod is rotated and fed deep into the threaded inserting groove to connect one of the openings of the pressure relief channel.

[0015] A rubber sealing disk is fixed to one end of the pressure relief rod located in the threaded inserting groove, and the outer diameter of the rubber sealing disk is larger than the inner diameter of the threaded inserting groove.

[0016] In a further embodiment, the outer wall of the sealing push rod is also provided with a corrugated sealing rubber sleeve, the side wall at the intersection of the guide sleeve and the hollow joint is fixedly connected to the end of the corrugated sealing rubber sleeve, and the opening of the end of the corrugated sealing rubber sleeve shrinks and becomes smaller and fixedly fits with the outer wall of the pressure relief rod.

[0017] In a further embodiment, it is characterized in that the ventilation channel in the curved portion is gradually narrowed toward the insertion portion.

[0018] In a further embodiment, shielding baffles are provided on both upper and lower sides of the end of the distal end portion, and the two shielding baffles are located on the outer wall of the oral cavity and respectively rest against the upper and lower lips.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention is an inflatable expandable oropharyngeal airway, which is composed of an insertion portion, a curved portion and a distal portion to form an airway with a closed circumferential side wall and openings at both ends. One end of the airway enters the airway through the oral cavity, and the other end is located outside the oral cavity. Two upper and lower expansion air bags are used to form an expanded structure in the oral cavity to fix the airway free in the oral cavity, ensure that the airway is stable in the oral cavity, avoid the situation where the airway is free in the oral cavity and affect the effective opening of the patient's airway. The airway is suitable for establishing a temporary artificial airway in the oral cavity of elderly patients with emaciation, tongue prolapse, and missing teeth. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the main structure of an embodiment of the present invention;

[0022] Figure 2 A half-section diagram of the main structure of an embodiment of the present invention;

[0023] Figure 3 A half-section view of the expanded airbag after expansion according to an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the partial structure of an external inflatable member according to an embodiment of the present invention;

[0025] Figure 5 A cross-sectional view of the external inflatable structure according to an embodiment of the present invention

[0026] Figure 6 Schematic diagram of the pressure relief rod structure according to an embodiment of the present invention.

[0027] In the figure: 1. Ventilation catheter; 11. Shielding baffle; 12. Placement groove; 13. Insertion part; 14. Bending part; 15. Distal part; 2. Expanding airbag; 21. Air guide tube; 22. Connecting tube; 3. Hollow joint; 31. Inflation port; 32. Pressure relief rod; 321. Sealing push rod; 322. Pressure relief channel; 323. Rubber sealing disk; 33. Guide sleeve; 34. Corrugated sealing rubber sleeve; 35. Sealing plug. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] Embodiment, this embodiment provides an inflatable expansion oropharyngeal airway, including a ventilation tube 1, one end of the ventilation tube 1 is an insertion portion 13 inserted into the throat, the other end of the ventilation tube 1 is retained at the distal end 15 outside the mouth, a curved portion 14 is connected between the insertion portion 13 and the distal end 15, and the insertion portion 13, the curved portion 14 and the distal end 15 form a ventilation channel with a closed circumferential side wall and open at both ends, such as Figure 1 and Figure 2 As shown, one end of the ventilation channel enters the airway through the oral cavity, and the other end is located outside the oral cavity. An expansion airbag 2 is provided on both sides of the curved portion 14. The expansion airbag 2 in the inflated state is as shown in FIG. Figure 3 The structure shown utilizes two upper and lower expansion balloons 2 to form an expanded structure within the oral cavity, securing the ventilation channel free within the oral cavity and ensuring its stability. This prevents the channel from floating freely within the oral cavity, hindering effective airway opening. This makes it suitable for establishing a temporary artificial airway in the oral cavity of elderly patients with emaciation, tongue prolapse, and edentulous patients.

[0030] Furthermore, it should be noted that the end of the bending portion 14 connected to the distal portion 15 is bent upward and bulged, and the end of the bending portion 14 connected to the insertion portion 13 is bent downward, as shown in FIG. Figure 1 As shown, one end of the curved portion 14 is curved and raised, and the other end is curved and extended, which can well match the physiological structure from the human mouth to the throat, so that the ventilation channel can smoothly enter the throat.

[0031] Furthermore, the ventilation channel in the curved portion 14 is gradually narrowed toward the inserting portion 13, as shown in FIG. Figure 1 As shown, by performing the closing setting, it is prevented that the insertion portion 13 occupies too much space in the throat when inserted into the throat, and contacts with the throat tissue, causing discomfort.

[0032] At the same time, in order to prevent the distal portion 15 from being embedded in the oral cavity, causing the patient to accidentally swallow the ventilation channel and causing a medical accident, shielding baffles 11 are provided on the upper and lower sides of the distal portion 15. The two shielding baffles 11 are located on the outer wall of the oral cavity and respectively rest on the upper and lower lips to ensure that the distal portion 15 is always outside the oral cavity, which neither affects the establishment of the temporary ventilation channel nor avoids accidental swallowing.

[0033] The specific expansion process of the expansion airbag 2 is as follows Figure 2 、 Figure 3 and Figure 4As shown, placement grooves 12 are provided on both the upper and lower sides of the curved portion 14, and two expansion airbags 2 are respectively fixed in the two placement grooves 12. The two expansion airbags 2 are connected to air guide tubes 21 respectively embedded in the upper and lower inner walls of the distal portion 15. The end of one of the air guide tubes 21 is connected to a connecting tube 22 extending along the inner wall of the distal portion 15 and communicating with the other air guide tube 21. The end of the other air guide tube 21 extends out of the end side wall of the distal portion 15 and is connected to an external inflatable member. Specifically, as shown in FIG. Figure 5 As shown, the external inflatable component includes a hollow connector 3 connected to the end of the airway tube 21 extending from the distal end 15, and an inflation port 31 is connected to the radial outer wall of the hollow connector 3. A temporary inflation path is established with the external inflatable component using an inflation device, such as an air pump or an air pump whose outlet end is connected to the inflation port 31 of the hollow connector 3, to inflate the airway tube 21 extending from the distal end 15. The gas is transmitted along the airway tube 21 and enters the corresponding expansion airbag 2. At the same time, the gas is inflated into the other expansion airbag 2 through the connecting tube 22. The two expansion airbags 2 are inflated synchronously to expand their internal volumes. The upper expansion airbag 2, after being inflated, expands and presses against the upper palate in the oral cavity, while the lower expansion airbag 2, after being inflated, expands and presses against the tongue surface in the oral cavity, thereby preventing the ventilation channel from shaking and becoming unstable in the oral cavity, which would affect the smooth construction of the temporary ventilation channel.

[0034] Expander balloon 2 is an ultra-thin polyurethane balloon with a thin wall thickness of only 7μm, one-seventh that of a typical PVC balloon. Even when underinflated, it is less likely to wrinkle. When deflated, it fits snugly against the curved portion 14, occupying minimal space and preventing obstruction to the ventilation channel's smooth insertion into the oral cavity and into the throat.

[0035] After the expansion airbag 2 is inflated, the inflation device and the inflation port 31 of the hollow joint 3 need to be separated, and the gas inside the expansion airbag 2 will be deflated. In order to prevent the expansion airbag 2 from being deflated, Figure 4 and Figure 5As shown, a guide sleeve 33 is fixed on the axial side wall of the hollow joint 3, and a sealing push rod 321 is slidably inserted in the guide sleeve 33. One end of the sealing push rod 321 extends into the hollow joint 3 and is fixed with a sealing plug 35. The sealing plug 35 can be inserted into the opening at the connection between the hollow joint 3 and the air guide tube 21. After the expansion airbag 2 is inflated, before separating the inflation device from the inflation port 31 of the hollow joint 3, the sealing push rod 321 is pushed along the axial direction of the guide sleeve 33, and the sealing push rod 321 is slid along the axial direction of the guide sleeve 33, so that the end of the sealing push rod 321 located in the hollow joint 3 slides toward the opening at the connection between the hollow joint 3 and the air guide tube 21 until the sealing plug 35 is completely inserted into the opening at the connection between the hollow joint 3 and the air guide tube 21. Before pulling out the inflation device, the expanded expansion airbag 2 can be sealed, and then the inflation device can be pulled out. In this way, the air bag 2 after expansion can be prevented from leaking and shrinking, which would affect the retention stability of the ventilation channel in the oral cavity.

[0036] Clinically, when the expansion airbag 2 is expanded, the expansion airbag 2 is often over-expanded due to untimely stopping of inflation. Therefore, it is necessary to perform a pressure relief operation on the over-expanded expansion airbag 2, such as Figure 5 and Figure 6 As shown, the end of the sealing push rod 321 away from the sealing plug 35 is extended out of the guide sleeve 33, and the end of the sealing push rod 321 away from the sealing plug 35 is provided with a threaded insertion groove, and a pressure relief rod 32 is threadedly inserted into the threaded insertion groove. A pressure relief channel 322 is provided in the pressure relief rod 32, and the openings at both ends of the pressure relief channel 322 extend to the radial side walls of the axial ends of the pressure relief rod 32 respectively; a pressure relief hole is provided on the radial side wall of the end of the sealing push rod 321 located in the guide sleeve 33. When relieving pressure, it is only necessary to rotate the pressure relief rod 32 to release the pressure. The pressure rod 32 rotates and feeds deep within the threaded slot, connecting one of the openings in the pressure relief channel 322. This connects the interior of the guide sleeve 33, the pressure relief channel 322, and the outside air. Through the opening at the connection between the hollow joint 3 and the air guide tube 21, the high-pressure gas within the expanded airbag 2 can be reversed back into the guide sleeve 33 and then discharged to the outside through the pressure relief channel 322. This not only achieves pressure relief, but also allows pressure relief to be performed without removing the inflator, making the pressure relief operation simple and quick. Furthermore, both the guide sleeve 33 and the sealing push rod 321 are rectangular in structure. This design ensures that the rectangular sealing push rod 321 and the guide sleeve 33 can only slide and adjust relative to each other, rather than rotating. This prevents the sealing push rod 321 from rotating synchronously with the pressure relief rod 32 when the pressure relief rod 32 is rotated.

[0037] In order to avoid air leakage without pressure relief, a rubber sealing disc 323 is fixed to one end of the pressure relief rod 32 located in the threaded slot. The outer diameter of the rubber sealing disc 323 is larger than the inner diameter of the threaded slot. Figure 6 As shown, by providing a rubber sealing disk 323 that fits tightly against the inner radial side wall of the threaded inserting groove, air leakage is avoided when the pressure relief channel 322 is not connected to the pressure relief hole.

[0038] Here, the sealing plug 35 is made of rubber material with anti-slip properties, and the sealing plug 35 is over-fitted with the opening at the connection between the hollow joint 3 and the air duct 21. Therefore, when the sealing push rod 321 is pressed hard, the sealing plug 35 will be tightly inserted into the opening at the connection between the hollow joint 3 and the air duct 21 and sealed. Without pulling the sealing push rod 321 in the opposite direction, the sealing plug 35 will not separate from the opening at the connection between the hollow joint 3 and the air duct 21, thereby avoiding accidental leakage of the expanded airbag 2.

[0039] At the same time, a corrugated sealing rubber sleeve 34 is also sleeved on the outer wall of the sealing push rod 321. The side wall of the intersection of the guide sleeve 33 and the hollow joint 3 is fixedly connected to the end of the corrugated sealing rubber sleeve 34. The opening of the end of the corrugated sealing rubber sleeve 34 shrinks and becomes smaller and is fixedly fitted with the outer wall of the pressure relief rod 32. As the corrugated sealing rubber sleeve 34 moves with the pressure relief rod 32, it will stretch and lengthen, and will not affect the sealing performance of the hollow joint 3 when the inflation device is connected to the inflation port 31. The end of the pressure relief rod 32 extending out of the threaded insertion groove is a hemispherical structure, such as Figure 6 As shown, it is convenient for medical personnel to rotate the pressure relief lever 32 with one hand.

[0040] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An inflatable oropharyngeal airway, characterized in that: The invention comprises a ventilation catheter (1), one end of which is an insertion portion (13) inserted into the throat, the other end of which is retained at a distal portion (15) outside the mouth, a curved portion (14) being connected between the insertion portion (13) and the distal portion (15), and the insertion portion (13), the curved portion (14) and the distal portion (15) forming a ventilation channel with a closed circumferential side wall and openings at both ends; The curved portion (14) is provided with expansion airbags (2) on both upper and lower sides. The upper expansion airbag (2) is expanded in the oral cavity and pressed against the upper palate, and the lower expansion airbag (2) is expanded in the oral cavity and pressed against the tongue surface. The upper and lower expansion airbags (2) form an expansion structure in the oral cavity, thereby fixing the ventilation channel free in the oral cavity.

2. The inflatable oropharyngeal airway according to claim 1, characterized in that: One end of the bending portion (14) connected to the distal end portion (15) is bent and raised upward; One end of the bending portion (14) connected to the insertion portion (13) is bent downward.

3. The inflatable oropharyngeal airway according to claim 1, characterized in that: The curved portion (14) is provided with placement grooves (12) on both upper and lower sides, and two expansion air bags (2) are respectively fixed in the two placement grooves (12). The two expansion air bags (2) are both connected to air guide tubes (21) respectively embedded in the upper and lower inner walls of the distal portion (15). The end of one of the air guide tubes (21) is connected to a connecting tube (22) extending along the inner wall of the distal portion (15) and connected to the other air guide tube (21). The end of the other air guide tube (21) extends out of the end side wall of the distal portion (15) and is connected to an external inflatable member.

4. The inflatable oropharyngeal airway according to claim 3, characterized in that: The external inflatable member comprises a hollow joint (3) connected to the end of the air guide tube (21) extending out of the distal end (15), and a radial outer wall of the hollow joint (3) is connected to an inflatable port (31).

5. The inflatable oropharyngeal airway according to claim 4, characterized in that: A guide sleeve (33) is fixed on the axial side wall of the hollow joint (3), a sealing push rod (321) is slidably inserted in the guide sleeve (33), one end of the sealing push rod (321) extends into the hollow joint (3) and is fixed with a sealing plug (35), and the sealing plug (35) can be inserted into the opening at the connection between the hollow joint (3) and the air guide tube (21).

6. The inflatable oropharyngeal airway according to claim 5, characterized in that: The guide sleeve (33) and the sealing push rod (321) are both rectangular structures.

7. The inflatable oropharyngeal airway according to claim 5, characterized in that: One end of the sealing push rod (321) away from the sealing plug (35) extends out of the guide sleeve (33), and one end of the sealing push rod (321) away from the sealing plug (35) is provided with a threaded insertion groove, a pressure relief rod (32) is threadedly inserted in the threaded insertion groove, a pressure relief channel (322) is provided in the pressure relief rod (32), and openings at both ends of the pressure relief channel (322) extend to radial side walls at both axial ends of the pressure relief rod (32); A pressure relief hole is provided on the radial side wall of one end of the sealing push rod (321) located in the guide sleeve (33); the pressure relief rod (32) is rotated and fed along the depth of the threaded inserting groove to connect one of the openings of the pressure relief channel (322); A rubber sealing disk (323) is fixed to one end of the pressure relief rod (32) located in the threaded inserting groove, and the outer diameter of the rubber sealing disk (323) is larger than the inner diameter of the threaded inserting groove.

8. The inflatable oropharyngeal airway according to claim 5, characterized in that: The outer wall of the sealing push rod (321) is also sleeved with a corrugated sealing rubber sleeve (34); the side wall at the intersection of the guide sleeve (33) and the hollow joint (3) is fixedly connected to the end of the corrugated sealing rubber sleeve (34); the end opening of the corrugated sealing rubber sleeve (34) shrinks and becomes smaller and is fixedly fitted to the outer wall of the pressure relief rod (32).

9. The inflatable oropharyngeal airway according to claim 1, characterized in that: The ventilation channel in the curved portion (14) is gradually narrowed toward the insertion portion (13).

10. The inflatable oropharyngeal airway according to claim 1, characterized in that: The distal end (15) is provided with shielding baffles (11) on both upper and lower sides of the end, and the two shielding baffles (11) are located on the outer wall of the oral cavity and respectively abut against the upper and lower lips.

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