Nasal administration device for otolaryngology

Abstract

The present application relates to the technical field of medical devices, in particular to a nasal administration device for ear-nose-throat and head-neck surgery, comprising an air filtering assembly and a powder administration assembly, the air filtering assembly comprises an activated carbon filter screen and an antibacterial filter screen, the activated carbon filter screen and the antibacterial filter screen are built-in in an air inlet pipe, the air inlet pipe is screw-connected to a joint, the powder administration assembly comprises a nozzle, the nozzle is screw-connected to a contraction pipe, the contraction pipe is integrally formed with the air inlet pipe, a sealing element is arranged between the contraction pipe and the nozzle, the nozzle is provided with a powder inlet pipe, a piston is arranged in the powder inlet pipe, the nozzle is communicated with a throat pipe, the throat pipe is connected to an expansion pipe, and a first eccentric hole is arranged at an outlet end of the expansion pipe. The present application adopts an eccentric design, so that the dry powder sprayed from the second eccentric hole is directed to the outside of the nasal cavity, the dry powder and airflow are prevented from impacting the nasal septum, and the spray is prevented from directly impacting the nasopharynx to cause irritation, so that the absorption effect of the dry powder reaches the best.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a nasal administration device for ear-nose-throat and head-neck surgery. BACKGROUND

[0002] Nasal administration refers to a method of administration via the nasal cavity, absorption through the nasal mucosa to exert local or systemic therapeutic or prophylactic effects. The total area of the nasal cavity is about 150 square millimeters, and the surface is covered by mucosa with a thickness of 2-4 millimeters. The nasal mucosa is rich in blood vessels and lymphatic vessels, and its unit blood flow is larger than that of muscles, brain and liver. After polypeptide drugs penetrate the nasal mucosa, they directly enter the circulatory system, avoiding the first-pass effect of the liver. There are four pairs of paranasal sinuses beside the nose, and their mucosa is continuous with the nasal mucosa, so drugs can be easily absorbed and diffused. The nasal cavity is part of the skull, with many small holes. The endothelium of the nasal cavity is like a sieve-shaped plate, and nerve bundles pass through these small holes, surrounded by cerebrospinal fluid. Therefore, part of the drug dropped into the nasal cavity can enter the cerebrospinal fluid, which may be a way to deliver drugs into the brain.

[0003] Nasal administration can quickly and effectively deliver drugs to the blood. However, existing nasal administration devices on the market are mostly suitable for liquid drug formulations, and they are not as effective as powder drugs because liquid formulations are often less stable and require certain storage requirements. Dry powder directly sprayed into the nasal cavity not only has the best absorption effect, but also is easier to store.

[0004] Therefore, it is of great technical and economic significance to develop a nasal administration device for ear-nose-throat and head-neck surgery with uniform, efficient and accurate powder delivery. SUMMARY

[0005] The present application aims to provide a nasal administration device for ear-nose-throat and head-neck surgery to solve the problems raised in the background.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solution: a nasal administration device for ear-nose-throat and head-neck surgery, comprising an air filtration assembly and a powder administration assembly, the air filtration assembly comprising an activated carbon filter screen and an antibacterial filter screen, the activated carbon filter screen and the antibacterial filter screen being built-in in an air inlet pipe, the air inlet pipe being screw-connected to a connecting pipe, the connecting pipe being in communication with the outlet end of an air pump, the powder administration assembly comprising a nozzle, the nozzle being screw-connected to a contraction pipe, the contraction pipe being screw-connected to the air inlet pipe, and a sealing element being arranged between the contraction pipe and the air inlet pipe, a piston being arranged in the powder inlet pipe, the piston being fixedly connected to a push rod, the nozzle being in communication with a throat pipe, the throat pipe being connected to an expansion pipe, and a first eccentric hole being arranged at the outlet end of the expansion pipe.

[0007] Preferably, a sealing ring is arranged between the connecting pipe and the air inlet pipe, the sealing ring is a ring-shaped silica gel with a notch, and the left and right halves of the sealing ring are completely embedded in the connecting pipe and the air inlet pipe respectively.

[0008] Preferably, the outer peripheral edges of the activated carbon filter screen and the antibacterial filter screen are fixedly connected with a filter frame, the filter frame abuts against the connecting pipe, the air inlet pipe is provided with a limiting ring which is integrally formed with the air inlet pipe, and a rubber ring is arranged between the limiting ring and the filter frame.

[0009] Preferably, the nozzle, the powder inlet pipe, the throat pipe and the expansion pipe are integrally formed, the taper hole angle of the converging pipe is 15-25°, the taper hole angle of the expansion pipe is 7-10°, and the length-to-inner diameter ratio of the throat pipe is 1.2-2:1.

[0010] Preferably, a nose protection rubber sleeve is expandedly arranged on the outer periphery of the expansion pipe, the nose protection rubber sleeve is provided with a second eccentric hole which is aligned with the first eccentric hole, the inner wall of the nose protection rubber sleeve is provided with an inner fold which is integrally formed with the nose protection rubber sleeve, and the outer wall of the expansion pipe is provided with an annular groove which is matched with the inner fold.

[0011] Preferably, the nose protection rubber sleeve is provided with an indicating groove which is in the shape of an arrow, the indicating groove is located on the side deviated from the vertical center of the nose protection rubber sleeve, and the indicating groove is coated with a red coating.

[0012] Preferably, the maximum diameter of the expansion pipe is 2 cm, and the distance between the center of the first eccentric hole and the vertical center of the expansion pipe is 2 mm.

[0013] Preferably, the sealing member is annular, the sealing member is provided with a first convex ring and a second convex ring which are integrally formed with the sealing member, the first convex ring is completely embedded in the air inlet pipe, the second convex ring is completely embedded in the converging pipe, and the middle part of the sealing member is provided with an intermediate ring which is integrally formed with the sealing member.

[0014] Preferably, the connection between the intermediate ring and the sealing member is processed by a transition circle, the air inlet pipe is provided with a first transition groove, the converging pipe is provided with a second transition groove, and the intermediate ring is embedded in the first transition groove and the second transition groove respectively.

[0015] Compared with the prior art, the present application has the following beneficial effects:

[0016] 1. The eccentric design can make the dry powder sprayed from the second eccentric hole towards the outside of the nasal cavity, prevent the dry powder and airflow from impacting the nasal septum, and prevent the spray from directly impacting the nasopharynx to cause irritation, so that the absorption effect of the dry powder reaches the best.

[0017] 2、The present application avoids mixing of toxic gas or particles into the dry powder by the activated carbon filter screen, and prevents infectious bacteria in the air from mixing into the dry powder by the antibacterial filter screen, thereby avoiding cross infection between patients;

[0018] 3、The present application gives the sealing piece a stepped structure by designing the first convex ring and the second convex ring, and further separates the gap between the air inlet pipe and the contraction pipe by the intermediate ring, thereby improving the air tightness of the equipment;

[0019] 4、The nose protection rubber sleeve is made of medical silicone, has soft texture and good skin friendliness, and is designed with inner folds on the inner wall of the nose protection rubber sleeve and an annular groove on the expansion pipe, so that the nose protection rubber sleeve is relatively stable with the expansion pipe, and the nose protection rubber sleeve will not easily slide off the expansion pipe;

[0020] 5、The present application gives the sealing piece a stepped structure by designing the first convex ring and the second convex ring, and further separates the gap between the air inlet pipe and the contraction pipe by the intermediate ring, thereby improving the air tightness of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural schematic view of the present application;

[0022] Figure 2 is Figure 1 is an enlarged structural schematic view of the middle A part;

[0023] Figure 3 is Figure 1 is an enlarged structural schematic view of the middle B part;

[0024] Figure 4 is Figure 1 is an enlarged structural schematic view of the middle C part;

[0025] Figure 5 is a structural schematic view of the sealing piece in the present application;

[0026] Figure 6 is a structural schematic view of the nose protection rubber sleeve in the present application.

[0027] In the figure: 1 is a joint, 2 is a connecting pipe, 3 is an air inlet pipe, 4 is an activated carbon filter screen, 5 is an antibacterial filter screen, 6 is a filter frame, 7 is a limiting ring, 8 is a rubber ring, 9 is a sealing ring, 10 is a nozzle, 11 is a contraction pipe, 12 is a powder inlet pipe, 13 is a throat pipe, 14 is an expansion pipe, 15 is a first eccentric hole, 16 is a sealing piece, 17 is a first convex ring, 18 is a second convex ring, 19 is an intermediate ring, 20 is a first transition groove, 21 is a second transition groove, 22 is a nose protection rubber sleeve, 23 is a second eccentric hole, 24 is an inner fold, 25 is an indicating groove, 26 is a piston, and 27 is a push rod. DETAILED DESCRIPTION

[0028] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present application.

[0029] Please refer to Figures 1 to 3 A nasal administration device for ear-nose-throat and head-neck surgery includes an air filtering assembly and a powder administration assembly. The air filtering assembly includes an activated carbon filter screen 4 and an antibacterial filter screen 5, which are built in an air inlet pipe 3. The air inlet pipe 3 is screw-connected to a connecting pipe 2, which is in communication with an outlet end of an air pump. The powder administration assembly includes a nozzle 10, which is screw-connected to a contraction pipe 11, which is screw-connected to the air inlet pipe 3. A sealing element 16 is arranged between the contraction pipe 11 and the air inlet pipe 3. A piston 26 is arranged in a powder inlet pipe 12, and the piston 26 is fixedly connected to a push rod 27. The nozzle 10 is in communication with a throat pipe 13, which is connected to an expansion pipe 14. The expansion pipe 14 is provided with a first eccentric hole 15 at an outlet end thereof.

[0030] The nozzle 10, the powder inlet pipe 12, the throat pipe 13 and the expansion pipe 14 are integrally formed. An angle of a tapered hole of the contraction pipe 11 is 15°, an angle of a tapered hole of the expansion pipe 14 is 10°, and a length-to-diameter ratio of the throat pipe 13 is 1.5:1. The nozzle 10, the contraction pipe 11, the throat pipe 13 and the expansion pipe 14 form a Venturi tube. According to the Venturi principle, the air pump provides a jet flow as power. The jet flow is jetted at high speed through the contraction pipe 11. The push rod 27 is pushed, and the push rod 27 pushes the piston 26, so that dry powder in the powder inlet pipe 12 is sent into the nozzle 10. The high-speed jet flow carries the dry powder in the throat pipe 13, and the dry powder enters the expansion pipe 14 and is jetted from the first eccentric hole 15.

[0031] A maximum diameter of the expansion pipe 14 is 2 cm, and a distance between a center of the first eccentric hole 15 and a vertical center of the expansion pipe 14 is 2 mm. A nose protection rubber sleeve 22 is expanded and connected to an outer periphery of the expansion pipe 14. The nose protection rubber sleeve 22 is provided with a second eccentric hole 23, which is aligned with the first eccentric hole 15. The nose protection rubber sleeve 22 is used to extend into a patient's nasal cavity. Due to the eccentric design, the dry powder jetted from the second eccentric hole 23 is directed to an outer side of the nasal cavity, and is not jetted on a nasal septum. Avoiding the nasal septum prevents the dry powder and the jet flow from causing nose bleeding, and prevents the jet flow from directly impacting a nasopharynx to cause irritation. The outer side of the nasal cavity is a region where mucosa of superior, middle and inferior turbinate attachment areas is rich, absorption is good, and irritation is minimal. The patient achieves the best absorption effect of the dry powder. The first eccentric hole 15 is a circular hole, the dry powder is not diffused outwardly, and the dry powder is not diffused to the nasopharynx.

[0032] The nasal sleeve 22 has an indicator groove 25, which is arrow-shaped and located on the side of the second eccentric hole 23 that is offset from the vertical center of the nasal sleeve 22. The indicator groove 25 is coated with a red coating. The indicator groove 25 allows the patient to easily align the second eccentric hole 23.

[0033] The nasal sleeve 22 is made of medical-grade silicone, which is soft, skin-friendly, and disposable. It cannot be reused to prevent cross-infection among patients. Figure 4 As shown, the inner wall of the nasal protector 22 has an inner fold 24, which is integrally formed with the nasal protector 22. The outer wall of the expansion tube 14 has an annular groove that matches the inner fold 24. When the nasal protector 22 is placed on the expansion tube 14, the inner fold 24 is embedded in the annular groove, which enhances the relative stability between the nasal protector 22 and the expansion tube 14, preventing the nasal protector 22 from easily slipping off the expansion tube 14.

[0034] like Figure 2 As shown, the outer edges of the activated carbon filter 4 and the antibacterial filter 5 are fixedly connected to the filter frame 6. The filter frame 6 abuts against the connecting pipe 2. The air inlet pipe 3 is provided with a limiting ring 7, which is integrally formed with the air inlet pipe 3. A rubber ring 8 is provided between the limiting ring 7 and the filter frame 6. The elastic pre-tightening force provided by the rubber ring 8 makes the filter frame 6 firmly constrained between the connecting pipe 2 and the limiting ring 7. A sealing ring 9 is provided between the connecting pipe 2 and the air inlet pipe 3. The sealing ring 9 is made of notched annular silicone. The left and right halves of the sealing ring 9 are completely embedded in the connecting pipe 2 and the air inlet pipe 3, respectively, so that the connecting pipe 2 and the air inlet pipe 3 are in a sealed state, reducing airflow and pressure loss.

[0035] The activated carbon filter 4 uses an aluminum honeycomb with a through-hole structure as a carrier. Compared with traditional activated carbon filters, it has better gas dynamic performance, lower bulk density, larger specific surface area, higher adsorption efficiency, and lower wind resistance coefficient. It can adsorb organic toxic gases and fine particles in the air, preventing toxic gases or particles from mixing into the dry powder.

[0036] The antibacterial filter 5 uses a composite antibacterial HEPA filter, which is made of high-efficiency low-resistance meltblown material and zero-resistance antibacterial aggregate. It is multi-layered and folded, and the area after unfolding is about 11 times larger than when folded. The filtration efficiency is outstanding, with an antibacterial level of 5.2 against Staphylococcus aureus (standard antibacterial level ≥2.0). This prevents infectious bacteria in the air from mixing into the dry powder and avoids cross-infection between patients.

[0037] Seal 16 is annular, such as Figure 3 and Figure 5As shown, the sealing member 16 is provided with a first convex ring 17 and a second convex ring 18, both of which are integrally formed with the sealing member 16, the first convex ring 17 is completely embedded in the air inlet pipe 3, and the second convex ring 18 is completely embedded in the contraction pipe 11. The middle part of the sealing member 16 is provided with an intermediate ring 19 integrally formed therewith. The connection between the intermediate ring 19 and the sealing member 16 is treated with a transition circle, the air inlet pipe 3 is provided with a first transition groove 20, the contraction pipe 11 is provided with a second transition groove 21, and the intermediate ring 19 is respectively embedded in the first transition groove 20 and the second transition groove 21. By designing the first convex ring 17 and the second convex ring 18, the sealing member 16 is given a stepped structure, and the gap between the air inlet pipe 3 and the contraction pipe 11 is further blocked by the intermediate ring 19, thereby improving the air tightness of the equipment.

[0038] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are only by way of example and that modifications, changes, substitutions and variations can be made by those skilled in the art without departing from the spirit and scope of the application, which is defined solely by the claims and their equivalents.

Claims

1. An otolaryngological head and neck surgical nasal administration device, characterized by: The utility model provides an air filter assembly and powder administration assembly, the air filter assembly includes activated carbon filter screen (4) and antibacterial filter screen (5), and the activated carbon filter screen (4) and antibacterial filter screen (5) are built-in air inlet pipe (3), the air inlet pipe (3) screw thread connection joint (1), the joint (1) is equipped with the nipple (2) integrated with it, the nipple (2) is communicated with the outlet end of air pump, the powder administration assembly includes nozzle (10), the nozzle (10) screw thread connection contraction pipe (11), the contraction pipe (11) is integrated with air inlet pipe (3), and the sealing element (16) is equipped between contraction pipe (11) and nozzle (10), the nozzle (10) is communicated throat pipe (13), and powder inlet pipe (12) is arranged above throat pipe (13), the piston (26) is equipped in powder inlet pipe (12), the piston (26) is fixedly connected with push rod (27), the throat pipe (13) is connected with expansion pipe (14), and the outlet end of expansion pipe (14) is equipped with first eccentric hole (15);The outlet diameter of contraction pipe (11) is less than the diameter of throat pipe (13), and the outlet of contraction pipe (11) is opposite the gas inlet of throat pipe;The outlet end diameter of expansion pipe (14) is greater than the diameter of throat pipe (13).

2. The nasal administration device according to claim 1, wherein: The sealing ring (9) is selected from annular silica gel with notches, and the left and right halves of the sealing ring (9) are completely embedded in the joint (1) and the air inlet pipe (3) respectively.

3. The nasal administration device according to claim 1, wherein: The outer peripheral edges of the activated carbon filter screen (4) and the antibacterial filter screen (5) are fixedly connected with the filter frame (6), the filter frame (6) abuts against the joint (1), and the air inlet pipe (3) is provided with the limiting ring (7) integrally formed with the air inlet pipe (3), and the rubber ring (8) is arranged between the limiting ring (7) and the filter frame (6).

4. The nasal administration device according to claim 1, wherein: The nozzle (10), the powder inlet pipe (12), the throat pipe (13) and the expansion pipe (14) are integrally formed, the taper hole angle α of the contraction pipe (11) is 15°-25°, the taper hole angle β of the expansion pipe (14) is 7°-10°, and the length to inner diameter ratio of the throat pipe (13) is 1.2-2:

1.

5. The nasal administration device according to claim 1, wherein: The nose protection rubber sleeve (22) is expanded and connected to the outer periphery of the expansion pipe (14), the second eccentric hole (23) is formed in the nose protection rubber sleeve (22), the second eccentric hole (23) is aligned with the first eccentric hole (15), the inner wall of the nose protection rubber sleeve (22) is provided with the inner fold (24) integrally formed with the nose protection rubber sleeve (22), and the outer wall of the expansion pipe (14) is provided with the annular groove matched with the inner fold (24).

6. The nasal administration device according to claim 5, wherein: The nose protection rubber sleeve (22) is provided with the indicating groove (25) in the form of an arrow, the indicating groove (25) is located on the side deviated from the vertical center of the nose protection rubber sleeve (22) relative to the second eccentric hole (23), and the indicating groove (25) is coated with a red coating.

7. The nasal administration device according to claim 1, wherein: The maximum diameter of the expansion tube (14) is 2 cm, and the distance between the center of the first eccentric hole (15) and the vertical center of the expansion tube (14) is 2 mm.

8. The nasal administration device according to claim 1, wherein: The sealing element (16) is annular, and the sealing element (16) is provided with a first convex ring (17) and a second convex ring (18), the first convex ring (17) and the second convex ring (18) are integrally formed with the sealing element (16), the first convex ring (17) is completely embedded in the contraction tube (11), the second convex ring (18) is completely embedded in the nozzle (10), and the middle part of the sealing element (16) is provided with an intermediate ring (19) integrally formed therewith.

9. The nasal administration device for otolaryngologic, head and neck surgery of claim 8, wherein: The connection between the intermediate ring (19) and the sealing element (16) is treated with a transition circle, the contraction tube (11) is provided with a first transition groove (20), the nozzle (10) is provided with a second transition groove (21), and the intermediate ring (19) is respectively embedded in the first transition groove (20) and the second transition groove (21).

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