Middle ear ventilation tube

Abstract

A middle ear ventilation tube includes a main body, at least one first wing, and at least one second wing. The main body has a channel extending through its two opposite ends to form an inlet and an outlet. The main body has an outer diameter, the inlet has an inlet diameter, and the outlet has an outlet diameter, the outlet diameter being larger than the inlet diameter. The first wing is disposed on the periphery of the main body and close to the inlet, and is at least partially connected to the main body. The first wing has a first outer diameter and a first inner diameter, the first outer diameter being larger than the first inner diameter, and the first inner diameter being larger than the inlet diameter. The second wing is disposed on the periphery of the main body and close to the outlet, the second wing having a second outer diameter and a second inner diameter, the second outer diameter being larger than the second inner diameter, and the second inner diameter being larger than the outlet diameter. The first outer diameter and the second outer diameter are larger than the outer diameter of the main body, and the first outer diameter is equal to or smaller than the second outer diameter.

Description

Technical Field

[0001] This invention relates to the field of medical technology, and in particular to a middle ear ventilation tube that facilitates drainage of accumulated fluid, is easy to fix, easy to detach, and is convenient for physicians to insert or remove. Prior Technology

[0002] Otitis media is a general term for inflammatory diseases of the middle ear, with middle ear effusion being the most common symptom.

[0003] Possible causes of middle ear effusion include: nasal diseases, acute otitis media, adenoid hypertrophy, upper respiratory tract infection, craniofacial abnormalities, and after radiotherapy for head and neck tumors.

[0004] For patients with middle ear effusion, doctors can insert a ventilation tube into the eardrum through tympanocentesis or myringotomy to allow air to flow into the middle ear and prevent fluid from accumulating behind the eardrum, thus improving hearing loss. In addition, these procedures can also balance middle ear pressure and prevent irreversible damage to the middle ear (such as ossicular defects).

[0005] The ventilation tube is mainly a hollow tube. The doctor places the ventilation tube in the slit formed by the tympanic membrane incision and fixes the ventilation tube to the tympanic membrane, so that the middle ear cavity and the ear canal are connected through the ventilation tube, and the fluid in the middle ear cavity can flow out into the ear canal through the ventilation tube.

[0006] However, due to the narrow ear canal and the small size of the airway (typically about 3 mm in diameter and 1.5-2 mm in orifice), it is very difficult for doctors to insert or remove the airway from the ear. Furthermore, because the airway's orifice is so small, fluid often cannot drain properly, leading to re-accumulation of fluid.

[0007] In addition, the airway usually dislodges into the ear canal on its own about six months to a year after surgery, and then the doctor removes the dislodged airway. The suture of the eardrum will also heal on its own after the airway dislodges. However, if the airway does not dislodge on its own, or if the airway falls into the middle ear cavity, or if the airway has not dislodged after more than 2 years, then an airway removal surgery must be performed.

[0008] Therefore, how to develop a "middle ear ventilation tube" that facilitates drainage of effusion, is easy to fix, easy to dislodge, and is easy for doctors to insert or remove, so as to avoid the shortcomings of conventional ventilation tubes, is an issue that needs to be solved by people in related technical fields. Summary of the Invention

[0009] In one embodiment, the present invention provides a middle ear ventilation tube, comprising: A main body has a channel running through its two opposite ends, parallel to an axis, forming an inlet and an outlet. The main body has an outer diameter in a YZ plane, the inlet has an inlet diameter in the YZ plane, and the outlet has an outlet diameter in the YZ plane, with the outlet diameter being larger than the inlet diameter. The axis is parallel to an X-axis, and the YZ plane is composed of a Y-axis and a Z-axis. The X-axis, Y-axis, and Z-axis are three mutually perpendicular axes. At least one first wing is disposed on the periphery of the main body and near the entrance. The first wing is at least partially connected to the main body. The first wing has a first outer diameter and a first inner diameter in the YZ plane. The first outer diameter is larger than the first inner diameter, the first outer diameter is larger than the outer diameter of the main body, and the first inner diameter is larger than the entrance diameter. At least one second wing is disposed on the periphery of the main body and near the outlet. The second wing has a second outer diameter and a second inner diameter in the YZ plane. The second outer diameter is greater than the second inner diameter. The second outer diameter is greater than the outer diameter of the main body. The second inner diameter is greater than the outlet diameter. The first outer diameter is equal to or less than the second outer diameter. Simple Explanation of the Diagram

[0010] Figure 1 is a front view and a three-dimensional structural diagram of one embodiment of the present invention. Figure 2 is a three-dimensional structural diagram of the embodiment in Figure 1, viewed from the rear and left side. Figure 3 is a front view of the embodiment in Figure 1. Figure 4 is a schematic diagram of the AA cross-sectional structure in Figure 3. Figure 5 is a schematic diagram of the structure of the embodiment in Figure 1 applied to the tympanic membrane inside the ear. Figure 6 is a cross-sectional structural diagram of the embodiment in Figure 1 fixed to the tympanic membrane. Figure 7 is a three-dimensional structural diagram of another embodiment of the present invention, viewed from the front and right sides. Figure 8 is a three-dimensional structural diagram of the embodiment in Figure 7, viewed from the rear and left side. Figure 9 is a front view of the embodiment in Figure 7. Figure 10 is a schematic diagram of the AA cross-sectional structure in Figure 9. Figure 11 is a schematic diagram of the structure of the embodiment in Figure 7 applied to the tympanic membrane inside the ear. Figure 12 is a cross-sectional structural diagram of the embodiment in Figure 7 fixed to the tympanic membrane. Figures 13A-13C are front view structural diagrams of different embodiments derived from the embodiment in Figure 1. Figures 14A-14C are front view structural diagrams of different embodiments derived from the embodiment in Figure 7. Implementation

[0011] Please refer to the embodiment structure shown in Figures 1 to 4. The middle ear ventilation tube 100 of the present invention includes a main body 10, three first wings 20 and a second wing 30.

[0012] The main body 10, the first wing 20 and the second wing 30 may be made of biodegradable materials, such as polylactic acid (PLA), polycaprolactone (PCL) and polyvinyl alcohol (PVA) or a combination of at least two of them.

[0013] The main body 10 is in the shape of a cylindrical tube. The main body 10 has a channel 13 that runs through the opposite ends of the main body 10 and forms an inlet 11 and an outlet 12 at the opposite ends of the main body 10.

[0014] Please refer to Figures 1, 3, and 4. The main body 10 has an outer diameter D10 in the YZ plane. The X-axis, Y-axis, and Z-axis are three mutually perpendicular axes. The inlet 11 has an inlet diameter D11 in the YZ plane. The outlet 12 has an outlet diameter D12 in the YZ plane.

[0015] The axis C10 is parallel to an X-axis. The YZ plane is composed of a Y-axis and a Z-axis. The X-axis, Y-axis, and Z-axis are three mutually perpendicular axes.

[0016] The inlet diameter D11 and the outlet diameter D12 have a special relative relationship: the outlet diameter D12 is larger than the inlet diameter D11.

[0017] Please refer to Figure 4. The channel 13 gradually widens from one end of the inlet 11 toward one end of the outlet 12, and the channel 13 is conical. There is a first included angle θ1 between the two opposite inner sidewalls of the channel 13. The first included angle θ1 is in the range of 15 to 25 degrees, for example, it can be 20 degrees.

[0018] Please refer to Figures 1 to 3. The first wing 20 is disposed on the periphery 14 of the main body 10 and close to the entrance 11, and the first wing 20 is disposed around the entrance 11 with the axis C10 as the center.

[0019] Referring to Figures 3 and 4, the first wing 20 includes a first inner edge 21 and a first outer edge 22, both of which are arc-shaped, and a first inner surface 23 and a first outer surface 24, both of which are arc-shaped. The first inner edge 21 and the first outer edge 22 are located between the first inner surface 23 and the first outer surface 24. The cross-section of each first wing 20 in the direction of the vertical axis C10 (i.e., the radial cross-section of the first wing 20) is rectangular.

[0020] The first inner surface 23 and the first outer surface 24 are parallel to each other, and there is a first thickness T1 between the first inner surface 23 and the first outer surface 24. The first inner surface 23 and the axis C10 have a fourth included angle θ4, which is equal to 90 degrees in this embodiment.

[0021] Please refer to Figure 4. The first inner edge 21 of the first wing 20 is connected to the edge of the end face 15 of the main body 10 with the entrance 11 at the connection point with the adjacent first inner surface 23. The first inner edge 21 of the first wing 20 is only partially connected to the main body 10, and the first outer surface 24 of each first wing 20 protrudes from the end face 15 of the main body 10 with the entrance 11. The direction in which the first outer surface 24 protrudes from the end face 15 is parallel to the axis C10.

[0022] The first inner edge 21 of the three first wings 20 forms an inner circular region with a diameter of a first inner diameter D21, and the first outer edge 22 of the three first wings 20 forms an outer circular region with a diameter of a first outer diameter D22.

[0023] The dimensions of the first inner diameter D21, the first outer diameter D22, the inlet diameter D11, and the main body outer diameter D10 have a special relative relationship: the first outer diameter D22 is greater than the first inner diameter D21, the first outer diameter D22 is greater than the main body outer diameter D10, and the first inner diameter D21 is greater than the inlet diameter D11.

[0024] Please refer to Figures 3 and 4. The second wing 30 is disposed on the periphery 14 of the main body 10 and close to the outlet 12. The second wing 30 is disposed around the outlet 12 with the axis C10 as the center.

[0025] The second wing 30 includes a second inner edge 31 and a second outer edge 32, both of which are annular, and a second inner surface 33 and a second outer surface 34, both of which are annular, with the second inner edge 31 and the second outer edge 32 located between the second inner surface 33 and the second outer surface 34. The cross-section of the second wing 30 in the direction of the vertical axis C10 (i.e., the radial cross-section of the second wing 30) is rectangular.

[0026] The second inner surface 33 and the second outer surface 34 are parallel to each other, and there is a second thickness T2 between the second inner surface 33 and the second outer surface 34. In this embodiment, the first thickness T1 is equal to the second thickness T2, but the first thickness T1 may also be less than the second thickness T2.

[0027] The second inner surface 33 has a fifth included angle θ5 with the axis C10. In this embodiment, the fifth included angle θ5 is equal to 90 degrees.

[0028] The second inner edge 31 is completely connected to the main body 10, which is different from the structure where the first inner edge 21 of the first wing 20 is only partially connected to the main body 10. The second inner edge 31 is connected to the periphery 14 of the main body 10 and is close to the end face 16 of the main body 10 with the outlet 12. The second outer edge 32 protrudes radially from the periphery 14 of the main body 10.

[0029] The second inner edge 31 of the second wing 30 forms an inner circular region with a diameter of the second inner diameter D31, and the second outer edge 32 of the second wing 30 forms an outer circular region with a diameter of the second outer diameter D32.

[0030] The dimensions of the first outer diameter D22, the second inner diameter D31, the second outer diameter D32, the outlet diameter D12, and the main body outer diameter D10 have a special relative relationship: the second inner diameter D31 is greater than the outlet diameter D12, the second outer diameter D32 is greater than the second inner diameter D31, the second outer diameter D32 is greater than the main body outer diameter D10, and the first outer diameter D22 is equal to the second outer diameter D32.

[0031] Please refer to Figures 5 and 6. The middle ear ventilation tube 100 is placed in the tympanic membrane 902 inside the ear 900. The doctor will first make a slit in the tympanic membrane 902, and then use surgical instruments (such as forceps) to hold the middle ear ventilation tube 100 and place it into the slit of the tympanic membrane 902. The first wing 20 and the second wing 30 are respectively held on both sides of the tympanic membrane 902, so that the middle ear ventilation tube 100 can be fixed to the tympanic membrane 902, as shown in Figure 5.

[0032] It is worth emphasizing that when the middle ear ventilation tube 100 is installed, the first wing 20 is located in the middle ear cavity 904, while the second wing 30 is located in the ear canal 906.

[0033] In this way, the middle ear cavity 904 and the ear canal 906 are connected to each other through the middle ear ventilation tube 100, and the water W in the middle ear cavity 904 can flow out into the ear canal 906 through the middle ear ventilation tube 100, thereby draining the water from the middle ear cavity 904.

[0034] Please refer to Figures 4 and 6. The fluid W in the middle ear cavity 904 flows into the channel 13 through the inlet 11 of the middle ear ventilation tube 100, and then flows out into the ear canal 906 through the outlet 12.

[0035] Because the middle ear ventilation tube 100 provided by this invention has a special structural design, including an outlet diameter D12 that is larger than an inlet diameter D11, the accumulated water W can be drained smoothly.

[0036] Furthermore, in this embodiment, after a period of time, since the main body 10, the first wing 20 and the second wing 30 are made of biodegradable materials, the main body 10, the first wing 20 and the second wing 30 will gradually degrade.

[0037] Moreover, since the first inner edge 21 of the first wing 20 is only partially connected to the main body 10, while the second inner edge 31 is completely connected to the main body 10, the first wing 20 will detach from the main body 10 earlier than the second wing 30 during the degradation process. Then the main body 10 and the second wing 30 will fall into the ear canal 906, and the doctor can then remove the main body 10 and the second wing 30 together. The first wing 20 can then naturally degrade and disappear in the middle ear cavity 904.

[0038] Please refer to the embodiment structure shown in Figures 7 to 10. The middle ear ventilation tube 100A of the present invention includes a main body 10A, three first wings 20A and three second wings 30A.

[0039] The main body 10A, the first wing 20A and the second wing 30A may be made of biodegradable materials, such as polylactic acid (PLA), polycaprolactone (PCL) and polyvinyl alcohol (PVA) or a combination of at least two of them.

[0040] The main body 10A is in the shape of a cylindrical tube. The main body 10A has a channel 13A that runs through the opposite ends of the main body 10A and forms an inlet 11A and an outlet 12A at the opposite ends of the main body 10A.

[0041] Please refer to Figures 7 and 10. The main body 10A has an outer diameter D10A in the YZ plane. The X-axis, Y-axis, and Z-axis are three mutually perpendicular axes. The inlet 11A has an inlet diameter D11A in the YZ plane. The outlet 12A has an outlet diameter D12A in the YZ plane.

[0042] The axis C10A is parallel to an X-axis. The YZ plane is composed of a Y-axis and a Z-axis. The X-axis, Y-axis, and Z-axis are three mutually perpendicular axes.

[0043] The inlet diameter D11A and the outlet diameter D12A have a special relative relationship: the outlet diameter D12A is larger than the inlet diameter D11A.

[0044] The main body 10A has four grooves 17A, each groove 17A being located near the periphery 14A of the main body 10A and near the outlet 12A. Each groove 17A is recessed to a depth from the surface of the periphery 14A of the main body 10A and penetrates the end face 16A of the main body 10A having the outlet 12A.

[0045] The function of the groove 17A is to provide surgical instruments that can be inserted into the groove 17A to grasp or clamp the middle ear ventilation tube 100A.

[0046] It should be noted that the number of grooves 17A is designed according to needs and is not limited to the four shown in the figure.

[0047] Please refer to Figure 10. In this embodiment, the channel 13A has a straight section 131A. The straight section 131A extends parallel to the axis C10A with a length equal to the diameter. The two opposite ends of the straight section 131A, parallel to the axis C10A, gradually widen to form an inlet widening section 132A and an outlet widening section 133A, respectively, passing through the main body 10A to form an inlet 11A and an outlet 12A.

[0048] There is a second included angle θ2 between the inner sidewall 1321A of the gradually expanding section 132A and the inner sidewall 1311A of the straight section 131A. The second included angle θ2 is in the range of 5 to 15 degrees, for example, it can be 10 degrees.

[0049] There is a third included angle θ3 between the inner sidewall 1331A of the gradually expanding section 133A and the inner sidewall 1311A of the straight section 131A. The third included angle θ3 is in the range of 15 to 25 degrees, for example, it can be 20 degrees.

[0050] The lengths of the inlet diffuser section 132A and the outlet diffuser section 133A, which extend parallel to the axis C10A, are designed according to actual needs.

[0051] Please refer to Figures 7 to 9. The first wing 20A is disposed on the periphery 14A of the main body 10A and close to the entrance 11A, and the first wing 20A is disposed around the entrance 11A with the axis C10A as the center.

[0052] Referring to Figures 9 and 10, the first wing 20A includes a first inner edge 21A and a first outer edge 22A, both of which are arc-shaped, and a first inner surface 23A and a first outer surface 24A, both of which are arc-shaped. The first inner edge 21A and the first outer edge 22A are located between the first inner surface 23A and the first outer surface 24A. The cross-section of each first wing 20A in the direction of the vertical axis C10A (i.e., the radial cross-section of the first wing 20A) is quadrilateral.

[0053] The first inner surface 23A and the first outer surface 24A are parallel to each other, and a first thickness T1A is formed between the first inner surface 23A and the first outer surface 24A. The first inner surface 23A and the axis C10A have a fourth included angle θ4A, which is less than 90 degrees in this embodiment.

[0054] Please refer to Figures 9 and 10. The first inner edge 21A of the first wing 20A is connected to the periphery 14A of the main body 10A and is close to the entrance 11A. The first wing 20A is arranged around the entrance 11A with the axis C10A as the center. The first inner edge 21A of the first wing 20A is completely connected to the main body 10A, and the first outer edge 22A of each first wing 20A protrudes from the periphery 14A of the main body 10A.

[0055] The first inner edge 21A of the three first wings 20A forms an inner circular region with a diameter of a first inner diameter D21A, and the first outer edge 22A of the three first wings 20A forms an outer circular region with a diameter of a first outer diameter D22A.

[0056] The dimensions of the first inner diameter D21A, the first outer diameter D22A, the inlet diameter D11A, and the main body outer diameter D10A have a special relative relationship: the first outer diameter D22A is greater than the first inner diameter D21A, the first outer diameter D22A is greater than the main body outer diameter D10A, and the first inner diameter D21A is greater than the inlet diameter D11A.

[0057] Referring to Figures 9 and 10, the second wing 30A includes a second inner edge 31A and a second outer edge 32A, both of which are arc-shaped, and a second inner surface 33A and a second outer surface 34A, both of which are arc-shaped. The second inner edge 31A and the second outer edge 32A are located between the second inner surface 33A and the second outer surface 34A. The cross-section of each second wing 30A in the direction of the vertical axis C10A (i.e., the radial cross-section of the second wing 30A) is quadrilateral.

[0058] The second inner surface 33A and the second outer surface 34A are parallel to each other, and a second thickness T2A is provided between the second inner surface 33A and the second outer surface 34A. In this embodiment, the first thickness T1A is equal to the second thickness T2A, but the first thickness T1A may also be less than the second thickness T2A.

[0059] The second inner surface 33A has a fifth included angle θ5A with the axis C10A. In this embodiment, the fifth included angle θ5A is less than 90 degrees.

[0060] Please refer to Figures 9 and 10. The second inner edge 31A of the second wing 30A is connected to the periphery 14A of the main body 10A and is close to the outlet 12A. The second wing 30A is arranged around the outlet 12A with the axis C10A as the center. The second inner edge 31A of the second wing 30A is completely connected to the main body 10A, and the second outer edge 32A of each second wing 30A protrudes from the periphery 14A of the main body 10A.

[0061] The second inner edge 31A of the three second wings 30A forms an inner circular region with a diameter of the second inner diameter D31A, and the second outer edge 32A of the three second wings 30A forms an outer circular region with a diameter of the second outer diameter D32A.

[0062] The dimensions of the first outer diameter D22A, the second inner diameter D31A, the second outer diameter D32A, the inlet diameter D11A, and the main body outer diameter D10A have a special relative relationship: the second outer diameter D32A is greater than the second inner diameter D31A, the second outer diameter D32A is greater than the main body outer diameter D10A, the second inner diameter D31A is greater than the inlet diameter D11A, and the first outer diameter D22A is smaller than the second outer diameter D32A.

[0063] Please refer to Figures 11 and 12. The middle ear ventilation tube 100A is placed in the tympanic membrane 902 inside the ear 900. The doctor will first cut a slit in the tympanic membrane 902, and then use surgical instruments (such as forceps) to hold the middle ear ventilation tube 100A in the groove 17A and place the middle ear ventilation tube 100A into the slit of the tympanic membrane 902. The first wing 20A and the second wing 30A are respectively held on both sides of the tympanic membrane 902, so that the middle ear ventilation tube 100A can be fixed to the tympanic membrane 902, as shown in Figure 11.

[0064] It is worth emphasizing that when the middle ear ventilation tube 100A is installed, the first wing 20A is located in the middle ear cavity 904, while the second wing 30A is located in the ear canal 906.

[0065] In this way, the middle ear cavity 904 and the ear canal 906 are connected to each other through the middle ear ventilation tube 100A, and the water W in the middle ear cavity 904 can flow out into the ear canal 906 through the middle ear ventilation tube 100, thereby draining the water in the middle ear cavity 904.

[0066] Please refer to Figures 10 and 12. The fluid W in the middle ear cavity 904 flows into the channel 13A through the inlet 11A of the middle ear ventilation tube 100A, and then flows out into the ear canal 906 through the outlet 12A.

[0067] Because the middle ear ventilation tube 100A provided by this invention has a special structural design, including an outlet diameter D12A that is larger than an inlet diameter D11A, accumulated water W can be drained smoothly.

[0068] Furthermore, in this embodiment, after a period of time, since the main body 10A, the first wing 20A and the second wing 30A are made of biodegradable materials, the main body 10A, the first wing 20A and the second wing 30A will gradually degrade.

[0069] Furthermore, since the first outer diameter D22A is smaller than the second outer diameter D32A, and the first thickness T1A is equal to the second thickness T2A, that is, the volume of the first wing 20A is smaller than that of the second wing 30A, the first wing 20A will degrade faster than the second wing 30A during the degradation process. Therefore, the main body 10A will fall into the ear canal 906 along with the second wing 30A, and then the doctor can remove the main body 10A together with the second wing 30A.

[0070] Comparing the two sets of embodiments shown in Figures 1-6 and 7-12, although the structures are slightly different, they share common features. Please also refer to Figures 4 and 10:

[0071] The outlet diameters D12 and D12A are larger than the inlet diameters D11 and D11A;

[0072] The first outer diameters D22 and D22A are greater than the first inner diameters D21 and D21A;

[0073] The first outer diameters D22 and D22A are greater than the main body outer diameters D10 and D10A;

[0074] The first inner diameters D21 and D21A are larger than the inlet diameters D11 and D11A;

[0075] The second outer diameters D32 and D32A are greater than the second inner diameters D31 and D31A;

[0076] The second outer diameters D32 and D32A are larger than the main body outer diameters D10 and D10A;

[0077] The second inner diameters D31 and D31A are larger than the outlet diameters D12 and D12A;

[0078] The first outer diameters D22 and D22A are equal to or less than the second outer diameters D32 and D32A.

[0079] Furthermore, the structures of the first wings 20, 20A and the second wings 30, 30A can also be designed according to actual needs, and are not limited to the two sets of embodiments shown in Figures 1-6 and 7-12.

[0080] Please refer to Figures 13A to 13C for front view structural diagrams of different embodiments derived from the embodiment in Figure 1. Figure 13A reveals a first wing 20 in an annular shape, thus obscuring the second wing 30 (see Figures 13B and 13C). Figure 13B reveals two first wings 20 in semi-circular shapes and one second wing 30 in an annular shape. Figure 13C reveals four first wings 20 in arcuate shapes and one second wing 30 in an annular shape, and the first wings 20 have two sizes.

[0081] It is worth noting that the second wing 30 may also be provided with multiple arc-shaped parts of different sizes, similar to the first wing 20 of different types shown in Figures 13A to 13C, and is not limited to a single ring shape.

[0082] Please refer to Figures 14A to 14C, which show front view structural diagrams of different embodiments derived from the embodiment in Figure 7. Figure 14A reveals a ring-shaped first wing 20A and three arc-shaped second wings 30A. Figure 14B reveals three arc-shaped first wings 20A of different sizes and a ring-shaped second wing 30A. Figure 14C reveals a ring-shaped first wing 20A and a ring-shaped second wing 30A.

[0083] Through the two sets of embodiments shown in Figures 1-6 and Figures 7-12, and the six different embodiments shown in Figures 13A-13C and 14A-14C, those skilled in the art will understand that the forms of the first wing and the second wing of the present invention can be designed according to actual needs. Regarding Figures 1 and 7, the first wing 20 of Figure 1 can be paired with the second wing 30A of Figure 7, and the first wing 20A of Figure 7 can be paired with the second wing 30 of Figure 1. Furthermore, the channel 13 of Figure 1 can be interchanged with the channel 13A of Figure 7.

[0084] Furthermore, those skilled in the art will understand that the main bodies 10 and 10A are not limited to a cylindrical shape, and the first wing and the second wing are not limited to annular or arc-shaped shapes, but can be designed as regular or irregular geometric shapes according to actual needs.

[0085] In summary, the middle ear ventilation tube provided by the present invention, through the main body, the first wing and the second wing with special relative sizes, can indeed achieve the purposes of facilitating the drainage of effusion, easy fixation, easy dislodgement, and facilitating the doctor's operation for insertion or removal.

[0086] Although the present invention has been disclosed above by way of embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

[0087] 100,100A: Middle ear ventilation tube 10,10A: Main Body 11,11A: Entrance 12,12A: Export 13,13A: Channel 131A: Straight Section 132A: Inlet Diverging Section 133A: Export widening section 1311A, 1321A, 1331A: Inner wall 14,14A: Outer perimeter 15, 16, 16A: End face 17A: Groove 20,20A: First Wing 21,21A: First inner edge 22,22A: First lateral edge 23,23A: First inner surface 24,24A: First outer surface 30, 30A: Second Wing 31, 31A: Second inner edge 32, 32A: Second lateral edge 33, 33A: Second inner surface 34, 34A: Second outer surface 900: Ears 902: Tympanic membrane 904: Middle ear cavity 906: Ear canal C10, C10A: Axis D10, D10A: Outer diameter of the main body D11, D11A: Inlet diameter D12, D12A: Export diameter D21, D21A: First inner diameter D22, D22A: First outer diameter D31, D31A: Second inner diameter D32, D32A: Second outer diameter T1, T1A: First thickness T2, T2A: Second thickness X, Y, Z: Three axes W: Accumulated water θ1: First included angle θ2: Second included angle θ3: Third included angle θ4, θ4A: Fourth included angle θ5, θ5A: Fifth included angle

Claims

1. A middle ear ventilation tube, comprising: a main body having a channel parallel to an axis through which opposite ends of the main body are connected, forming an inlet and an outlet, the main body having an outer diameter in a YZ plane, the inlet having an inlet diameter in the YZ plane, the outlet having an outlet diameter in the YZ plane, the outlet diameter being larger than the inlet diameter, the axis being parallel to an X-axis, the YZ plane being formed by a Y-axis and a Z-axis, the X-axis, the Y-axis, and the Z-axis being mutually perpendicular; a plurality of first wings disposed on the periphery of the main body and close to the inlet, the first wings being at least partially connected to the main body, the first wings having a first outer diameter and a first inner diameter in the YZ plane, the first outer diameter being larger than the first inner diameter, the first outer diameter being larger than the outer diameter of the main body, and the first inner diameter being larger than the inlet diameter, each of the first wings comprising: The system comprises: a first inner edge and a first outer edge, both of which are arc-shaped; a first inner surface and a first outer surface, both of which are arc-shaped, located between the first inner surface and the first outer surface; a plurality of first wings surrounding the entrance, each of the first inner edges being at least partially connected to the main body, the first inner edges of the plurality of first wings forming an inner circular region with a diameter equal to the first inner diameter, the first outer edges of the plurality of first wings forming an outer circular region with a diameter equal to the first outer diameter; and at least one second wing disposed around the periphery of the main body and near the exit, the second wing having a second outer diameter and a second inner diameter in the YZ plane, the second outer diameter being larger than the second inner diameter, the second outer diameter being larger than the outer diameter of the main body, the second inner diameter being larger than the exit diameter, and the first outer diameter being equal to or smaller than the second outer diameter.

2. The middle ear ventilation tube as requested in item 1, wherein the passage gradually widens from one end of the inlet toward one end of the outlet, and the passage is cone-shaped.

3. The middle ear ventilation tube as requested in claim 2, wherein the two opposing inner walls of the passage have a first angle between them, the first angle being in the range of 15 to 25 degrees.

4. The middle ear ventilation tube as requested in item 1, wherein the passage has a straight section that extends parallel to the axis of the body with a length equal to the diameter of the tube, and the straight section gradually expands at opposite ends of the axis of the body to form an inlet expansion section and an outlet expansion section that extends parallel to the axis of the body to form the inlet and the outlet.

5. The middle ear ventilation tube as requested in item 4, wherein the inner wall of the gradually dilating inlet section and the inner wall of the straight section have a second included angle, the second included angle being in the range of 5 to 15 degrees.

6. The middle ear ventilation tube as requested in item 4, wherein the inner wall of the gradually dilating outlet section and the inner wall of the straight section have a third angle, the third angle being in the range of 15 to 25 degrees.

7. The middle ear ventilation tube as claimed in claim 1, wherein the connection between each of the first inner edges and the adjacent first inner surface is connected to the edge of the end face of the body having the inlet, each of the first outer surfaces protrudes from the end face of the body having the inlet, and the direction in which the first outer surface protrudes from the end face is parallel to the axis.

8. The middle ear ventilator as requested in item 1, wherein the plurality of first wings are interconnected to form a ring structure.

9. The middle ear ventilation tube as claimed in claim 1, wherein the first inner surface and the first outer surface are parallel to each other, and the first inner surface and the first outer surface have a first thickness.

10. The middle ear ventilation tube as claimed in claim 1, wherein the first inner surface and the first outer surface are parallel to each other, and the first inner surface has a fourth included angle with the axis, the fourth included angle being equal to or less than 90 degrees.

11. The middle ear airway as claimed in claim 1, having a plurality of the second wings, each of the second wings comprising: A second inner edge and a second outer edge that are both arc-shaped; And a second inner side and a second outer side, both of which are arc-shaped, with the second inner edge and the second outer edge located between the second inner side and the second outer side; the plurality of second wings are arranged around the outlet with the axis as the center, and each of the second inner edges is at least partially connected to the main body. The second inner edges of the plurality of second wings form an inner circular region with the diameter of the inner circular region being the second inner diameter. The second outer edges of the plurality of second wings form an outer circular region with the diameter of the outer circular region being the second outer diameter.

12. The middle ear ventilation tube of claim 11, wherein each of the second inner edges is connected to the periphery of the body and close to the end face of the body having the outlet, and each of the second outer edges protrudes from the periphery of the body.

13. The middle ear ventilator as claimed in claim 11, wherein the plurality of second wings are interconnected to form a ring structure.

14. The middle ear ventilation tube as claimed in claim 11, wherein the second inner surface and the second outer surface are parallel to each other, and the second inner surface has a fifth angle with the axis, the fifth angle being equal to or less than 90 degrees.

15. The middle ear ventilation tube of claim 11, wherein the second inner surface and the second outer surface are parallel to each other, and a second thickness is present between the second inner surface and the second outer surface.

16. The middle ear ventilation tube of claim 1, wherein the body has a plurality of grooves, each groove being disposed on the periphery of the body and near the outlet, each groove being recessed to a depth from the periphery of the body and penetrating the end face of the body having the outlet.

17. The middle ear ventilation tube as claimed in claim 16, wherein the outer surface of the main body is provided with four grooves at equal intervals.

18. The middle ear ventilation tube as requested in item 1, wherein the main body is in the shape of a cylindrical tube.

19. The middle ear ventilation tube as claimed in claim 1, wherein the main body, each of the first wings and each of the second wings are made of a biodegradable material.

20. The middle ear ventilation tube as claimed in claim 19, wherein the biodegradable material is one of polylactic acid (PLA), polycaprolactone (PCL), polyvinyl alcohol (PVA), or a combination of at least two of them.

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