External auditory canal medicine-loadable open stent supporting and conveying system

Abstract

The utility model discloses an external auditory canal medicine-loadable open stent supporting and conveying system, and relates to the technical field of external auditory canal medical instruments. The stent comprises a far-end cylinder arranged in an external auditory canal, a near-end ball located outside the auditory canal and used for fixing the stent, and a stainless steel fixing sleeve arranged on the outer surface of the near-end ball. An opening is formed in the near-end ball; the conveying system comprises a conveying sheathing canal, a pushing rod and a coil, and the coil is connected with the pushing rod through a reserved hole in the front end of the pushing rod. The external auditory canal medicine-loadable open stent supporting and conveying system is formed by weaving nickel-titanium alloy, compared with a traditional supporting mode, the supporting force is higher, the reserved space is sufficient, a patient feels more comfortable, a channel is provided for clinical observation and follow-up medicine feeding through the opening design in the near-end ball, a special conveying system is arranged, and the external auditory canal medicine-loadable open stent supporting and conveying system is convenient to use. And the opportunity of secondary injury of wounds of patients is reduced.

Description

Technical Field

[0001] This utility model relates to the field of medical devices for the external auditory canal, and in particular to a drug-carrying opening stent support and delivery system for the external auditory canal. Background Technology

[0002] External auditory canal reconstruction is the main surgical method for restoring the normal width and contour of the external auditory canal. However, its most common complication remains restenosis or atresia of the external auditory canal, with a recurrence rate of 6%-27%. After restenosis or atresia, the reconstructed hearing will decline again, even falling back to the pre-operative level, leading to surgical failure. Therefore, effectively preventing and treating postoperative restenosis or atresia is crucial. Consequently, maintaining the shape of the external auditory canal after reconstruction has become a global challenge, resulting in the development of various external auditory canal support methods and materials, such as silicone tubes, expanded foam, alloy supports, and gauze packing. However, these technologies also have drawbacks that trouble patients. The silicone tube has a fixed shape and cannot be adjusted in terms of support strength and shape according to the patient's ear canal position. The hardness of the silicone tube material cannot achieve the ideal support effect. The support force of the expanding sponge and gauze is relatively small, requiring the entire ear canal to be filled to achieve the required force. This leads to ear canal blockage and symptoms such as ear fullness and discomfort, hearing loss, or dizziness. Due to the material of silicone tubes, expanding sponges, and gauze, the entire ear canal must be filled, leaving no space for later clinical observation. The process of removing and pulling out the expanding sponge and gauze after filling can easily cause secondary damage to the wound due to the large area of ​​contact with the wound.

[0003] Chinese patent CN219323584U discloses a rigid earmold support for the external auditory canal. The support body has: an inlet end with a smaller outer contour, a support end opposite the inlet end with a larger outer contour, and a sidewall connecting the inlet end and the support end; a motion lock placed in the concha cavity to provide auxiliary support for the support, the motion lock having an arc-shaped structure that fits against the outer edge of the concha cavity, and one end connected to the sidewall of the support body near the support end. The support body achieves the technical effect of supporting the external auditory canal by using a rigid support method and replacing the concha cavity portion with a motion lock. Utility Model Content

[0004] The technical problem to be solved by this utility model is to propose a support and delivery system for a drug-carrying opening stent in the external auditory canal that provides better support, stronger support, and greater comfort.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A drug-carrying opening stent support and delivery system for the external auditory canal, the key technology of which is that it includes two parts: a stent part and a delivery device.

[0007] Preferably, the support portion includes a distal cylinder placed in the external auditory canal, a proximal sphere located outside the ear canal for fixing the support, and a stainless steel fixing sleeve disposed on the outer surface of the proximal sphere; the proximal sphere and the distal cylinder are interconnected as a whole;

[0008] Preferably, the conveying device includes a conveying sheath and a push rod; the conveying sheath is slender and tubular in shape; the push rod is a long and thin straight rod; and a coil is embedded in the front end of the push rod.

[0009] Preferably, the proximal sphere has an opening with a diameter of 5-12 mm.

[0010] Preferably, the distal cylinder has a diameter of 5-12 mm and a length of 20-35 mm.

[0011] Preferably, the diameter of the proximal sphere is 7-15 mm, and the bending angle between the central axis of the proximal sphere and the distal cylinder is 20°-60°.

[0012] Preferably, the support structure is made entirely of nickel-titanium alloy and has a mesh structure.

[0013] Preferably, the delivery sheath is sleeved on the outside of the push rod.

[0014] Preferably, the inner diameter of the delivery sheath is 2-4 mm, the outer diameter is 2.4-4.4 mm, and the length is 40-70 mm.

[0015] Preferably, the length of the push rod is 60-90mm, the diameter is 1.8-3.8mm, and the diameter of the front coil is 8-15mm.

[0016] The advantages of adopting this technical solution are:

[0017] The support in this invention is made of nickel-titanium alloy woven into shape, and the support force can be adjusted by the wire diameter, weaving method and weaving density, so as to adapt to the postoperative support of different external auditory canals.

[0018] The stent in this invention uses an innovative opening design to provide a channel for doctors to check the patient's postoperative recovery.

[0019] The bracket in this invention features a positioning ball at the front end to prevent the bracket from entering deep into the ear canal and irritating the tympanic membrane. The curved design of the ball facilitates the use of the opening direction and allows the stainless steel fixing sleeve to be glued and fixed to the external ear cartilage.

[0020] The bracket and its accompanying conveying device in this utility model can smoothly complete the insertion and removal of the bracket;

[0021] The stent in this invention can be covered with a membrane and then loaded with postoperative medications, serving as a continuous drug delivery platform for the external auditory canal. Attached Figure Description

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] Figure 1 This is a schematic diagram of a drug-carrying opening stent for the external auditory canal proposed in this utility model;

[0024] Figure 2 This is a schematic diagram of a delivery system for a drug-carrying stent in the external auditory canal proposed in this utility model.

[0025] Explanation of reference numerals in the attached figures

[0026] a. Distal cylinder, b. Proximal sphere, c. Stainless steel retaining sleeve, 1. Delivery sheath, 2. Push rod, 4. Coil. Detailed Implementation

[0027] To better understand the technical solution proposed by this utility model, exemplary embodiments of this utility model will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of this utility model are shown in the drawings, it should be understood that this utility model can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this utility model can be understood more clearly and thoroughly, and that the scope of this utility model can be fully conveyed to those skilled in the art.

[0028] This invention proposes a drug-loadable opening support and delivery system for the external auditory canal, comprising a support portion and a delivery device. The support portion is woven from a nickel-titanium alloy and consists of a distal cylinder a and a proximal sphere b, with a stainless steel fixing sleeve c on the outer surface of the proximal sphere b. The distal cylinder a has a diameter of 5-12 mm and a length of 20-35 mm. Considering the length of the human external auditory canal is approximately 2.5-3.5 cm, this length is sufficient for postoperative support in most external auditory canals. The proximal sphere b has a diameter of 7-15 mm, and its center is not on the same horizontal line as the central axis of the distal cylinder a, with a bending angle of 20°-60°. An opening of 5-12 mm in diameter is located on the proximal sphere b. This invention, by opening the proximal sphere b, facilitates subsequent observation of the patient's recovery after surgery by the physician. The system provides a convenient access for patients with ear canal issues. The entire support structure is made of nickel-titanium alloy braiding, allowing for adjustment of support force by changing the wire diameter, braiding method, and braiding density. In practical use, it can be adaptively adjusted according to the specific needs of the patient's ear canal, improving support effectiveness and patient comfort. Compared to silicone tube support, the alloy support is harder and provides stronger support. Due to its mesh structure, it is more breathable during use. Furthermore, using alloy support, compared to materials like sponge or gauze, allows for reserved space in the external auditory canal for later clinical observation, preventing symptoms such as ear fullness, hearing loss, or dizziness caused by filling the ear canal. The proximal sphere B prevents the support from entering deep into the ear canal, irritating the tympanic membrane, and hindering later removal of the support. The curved angle of the proximal sphere B facilitates convenient use with the opening direction and allows for the stainless steel fixing sleeve to be adhered and fixed to the external auditory cartilage.

[0029] To further facilitate the insertion and removal of the support, this utility model is equipped with a corresponding conveying device, including a conveying sheath 1 and a push rod 2. A coil 4 is provided at the front end of the push rod 2, and the coil 4 passes through a pre-drilled hole at the front end of the push rod 2 and is connected to the push rod 2. The inner diameter of the conveying sheath 1 is 2-4mm, the outer diameter is 2.4-4.4mm, and the length is 40-70mm. The length of the push rod 2 is 60-90mm, the diameter is 1.8-3.8mm, and the diameter of the front coil 4 is 8-15mm. The conveying sheath 1 is sleeved on the outside of the push rod 2.

[0030] In practical use, the coil 4 at the front end of the push rod 2 locks the stainless steel fixing sleeve c of the bracket, and then the rear end of the push rod 2 is pulled to plastically pull the bracket into the delivery sheath 1. The bracket is then inserted into the ear canal along with the delivery sheath 1. When the appropriate position is reached, the delivery sheath 1 is withdrawn, at which point the bracket separates from the delivery sheath 1, and the coil 4 and bracket are delivered. The coil 2 is then separated from the bracket. Finally, the stainless steel fixing sleeve c of the proximal sphere b is fixed to the external auditory canal cartilage with adhesive tape to prevent the bracket from falling off. When removing the bracket, similarly, the coil 4 is first locked to the stainless steel fixing sleeve c of the bracket, the bracket is retracted into the delivery sheath 1, and then removed from the delivery sheath 1 while simultaneously taking out the bracket. The coil 4 at the front end of the push rod 2 can be designed with an external thread structure, which can match the internal thread of the stainless steel fixing sleeve c of the bracket for insertion and removal. Compared with traditional supports such as expanded sponges and gauze strips, the delivery device proposed in this invention requires dragging during removal, which can easily lead to secondary damage to the wound due to large-area contact with the wound.

[0031] The alloy stent proposed in this invention not only meets the requirements for supporting the ear canal, but can also serve as a continuous drug delivery platform for the external auditory canal after specific membrane application, loading postoperative medications and providing more possibilities for the patient's postoperative recovery.

[0032] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

Claims

1. An outer ear canal drug loadable opening stent support and delivery system, characterized by, It consists of two parts: a support frame and a conveying device; The support portion includes a distal cylinder (a) placed in the external auditory canal, a proximal sphere (b) located outside the auditory canal for fixing the support, and a stainless steel fixing sleeve (c) disposed on the outer surface of the proximal sphere (b); the proximal sphere (b) and the distal cylinder (a) are interconnected as a whole. The conveying device includes a conveying sheath (1) and a push rod (2); the conveying sheath (1) is slender and tubular in shape; the main body of the push rod (2) is a slender straight rod; a coil (4) is provided at the front end of the push rod (2) and is connected to the push rod (2) through a hole reserved at the front end of the push rod (2).

2. An outer ear canal drug loadable opening stent support and delivery system according to claim 1, wherein, An opening is provided on the proximal sphere (b), with an opening diameter of 5-12 mm.

3. An outer ear canal drug loadable opening stent support and delivery system according to claim 1, wherein, The distal cylinder (a) has a diameter of 5-12 mm and a length of 20-35 mm.

4. An outer ear canal drug loadable opening stent support and delivery system according to claim 1, wherein, The diameter of the proximal sphere (b) is 7-15 mm, and the bending angle between the central axis of the proximal sphere (b) and the distal cylinder (a) is 20°-60°.

5. The external auditory canal drug-carrying opening support and delivery system according to claim 1, characterized in that, The support structure is made entirely of nickel-titanium alloy and has a mesh-like structure.

6. An open ear drug loadable concha support and delivery system according to claim 1, wherein, The delivery sheath (1) is sleeved on the outside of the push rod (2).

7. An outer ear canal drug loadable opening stent support and delivery system according to claim 1, wherein, The inner diameter of the delivery sheath (1) is 2-4 mm, the outer diameter is 2.4-4.4 mm, and the length is 40-70 mm.

8. An otic drug loadable office support and delivery system according to claim 1, wherein, The length of the push rod (2) is 60-90mm and the diameter is 1.8-3.8mm, and the diameter of the front coil (4) is 8-15mm.

Images