Degradable fixing ring for fixing external auditory canal flap in external auditory meatus plasty
By designing a biodegradable fixation ring, the problem of medial fixation of the flap during external auditory canal reconstruction was solved, achieving close adhesion between the flap and the bone, reducing infection and nursing frequency, and improving patient compliance and hearing preservation.
Patent Information
- Application Number
- CN202520223858.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-12
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-02-12
AI Technical Summary
In current external auditory canal reconstruction surgery, the inner side of the external auditory canal transplant flap is difficult to fix, resulting in poor fit, displacement or overturning. In addition, the existing packing materials need to be changed frequently, which can easily cause infection and make assessment difficult.
A biodegradable fixation ring is designed, consisting of biodegradable strips, which achieves extended fixation through nesting and limiting structures, fixing only the inner side of the flap, maintaining adhesion and biodegradability, and avoiding the use of packing materials.
This approach achieves close integration of the external auditory canal flap with the bone, reducing the risk of infection, simplifying the nursing process, and improving compliance and hearing preservation.
Smart Images
Figure CN223845848U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the field of medical apparatus and instruments, and particularly relates to an absorbable fixing ring for fixing an external auditory canal flap in external auditory canal plasty. BACKGROUND
[0002] At present, the main treatment method for patients with external auditory canal stenosis or atresia caused by various reasons is external auditory canal plasty. The surgery requires removing the soft tissue of the external auditory canal stenosis or atresia and grinding part of the bone to reestablish the cavity structure of the external auditory canal. However, the epithelium of the cavity structure of the external auditory canal established by the surgery is missing, so skin transplantation is required.
[0003] Since the external auditory canal has a barrel-shaped structure, the shape of the external auditory canal transplantation flap also needs to be made into a barrel shape to fit the bone of the external auditory canal. When the external auditory canal flap is transplanted, the outer side of the barrel-shaped external auditory canal transplantation flap can be sutured and fixed with the skin of part of the auricle, while the inner side of the external auditory canal transplantation flap cannot be fixed, which easily leads to poor adhesion of the transplantation flap to the bone, lateral displacement or even inversion of the transplantation flap, and further causes necrosis of the flap, re-stenosis of the external auditory canal, or lateral displacement of the tympanic membrane, resulting in hearing loss.
[0004] The current solution is to perform external auditory canal packing for 3-6 months after the external auditory canal skin transplantation surgery to support the shape of the external auditory canal transplantation flap. Common packing materials include expanded sponge and iodoform gauze. With this packing method, the patient needs to return to the clinic every 2 weeks to replace the packing material to prevent infection caused by the packing material. Replacing the packing material often causes discomfort to the patient. Moreover, due to the external auditory canal packing, the secretions of the external auditory canal skin cannot be discharged, and regular cleaning is required. The accumulation of cortex and exudate over 2 weeks easily causes local infection. In addition, the packing material fills the external auditory canal, which is not conducive to the evaluation of the survival status of the transplantation flap by the doctor. The packing material needs to be removed to evaluate the transplantation flap. UTILITY MODEL CONTENT
[0005] The utility model aims to provide a degradable fixing ring for fixing an external auditory canal flap in external auditory canal plasty.
[0006] The utility model achieves the above-mentioned purpose through the following technical solutions.
[0007] A degradable fixing ring for fixing an external auditory canal flap in external auditory canal plasty, characterized by being composed of degradable bands connected by bending, the head and tail ends of the degradable bands being provided with nesting structures capable of being nested together, the degradable fixing ring being able to be stretched and enlarged by stretching the connection at the nesting structure, the head and tail ends of the degradable bands being further provided with limiting structures capable of limiting the degradable fixing ring from shrinking back after being stretched and enlarged, and the degradable fixing ring being provided with a connecting part for fixed connection with an external auditory canal transplantation flap.
[0008] The further technical scheme of the utility model discloses: the nested structure includes the sleeve hole of being arranged in the head of degradable band, the sleeve hole goes in along the length direction of degradable band, the tail of degradable band can be inserted into the sleeve hole, to realize nesting.
[0009] The further technical scheme of the utility model discloses: the limiting structure includes the blocking block of being arranged at the outer port of sleeve hole and the multiple card stations of being arranged at the tail of degradable band, and the multiple card stations are sequentially arranged along the length direction of degradable band, and the side of blocking block towards the sleeve hole is provided with first slope, and the other side is provided with first blocking surface, and the side of card station towards the most tail end of degradable band is provided with second blocking surface, and the other side is provided with second slope.
[0010] The further technical scheme of the utility model discloses: the outer port of sleeve hole is provided with the extension of going out, and the blocking block is arranged on the extension.
[0011] The further technical scheme of the utility model discloses: the connecting part is hollow semicircular ring.
[0012] The further technical scheme of the utility model discloses: four connecting parts are arranged on the degradable fixing ring, and the included angle between adjacent connecting parts is ninety degrees.
[0013] Compared with the prior art, the utility model has the following beneficial effects:
[0014] 1, the degradable fixing ring of the utility model is fixed in the inner side of the ear canal transplanting skin flap of barrel shape through connecting part when using, and the inner side of ear canal transplanting skin flap is supported up through extension and enlargement, so that the inner side of ear canal transplanting skin flap can be closely combined with ear canal bone, and a certain pressure is kept, and the fixation of ear canal skin flap is realized.
[0015] 2, compared with the existing filling method, the degradable fixing ring of the utility model does not need to fill the entire ear canal, only fixes the inner side part of ear canal transplanting skin flap, and can achieve the same purpose of preventing the poor combination of transplanting skin flap and bone, and the lateral displacement or even overturning.
[0016] Meanwhile, since the utility model is annular structure, only the inner side part of ear canal transplanting skin flap is fixed, and most of the space of ear canal still exists, and the secretion of ear canal skin can be discharged automatically, and regular cleaning is not needed.
[0017] 3, the degradable fixing ring of the utility model is degradable material, and after use, secondary operation is not needed to take out, and can be automatically degraded by human body. DRAWINGS
[0018] Figure 1 is a perspective view of the degradable fixing ring of the embodiment of the present application;
[0019] Figure 2 is a front view of the degradable fixing ring of the embodiment of the present application;
[0020] Figure 3 is a sectional view of the degradable fixing ring of the embodiment of the present application;
[0021] Figure 4 is a structural view of the nesting position of the degradable fixing ring of the embodiment of the present application;
[0022] Figure 5 is a schematic view of the degradable fixing ring in use of the embodiment of the present application.
[0023] The meaning of the reference signs in the drawings is as follows:
[0024] 100 - degradable fixing ring; 101 - degradable belt; 102 - head of the degradable belt; 103 - tail of the degradable belt; 104 - connecting part; 105 - sleeve hole; 106 - clamping table; 107 - blocking block; 108 - extension part; 109 - first inclined surface; 110 - first blocking surface; 111 - second inclined surface; 112 - second blocking surface; 200 - external auditory canal transplantation flap; 300 - external auditory canal; 400 - skin at the external auditory canal opening auricle. DETAILED DESCRIPTION
[0025] The present application is further described below in combination with the embodiments.
[0026] In the description of the present application, it is understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation on the present application.
[0027] In the description of the present application, the meaning of several is one or more, and the meaning of multiple is two or more, greater than, less than, more than, etc. are understood as not including the number, and above, below, etc. are understood as including the number. If it is described as first, second, etc., it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.
[0028] In the description of the utility model, unless otherwise explicitly limited, the words such as setting, installing, connecting should be understood broadly, and the skilled in the art can determine the specific meaning of the above words in the utility model according to the specific content of the technical scheme.
[0029] Embodiment:
[0030] As Figures 1 to 4 The degradable fixing ring 100 for ear canal plasty fixed ear canal flap of the embodiment is made of existing degradable material as a whole, and has certain elasticity.
[0031] The degradable fixing ring 100 of the embodiment is connected by bending a degradable band 101, and the head and tail ends of the degradable band 101 are provided with nesting structures capable of being nested together. Figure 4 As shown in the figure, the specific structure of the nesting structure is: including a sleeve hole 105 arranged at the head 102 of the degradable band, the sleeve hole 105 goes inwards along the length direction of the degradable band 101, the thickness of the position where the sleeve hole 105 is located will increase, and the tail end 103 of the degradable band can be inserted into the sleeve hole 105 to realize nesting. When the tail end 103 of the degradable band is completely inserted into the sleeve hole 105, the degradable fixing ring 100 is in the smallest shrinkage state; continuously stretching the tail end 103 of the degradable band out of the sleeve hole 105 can continuously expand the degradable fixing ring 100. The degradable fixing ring 100 of the embodiment can be reduced to an outer diameter of 0.9 cm, and can be expanded to an outer diameter of 1.2 cm.
[0032] Limiting structures capable of limiting each other are further arranged at the head and tail ends of the degradable band 101, and the limiting structures can limit the degradable fixing ring 100 to shrink back after the degradable fixing ring 100 expands. Figure 4 As shown in the figure, the specific structure of the limiting structure is: including a blocking block 107 arranged at the outer port of the sleeve hole 105 and a plurality of clamping tables 106 arranged at the tail end 103 of the degradable band, the outer port of the sleeve hole 105 is provided with an extension 108 extending outward, the blocking block 107 is arranged on the extension 108, the plurality of clamping tables 106 are arranged in sequence along the length direction of the degradable band 101, and the blocking block 107 can cooperate with the clamping tables 106 to limit. The cross-sectional shape of the blocking block 107 and the clamping table 106 is a right triangle shape, a first inclined surface 109 is arranged on one side of the blocking block 107 facing the sleeve hole 105, a first blocking surface 110 perpendicular to the first inclined surface 109 is arranged on the other side, a second blocking surface 112 perpendicular to the second inclined surface 111 is arranged on one side of the clamping table 106 facing the tail end of the degradable band 101, and a second inclined surface 111 is arranged on the other side.
[0033] When the tail 103 of the degradable belt is continuously pulled out of the sleeve hole 105, the second slope 111 of the clamping table 106 contacts the first slope 109 of the blocking block 107, and the first slope 109 and the second slope 111 will slide relative to each other, and cannot block the pulling out of the tail 103 of the degradable belt. When the expansion of the degradable fixing ring 100 is completed, the second blocking surface 112 of the clamping table 106 will abut against the first blocking surface 110 of the blocking block 107, so that the tail 106 of the degradable belt cannot be retracted into the sleeve hole 105, that is, the degradable fixing ring 100 is limited to be reduced back.
[0034] The degradable fixing ring 100 of the embodiment is provided with four connecting portions 104, which are hollow semicircular rings with a diameter of about 0.5 mm, and can be sutured and fixed with the grafted ear canal flap through sutures. The included angle between adjacent connecting portions 104 is 90°, and the included angle between the connecting portion 104 closest to the sleeve hole and the outer end surface of the sleeve hole is 30°, that is, as shown in Figure 2 , the end surface of the head 102 of the degradable belt is set at the 0° position of the circumference, and the four connecting portions 104 are respectively at the positions of 30°, 120°, 210° and 300°.
[0035] The use method of the degradable fixing ring 100 of the embodiment is as follows:
[0036] Initially, the degradable fixing ring 100 is in the smallest retracted state. When the ear canal flap 200 is transplanted, the degradable fixing ring 100 is first placed inside the barrel-shaped ear canal graft 200, and the four semicircular connecting portions 104 are sutured and fixed with the ear canal graft 200 through sutures, so as to pre-fix the degradable fixing ring 100 inside the barrel-shaped ear canal graft 200.
[0037] As shown in Figure 5 , then the ear canal graft 200 is placed in the external auditory canal 300 together with the degradable fixing ring 100, and the outer side of the ear canal graft 200 is sutured and fixed with the skin 400 at the auricle of the external auditory canal. After the inner side of the ear canal graft 200 is placed together with the degradable fixing ring 100 to a suitable depth, the head and tail ends of the degradable belt 101 are clamped with tweezers or other tools, the tail 103 of the degradable belt is pulled out of the sleeve hole 105, so that the degradable fixing ring 100 gradually expands and becomes larger, and finally the inner side of the ear canal graft 200 is well fitted with the bone of the external auditory canal and maintains a certain pressure. At this time, the second blocking surface 112 of the clamping table 106 will abut against the first blocking surface 110 of the blocking block 107, so that the tail 103 of the degradable belt cannot be retracted into the sleeve hole 105, and the degradable fixing ring 100 is limited to be reduced back. Finally, the fixation of the ear canal flap 200 is completed.
[0038] The above embodiments of the utility model are not the limitation of the protection scope of the utility model, and the implementation mode of the utility model is not limited to this, and according to the above content of the utility model, according to the ordinary technical knowledge and usual means in the field, other various forms of modification, replacement or change of the above structure of the utility model are made without departing from the above basic technical thought of the utility model, and all should fall within the protection scope of the utility model.
Claims
1. A degradable retention ring for use in a canaloplasty to retain an external ear canal flap, characterized by: The degradable band is connected by bending, and the head and tail ends of the degradable band are provided with nesting structures capable of being nested together. The degradable fixing ring can be stretched and enlarged by stretching the connection at the nesting structure. Limiting structures are further provided at the head and tail ends of the degradable band, which can limit the degradable fixing ring from shrinking back after being stretched and enlarged. The degradable fixing ring is provided with a connecting part for fixed connection with an external ear canal skin flap.
2. The degradable fixation ring for use in a meatal advancement flap fixation for meatal advancement surgery of claim 1, wherein: The nesting structure comprises a sleeve hole provided at the head of the degradable band, which penetrates inward along the length direction of the degradable band. The tail of the degradable band can penetrate into the sleeve hole to achieve nesting.
3. The degradable fixation ring for use in a meatal advancement flap fixation for meatal advancement surgery of claim 2, wherein: The limiting structure comprises a blocking block provided at the outer port of the sleeve hole and a plurality of clamping tables provided at the tail of the degradable band. The plurality of clamping tables are arranged in sequence along the length direction of the degradable band. The side of the blocking block facing the sleeve hole is provided with a first inclined surface, and the other side is provided with a first blocking surface. The side of the clamping table facing the tail end of the degradable band is provided with a second blocking surface, and the other side is provided with a second inclined surface.
4. The degradable retention hoop for use in a meatal advancement flap in meatal advancement surgery of claim 3, wherein: The outer port of the sleeve hole is provided with an extension extending outward, and the blocking block is arranged on the extension.
5. The degradable fixation ring for use in meatoplast fixation of meatoplast flaps according to claim 1, characterized in that: The connecting part is a hollow semicircular ring.
6. The degradable fixation ring for use in meatoplast fixation of meatoplast flaps according to claim 1, characterized in that: The degradable fixing ring is provided with four connecting parts, and the included angle between adjacent connecting parts is ninety degrees.