A device for inhibiting scar proliferation in an ear reconstruction skin graft area

Abstract

This invention belongs to the field of plastic surgery medical device technology, specifically relating to a device for inhibiting scar hyperplasia in ear reconstruction skin graft areas. It addresses the technical problem that existing devices, designed specifically for single skin graft areas, cannot guarantee effective pressure application when simultaneously covering two skin graft areas. The device includes a pressure application module and a connecting structure. The pressure application module includes a postauricular pressure application structure and a preauricular pressure application structure. The postauricular pressure application structure has an auricular surface that conforms to the skin graft site on the back of the ear from back to front, and a temporal bone surface that conforms to the temporal bone skin graft site in a left-right direction. The preauricular pressure application structure has a pressure application part that applies pressure to the target area on the front side of the auricle from front to back. The connecting structure connects the left and right pressure application modules and applies opposing forces in the left-right direction to the two postauricular pressure application structures. One device simultaneously meets two different pressure directions and pressure requirements, achieving precise adaptation to different skin graft areas in ear reconstruction.

Description

Technical Field

[0001] This invention belongs to the field of plastic surgery medical device technology, specifically relating to a device for inhibiting scar hyperplasia in the skin graft area of ​​ear reconstruction. Background Technology

[0002] Ear reconstruction is a core plastic surgery procedure for treating congenital microtia or acquired ear defects, such as... Figure 1 As shown, this surgery requires skin grafting and tissue repair at the back-of-the-ear skin graft site 401 and the postauricular temporal bone skin graft site 402. Both areas are high-risk sites for postoperative scar hyperplasia. These two areas are anatomically demarcated by the cranioauricular sulcus 403. Their anatomically adjacent structures and physiologically related functions mean that scar hyperplasia can easily influence each other. Specifically, the back-of-the-ear skin graft site 401 is prone to hypertrophic scarring due to excessive fibrous tissue proliferation 3-6 months post-surgery, affecting the ear's appearance and harmony, and even causing local traction, pain, or compromising the stability of the reconstructed ear's shape. The postauricular temporal bone skin graft site 402 is prone to scar hyperplasia due to abnormal skin tissue repair mechanisms, potentially leading to ear traction deformities, local skin contracture, and further affecting the appearance and function of the reconstructed ear. Clinical studies have confirmed that continuous and precise local pressure is a key method to inhibit scar hyperplasia in these two skin graft areas.

[0003] Existing devices for suppressing scarring after ear reconstruction are all specialized instruments designed for a single skin graft area: one type applies clamping pressure to the skin graft site behind the ear, such as the Chinese patent with authorization announcement number CN209464178U; the other type applies unilateral compression to the skin graft site behind the ear temporal bone.

[0004] In clinical practice, if only a single-area device is used, the other area is prone to scar hyperplasia due to lack of effective pressure. If two single-area devices are used together to achieve dual-area coverage, the two devices are designed to be adapted to the morphological characteristics and pressure methods of the single area respectively. Since there is no structural connection and synergistic mechanism between them, it is difficult to achieve simultaneous close fit and pressure synergy between the two areas when used together, and the pressure effect under dual-area coverage cannot be guaranteed. Summary of the Invention

[0005] This invention provides a device for inhibiting scar hyperplasia in the skin graft area of ​​ear reconstruction, thereby solving the technical problem that existing devices are all specialized instruments designed for a single skin graft area, which makes it impossible to guarantee the pressure effect when covering two skin graft areas simultaneously.

[0006] To solve the above problems, the device for inhibiting scar hyperplasia in the ear reconstructed skin graft area provided by the present invention adopts the following technical solution: A device for inhibiting scar hyperplasia in the ear reconstructed skin graft area includes a pressure application module and a connecting structure. The pressure application module is divided into a left ear side and a right ear side. The pressure application module includes a postauricular pressure application structure and a preauricular pressure application structure. The postauricular pressure application structure has an auricular adhesion surface that fits against the skin graft site on the back of the ear from back to front, and a temporal bone adhesion surface that fits against the temporal bone skin graft site on the back of the ear in the left-right direction. The preauricular pressure application structure is installed on the postauricular pressure application structure and has a pressure application part that applies pressure to the target area on the front side of the auricle from front to back. The pressure application part of the preauricular pressure application structure and the auricular adhesion surface of the postauricular pressure application structure cooperate to clamp and apply pressure to the auricle. The connecting structure connects the left and right pressure modules and applies opposing forces in the left and right directions to the two postauricular pressure structures, so that the temporal bone of the postauricular pressure structure adheres to the skin graft site of the postauricular temporal bone.

[0007] Beneficial effects: The postauricular pressure structure in a single pressure module simultaneously incorporates both an auricular and temporal bone apposition surfaces, enabling simultaneous coverage of the skin graft sites on the back of the ear and the postauricular temporal bone. The connecting structure applies opposing forces in the left-right direction to the two postauricular pressure structures, causing the temporal bone apposition surface to exert pressure on the postauricular temporal bone skin graft site. Simultaneously, the pressure-applying part of the preauricular pressure structure cooperates with the auricular apposition surface to create an anterior-posterior clamping pressure on the auricle, meeting the requirement for bilateral pressure on the auricle. The temporal bone apposition surface provides unilateral pressure, adapting to the curved, convex structure of the postauricular temporal bone skin graft site. A single device simultaneously satisfies two different pressure directions and pressure requirements, achieving precise adaptation to different skin graft areas in the reconstructed ear.

[0008] As a further improvement, the connecting structure includes a support lever and two adjusting flaps hinged to both ends of the support lever. The front ends of the two adjusting flaps are respectively connected to two pressure modules. The connecting structure also includes an adjusting component, which is connected to the rear ends of the two adjusting flaps and adjusts the distance between the rear ends of the two adjusting flaps. When the distance between the rear ends of the two adjusting flaps increases, it causes the two postauricular pressure structures to move closer to each other to increase the pressure on the postauricular temporal bone graft site. When the distance between the rear ends of the two adjusting flaps decreases, it causes the two postauricular pressure structures to move away from each other in opposite directions to reduce the pressure on the postauricular temporal bone graft site.

[0009] Beneficial effects: By setting a support lever and two adjusting flaps hinged to both ends of the support lever, and connecting the adjusting component to the rear ends of the two adjusting flaps, synchronous reverse driving of the two pressure modules can be achieved. In use, the applied force can be controlled by changing the distance between the rear ends of the two adjusting flaps, based on the different ear spacing and skull shapes of different patients, as well as the varying pressure requirements at different postoperative stages. The swinging of the two adjusting flaps allows the pressure modules to better conform to the curved surface of the temporal bone graft site behind the ear as they move closer and further apart, avoiding localized pressure concentration or pressure blind spots.

[0010] As a further improvement, the adjusting component includes a fixed base, an adjusting knob rotatably mounted on the fixed base, and an adjusting gear fixed on the adjusting knob; The rear end of the adjusting vane is bent in the left-right direction and slides into the fixed base. The rear end of the adjusting vane is provided with a toothed segment. The top and bottom sides of the adjusting gear mesh with the toothed segments of the two adjusting vanes respectively, so that after the adjusting gear rotates, it drives the rear ends of the two adjusting vanes to move closer or further apart.

[0011] Beneficial effects: The meshing of the adjusting gear with the toothed segment at the rear end of the adjusting vane enables control of the distance between the rear ends of the two adjusting vanes. The meshing transmission between the adjusting gear and the toothed segment can convert the rotational motion of the adjusting knob into the oscillation of the adjusting vane, making the adjustment process continuous, precise and quantifiable.

[0012] As a further improvement, the rear end of the adjusting vane is provided with a gear hole for the adjusting gear to pass through in the front-rear direction, wherein the tooth segment of one adjusting vane is located on the top hole wall of the corresponding gear hole, and the tooth segment of the other adjusting vane is located on the bottom hole wall of the corresponding gear hole.

[0013] As a further improvement, the pressure-applying part of the preauricular pressure structure is used to extend from front to back into the groove region on the front side of the auricle.

[0014] Beneficial effects: The pressure-applying part extends into the groove area, allowing pressure to be applied to the high-scarring location of the skin graft area on the back of the auricle corresponding to the groove area, thus improving the adaptability to the complex anatomical shape of the auricle.

[0015] As a further improvement, the preauricular pressure structure includes a connecting seat and a pressure-applying component. The connecting seat connects the pressure-applying component and the postauricular pressure structure, and the pressure-applying part of the preauricular pressure structure is disposed on the pressure-applying component. The pressure-applying component is slidably assembled on the connecting seat to move the pressure-applying part closer to or away from the groove area on the front side of the auricle.

[0016] Beneficial effects: The pressure-applying part is adjustablely mounted on the connector, allowing the pressure-applying part to approach or move away from the groove area, thus achieving flexible adjustment of the pressure-applying position. During use, the pressure-applying part can be adjusted according to the differences in the auricle shape of different patients.

[0017] As a further improvement, the connecting seat is provided with an adjustment groove, the pressure-applying component includes a connecting post and a fastening knob, the pressure-applying part of the preauricular pressure-applying structure is provided on the connecting post, the fastening knob includes a rod part that passes through the adjustment groove and a head, the head and the connecting post are respectively placed on both sides of the connecting seat, and the fastening knob is screwed into the connecting post so that the head and the connecting post clamp the connecting seat together.

[0018] Beneficial effects: When the fastening knob is loosened, the pressure-applying component can slide freely along the adjustment groove to align with the target groove; when the fastening knob is tightened, the head clamps the connecting post to the connecting seat, achieving reliable locking; the threaded locking method is not only convenient to operate, allowing doctors to quickly assemble and adjust, but also prevents the pressure-applying component from shifting during wear, ensuring the continuity of treatment.

[0019] As a further improvement, the pressure-applying part of the preauricular pressure-applying structure is a pressure-applying soft material.

[0020] Beneficial effects: The pressure-applying part is a soft material that can better fill the preauricular groove through its own deformation, improving wearing comfort and avoiding pressure damage caused by direct contact between hard materials and the skin.

[0021] As a further improvement, the postauricular pressure structure includes a rigid pressure conduction sheet, and also includes pressure buffer pads and positioning fixation seats placed on both sides of the pressure conduction sheet. The pressure buffer pads are made of soft material, and one side of the pressure buffer pads is attached to the postauricular temporal bone skin graft site.

[0022] As a further improvement, the positioning and fixing seat is made of soft material, and the other side of the pressure buffer pad has an extension that covers the inside of the pressure transmission plate. The auricle contact surface is formed on the inside of the pressure buffer pad and the positioning and fixing seat.

[0023] The beneficial effects of this invention are as follows: The postauricular pressure structure in a single pressure module simultaneously provides an auricular apposition surface and a temporal bone apposition surface, achieving simultaneous coverage of the skin graft area on the back of the ear and the skin graft area on the postauricular temporal bone. The connecting structure applies opposing forces in the left-right direction to the two postauricular pressure structures, causing the temporal bone apposition surface to generate pressure on the postauricular temporal bone skin graft area. Simultaneously, the pressure-applying part of the preauricular pressure structure cooperates with the auricular apposition surface to form a clamping pressure on the auricle in the front-back direction, meeting the requirement of bilateral pressure on the auricle. Meanwhile, the temporal bone apposition surface achieves unilateral pressure, adapting to the curved, convex structure of the postauricular temporal bone skin graft area. One device simultaneously satisfies two different pressure directions and pressure requirements, achieving precise adaptation to different skin graft areas of the reconstructed ear. Attached Figure Description

[0024] Figure 1 A schematic diagram of the ear showing the skin graft area; Figure 2 A schematic diagram of a device for inhibiting scar hyperplasia in the skin graft area of ​​ear reconstruction; Figure 3 An exploded view of the structure that applies pressure behind the ear; Figure 4 An exploded view of the preauricular pressure structure; Figure 5 An exploded view of the connecting structure and the elastic medical bandage; Figure 6 This is a diagram illustrating how to hold the ear during use.

[0025] Explanation of reference numerals in the attached figures: 100. Pressure application module; 101. Pressure transmission plate; 102. Positioning and fixing seat; 103. Pressure buffer pad; 104. Temporal bone patency surface; 105. Extension part; 106. Auricular patency surface; 107. Connecting seat; 108. Adjustment groove; 109. Connecting post; 110. Pressure application part; 111. Fastening knob; 112. Head; 113. Rod part; 200. Connecting structure; 201. Left adjusting vane; 202. Right adjusting vane; 203. Support lever; 204. Gear perforation; 205. Left gear section; 206. Right gear section; 207. Fixed base; 208. Fixed base cover plate; 209. Adjusting gear; 210. Adjusting knob; 211. Vane perforation; 212. Knob perforation; 300. Elastic medical bandage; 400. Ear; 401. Skin graft site on the back of the ear; 402. Skin graft site on the temporal bone behind the ear; 403. Cranioauricular groove. Detailed Implementation

[0026] An embodiment of the device for inhibiting scar hyperplasia in the ear reconstructed skin graft area provided by the present invention: like Figures 2 to 6 As shown, a device for inhibiting scar hyperplasia in ear reconstructed skin graft areas (hereinafter referred to as the device) is used to simultaneously apply pressure to the skin graft site on the back of the ear and the skin graft site on the temporal bone behind the ear to prevent scar hyperplasia in both areas.

[0027] The device includes a pressure module 100, a connecting structure 200, and a flexible fastener. There are two pressure modules 100, which correspond one-to-one with the left and right ear 400. The two pressure modules 100 are divided into left ear side and right ear side. The two pressure modules 100 are connected by the connecting structure 200, which applies opposing forces to the two pressure modules 100 in the left-right direction.

[0028] The two pressure application modules 100 have identical structures. Taking one as an example, the pressure application module 100 includes a postauricular pressure application structure and a preauricular pressure application structure. The postauricular pressure application structure is connected to the connecting structure 200 and the flexible fixation member. The postauricular pressure application structure is used to apply a lateral force to the postauricular temporal bone skin graft site and an anterior force to the back of the ear skin graft site; the preauricular pressure application structure is used to apply a posterior force to the target area on the front of the auricle.

[0029] Specifically, the postauricular pressure application structure includes a pressure transmission plate 101, a positioning and fixing seat 102, and a pressure buffer pad 103. The pressure transmission plate 101 is made of a rigid material, specifically medical-grade PC plastic, and its function is to provide rigid support and pressure transmission. The positioning and fixing seat 102 is made of a soft material, specifically medical-grade silicone, and is connected to both the pressure transmission plate 101 and the preauricular pressure application structure.

[0030] The pressure buffer pad 103 is made of a soft material, specifically medical-grade flexible silicone. The pressure buffer pad 103 is mounted on the pressure transmitting sheet 101. Preferably, an installation groove is provided on the pressure transmitting sheet 101, and the pressure buffer pad 103 is inserted into the installation groove to mount the pressure buffer pad 103 onto the pressure transmitting sheet 101. Alternatively, a positioning protrusion is provided on the pressure transmitting sheet 101, and corresponding positioning grooves are provided on the pressure buffer pad 103 and the positioning fixing seat 102. The pressure transmitting sheet 101, the positioning fixing seat 102, and the pressure buffer pad 103 are fixedly mounted together through the fitting and interlocking of the positioning protrusion and the positioning groove. In other embodiments, a snap-fit ​​method can also be used to fix the pressure transmitting sheet 101, the positioning fixing seat 102, and the pressure buffer pad 103 together.

[0031] The pressure cushion 103, pressure conduction sheet 101, and positioning fixation base 102 are all arc-shaped structures adapted to the curved surface of the temporal bone skin graft site. The side of the pressure cushion 103 facing away from the pressure conduction sheet 101 adheres to the temporal bone skin graft site behind the ear during use; this side serves as the temporal bone adhesion surface 104. The other side of the pressure cushion 103 has an extension portion 105 extending into the inner side of the pressure conduction sheet 101. The function of the extension portion 105 is to prevent the rigid pressure conduction sheet 101 from directly contacting the skin graft site 401 behind the ear, thus preventing damage to the auricle. The pressure cushion 103 with the extension portion 105 and the inner side of the positioning fixation base 102 adhere together to the skin graft site 401 behind the ear during use; this inner side serves as the auricle adhesion surface 106.

[0032] In actual use, both the auricle fitting surface 106 and the temporal bone fitting surface 104 need to be custom-made according to the actual situation of the patient's reconstructed ear. The pressure cushioning pad 103 plays a role in pressure buffering and uniform transmission, and its soft properties can protect the skin from damage.

[0033] The function of the preauricular pressure structure is to apply pressure to the target area in front of the auricle, with the pressure direction from front to back. The preauricular pressure structure and the postauricular pressure structure together clamp the auricle in the front-back direction.

[0034] The preauricular pressure structure includes a connecting seat 107 and a pressure-applying component. The connecting seat 107 is mounted on the postauricular pressure structure, specifically on the positioning and fixing seat 102. The connecting seat 107 is a sheet-like structure made of transparent medical-grade PC material and is detachably fixed to the positioning and fixing seat 102 via clips. Since the positioning and fixing seat 102, pressure transmission sheet 101, and pressure buffer pad 103 are all arc-shaped, while the connecting seat 107 is semi-circular, the connecting seat 107 has a portion located on the front side of the auricle. This portion has an adjustment groove 108 that extends through the connecting seat 107 in a left-right direction. Here, the adjustment groove 108 is an elongated groove, and there are three adjustment grooves 108. The middle adjustment groove 108 is perpendicular to the straight edge of the connecting seat 107, while the other two adjustment grooves 108 are arranged at an angle to the straight edge of the connecting seat 107.

[0035] The pressure-applying component includes a connecting post 109, a pressure-applying part 110, and a fastening knob 111. The connecting post 109 is made of 304 stainless steel and is located inside the connecting seat 107. Here, "inner side" refers to the side facing the center of the patient's head in a left-right direction. The connecting post 109 extends left and right, and its end face facing the connecting seat 107 has a threaded hole. The pressure-applying part 110 is a pressure-applying soft material, specifically made of high-density medical sponge. The high-density medical sponge is fitted over the end of the connecting post 109. In use, the pressure-applying part 110 extends into the groove area on the front of the auricle, applying pressure to the front of the auricle using the side of the pressure-applying part 110. In actual use, the size needs to be cut by the doctor on-site according to the patient's auricle structure, or different sizes can be directly replaced. In other embodiments, the pressure-applying soft material can also be an elastic polymer material.

[0036] The fastening knob 111 is made of 304 stainless steel. The fastening knob 111 includes a head 112 with a larger diameter and a rod 113 with a smaller diameter. The rod 113 of the fastening knob 111 passes through the adjustment groove 108 and is screwed into the threaded hole of the connecting post 109. The head 112 of the fastening knob 111 and the connecting post 109 together clamp the connecting seat 107, thereby fixing the pressure-applying component on the connecting seat 107.

[0037] When the fastening knob 111 is loosened, the connecting post 109 and the fastening knob 111 can slide along the adjustment groove 108. When sliding, they can approach or move away from the groove area on the front side of the auricle. The purpose is to move the pressure part 110 a corresponding distance according to the actual shape of the auricle of different patients, so that the pressure part 110 can fit more closely into the groove area on the front side of the auricle.

[0038] In actual use, the number of pressure-applying components can be increased or decreased as needed, and one pressure-applying component can simultaneously correspond to multiple groove areas.

[0039] The connecting structure 200 includes a left adjusting wing 201, a right adjusting wing 202, a support lever 203, and an adjusting component. The front end of the left adjusting wing 201 is connected to the left pressure module 100, and the front end of the right adjusting wing 202 is connected to the right pressure module 100. The support lever 203 extends to the left and right and is connected between the left adjusting wing 201 and the right adjusting wing 202. The adjusting component is connected to the rear ends of the left adjusting wing 201 and the right adjusting wing 202. The function of the adjusting component is to adjust the distance between the rear ends of the left adjusting wing 201 and the right adjusting wing 202.

[0040] The left adjusting vane 201 and the right adjusting vane 202 are both made of metal and have the same structure. The overall shape of the left adjusting vane 201 and the right adjusting vane 202 is L-shaped. The front ends of the left adjusting vane 201 and the right adjusting vane 202 are respectively connected to the pressure transmission plate 101 on the corresponding side. In actual processing, the pressure transmission plate 101 can be injection molded onto the front ends of the left adjusting vane 201 and the right adjusting vane 202.

[0041] The rear ends of the left adjusting wing 201 and the right adjusting wing 202 are bent in the left and right direction, and the rear ends of the left adjusting wing 201 and the right adjusting wing 202 extend in the direction of approaching each other. The rear ends of the left adjusting wing 201 and the right adjusting wing 202 are arc-shaped structures that arch backward.

[0042] Both the left adjusting vane 201 and the right adjusting vane 202 have left-right extending gear holes 204 at their rear ends. The gear holes 204 are oblong holes that pass through the left adjusting vane 201 and the right adjusting vane 202 in the front-back direction. The bottom wall of the gear hole 204 in the left adjusting vane 201 has a left tooth segment 205, and the top wall of the gear hole 204 in the right adjusting vane 202 has a right tooth segment 206.

[0043] The support lever 203 extends to the left and right. The support lever 203 is made of metal, and its left and right ends are hinged to the left adjusting vane 201 and the right adjusting vane 202, respectively, allowing the left and right adjusting vanes 201 and 202 to swing left and right for adjustment. The front and rear ends of the left and right adjusting vanes 201 and 202 are located on the front and rear sides of the support lever 203, respectively, forming a lever-like structure between the left adjusting vane 201 and the support lever 203, and between the right adjusting vane 202 and the support lever 203. When the rear ends of the left adjusting vane 201 and the right adjusting vane 202 are driven to move closer to each other, the distance between the rear ends of the two adjusting vanes decreases, and the front ends of the left adjusting vane 201 and the right adjusting vane 202 move away from each other in opposite directions, increasing the distance between the front ends of the two adjusting vanes; when the rear ends of the left adjusting vane 201 and the right adjusting vane 202 are driven to move away from each other, the distance between the rear ends of the two adjusting vanes increases, and the front ends of the left adjusting vane 201 and the right adjusting vane 202 move closer to each other in opposite directions, decreasing the distance between the front ends of the two adjusting vanes.

[0044] The adjusting components include a fixed base 207, a fixed base cover 208, an adjusting gear 209, and an adjusting knob 210. The fixed base cover 208 is mounted on the fixed base 207, the adjusting gear 209 is located inside the fixed base 207, and the adjusting knob 210 is connected to the adjusting gear 209 and is rotatably mounted on the fixed base 207.

[0045] The fixing base 207 is made of rigid plastic and has an arc-shaped box structure with the opening facing forward. Both the left and right sides of the fixing base 207 have wing-shaped through holes 211 that penetrate the inner wall of the fixing base 207. The wing-shaped through hole 211 on the left side is located at the rear of the fixing base 207, and the wing-shaped through hole 211 on the right side is located at the front of the fixing base 207. The rear side of the fixing base 207 has a knob through hole 212 that penetrates the inner wall of the fixing base 207.

[0046] The internal space of the fixed base 207 is used to accommodate the left adjusting vane 201, the right adjusting vane 202 and the adjusting gear 209, which serves to protect the internal structure and stabilize the shape.

[0047] The fixing base cover plate 208 is made of rigid plastic and is used to fasten and close the front opening of the fixing base 207. Specifically, the fixing base cover plate 208 is snapped together with the fixing base 207, which is a conventional method and will not be described in detail here. The fixing base cover plate 208 is installed after the fixing base 207, and the two together form a closed space.

[0048] The fixed base cover plate 208 also has a knob through hole 212, which is directly opposite to the knob through hole 212 on the fixed base 207, so that the adjustment knob 210 can pass through and support the adjustment knob 210.

[0049] The adjusting gear 209 is located inside the fixed base 207 and is made of metal. In other embodiments, the adjusting gear 209 may also be made of plastic.

[0050] The adjustment knob 210 is made of ABS material and is a non-slip knob. The rod 113 of the adjustment knob 210 passes through the fixed base 207, the adjustment gear 209 and the fixed base cover plate 208 in sequence. The adjustment knob 210 is fixedly connected to the adjustment gear 209 and can drive the adjustment gear 209 to rotate.

[0051] During assembly, the rear end of the left adjusting vane 201 passes through the left vane perforation 211, and the rear end of the right adjusting vane 202 passes through the right vane perforation 211. The rear ends of both the left adjusting vane 201 and the right adjusting vane 202 are inserted into the fixed base 207. The adjusting gear 209 is placed in the fixed base 207 and passes through the gear perforations 204 of the left adjusting vane 201 and the right adjusting vane 202 in the front-back direction. The adjusting gear 209 meshes with both the left adjusting vane 201 and the right adjusting vane 202. The top of the adjusting gear 209 meshes with the right tooth segment 206 of the right adjusting vane 202, and the bottom of the adjusting gear 209 meshes with the left tooth segment 205 of the left adjusting vane 201. The adjustment knob 210 passes through the fixed base 207, the adjustment gear 209, and the fixed base cover plate 208 in sequence. When the adjustment knob 210 is rotated, it can drive the adjustment gear 209 to rotate, thereby causing the rear ends of the left adjustment vane 201 and the right adjustment vane 202 to move closer or further apart. Then, the fixed base cover plate 208 is fastened onto the fixed base 207.

[0052] The flexible fixation element here is an elastic medical bandage 300, with both ends fixed to the two pressure-conducting structures behind the ears, specifically to the pressure-conducting plates 101 of the pressure-conducting structures behind the ears. This can be achieved using conventional methods such as bolt connections. In other embodiments, the flexible fixation element can be a headband with adjustable length. Specifically, the headband consists of two separate parts, each connected to the pressure-conducting plates 101 on the left and right sides respectively. The two parts are connected by Velcro, and the length is adjusted using the Velcro.

[0053] In use, the pressure cushion 103 and pressure application part 110 are cut or selected according to the shape of the patient's ear 400. The two pressure application modules 100 are assembled together with the connecting structure 200, and the elastic medical bandage 300 is connected to the two pressure application modules 100. The left adjusting wing 201 and the right adjusting wing 202 are inserted into the fixed base 207, the adjusting gear 209 is placed in the fixed base 207, and the adjusting gear 209 is engaged with the left tooth segment 205 and the right tooth segment 206. Then the adjusting knob 210 is inserted, and the fixed base cover plate 208 is assembled on the fixed base 207.

[0054] Rotate the adjustment knob 210 to adjust the distance between the two pressure modules 100 until they initially clamp the temporal bone graft sites behind both ears. Insert the fastening knob 111 into the adjustment groove 108 and screw it onto the connecting post 109, but do not tighten it completely. Slide the connecting post 109 and the fastening knob 111 until the pressure part 110 fits against the groove area, then tighten the fastening knob 111. The pressure part 110 and the postauricular pressure structure together clamp the auricle from front to back. Continue to rotate the adjustment knob 210 to further fine-tune the distance between the two pressure modules 100 until they accurately and stably clamp the temporal bone graft sites behind both ears.

[0055] In this embodiment, the postauricular pressure application structure includes a pressure cushioning pad 103, a pressure conducting sheet 101, and a positioning and fixing seat 102 connected in sequence. The pressure conducting sheet 101 is made of rigid material. To prevent the inner side of the pressure conducting sheet 101 from conforming to the ear, the extension portion 105 of the pressure cushioning pad 103 extends to the inner side of the pressure conducting sheet 101. In other embodiments, the pressure cushioning pad 103 can completely cover the pressure conducting sheet 101, relying on the pressure conducting sheet 101 for rigid support, while relying on the pressure cushioning pad 103 for applying force and protection.

[0056] In this embodiment, the pressure-applying component includes a connecting post 109 and a fastening knob 111. The rod 113 of the fastening knob 111 passes through the adjusting groove 108 on the connecting seat 107, and the head 112 of the fastening knob 111 clamps the connecting seat 107 together with the connecting post 109. In other embodiments, the pressure-applying component may include a slider and a lead screw. The slider is slidably assembled in the adjusting groove 108, and the connecting post 109 is fixedly installed on the slider. The lead screw passes through the slider and is threadedly connected to the slider. When the lead screw is rotated, it can drive the slider and the connecting post 109 to slide. After the pressure-applying part 110 is in place, the lead screw stops rotating, and the slider and the connecting post 109 remain in the corresponding positions.

[0057] In other embodiments, the position of the pressure-applying component on the connecting seat 107 is not adjustable. For example, a circular hole is made in the connecting seat 107 for the head 112 of the fastening knob 111 to pass through. In this case, the pressure-applying part 110 is cut on-site, and then the connecting post 109 is fixed together with the fastening knob 111. If it is not up to standard, the pressure-applying part 110 is recut.

[0058] In this embodiment, gear through holes 204 are provided on both adjusting vanes. To allow the adjusting gear 209 to mesh with both the left tooth segment 205 and the right tooth segment 206 simultaneously, the rear ends of the two adjusting vanes are staggered. In other embodiments, the gear through holes 204 are not provided on the two adjusting vanes. The left adjusting vane 201 retains only the lower half of the left tooth segment 205, and the right adjusting vane 202 retains only the upper half of the right tooth segment 206. In this case, the left tooth segment 205 and the right tooth segment 206 can be arranged vertically opposite each other.

[0059] In this embodiment, the adjusting component uses the rotating adjusting gear 209 to change the distance between the rear ends of the two adjusting vanes. The purpose of setting up the adjusting component is to change the distance between the rear ends of the two adjusting vanes. In other embodiments, the following method can be used: The adjusting component includes a fixed base, a left slider, a right slider, and a bidirectional lead screw. The left slider is fixedly connected to the rear end of the left adjusting vane 201, and the right slider is fixedly connected to the rear end of the right adjusting vane 202. Both the left and right sliders are slidably mounted on the fixed base in the left-right direction. The bidirectional lead screw is rotatably mounted in the fixed base around the left-right extending axis, and the threads at both ends of the bidirectional lead screw are opposite in direction, with the left end connected to the left slider and the right end connected to the right slider. In use, a hole can be made in the fixed base so that a person can reach into the fixed base to move the bidirectional lead screw. After the bidirectional lead screw rotates, it can drive the left and right sliders to move relative to each other, thereby changing the distance between the rear ends of the left and right adjusting vanes 202.

[0060] In this embodiment, the connecting structure 200 can change the distance between the two pressure-applying modules 100, thereby adjusting the pressure on the skin graft site behind the ear. In other embodiments, the connecting structure 200 may only serve to connect the two pressure-applying modules 100 and apply force to them. For example, the connecting structure 200 may be a metal clip with its two ends connected to the two pressure-applying modules 100 respectively.

[0061] In this embodiment, the two pressure application modules 100 are connected by a connecting structure 200 and a flexible fastener. In other embodiments, the flexible fastener can be omitted, and the two pressure application modules 100 can be fixed to the patient's head solely by the connecting structure 200. In this case, the position of the connecting structure 200 on the patient's head needs to be changed, for example, the connecting structure 200 can be clamped to the top of the patient's head.

[0062] In other embodiments, the materials of the pressure transmission plate 101, positioning and fixing seat 102, pressure buffer pad 103, pressure application part 110 and adjustment wing in the connecting structure 200 in the pressure application module 100 can be changed as needed.

[0063] In addition, in the description of this specification, "multiple" means at least two, such as two, three or more, etc., unless otherwise expressly and specifically defined.

[0064] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A device for inhibiting scar hyperplasia in the skin graft area of ​​ear reconstruction, characterized in that, The device includes a pressure application module and a connecting structure. The pressure application module is divided into a left ear side and a right ear side. The pressure application module includes a postauricular pressure application structure and a preauricular pressure application structure. The postauricular pressure application structure has an auricular adhesion surface that fits with the skin graft site on the back of the ear from back to front, and a temporal bone adhesion surface that fits with the skin graft site on the back of the ear from left to right. The preauricular pressure application structure is installed on the postauricular pressure application structure and has a pressure application part that applies pressure to the target area on the front side of the auricle from front to back. The pressure application part of the preauricular pressure application structure and the auricular adhesion surface of the postauricular pressure application structure work together to clamp and apply pressure to the auricle. The connecting structure connects the left and right pressure modules and applies opposing forces in the left and right directions to the two postauricular pressure structures, so that the temporal bone of the postauricular pressure structure adheres to the skin graft site of the postauricular temporal bone.

2. The device for inhibiting scar hyperplasia in the ear reconstructed skin graft area according to claim 1, characterized in that, The connecting structure includes a support lever and two adjusting flaps hinged to both ends of the support lever. The front ends of the two adjusting flaps are respectively connected to two pressure modules. The connecting structure also includes an adjusting component, which is connected to the rear ends of the two adjusting flaps and adjusts the distance between the rear ends of the two adjusting flaps. When the distance between the rear ends of the two adjusting flaps increases, it causes the two postauricular pressure structures to move closer to each other to increase the pressure on the postauricular temporal bone graft site. When the distance between the rear ends of the two adjusting flaps decreases, it causes the two postauricular pressure structures to move away from each other in opposite directions to reduce the pressure on the postauricular temporal bone graft site.

3. The device for inhibiting scar hyperplasia in the ear reconstructed skin graft area according to claim 2, characterized in that, The adjusting component includes a fixed base, an adjusting knob rotatably mounted on the fixed base, and an adjusting gear fixed on the adjusting knob; The rear end of the adjusting vane is bent in the left-right direction and slides into the fixed base. The rear end of the adjusting vane is provided with a toothed segment. The top and bottom sides of the adjusting gear mesh with the toothed segments of the two adjusting vanes respectively, so that after the adjusting gear rotates, it drives the rear ends of the two adjusting vanes to move closer or further apart.

4. The device for inhibiting scar hyperplasia in the ear reconstructed skin graft area according to claim 3, characterized in that, The rear end of the adjusting vane is provided with a gear hole for the adjusting gear to pass through in the front-back direction. The tooth segment of one adjusting vane is located on the top hole wall of the corresponding gear hole, and the tooth segment of the other adjusting vane is located on the bottom hole wall of the corresponding gear hole.

5. The device for inhibiting scar hyperplasia in the ear reconstructed skin graft area according to any one of claims 1-4, characterized in that, The pressure-applying part of the preauricular pressure structure is used to extend from front to back into the groove region on the front side of the auricle.

6. The device for inhibiting scar hyperplasia in the ear reconstructed skin graft area according to claim 5, characterized in that, The preauricular pressure structure includes a connecting seat and a pressure-applying component. The connecting seat connects the pressure-applying component and the postauricular pressure structure. The pressure-applying part of the preauricular pressure structure is disposed on the pressure-applying component. The pressure-applying component is slidably assembled on the connecting seat to move the pressure-applying part closer to or away from the groove area on the front side of the auricle.

7. The device for inhibiting scar hyperplasia in the ear reconstructed skin graft area according to claim 6, characterized in that, The connecting seat is provided with an adjustment groove. The pressure-applying component includes a connecting post and a fastening knob. The pressure-applying part of the preauricular pressure-applying structure is located on the connecting post. The fastening knob includes a rod that passes through the adjustment groove and a head. The head and the connecting post are located on both sides of the connecting seat. The fastening knob is screwed into the connecting post so that the head and the connecting post clamp the connecting seat together.

8. The device for inhibiting scar hyperplasia in the ear reconstructed skin graft area according to any one of claims 1-4, characterized in that, The pressure-applying part of the preauricular pressure structure is a pressure-applying soft material.

9. The device for inhibiting scar hyperplasia in the ear reconstructed skin graft area according to any one of claims 1-4, characterized in that, The postauricular pressure structure includes a rigid pressure conduction sheet, as well as pressure buffer pads and positioning fixation seats placed on both sides of the pressure conduction sheet. The pressure buffer pads are made of soft material, and one side of the pressure buffer pads is attached to the postauricular temporal bone skin graft site.

10. The device for inhibiting scar hyperplasia in the ear reconstructed skin graft area according to claim 9, characterized in that, The positioning and fixing seat is made of soft material, and the other side of the pressure buffer pad has an extension that covers the inside of the pressure transmission plate. The auricle contact surface is formed on the inside of the pressure buffer pad and the positioning and fixing seat.

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