A patch for penile plastic surgery

Abstract

This invention provides a patch for penile plastic surgery, belonging to the field of medical plastic surgery device technology, to solve the technical problem of poor conformability of conventional patches in the prior art. The patch is a sheet-like body made of acellular allogeneic dermal material, and the sheet-like body is perforated into a mesh structure by multiple through-units. This design can significantly improve the conformability of the patch, not only allowing the patch to better conform to the shape of the penis, reducing postoperative discomfort, but also promoting postoperative recovery.

Description

Technical Field

[0001] This utility model relates to the field of medical plastic surgery device technology, specifically to a patch for penile plastic surgery. Background Technology

[0002] In penile plastic surgery, patches are widely used as an important implant to increase penile size. However, traditional penile plastic surgery patches have many shortcomings in terms of biocompatibility and compliance.

[0003] In terms of biocompatibility, conventional patches are prone to causing immune rejection, inflammation, and infection, and the degradation products of the patch material may also affect tissue repair. Regarding penile deformities, conventional patches, due to their incompatibility with penile tissue, cause patients to experience significant pulling, binding, and discomfort. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model proposes a patch for penile plastic surgery to solve the technical problem of poor conformity of conventional patches in the existing technology.

[0005] The technical solution adopted by this utility model is a patch for penile plastic surgery. The patch is a sheet-like body made of decellularized allogeneic dermal material, and the sheet-like body is hollowed out into a mesh structure by multiple through units.

[0006] Optionally, the penetrating units are evenly distributed on the patch, and each penetrating unit includes a central penetrating area and a peripheral penetrating area, with four peripheral penetrating areas circumferentially spaced around the outer periphery of the central penetrating area.

[0007] Optionally, the patch has a first state of being unfolded into a plane and a second state of being rolled into a frustum.

[0008] Optionally, the patch is an isosceles trapezoid.

[0009] Optionally, the mesh structure includes a first mesh group and a second mesh group, wherein the mesh strips within the same mesh group are parallel to each other, and the mesh strips between the two mesh groups are interlaced.

[0010] Optionally, when the sheet is in the second state of being rolled into a frustum, the strips in the first and second strip groups extend spirally along the circumference.

[0011] Optionally, the spiral angles of the strips in the first strip group and the second strip group are the same, but the spiral directions are opposite.

[0012] Optionally, the patch comprises at least two layers, each with the same structure, but with staggered cutout areas between them.

[0013] Optionally, the patch has a border around its outer periphery.

[0014] Optionally, one set of opposite sides of the sheet-like body is connected with absorbable lines, and the absorbable lines are spaced apart along the side length direction.

[0015] As can be seen from the above technical solution, the beneficial technical effects of this utility model are as follows:

[0016] The penile plastic surgery patch provided by this invention is made of acellular allogeneic dermal material into a sheet-like body, and its mesh structure is formed by multiple through-cell perforations, significantly improving the patch's conformability. This design not only allows the patch to better conform to the shape of the penis, reducing postoperative discomfort, but also promotes tissue ingrowth and fusion, enhances the patch's stability, and accelerates postoperative recovery. Furthermore, the decellularization process eliminates immunogenicity, improves biocompatibility, and ensures the safety and effectiveness of the surgery. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 This is a schematic diagram of the trapezoidal patch of this utility model;

[0019] Figure 2 This is a schematic diagram of the rectangular patch of this utility model;

[0020] Figure 3 This is a schematic diagram of the trapezoidal patch with a frame of this utility model;

[0021] Figure 4 This is a schematic diagram of the through-hole unit of this utility model;

[0022] Figure 5 This is a schematic diagram of the rolled patch of this utility model;

[0023] Figure 6 This is an optimized schematic diagram of the through-hole unit of this utility model.

[0024] Reference numerals: penetrating unit 101, central penetrating area 1010, peripheral penetrating area 1011, first mesh group 102, second mesh group 103, border 11, absorbable line 12. Detailed Implementation

[0025] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0026] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0027] To facilitate understanding of this technical solution, the application scenarios of the patch in this solution will be briefly introduced below. Penile plastic surgery achieves thickening and / or lengthening effects by implanting a patch. The routine surgical procedure is as follows: During the operation, a circular incision is first made at the base of the penis. A cavity is formed by blunt dissection of the loose connective tissue space between the deep fascia layer and the tunica albuginea. After measuring the penile circumference, the patch is trimmed to the appropriate size and evenly wrapped around the surface of the corpora cavernosa. The edges of the patch are fixed to the tunica albuginea and deep fascia layer at multiple points to ensure that the patch fits snugly without wrinkles. Finally, the incision is sutured layer by layer. This procedure achieves thickening or other surgical purposes by increasing the thickness of soft tissue. The patch material must have good biocompatibility to reduce the risk of rejection. During the postoperative recovery period, strenuous activity should be avoided to prevent patch displacement.

[0028] The following is an embodiment of a patch for penile plastic surgery according to this solution, one possible implementation is as follows:

[0029] The patch is a sheet-like structure made of decellularized allogeneic dermal material. The sheet-like structure is perforated into a mesh structure by multiple through-units 101. (See reference...) Figures 1-3 Acellular allogeneic dermal materials are not absorbed by the human body. Instead, they integrate with the body's own tissues after the recovery period, becoming part of the body's own tissues.

[0030] Acellular allogeneic dermal material (ADM-H) is a cell-free, non-bacterial, non-toxic, non-irritating, and immune-rejection-free tissue engineering material with an intact basement membrane after epidermal removal and decellularization. It is milky white in appearance, elastic, soft in texture, and does not fracture, making it an ideal permanent soft tissue replacement material currently available for clinical use. Acellular allogeneic dermal material completely preserves the morphology, structure, and composition of the extracellular matrix, and can induce regenerative fibroblasts and vascular endothelial cells to grow into its framework. It also completely preserves the basement membrane, which lies between the epidermis and dermis, playing a crucial role in cell growth and differentiation.

[0031] In summary, acellular allogeneic dermal material is a biomaterial that is processed to remove all cellular components from the skin of a human donor while retaining the extracellular matrix. This material exhibits good tissue compatibility and low immunogenicity.

[0032] In the above embodiments, the sheet-like acellular allogeneic dermal material is perforated into a mesh structure, increasing the patch's conformability and giving it better deformability based on its original physical properties. On the one hand, during surgery, the patch material can be prepared preoperatively based on the preliminary assessment results. Even if slight differences in size are found after incising the tissue during surgery, it does not affect the use of the patch, avoiding the need for re-cutting the patch during surgery, thereby shortening the surgical cycle, reducing waiting time after tissue incision, and lowering surgical risks. On the other hand, during the patient's recovery and normal life after surgery, the conformability provided by the mesh structure of the patch can better adapt to changes in penile shape to address penile deformation, and the acellular allogeneic dermal material can increase compatibility, working together to reduce patient discomfort. In the later stages of recovery, the acellular allogeneic dermal material can fuse with the patient's own tissue to become autologous tissue, achieving excellent recovery results.

[0033] The compliance mentioned above refers to the ability of a material to deform under stress to adapt to surrounding tissues. In the biomedical field, highly compliant patches can naturally stretch with physiological activities, reducing the feeling of a foreign body and lowering the risk of inflammation or displacement caused by mechanical mismatch.

[0034] The mechanism by which the above-mentioned patches increase compliance is:

[0035] In terms of materials, decellularized allogeneic dermal material forms a three-dimensional mesh scaffold by retaining the natural extracellular matrix, and its microstructure is highly similar to that of human tissue. This natural component endows the material with excellent biomechanical properties: the collagen structure within the material provides tensile strength, and elastin provides elasticity, allowing the patch to deform in accordance with the surrounding tissue when subjected to stress. The decellularization process removes immunogenic cellular components while preserving the natural conformation of the matrix proteins, avoiding material hardening caused by chemical cross-linking, and allowing the patch to maintain flexibility and extensibility close to that of native tissue. When external forces are applied, the material's molecular chains can dissipate energy through physical mechanisms such as slippage and extension, achieving dynamic compliance regulation, rather than through rigid resistance leading to interfacial stress concentration.

[0036] Structurally, the mesh-like perforated structure achieves a dual improvement in compliance through topology: First, the pore array reduces the overall modulus of the material, forming a flexible framework similar to a "spring mesh." When external force is applied, stress-induced local deformation occurs at the pore edges, absorbing the deformation through geometric deformation, making the macroscopic patch easier to bend and stretch with the tissue. Second, the penetrating pores provide ingrowth channels for surrounding tissues, allowing fibroblasts and other cells to quickly infiltrate the pores post-surgery, forming a "bio-anchoring effect" and accelerating the fusion process between the patch and the autologous tissue. This cell-material chimera structure enables the patch to achieve micro-movement synchronization with the host tissue. During physiological activities (such as penile erection), the patch can extend synchronously with the expansion of the corpora cavernosa, rather than sliding and rubbing as an independent foreign object. The periodic arrangement of the pores also homogenizes stress distribution, avoiding compliance decay caused by material fatigue.

[0037] This embodiment, based on the previous embodiment, provides a through-hole unit 101 of a specific shape and its distribution. Specifically, the through-hole units 101 are evenly distributed on the patch, and each through-hole unit 101 includes a central through-hole area 1010 and peripheral through-hole areas 1011. The four peripheral through-hole areas 1011 are circumferentially and equally spaced around the central through-hole area 1010. (See reference...) Figure 4 In one possible scheme, both the central penetrating area 1010 and the peripheral penetrating areas 1011 are quadrilaterals, such as rectangles or parallelograms, see [reference needed]. Figure 4 In a more specific implementation, Figure 4 A is 3mm and B is 7mm, and the through units 101 are arranged at a spacing of 10mm.

[0038] The junctions between the central through-area 1010 and the surrounding through-area 1011 can use rounded corners for transition, such as... Figure 6 As shown. This attention to detail effectively avoids the problem of localized stress concentration caused by right angles, making the entire structure more stable and smoother under stress and deformation. Even during significant deformation, no sharp-angle clamping zone will form, thereby reducing the risk of structural damage caused by stress concentration, improving the overall reliability and durability of the structure, and enhancing the user experience.

[0039] Corresponding to the previous embodiment, this embodiment provides a specific shape of the mesh structure. Specifically, the mesh structure includes a first mesh group 102 and a second mesh group 103. The mesh strips within the same mesh group are parallel to each other, and the mesh strips between the two mesh groups are interlaced, such as... Figures 1-3 As shown.

[0040] In the above embodiments, the first mesh group 102 and the second mesh group 103 interweave to form a mesh structure. This mesh structure is also formed by the specific shape and arrangement of the through-units 101. Macroscopically, the mesh structure is quadrilateral, possessing good deformability. By controlling the arrangement of the through-units 101, rectangular, parallelogram, and other meshes can be formed. Taking a parallelogram mesh as an example, microscopically, due to the special shape of the through-units 101, each side of the parallelogram mesh is composed of multiple segmented sections, giving it a larger tensile deformation and thus increasing its compliance. In summary, macroscopically, the parallelogram mesh endows the material with anisotropic deformation capabilities; microscopically, the spliced ​​edges form a stepped shape, allowing the mesh to unfold in multiple directions during uniaxial tension. The maximum tensile amount is significantly increased compared to a straight-edged quadrilateral, resulting in higher dynamic compliance and better matching with physiological movements.

[0041] In this embodiment, the patch has a first state of being unfolded into a plane and a second state of being rolled into a frustum, where a frustum refers to a special cylindrical surface with one end having a larger diameter than the other. When the patch is in the second state of being rolled into a frustum, the mesh strips in the first mesh group 102 and the second mesh group 103 extend spirally along the circumference. To ensure that the patch, after being rolled into a circle, can fit snugly and maintain a consistent amount of deformation when implanted into the penis, the patch can be designed as an isosceles trapezoid. For example, a trapezoidal shape with an upper base of 7cm, a lower base of 8cm, and a height of 8cm, with the outer periphery rounded (e.g., trimmed) to avoid sharp corners. The mesh strips in the first mesh group 102 and the second mesh group 103 have the same spiral angle but opposite spiral directions. For example, using the axis of the patch rolled into a frustum as a reference line, the first mesh group 102 can be rotated clockwise at an angle of 45 degrees; while the second mesh group 103 can be rotated counterclockwise at an angle of 45 degrees.

[0042] In the above embodiment, the first mesh group 102 and the second mesh group 103 on the patch are perpendicular to each other. Macroscopically, the parallelogram mesh forms a rectangle, and the two diagonals of the rectangle are along the axial and circumferential directions of the patch rolled into a frustum, respectively, to adapt to the length and diameter deformation of the penis. In these two directions, the patch has the greatest deformation adaptability.

[0043] Based on the above embodiments, in this embodiment, the patch comprises at least two layers, each with the same structure but staggered cutout areas. Firstly, the multi-layered structure effectively increases the patch's thickness, matching the user's surgical goals and contributing to improved surgical outcomes. Simultaneously, due to the staggered cutout areas, while maintaining good conformability, the patch maintains overall thickness consistency. In the later stages of recovery, after the acellular allogeneic dermal material fuses with the patient's own tissue to become autologous tissue, the surgical thickening effect is more uniform throughout, resulting in better postoperative recovery.

[0044] In this embodiment, a border 11 is provided on the outer periphery of the patch. The patch has a unique shape. In its fabrication, a possible and simple method is to directly cut and hollow out a complete base patch. However, once the hollowing is complete, the patch becomes an interlaced grid of strips, making it inconvenient to pick up and handle, and prone to folding and sticking. The outer border frame can better solve this problem. Figure 1 and Figure 2 In practical terms, if the cutting and perforation method is used, when perforating the outer circumference, the holes intersecting with the outer circumference are ignored, thus ensuring the completeness of the outer edge of the patch and forming a border. Alternatively, after cutting and perforating, an additional border 11 can be fixed to the outer circumference, for example, using adhesive or surgical sutures.

[0045] This embodiment can be referred to. Figure 1 and Figure 2 The sheet-like body has absorbable sutures 12 connected to one set of opposite sides, with the sutures 12 spaced apart along the side length. These absorbable sutures 12 are pre-connected to one set of opposite sides of the sheet-like body and are evenly spaced along the side length. During the surgery, the surgeon can roll the sheet-like body into a circle or other desired shape as needed and then fix it using the pre-set absorbable sutures 12, ensuring that the sheet-like body maintains a stable shape during the surgery and does not affect the surgical outcome due to movement or deformation.

[0046] During the preoperative material preparation process, absorbable suture 12 is also used to bind and fix the patch mesh structure and the frame 11. After binding and fixing, a portion is left for use in the operation.

[0047] Absorbable sutures used in surgery are special suture materials, such as catgut sutures and pure natural collagen sutures, that are gradually degraded and absorbed by the body, eliminating the need for suture removal. This reduces secondary pain and the risk of infection for patients, promotes wound healing, and makes postoperative recovery more natural and convenient.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A patch for penile plastic surgery, characterized in that: The patch is a sheet made of decellularized allogeneic dermal material, and the sheet is hollowed out into a mesh structure by multiple through units (101); The patch has a first state of being unfolded into a plane and a second state of being rolled into a frustum; The patch is an isosceles trapezoid; The mesh structure includes a first mesh group (102) and a second mesh group (103), with the meshes within the same mesh group being parallel to each other and the meshes between the two mesh groups being interlaced; When the sheet is in the second state of being rolled into a frustum, the strips in the first strip group (102) and the second strip group (103) extend spirally along the circumference.

2. The patch for penile plastic surgery as described in claim 1, characterized in that: The through-units (101) are evenly distributed on the patch. The through-units (101) include a central through-area (1010) and a peripheral through-area (1011). The four peripheral through-areas (1011) are circumferentially spaced around the central through-area (1010).

3. The patch for penile plastic surgery as described in claim 1, characterized in that: The spiral angles of the first strip group (102) and the second strip group (103) are the same, but the spiral directions are opposite.

4. The patch for penile plastic surgery as described in claim 1, characterized in that: The patch comprises at least two layers, each with the same structure, but the cutout areas between them are staggered.

5. A patch for penile plastic surgery as described in any one of claims 1-4, characterized in that: The patch is provided with a border (11) around its outer periphery.

6. A patch for penile plastic surgery as described in any one of claims 1-4, characterized in that: One set of opposite sides of the sheet is connected with absorbable lines (12), and the absorbable lines (12) are spaced apart along the side length direction.

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