External analgesic pressing patch
By incorporating a cross-shaped elastic pressure balloon strip and an outwardly convex support release layer into the external anesthetic patch, the problem of uneven drug release is solved, achieving uniform drug distribution and stable anesthetic effect, thereby improving patient comfort and the smoothness of the surgical procedure.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANFANG HOSPITAL OF SOUTHERN MEDICAL UNIV
- Filing Date
- 2025-03-03
- Publication Date
- 2026-07-21
AI Technical Summary
Traditional topical anesthetic patches release medication unevenly, leading to unstable anesthetic effects. This can result in either excessive or insufficient local anesthetic application, affecting the surgical procedure and patient experience.
A topical anesthetic pressure patch has been designed, comprising a backing layer, a drug reservoir layer, a controlled-release membrane layer, an adhesive layer, and a protective layer. It has a built-in cross-shaped elastic pressure airbag strip and an outwardly convex support release layer to ensure that the drug is evenly distributed on the skin surface. It uses polyester fiber composite material and a breathable micro-mesh design to improve comfort and stability.
It achieves uniform drug release and stable anesthetic effect, improves drug utilization, reduces the risk of local overdose or underdose, and enhances the patient's wearing experience and the smooth progress of the surgical procedure.
Smart Images
Figure CN224523797U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of medical auxiliary equipment technology, especially external anesthetic pressure patch. Background Technology
[0002] Currently, topical anesthetics are mainly available in creams and patches. Creams need to be applied to the patient's skin and then covered with plastic wrap. The disadvantage is that the patient needs to cooperate with the operation, otherwise the cream may get rubbed on the skin during the application process, resulting in uneven application. Also, the plastic wrap is not stable enough and may fall off easily. Topical anesthetic patches generally contain the medication itself. The protective film needs to be torn off before applying the patch to the affected area and then pressing it down.
[0003] Traditional anesthetic patches typically lack a specialized structure to ensure uniform drug distribution from the reservoir to the skin surface. For example, the drug may concentrate in some areas while neglecting others. Furthermore, the materials and structures used in traditional anesthetic patches often lack good elasticity and adjustability, making it difficult to precisely control the drug release based on applied pressure. Uneven drug release leads to unstable local anesthesia, with some areas potentially receiving excessive anesthesia while others receive insufficient anesthesia. For instance, during surgical preparation, uneven anesthesia can cause pain during surgery, affecting the surgical process and the patient's experience. Utility Model Content
[0004] The purpose of this invention is to provide an external anesthetic pressure patch to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a topical anesthetic pressure patch, comprising a pressure patch body, the pressure patch body comprising a backing layer, a drug reservoir layer, a controlled-release membrane layer, an adhesive layer, and a protective layer sequentially bonded together; an easy-tear handle integrally connected to one corner of the protective layer; a drug reservoir layer having a drug storage cavity for storing drug inside; a first elastic pressure airbag strip horizontally fixed on the inner wall of the drug storage cavity; and a second elastic pressure airbag strip fixed on one side of the first elastic pressure airbag strip and located on the inner wall of the drug storage cavity. The first and second elastic pressure airbag strips are cross-shaped. The controlled-release membrane layer has an outwardly convex support release layer inside. The outwardly convex support release layer has a protruding structure on the side facing the drug reservoir layer. The first and second elastic pressure airbag strips, which are connected together, elastically abut against the protruding end of the outwardly convex support release layer. A drug release mesh for drug release is adhered to the back of the controlled-release membrane layer and on the inner wall of the outwardly convex support release layer. The adhesive layer has a drug release component inside to allow the drug to pass through the adhesive layer evenly to reach the skin surface.
[0006] In this preferred embodiment, the backing layer has a conforming curve portion at both edges, so that the conforming curve portion conforms to the surface of human skin.
[0007] In this preferred embodiment, the material of the backing layer is a polyester fiber composite material.
[0008] In this preferred embodiment, the surface of the backing layer is provided with breathable micro-mesh holes to prevent stuffiness during prolonged wear.
[0009] In a preferred embodiment, a reusable temporary protective film is adhered to one side of the protective layer opposite to the adhesive layer. The temporary protective film has a transparent structure and covers the outer wall of the easy-tear handle.
[0010] In a preferred embodiment, an adhesive ring is provided at the peripheral edge of the side of the adhesive layer facing away from the controlled-release membrane layer, so that the adhesive ring is tightly adhered to the skin.
[0011] In this preferred embodiment, anti-warping adhesive portions are provided at the four inner corners of the adhesive ring, and the anti-warping adhesive portions are integrally connected to the adhesive ring.
[0012] In a preferred embodiment, the adhesive layer has multiple equally spaced, segmented sections inside, each of which has a drug release micropore for releasing the drug. The drug release micropore is aligned with the outwardly convex support release layer to facilitate drug discharge.
[0013] Compared with the prior art, the technical effects and advantages of this utility model are as follows:
[0014] This topical anesthetic patch addresses the common problem of uneven drug release in traditional patches, leading to unstable anesthetic effects or local overdose. This new design features a first and second elastic pressure balloon strip arranged in a cross shape within the drug reservoir. This design allows the user to effectively control the release of medication from the reservoir when applying pressure, ensuring more precise and uniform drug release. A drug-release mesh is adhered to the back of the controlled-release film, further ensuring even distribution of the drug across the skin surface through the adhesive layer, resulting in a more stable and reliable anesthetic effect.
[0015] Traditional anesthetic patches may fail to deliver all the medication effectively to the skin due to their mediocre design, resulting in waste. This new design features a convex structure on the side facing the medication reservoir, which fits snugly against the elastic pressure-sensitive air bladder. This design not only helps to expel the medication from the reservoir cavity but also provides support, preventing leakage or deterioration during transport, thereby improving the overall utilization rate of the medication.
[0016] The backing layer is made of highly flexible and durable polyester fiber composite material, with contoured edges on both sides to ensure a comfortable fit against the skin. Furthermore, the integrated easy-tear handle on the protective layer allows for convenient removal, preventing damage or contamination due to improper handling. The backing layer surface features breathable micro-mesh to effectively reduce stuffiness during prolonged wear, enhancing the user's wearing experience. 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. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the structure of this utility model;
[0019] Figure 2 This utility model Figure 1 Enlarged structural diagram at point A;
[0020] Figure 3 This is a schematic diagram showing the disassembled structure of the backing layer, drug reservoir layer, and controlled-release membrane layer of this utility model;
[0021] Figure 4 This is a schematic diagram of the structure of the convex support release layer of this utility model;
[0022] Figure 5 This is a schematic diagram of the adhesive layer structure of this utility model.
[0023] Explanation of reference numerals in the attached figures:
[0024] In the diagram: 1. Press-fit body; 2. Backing layer; 3. Drug reservoir layer; 4. Controlled-release membrane layer; 5. Adhesive layer; 6. Protective layer; 7. Temporary protective film; 8. Easy-tear handle; 9. Adhesive curve section; 10. Breathable micro-mesh; 11. Drug reservoir cavity; 12. First elastic press-fit airbag strip; 13. Second elastic press-fit airbag strip; 14. Outwardly convex support release layer; 15. Drug release mesh; 16. Adhesive ring; 17. Anti-curling adhesive section; 18. Staged separation area; 19. Drug release micropores. Detailed Implementation
[0025] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.
[0026] This embodiment provides, for example Figures 1 to 5 The external anesthetic pressure patch shown includes a pressure patch body 1. The pressure patch body 1 includes a backing layer 2, a drug reservoir layer 3, a controlled-release membrane layer 4, an adhesive layer 5, and a protective layer 6, which are sequentially bonded together. An easy-tear handle 8 is integrally connected to one corner of the protective layer 6. The drug reservoir layer 3 has a drug storage cavity 11 for storing the drug. A first elastic pressure airbag strip 12 is horizontally fixed to the inner wall of the drug storage cavity 11. A second elastic pressure airbag strip 13 is fixed to one side of the first elastic pressure airbag strip 12 and located on the inner wall of the drug storage cavity 11. The second elastic pressure airbag strip 13 has a cross-shaped structure. The controlled-release membrane layer 4 has an outwardly convex support release layer 14 inside. The outwardly convex support release layer 14 has a protruding structure on the side facing the drug storage layer 3. The first elastic pressure airbag strip 12 and the second elastic pressure airbag strip 13 connected together elastically abut against the protruding end of the outwardly convex support release layer 14. A drug release net 15 for drug release is adhered to the back of the controlled-release membrane layer 4 and located on the inner wall of the outwardly convex support release layer 14. The adhesive layer 5 has a drug release component inside for allowing the drug to pass evenly through the adhesive layer 5 to reach the skin surface. The adhesive layer 5 is adhered to the skin. When the hand presses against the back of the backing layer 2, the pressure on the backing layer 2 and the drug reservoir layer 3 causes the first elastic pressure airbag strip 12 and the second elastic pressure airbag strip 13, which are pressed into the drug reservoir cavity 11 inside the drug reservoir layer 3, to be squeezed out through the outwardly convex support release layer 14. This allows the drug to pass through the drug release mesh 15 and the adhesive layer 5 to reach the skin surface. The outwardly convex support release layer 14 protrudes and fits into the drug reservoir cavity 11, also serving to support the drug.
[0027] In this embodiment, the backing layer 2 has a conforming curve portion 9 on both sides of its edge, so that the conforming curve portion 9 conforms to the surface of human skin.
[0028] In this embodiment, the material of the backing layer 2 is a polyester fiber composite material with high flexibility and durability.
[0029] In this embodiment, the surface of the backing layer 2 is provided with breathable micro-mesh 10 for ventilation and to prevent stuffiness during long-term wear.
[0030] In this embodiment, a reusable temporary protective film 7 is adhered to the side of the protective layer 6 facing away from the adhesive layer 5. The temporary protective film 7 is a transparent film structure and covers the outer wall of the easy-tear handle 8. The design of the temporary protective film 7 can prevent the protective layer 6 from accidentally falling off during transportation. When it is necessary to remove the protective layer 6, the protective layer 6 and the temporary protective film 7 can be torn off together by pulling the easy-tear handle 8.
[0031] In this embodiment, an adhesive ring 16 is provided on the peripheral edge of the side of the adhesive layer 5 facing away from the controlled-release membrane layer 4, so that the adhesive ring 16 is tightly adhered to the skin.
[0032] In this embodiment, anti-lifting adhesive portions 17 are provided at the four inner corners of the adhesive ring 16, and the anti-lifting adhesive portions 17 are integrally connected to the adhesive ring 16. This increases the contact area between the anti-lifting adhesive portions 17 and the skin, preventing lifting. An adhesive ring 16 is provided around the peripheral edge of the side of the adhesive layer 5 facing away from the controlled-release film layer 4, and is equipped with anti-lifting adhesive portions 17. These designs not only enhance the adhesion between the patch and the skin but also effectively prevent the risk of edge lifting, improving the safety and stability of use.
[0033] In this embodiment, the adhesive layer 5 has multiple equally spaced staged partitions 18 inside, and each staged partition 18 has a drug release micropore 19 for releasing the drug. The drug release micropore 19 is aligned with the outwardly convex support release layer 14 to allow the drug to be discharged.
[0034] Working principle:
[0035] Before use, the protective layer 6 and temporary protective film 7 of this topical anesthetic pressure patch are peeled off together using the easy-tear handle 8. This step ensures that the adhesive layer 5 will not accidentally adhere to unwanted locations when not in use. After removing the protective layer, the adhesive layer 5 of the pressure patch body 1 is directly applied to the skin area that needs anesthesia. Due to the presence of the adhesive ring 16, the pressure patch can be firmly fixed to the skin, while the anti-lifting adhesive part 17 further enhances the sealing and stability of the edges.
[0036] The user's hand begins to apply pressure to the backing layer 2. This pressure is transmitted to the drug reservoir layer 3, which contains a drug storage cavity 11 storing anesthetic. Inside the drug storage cavity 11, a first elastic pressing airbag strip 12 and a second elastic pressing airbag strip 13 are arranged in a cross shape. When pressure is applied, these elastic pressing airbag strips are compressed, pushing the anesthetic stored in the drug storage cavity 11 toward the controlled-release membrane layer 4. The controlled-release membrane layer 4 has an outwardly convex support release layer 14, which protrudes towards the drug reservoir layer 3. The first elastic pressing airbag strip 12 and the second elastic pressing airbag strip 13, connected together, elastically abut against the protruding end of the outwardly convex support release layer 14, ensuring that the drug can be effectively squeezed out.
[0037] A drug-release mesh 15 is adhered to the back of the outward-convex support release layer 14. The design of the drug-release mesh allows the drug to be evenly distributed and pass through the adhesive layer 5 to reach the skin surface. Furthermore, each of the multiple equidistantly spaced, staged sections 18 within the adhesive layer 5 is equipped with drug-release micropores 19, ensuring that the drug is released gradually and in a controlled manner. As the user continues to apply pressure to the hand, the drug continuously permeates from the drug reservoir 11 through the outward-convex support release layer 14 and the drug-release mesh 15 into the adhesive layer 5, ultimately reaching the skin surface to achieve a local anesthetic effect. Simultaneously, the presence of breathable micro-mesh 10 helps reduce the stuffiness that may occur during prolonged wear, improving the user experience.
[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A topical anesthetic pressure patch, comprising a pressure patch body (1), characterized in that: The press-fit body (1) includes a backing layer (2), a drug reservoir layer (3), a controlled-release membrane layer (4), an adhesive layer (5), and a protective layer (6) bonded together in sequence. An easy-tear handle (8) is integrally connected to one corner of the protective layer (6). The drug reservoir layer (3) has a drug storage cavity (11) for storing drugs. A first elastic press-fit airbag strip (12) is horizontally fixed to the inner wall of the drug storage cavity (11). A second elastic press-fit airbag strip (13) is fixed to one side of the first elastic press-fit airbag strip (12) and to the inner wall of the drug storage cavity (11). The first elastic press-fit airbag strip (12) and the second elastic press-fit airbag strip (13) are... The pressable airbag strip (13) has a cross-shaped structure. The controlled-release membrane layer (4) has an outwardly convex support release layer (14) inside. The outwardly convex support release layer (14) has a convex structure on the side facing the drug reservoir layer (3). The first elastic pressable airbag strip (12) and the second elastic pressable airbag strip (13) connected together elastically abut against the convex end of the outwardly convex support release layer (14). The back of the controlled-release membrane layer (4) and the inner wall of the outwardly convex support release layer (14) are bonded with a drug release net (15) for drug release and discharge. The adhesive layer (5) has a drug release and discharge component inside for the drug to be uniformly transmitted through the adhesive layer (5) to the skin surface.
2. The external anesthetic pressure patch according to claim 1, characterized in that: The backing layer (2) has a contoured section (9) on both sides of its edge, so that the contoured section (9) fits the surface of human skin.
3. The external anesthetic pressure patch according to claim 2, characterized in that: The material of the backing layer (2) is selected as polyester fiber composite material.
4. The external anesthetic pressure patch according to claim 3, characterized in that: The surface of the backing layer (2) is provided with breathable micro-mesh (10) for ventilation and to prevent stuffiness during long-term wear.
5. The external anesthetic pressure patch according to claim 4, characterized in that: A reusable temporary protective film (7) is adhered to one side of the protective layer (6) facing away from the adhesive layer (5). The temporary protective film (7) has a transparent film structure and covers the outer wall of the easy-tear handle (8).
6. The external anesthetic pressure patch according to claim 5, characterized in that: An adhesive ring (16) is provided on the peripheral edge of one side of the adhesive layer (5) facing away from the controlled-release membrane layer (4), so that the adhesive ring (16) is tightly adhered to the skin.
7. The external anesthetic pressure patch according to claim 6, characterized in that: Anti-warping adhesive parts (17) are provided at the four inner corners of the adhesive ring (16), and the anti-warping adhesive parts (17) are integrally connected with the adhesive ring (16).
8. The topical anesthetic pressure patch according to claim 7, characterized in that: The adhesive layer (5) has multiple equally spaced staged partitions (18) inside, each staged partition (18) having a drug release micropore (19) for releasing the drug, the drug release micropore (19) being aligned with the outwardly convex support release layer (14) for drug discharge.