Shape memory closure device for promoting closure of open wound

Abstract

The utility model discloses a shape memory closure device for promoting closure of an open wound, which relates to the technical field of medical instruments and comprises a protective film, an activation component, a shape memory polymer layer and an elastic adhesive film which are sequentially arranged from outside to inside. And the activation assembly is used for activating the shape memory polymer layer, so that the shape memory polymer layer shrinks after being activated. According to the utility model, the activation component is arranged between the protective film and the shape memory polymer layer, so that the shape memory polymer layer can be stimulated by the activation component to generate restoring force to promote wound healing, and skins on two sides of a wound can be just touched to heal without needing to manually promote healing like a zipper type adhesive bandage; the problem that a zipper type adhesive bandage is stretched too much, so that a user feels uncomfortable due to tightening or hyperplasia occurs due to insufficient stretching is effectively solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, in particular to a shape memory closing device that promotes the closing of an open wound. Background Art

[0002] The wound closure devices currently used include ordinary Band-Aids, zipper-type Band-Aids, and shape memory closure devices based on shape memory function.

[0003] The above-mentioned wound closure device has the following problems:

[0004] 1. Ordinary Band-Aids are mostly used to treat minor abrasions and cuts. They focus on protecting and fixing the wound, but have little effect on promoting wound closure and healing. In addition, ordinary Band-Aids easily adhere to wounds, and due to the product characteristics of ordinary Band-Aids, most products need to be replaced multiple times, which can easily cause secondary rupture of the wound.

[0005] 2. Zipper-type Band-Aids often require manual intervention to promote wound healing, and are prone to excessive stretching that may cause the user to feel tight and uncomfortable, or insufficient stretching that may cause proliferation problems.

[0006] 3. Although the existing shape memory closure device can shrink and promote wound closure under the drive of alcohol, there is no special band-aid for infants on the market. The skin of infants is delicate, and the comfort and irritation of band-aids are very high. The common alcohol concentration sold on the market is 75%, and too high a concentration can easily cause greater irritation to infants' skin; infants have weak resistance and are easily invaded by viruses, causing colds and fevers.

[0007] 4. In addition, the existing shape memory closure device requires the additional help of external alcohol to stimulate the shape memory material to generate a restoring force.

[0008] Therefore, in order to solve the above problems, the utility model provides a shape memory closure device for closure of an open wound. Utility Model Content

[0009] In view of the above problems, the purpose of the utility model is to provide a shape memory closure device for promoting the closure of open wounds, which solves the problem that the existing shape memory closure devices need to additionally spray alcohol to stimulate the shape memory material to generate a restoring force to promote the closure of the wound.

[0010] The technical solution adopted by the utility model is as follows: a shape memory closure device for promoting the closure of an open wound, comprising a protective film, an activation component, a shape memory polymer layer and an elastic adhesive film arranged in sequence from the outside to the inside; the activation component is used to activate the shape memory polymer layer, causing the shape memory polymer layer to shrink after activation.

[0011] Furthermore, a cavity is formed between the shape memory polymer layer 6 and the protective film 1, and the activation component is placed in the cavity.

[0012] Furthermore, the cavity bulges outward based on the shape memory polymer layer.

[0013] Furthermore, the activation component is liquid alcohol wrapped by an organic film.

[0014] Furthermore, the activation component is a hydrogel containing alcohol components.

[0015] Furthermore, an isolation membrane is provided between the hydrogel and the shape memory polymer layer.

[0016] Furthermore, the material of the protective film is silicone.

[0017] Furthermore, the material of the shape memory polymer layer is polyurethane

[0018] Furthermore, the elastic adhesive film is made of medical silicone gel.

[0019] Furthermore, the elastic modulus of the material of the device is 0.88MPa-0.92MPa.

[0020] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0021] 1. The utility model sets an activation component between the protective film and the shape memory polymer layer, so that the utility model can use the activation component to stimulate the shape memory polymer layer to generate restoring force to promote wound healing, so that the skin on both sides of the wound can just touch and heal, without the need for manual promotion of healing like a zipper-type band-aid, and effectively avoids the tightness and discomfort caused by excessive stretching of the zipper-type band-aid or the hyperplasia problem caused by insufficient stretching.

[0022] 2. Liquid alcohol is wrapped by an organic film, and liquid alcohol is stored in a hydrogel to prepare an alcohol hydrogel. The activation component is prepared by these two methods, and its production cost is low. Those skilled in the art can easily obtain the materials, which further improves the practicality of the utility model. At the same time, the utility model does not need to be sprayed with external alcohol, which greatly reduces the burden of use for the user, so that when the user is an infant, it will not irritate the delicate skin of the infant, reflecting the simplicity and comfort of the utility model.

[0023] 3. A cavity for accommodating the activation component is provided between the shape memory polymer layer and the protective film, and the cavity bulges outward based on the shape memory polymer layer, so that the user can lightly press the bulged part to release the alcohol in the organic film, thereby saving time and effort, and the patient will not feel slight pain due to excessive pressing force, thereby ensuring the practicality and comfort of the utility model.

[0024] 4. The elastic adhesive film of the part of the utility model that contacts the skin is made of medical silicone gel. The low-allergenic medical-grade production standard can better ensure safety, avoid the problem of traditional bandages being sensitive and irritating the skin, and have low pain when peeling, avoiding the problem of traditional bandages causing secondary damage to the wound. At the same time, the protective film is made of silicone, which has good air permeability and waterproofness, making the utility model breathable and skin-friendly, and can also prevent water from entering the wound and affecting the normal healing of the subsequent wound.

[0025] 5. The elastic modulus of the material of the utility model is 0.88MPa-0.92MPa, that is, around 0.9MPa, which is compatible with the elastic modulus of human skin. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of the ellipsoidal alcohol structure provided by an embodiment of the utility model;

[0028] Figure 2 A schematic diagram of the structure of an alcohol ball provided in an embodiment of the utility model;

[0029] Figure 3 A schematic diagram of the spherical alcohol structure provided by an embodiment of the utility model;

[0030] Figure 4 This is a schematic diagram of the hydrogel structure provided in an embodiment of the utility model.

[0031] Description of the drawings: 1. Protective film; 2. Ellipsoidal alcohol; 3. Alcohol spheres; 4. Spherical alcohol; 5. Hydrogel; 6. Shape memory polymer layer; 7. Elastic adhesive film; 8. Isolation film. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] Combine the following Figure 1-Figure 4 The utility model is described in detail.

[0036] Example

[0037] Embodiment 1

[0038] Depend on Figure 1 It can be seen that a shape memory closure device for promoting the closure of an open wound comprises a protective film 1, an activation component, a shape memory polymer layer 6 and an elastic adhesive film 7 which are arranged in sequence from the outside to the inside; the activation component is used to activate the shape memory polymer layer 6, causing the shape memory polymer layer 6 to contract after activation, and from the outside to the inside here means that the side close to the patient's skin is the inside, and the side away from the patient's skin is the outside.

[0039] The shape memory polymer layer 6 is a nanofiber material formed by electrostatic spinning of an elastic polyurethane material, and is stretched and thermally cured during the production process, that is, the shape memory polymer layer 6 is in a stretched pre-deformed state. The utility model utilizes the shape memory function of the shape memory polymer layer 6, and subsequently generates an inward restoring force under the stimulation of alcohol to promote the closure of the patient's wound. However, the utility model does not require additional spraying of alcohol from the outside, and an activation component is provided between the protective film 1 and the shape memory polymer layer 6. The activation component is liquid alcohol wrapped by an organic film, that is, the upper layer of the shape memory polymer layer 6 contains liquid alcohol wrapped by an organic film, and is stored by the protective film 1. When in use, it is only necessary to press the device to release the liquid alcohol in the organic film, and the liquid alcohol penetrates from the surface of the shape memory polymer layer 6 into the filaments, thereby triggering the alcohol-induced shape recovery of the shape memory polymer layer 6, and driving the contraction of the entire device, and finally driving the contraction and closure of the patient's wound.

[0040] The material of the shape memory polymer layer 6 is polyurethane, but it is not limited to polyurethane. Other polymers with shape memory function can also be used. The material of the organic film used to wrap the liquid alcohol is sodium alginate. The concentration of the liquid alcohol is not specifically limited here, and it can meet the actual use requirements.

[0041] In addition, the material of the protective film 1 is silicone. The protective film 1 is made of silicone with low viscosity, which plays a role in protecting the wound and preventing external bacteria from infecting the wound. At the same time, silicone has good air permeability and waterproofness, making the utility model breathable and skin-friendly, and can also prevent water from entering the wound and affecting the subsequent normal healing of the wound.

[0042] Furthermore, the elastic adhesive film 7 is made of medical silicone gel, which makes the device tightly bonded to the patient's skin, and stores elastic potential energy to assist the shape memory polymer layer 6 in the contraction process. The low allergenicity of medical silicone gel allows the utility model to avoid the problem of traditional bandages being sensitive and irritating to infants' skin, and the medical-grade production standards can better ensure safety. In addition, the device is less painful when peeled off, avoiding the problem of secondary damage to the wound caused by tearing traditional bandages.

[0043] Furthermore, a cavity for accommodating the activation component is provided between the shape memory polymer layer 6 and the protective film 1, and the cavity bulges outward based on the shape memory polymer layer 6. The user can release the alcohol in the organic film by gently pressing the bulged part, which saves time and effort, and does not cause slight pain to the patient due to excessive pressing force, thus ensuring the practicality and comfort of the utility model. However, the bulging degree should not be too large to avoid affecting the subsequent application of the utility model on the patient's skin.

[0044] Figure 1In the embodiment, the shape of the cavity makes the liquid alcohol wrapped by the organic film, i.e., the activation component, be an ellipsoidal alcohol 2, which is distributed between the protective film 1 and the shape memory polymer layer 6 in the form of a thin film.

[0045] In addition, the elastic modulus of the material of the utility model is 0.88MPa-0.92MPa, that is, around 0.9MPa, which is adapted to the elastic modulus of human skin.

[0046] It is worth pointing out that the activation component can not only be liquid alcohol wrapped in an organic film, but also other chemical solutions that drive the shape memory effect wrapped in an organic film, such as hydrogen peroxide solution, iodine, mercurochrome, gentian violet, phosphate buffer, physiological saline, etc.

[0047] In addition, the device can be used not only for humans but also for closing open wounds of animals.

[0048] Embodiment 2

[0049] Depend on Figure 2 It can be seen that, based on the above-mentioned embodiment 1, the activation component, namely the liquid alcohol wrapped by the organic film, is an alcohol ball 3 with a diameter of 2 mm, which is evenly distributed between the protective film 1 and the shape memory polymer layer 6.

[0050] In addition, the elastic modulus of the material of the utility model is 0.88MPa-0.92MPa, that is, around 0.9MPa, which is adapted to the elastic modulus of human skin.

[0051] Embodiment 3

[0052] Depend on Figure 3 It can be seen that, based on the above-mentioned embodiment 1, the shape of the cavity makes the liquid alcohol wrapped by the organic film, i.e., the activation component, be spherical alcohol 4, which is located at the exact center of the protective film 1 and the shape memory polymer layer 6.

[0053] In addition, the elastic modulus of the material of the present invention is about 0.9 MPa, which is compatible with the elastic modulus of human skin.

[0054] Embodiment 4

[0055] Depend on Figure 4 It can be seen that, based on the above-mentioned embodiment 1, the activation component is a hydrogel 5 having an alcohol component, that is, liquid alcohol is stored in the hydrogel 5, thereby forming an alcohol hydrogel. A layer of isolation film 8 is prepared between the hydrogel 5 and the shape memory polymer layer 6 to prevent the alcohol in the hydrogel 5 from contacting the shape memory polymer layer 6 in advance, thereby rendering the device ineffective.

[0056] It is also worth pointing out that the activation component can not only be a hydrogel 5 with an alcohol component, but also a hydrogel 5 with other chemical components that drive the shape memory effect, such as hydrogen peroxide solution, iodine, mercurochrome, gentian violet, phosphate buffer, physiological saline, etc.

[0057] During use, the isolation membrane 8 is broken by external stretching, and the alcohol in the hydrogel 5 contacts the shape memory polymer layer 6. The alcohol penetrates into the filaments from the surface of the shape memory polymer layer 6, thereby triggering the alcohol-induced shape recovery of the shape memory polymer layer 6, and driving the contraction of the entire device, ultimately driving the contraction and closure of the patient's wound.

[0058] In addition, the elastic modulus of the material of the utility model is 0.88MPa-0.92MPa, that is, around 0.9MPa, which is adapted to the elastic modulus of human skin.

[0059] The specific use process of the above embodiments is as follows: when an open wound appears on the body, the utility model is taken out. Embodiments 1, 2 and 3 press the bulging part of the upper protective film 1 to rupture the activation component, that is, the organic film ruptures and the liquid alcohol is released. Embodiment 4 stretches the isolation film 8 horizontally to release the alcohol in the hydrogel 5. Then, the device is applied to the wound and the device is waited for to be contracted. The use of the device is completed. After the wound is healed or needs to be replaced, only a little alcohol needs to be applied around the product to easily remove it.

[0060] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A shape memory closure device for facilitating the closure of an open wound, characterized in that: It comprises a protective film (1), an activation component, a shape memory polymer layer (6) and an elastic adhesive film (7) which are arranged in sequence from the outside to the inside; the activation component is used to activate the shape memory polymer layer (6) to cause the shape memory polymer layer (6) to contract after activation.

2. The shape memory closure device for facilitating closure of an open wound according to claim 1, characterized in that: A cavity is formed between the shape memory polymer layer (6) and the protective film (1), and the activation component is placed in the cavity.

3. The shape memory closure device for facilitating closure of an open wound according to claim 2, characterized in that: The cavity bulges outwards based on the shape memory polymer layer (6).

4. The shape memory closure device for facilitating closure of an open wound according to claim 2, characterized in that: The activation component is liquid alcohol wrapped by an organic film.

5. The shape memory closure device for facilitating closure of an open wound according to claim 1, characterized in that: The activation component is a hydrogel (5) having an alcohol component.

6. The shape memory closure device for facilitating closure of an open wound according to claim 5, characterized in that: An isolation membrane (8) is provided between the hydrogel (5) and the shape memory polymer layer.

7. The shape memory closure device for facilitating the closure of an open wound according to any one of claims 2 to 6, characterized in that: The material of the protective film (1) is silica gel.

8. The shape memory closure device for facilitating the closure of an open wound according to any one of claims 2 to 6, characterized in that: The shape memory polymer layer (6) is made of polyurethane.

9. The shape memory closure device for facilitating the closure of an open wound according to any one of claims 2 to 6, characterized in that: The elastic adhesive film (7) is made of medical silicone gel.

10. The shape memory closure device for facilitating the closure of an open wound according to any one of claims 2 to 6, characterized in that: The material elastic modulus of the shape memory closure device is 0.88MPa-0.92MPa.

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