Subclavian deep vein fixing patch and use method thereof

Abstract

The invention discloses a subclavian deep vein fixing patch and a use method thereof, and belongs to the technical field of vein fixing patches, the subclavian deep vein fixing patch comprises a surface layer isolating membrane, a bottom layer moisturizing membrane and a middle fixing patch, the surface layer isolating membrane and the bottom layer moisturizing membrane respectively cover the upper layer and the lower layer of the middle fixing patch; a small amount of water is arranged at the connecting part of the bottom-layer moisturizing film and the middle fixing patch; and the middle fixing patch is isolated from an external bacteria environment by the surface-layer isolating film and the surface-layer isolating film. The invention provides a subclavian deep vein fixing patch and a using method thereof in order to solve the problems that due to the fact that release paper of an existing fixing patch needs to be completely torn away in advance, positioning is difficult, dressing is prone to displacement, and a catheter is prone to being pulled when the release paper is torn away, and safety risks are caused. The problems that an existing fixing patch is inaccurate in positioning, dressing is prone to being polluted, and a patient is injured due to the fact that a catheter is prone to being pulled when the fixing patch is torn off are effectively solved.

Description

Technical Field

[0001] This invention belongs to the technical field of intravenous dressing equipment, specifically referring to a subclavian deep vein fixation patch and its usage method. Background Technology

[0002] In clinical practice, after subclavian deep vein catheterization, specialized anti-infection dressings (sterile dressings) are often used to cover the puncture site and fix the catheter. Their main function is to prevent microbial invasion and maintain a sterile environment at the puncture site, rather than simply providing mechanical fixation. However, existing dressings of this type have significant drawbacks in use. The current "tear-then-apply" procedure essentially separates the "positioning" and "applying" actions, inevitably introducing secondary errors that affect fixation effectiveness and safety. When the fixation dressing needs to be replaced or removed, because the adhesive is tightly bonded to the catheter and skin, direct tearing applies a significant lateral or axial tensile force. This movement can, at best, irritate the vascular endothelium, causing pain and discomfort; at worst, it may move the subclavian needle, scratching the vessel wall and leading to complications such as hematoma and thrombosis. Therefore, the existing methods of applying and removing fixation dressings inherently suffer from the drawback of affecting the stability of the deep vein catheter due to the coordinated operation.

[0003] Furthermore, existing dressings are typically of a fixed size, with limited coverage area, and cannot be flexibly adjusted according to the skin condition around the puncture site. This leads to dressings becoming prematurely ineffective due to local moisture or contamination in the subclavian area, requiring frequent changes and increasing the workload of medical staff and the risk of infection for patients. Therefore, there is a need to design a sterile dressing system with a large coverage area that can effectively extend the dressing change cycle, while also possessing precise positioning and safe removal capabilities. Summary of the Invention

[0004] In response to the above issues, and to overcome the problems of existing fixation patches requiring complete removal of the release paper beforehand, which leads to positioning difficulties, easy displacement of the dressing, and safety risks caused by pulling on the catheter during removal, this invention provides a subclavian deep vein fixation patch and its usage method, which effectively solves the problems of inaccurate fixation patch positioning, easy contamination of the dressing, and easy damage to the catheter caused by pulling on it during removal.

[0005] The technical solution adopted by the present invention is as follows: The present invention provides a subclavian deep vein fixation patch, comprising a surface isolation film, a bottom moisturizing film, and a middle fixation patch. The surface isolation film and the bottom moisturizing film respectively cover the upper and lower layers of the middle fixation patch. There is a small amount of water at the connection between the bottom moisturizing film and the middle fixation patch. The surface isolation film and the bottom moisturizing film isolate the middle fixation patch from the external bacterial environment.

[0006] Furthermore, the central fixing patch includes an external connecting film, a limiting film, a liquid storage layer, an adhesive layer, and an anti-decomposition connecting piece. The external connecting film is adjacent to the surface isolation film, the limiting film is located below the external connecting film, the liquid storage layer is located below the limiting film, the adhesive layer is located on the bottom wall of the liquid storage layer, and the anti-decomposition connecting piece is located on the side wall of the limiting film, the liquid storage layer, and the adhesive layer. Each connection point between the anti-decomposition connecting piece and the limiting film, the liquid storage layer, and the adhesive layer is provided with an easy-tear line. Only after tearing the anti-decomposition connecting piece can the limiting film, the liquid storage layer, and the adhesive layer be torn apart into strip-like structures. The anti-decomposition connecting piece is mainly used to reduce the probability of the limiting film, the liquid storage layer, and the adhesive layer splitting before use.

[0007] Furthermore, the limiting membrane, the reservoir layer, and the adhesive layer are all provided with easy-tear lines, which can decompose the limiting membrane, the reservoir layer, and the adhesive layer into multiple strip-shaped films, avoiding the pain caused to the patient by dragging the needle and syringe at the same time when tearing open the intravenous patch.

[0008] Furthermore, the liquid storage layer includes a liquid storage bladder, a Tesla valve, and a docking hose. The liquid storage bladder is fixedly installed on the top wall of the adhesive layer, and a flow guide tube is provided on the side wall of the liquid storage bladder. The Tesla valve is fixedly installed on the inner wall of the flow guide tube, and the docking hose is fixedly installed on the flow guide tube.

[0009] Furthermore, the reservoir contains a liquid material for the viscous reaction. The viscous reaction material is medical-grade ethyl cyanoacrylate, which rapidly becomes viscous upon contact with air and water, fixing the adhesive layer to the skin surface. When injecting medical-grade ethyl cyanoacrylate into the reservoir, a Tesla valve restricts the flow direction of the ethyl cyanoacrylate. The reservoirs, arrayed within the reservoir layer, have Tesla valves in their sidewall guide tubes that adjust the direction of the inlet as needed, depending on their position.

[0010] Furthermore, the adhesive layer is provided with a disc-shaped cavity and a hose fixing bracket. The disc-shaped cavity is located below the liquid storage bladder, and the hose fixing bracket is fixedly installed on the adhesive layer. A small leakage hole is provided at the center of the disc-shaped cavity.

[0011] Furthermore, a leak-stopping membrane is provided on the bottom wall of the reservoir. The leak-stopping membrane has a conical structure, with its apex extending upwards and fixedly connected to the external connecting membrane by a thin rope. An annular easy-tear line is provided at the connection between the leak-stopping membrane and the bottom wall of the reservoir. A small hole is provided on the top wall of the reservoir for the thin rope to slide through. When the external connecting membrane is torn upwards, the thin rope pulls the leak-stopping membrane upwards, the easy-tear line breaks, and the liquid inside the reservoir flows out and enters the disc-shaped cavity. After contacting the water in the disc-shaped cavity, it becomes sticky and fixes the vein patch to the skin. A ring with a hard texture is provided on the top wall of the reservoir to facilitate the passage of the thin rope. The hard ring can cut the thin rope when it is pulled. The apex of the conical leak-stopping membrane will be stuck in the small hole on the top wall of the reservoir, preventing medical-grade ethyl cyanoacrylate from leaking from the top of the reservoir.

[0012] Furthermore, the side wall of the hose fixing bracket is provided with protrusions, and one hose fixing bracket is provided with two sets of protrusions. The two hose fixing brackets clamp and deform the docking hose to prevent the liquid in the reservoir from flowing. The top wall of the hose fixing bracket is provided with an arc-shaped support extending outward. The two sets of hose fixing brackets form a trumpet-shaped structure, which guides the docking hose and can also fix the docking hose. The connection between the protrusion and the hose fixing bracket is rounded.

[0013] Furthermore, the tear line between the reservoir and the sealing membrane is an airtight tear line, ensuring that the liquid inside the reservoir will not leak out from the tear line.

[0014] Furthermore, the connecting hose between the two adjacent sets of reservoirs is provided with an easy-tear line.

[0015] The present invention provides a method for using a subclavian deep vein fixation patch, comprising the following steps: Step 1: Peel off the outer protective film and the inner moisturizing film from the middle fixation patch. Place the middle fixation patch on the body surface and select and adjust the placement and orientation of the middle fixation patch according to the location of the supraclavicular puncture. Step 2: After the position is determined, tear off the external connecting membrane. Pull the thin string on the leak-stopping membrane with the external connecting membrane, and the easy-tear line between the leak-stopping membrane and the reservoir will break. The medical-grade ethyl cyanoacrylate in the reservoir will flow out and flow into the disc-shaped cavity. It will mix with water and become sticky. At this time, the position of the intravenous patch is fixed. Step 3: When removing the intravenous dressing, to avoid tearing the dressing and causing the infusion needle to slip, you can tear the anti-disintegration connecting piece along the easy-tear line from the limiting membrane, reservoir layer and adhesive layer. At this time, the opening of the easy-tear line on the limiting membrane, reservoir layer and adhesive layer will be exposed. Step 4: Decompose the three parts into strip-shaped films along the easy-tear lines of the limiting film, the reservoir layer, and the adhesive layer. First, remove the film at the distal needle end, and finally remove the film covering the needle tip. Remove the injection needle.

[0016] This solution provides a subclavian deep vein fixation patch and its application method, with the following beneficial effects: (1) As a sterile dressing for preventing infection, this application realizes the operation mode of "precise positioning first, then triggering adhesion". At the same time, its coverage area can be designed to be large in size, which can completely cover the puncture point and surrounding skin, forming a more reliable sterile barrier, reducing the dressing replacement due to local contamination or moisture, extending the dressing life, reducing the replacement frequency and related infection risks. (2) This application significantly reduces the risk of traction damage to catheters and blood vessels when removing the fixation patch: The fixation patch is designed with a structure of anti-disintegration connecting piece, limiting film, reservoir layer and adhesive layer that can be separated along the easy tear line. When it is necessary to replace or remove, first tear open the anti-disintegration connecting piece to expose the easy tear line opening of each layer. Then, the entire fixation patch can be divided into several independent strip films along these easy tear lines. This allows the operator to remove the film segment by segment from the distal end to the proximal end (needle tip), thereby greatly dispersing and reducing the instantaneous pulling force on the single-point catheter when removing the adhesive force, effectively preventing the indwelling needle from moving in the blood vessel due to tearing, ensuring patient safety, and reducing the risk of pain and complications. (3) This application ensures the reliability of the bonding process and the stability of the fixation effect through an integrated liquid storage and triggering structure: the networked liquid storage layer composed of the liquid storage bladder, Tesla valve and docking hose can uniformly and controllably distribute the reactive adhesive (such as medical grade ethyl cyanoacrylate) to each bonding area after triggering. The hose fixing frame and protrusion design ensure the sealing stability of the liquid during storage. The triggering mechanism (the thin rope pulls the leak-stopping membrane) is direct and reliable. Once activated, the adhesive reacts quickly to generate a strong and biocompatible adhesive force. The whole system achieves convenient and precise operation, and ultimately provides a long-lasting and stable fixation force far exceeding that of traditional pressure-sensitive tape. It is especially suitable for the subclavian area, which is prone to sweating and frequent movement, and improves the long-term stability of deep vein catheter placement. (4) This application focuses on the establishment and maintenance of sterile barrier. Through large-area coverage and reliable adhesion, it effectively isolates external microorganisms and is suitable for high infection risk scenarios such as subclavian deep vein catheterization, which meets the clinical use requirements of medical dressings. Attached Figure Description

[0017] Figure 1 An exploded view of a subclavian deep vein fixation patch provided by the present invention; Figure 2 An exploded view of the central fixed area; Figure 3 A bottom-view 3D diagram of the central fixed attachment; Figure 4 This is a top-view stereoscopic sectional view of the liquid reservoir. Figure 5This is a three-dimensional sectional view of the lower left side of the reservoir layer; Figure 6 This is a three-dimensional sectional view of the upper right side of the liquid storage layer; Figure 7 An exploded view of the liquid reservoir; Figure 8 A three-dimensional diagram of a subclavian deep vein fixation patch; Figure 9 This is a 3D view of the hose holder.

[0018] Among them, 1. Surface isolation membrane, 2. Bottom moisturizing membrane, 3. Middle fixing sticker, 4. External connecting membrane, 5. Limiting membrane, 6. Liquid storage layer, 7. Adhesive layer, 8. Anti-decomposition connecting piece, 9. Liquid storage bladder, 10. Tesla valve, 11. Connecting hose, 12. Guide tube, 13. Disc-shaped cavity, 14. Hose fixing bracket, 15. Leakage hole, 16. Leak-stopping membrane, 17. Protrusion, 18. Arc-shaped bracket.

[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] like Figures 1-9 As shown, the present invention provides a subclavian deep vein fixation patch, comprising a surface isolation film 1, a bottom moisturizing film 2, and a middle fixation patch 3. The surface isolation film 1 and the bottom moisturizing film 2 respectively cover the upper and lower layers of the middle fixation patch 3. There is a small amount of water at the connection between the bottom moisturizing film 2 and the middle fixation patch 3. The surface isolation film 1 and the surface isolation film 2 isolate the middle fixation patch 3 from the external bacterial environment.

[0023] The central fixing patch 3 includes an external connecting film 4, a limiting film 5, a liquid storage layer 6, an adhesive layer 7, and an anti-decomposition connecting piece 8. The external connecting film 4 is adjacent to the surface isolation film 1. The limiting film 5 is located below the external connecting film 4. The liquid storage layer 6 is located below the limiting film 5. The adhesive layer 7 is located on the bottom wall of the liquid storage layer 6. The anti-decomposition connecting piece 8 is located on the side walls of the limiting film 5, the liquid storage layer 6, and the adhesive layer 7. Each connection point between the anti-decomposition connecting piece 8 and the limiting film 5, the liquid storage layer 6, and the adhesive layer 7 is provided with an easy-tear line.

[0024] Easy-tear lines are provided on the limiting membrane 5, the liquid storage layer 6, and the adhesive layer 7.

[0025] The liquid storage layer 6 includes a liquid storage bladder 9, a Tesla valve 10, and a docking hose 11. The liquid storage bladder 9 is fixedly installed on the top wall of the adhesive layer 7. A guide tube 12 is provided on the side wall of the liquid storage bladder 9. The Tesla valve 10 is fixedly installed on the inner wall of the guide tube 12. The docking hose 11 is fixedly installed on the guide tube 12.

[0026] The reservoir 9 contains a material for the viscous reaction, which is medical-grade ethyl cyanoacrylate.

[0027] The adhesive layer 7 is provided with a disc-shaped cavity 13 and a hose fixing bracket 14. The disc-shaped cavity 13 is located below the liquid storage bladder 9, and the hose fixing bracket 14 is fixedly installed on the adhesive layer 7. A small leakage hole 15 is provided at the center of the disc-shaped cavity 13.

[0028] The bottom wall of the reservoir 9 is provided with a leak-stopping membrane 16, which is a conical structure. The apex of the leak-stopping membrane 16 extends upward and is fixedly connected to the external connecting membrane 4 by a thin rope. The connection between the leak-stopping membrane 16 and the bottom wall of the reservoir 9 is provided with an annular easy-tear line. The top wall of the reservoir 9 is provided with a small hole for the thin rope to slide through, and the top wall of the reservoir 9 is provided with a hard ring.

[0029] The side wall of the hose fixing bracket 14 is provided with protrusions 17, and two sets of protrusions 17 are provided on one hose fixing bracket 14. The two hose fixing brackets 14 clamp and deform the connecting hose 11. The top wall of the hose fixing bracket 14 is provided with an arc-shaped support 18 extending outward. The connection between the protrusions 17 and the hose fixing bracket 14 is rounded.

[0030] The tear line between the reservoir 9 and the leak-stopping membrane 16 is an airtight tear line.

[0031] The connecting hose 11 between two adjacent sets of liquid storage bladders 9 is equipped with an easy-tear line.

[0032] In the actual production of the intravenous patch, the bottom wall of the reservoir 9 is mechanically lifted upward to create a conical leak-proof membrane 16. The connection between the leak-proof membrane 16 and the reservoir 9 is heat-melted and thinned to create an easy-tear line. A Tesla valve 10 is installed inside the guide tube 12. The Tesla valve 10 is installed and fixed according to the placement position of the reservoir 9. For example, at the inlet end of the intravenous patch, there is only one reservoir 9 for injecting solvent from the outside, and the other three sets are used for discharging solvent; at the very end of the intravenous patch, the reservoir 9 is connected to only two sets of Tesla valves 10, and the two sets of Tesla valves 10 are used for injecting solvent. After injecting medical-grade ethyl cyanoacrylate into the reservoir 9, seal the inlet. Next, place the liquid storage layer 6, which is composed of array of liquid storage bladders 9, onto the top wall of the adhesive layer 7, and insert the docking hose 11 between the two sets of hose fixing brackets 14. The docking hose 11 is restricted by the protrusion 17 to prevent the liquid in the liquid storage bladder 9 from flowing. Next, the limiting membrane 5 is covered on the liquid storage layer 6, and then the external connecting membrane 4 is covered on the limiting membrane 5. The external connecting membrane 4 is then heat-fused to the thin rope on the plugging membrane 16 to achieve relative fixation between the plugging membrane 16 and the external connecting membrane 4. An easy-tear line is formed on the anti-disintegration connecting piece 8 by mechanical indentation; Finally, the surface isolation film 1 and the bottom moisturizing film 2 are respectively attached to the upper and lower walls of the middle fixed sticker 3 to complete the production. In actual use, peel off the outer isolation film 1 and the bottom moisturizing film 2, move the middle fixing patch 3 on the skin around the collarbone, and adjust the direction and angle of the middle fixing patch 3 according to the location of the puncture needle; To fix the vein patch, first tear off the outer connecting membrane 4. The outer connecting membrane 4 pulls the thin rope connected to the leak-stopping membrane 16, and the leak-stopping membrane 16 separates from the reservoir 9. The medical-grade ethyl cyanoacrylate in the reservoir 9 flows out and enters the disc-shaped cavity 13. It becomes viscous when it comes into contact with water, thus fixing the middle fixation patch 3 to the body surface. Peel off the middle fixing sticker 3, first tear the anti-disintegration connecting piece 8 along the easy tear line, the anti-disintegration connecting piece 8 separates from the limiting film 5, the liquid storage layer 6, and the adhesive layer 7, the opening of the easy tear line on the limiting film 5, the liquid storage layer 6, and the adhesive layer 7 is exposed, tear the liquid storage layer 6 and the adhesive layer 7 into strips along the easy tear line on the limiting film 5. First remove the membrane from the distal needle tip, then remove the membrane covering the needle tip, and finally remove the injection needle. This application is a type of infection-preventing dressing (sterile dressing). Its coverage area can be designed to be larger in size according to clinical needs, so as to extend the dressing replacement cycle and reduce the risk of infection caused by frequent replacement, which is in line with the functional positioning of medical dressings.

[0033] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A subclavian deep vein fixation patch, characterized in that: It includes a surface isolation film (1), a bottom moisturizing film (2), and a middle fixing patch (3). The surface isolation film (1) and the bottom moisturizing film (2) cover the upper and lower layers of the middle fixing patch (3), respectively. There is water at the connection between the bottom moisturizing film (2) and the middle fixing patch (3). The surface isolation film (1) and the bottom moisturizing film (2) isolate the middle fixing patch (3) from the external bacterial environment.

2. The subclavian deep vein fixation patch according to claim 1, characterized in that: The middle fixing sticker (3) includes an external connecting film (4), a limiting film (5), a liquid storage layer (6), an adhesive layer (7), and an anti-decomposition connecting piece (8). The external connecting film (4) is adjacent to the surface isolation film (1). The limiting film (5) is located below the external connecting film (4). The liquid storage layer (6) is located below the limiting film (5). The adhesive layer (7) is located on the bottom wall of the liquid storage layer (6). The anti-decomposition connecting piece (8) is located on the side wall of the limiting film (5), the liquid storage layer (6), and the adhesive layer (7). The anti-decomposition connecting piece (8) is provided with an easy-tear line at the connection points with the limiting film (5), the liquid storage layer (6), and the adhesive layer (7).

3. The subclavian deep vein fixation patch according to claim 2, characterized in that: The limiting membrane (5), the liquid storage layer (6), and the adhesive layer (7) are all provided with easy-tear lines.

4. The subclavian deep vein fixation patch according to claim 3, characterized in that: The liquid storage layer (6) includes a liquid storage bladder (9), a Tesla valve (10), and a docking hose (11). The liquid storage bladder (9) is fixedly installed on the top wall of the adhesive layer (7). A flow guide tube (12) is provided on the side wall of the liquid storage bladder (9). The Tesla valve (10) is fixedly installed on the inner wall of the flow guide tube (12). The docking hose (11) is fixedly installed on the flow guide tube (12).

5. The subclavian deep vein fixation patch according to claim 4, characterized in that: The reservoir (9) contains a liquid material for viscous reactions.

6. The subclavian deep vein fixation patch according to claim 5, characterized in that: The adhesive layer (7) is provided with a disc-shaped cavity (13) and a hose fixing bracket (14). The disc-shaped cavity (13) is located below the liquid storage bladder (9). The hose fixing bracket (14) is fixedly installed on the adhesive layer (7). A small leakage hole (15) is provided at the center of the disc-shaped cavity (13).

7. A subclavian deep vein fixation patch according to claim 6, characterized in that: The bottom wall of the reservoir (9) is provided with a leak-stopping membrane (16), which is a conical structure. The apex of the leak-stopping membrane (16) extends upward and is fixedly connected to the external connecting membrane (4) by a thin rope. The connection between the leak-stopping membrane (16) and the bottom wall of the reservoir (9) is provided with an annular easy-tear line. The top wall of the reservoir (9) is provided with a small hole for the thin rope to slide through. The top wall of the reservoir (9) is provided with a hard ring.

8. The subclavian deep vein fixation patch according to claim 7, characterized in that: The side wall of the hose fixing bracket (14) is provided with protrusions (17), and two sets of protrusions (17) are provided on one hose fixing bracket (14). The two hose fixing brackets (14) clamp and deform the connecting hose (11). The top wall of the hose fixing bracket (14) is provided with an arc-shaped support (18) extending outward. The connection between the protrusion (17) and the hose fixing bracket (14) is rounded.

9. A subclavian deep vein fixation patch according to claim 8, characterized in that: The tear line between the reservoir (9) and the sealing membrane (16) is an airtight tear line; the connecting hose (11) between the two adjacent reservoirs (9) is provided with a tear line.

10. The method of using the subclavian deep vein fixation patch according to claim 9, characterized in that, Includes the following steps: Step 1: Peel off the surface isolation film (1) and the bottom moisturizing film (2) from the middle fixation patch (3). Cover the body surface with the middle fixation patch (3). Select and adjust the placement and orientation of the middle fixation patch (3) according to the location of the supraclavicular puncture. Step 2: After the position is determined, tear off the external connecting membrane (4). Pull the thin rope on the leak-stopping membrane (16) with the external connecting membrane (4). The easy-tear line between the leak-stopping membrane (16) and the reservoir (9) breaks. The medical grade ethyl cyanoacrylate in the reservoir (9) flows out and flows into the disc cavity (13). It mixes with water and becomes sticky. At this time, the position of the intravenous patch is fixed. Step 3: When removing the intravenous patch, in order to avoid tearing the intravenous patch and causing the infusion needle to slide, the anti-disintegration connecting piece (8) can be torn along the easy-tear line from the limiting film (5), the reservoir layer (6) and the adhesive layer (7). At this time, the opening of the easy-tear line on the limiting film (5), the reservoir layer (6) and the adhesive layer (7) will be exposed. Step 4: Decompose the three into strip-shaped films along the tear lines of the limiting film (5), the liquid storage layer (6), and the adhesive layer (7). First, remove the film at the distal needle end, and finally remove the film covering the needle tip. Remove the injection needle.

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