Infusion exosmosis protection fixing paste

Abstract

The invention discloses an infusion exosmosis protection fixing patch, and relates to the technical field of medical nursing materials, in particular to an infusion exosmosis protection fixing patch which comprises an outer-layer backing film, an absorption core body is arranged at the upper end of the outer-layer backing film, and an easy-to-tear strip is arranged at the lower end of the outer-layer backing film; the absorption core body comprises a flow guide layer, an absorption layer and an anti-leakage bottom film which are sequentially arranged from top to bottom. A transparent observation window can be arranged above the absorption core body, and reinforcing edges are arranged outside the absorption core body and the transparent observation window. Wherein the flow guide layer is made of hydrophilic non-woven fabric, the absorption layer is filled with high-molecular water-absorbent resin particles, and the anti-leakage bottom film is a polyethylene film. In addition, four corners of the outer-layer backing film are rounded, and breathable micropores are formed in the left side and the right side of the outer-layer backing film. By arranging the multi-layer absorption structure and the anti-leakage bottom film, liquid medicine can be effectively absorbed and prevented from leaking outwards, meanwhile, the condition of a puncture part is conveniently monitored in real time through the transparent observation window, and the disposable puncture needle has the advantages of being convenient to use and good in protection effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical care supplies, in particular to a transfusion exosmosis protection fixing patch. BACKGROUND

[0002] As a basic and widely used drug delivery method in clinical treatment, the operation process of intravenous infusion therapy is relatively mature. However, in actual clinical nursing, due to the poor blood vessel condition of patients, the special nature of drugs, the long infusion time, or the difference in operation technology of nursing personnel, and other factors, the event of infusion exosmosis often occurs. Infusion exosmosis refers to the leakage or exosmosis of intravenous infusion liquid or drugs into the interstitial space of the surrounding tissue outside the normal blood vessel passage due to various reasons. Once exosmosis occurs, it will cause local tissue swelling and pain, affecting the comfort and treatment experience of patients. For some drugs with strong irritation, blistering or high osmotic pressure (such as some chemotherapy drugs, high-concentration potassium salt, calcium agent, and vasoactive drugs), exosmosis will cause local tissue inflammation, necrosis, and even limb dysfunction, which not only increases the pain of patients, prolongs the hospitalization time, but also may cause medical disputes, posing a severe challenge to nursing quality.

[0003] In order to solve this clinical problem, the following protective measures are mainly adopted in the market and in clinical practice: first, to strengthen the patrol and discover the exosmosis signs as soon as possible by increasing the patrol frequency of nursing personnel; second, to use traditional transparent dressings or adhesive tapes for fixation in order to reduce the irritation caused by the movement of the catheter; third, for the case of exosmosis, passive treatment methods such as local drug sealing, cold compress, hot compress, or surgical debridement are adopted. However, these methods have obvious limitations. First, manual patrol is limited by human resources and work intensity, and it is difficult to achieve 24-hour uninterrupted monitoring, which has the risk of discovery lag. Second, traditional transparent dressings or adhesive tapes can only play a physical fixation role, and lack any active absorption, water locking, and isolation ability for the exosmosis of drugs, which cannot prevent the further deterioration of exosmosis. When a small amount of drug exosmosis occurs, these traditional materials are often quickly soaked, resulting in fixation failure, and may directly package the chemical irritant drug between the skin and the dressing, causing "secondary damage" and aggravating tissue damage.

[0004] Therefore, how to design a new infusion auxiliary product capable of integrating the functions of fixation, prevention, monitoring and active absorption has become a technical problem to be solved in the current clinical nursing field. An ideal product not only needs to be convenient for medical staff to observe the puncture point in appearance, but also needs to have efficient liquid guiding, rapid absorption and reliable anti-leakage performance in structure, so as to play a role in the initial stage or the extremely small amount of exudation stage of exosmosis, absorb and lock the liquid in time, avoid direct contact with the skin, and fundamentally reduce the degree of exosmosis damage. At the same time, the product also needs to consider the comfort and air permeability of wearing, and reduce complications such as skin immersion and allergy caused by long-term coverage. SUMMARY

[0005] The purpose of the present application is to provide an infusion exosmosis protection fixing patch, which can effectively absorb and block liquid exosmosis by setting a multi-layer absorption structure and an anti-leakage bottom film, and can monitor the puncture site in real time by using a transparent observation window, and has the advantages of convenient use and good protection effect.

[0006] To achieve the above purpose, the present application is implemented by the following technical scheme: an infusion exosmosis protection fixing patch, the main structure of the infusion exosmosis protection fixing patch is composed of an outer backing film with good support, and a core functional component absorption core is integrated on the upper end of the outer backing film. The absorption core, as a key area for processing liquid penetration, is composed of three layers with different functions. The top flow guide layer is responsible for quickly guiding the flow of liquid, the middle absorption layer is used for locking water, and the bottom anti-leakage bottom film plays the final isolation role. This layered design makes the product have clear functional division when processing liquid in different stages, and can effectively deal with various liquid exosmosis that may occur during infusion, and ensure the protection effect on the affected area.

[0007] Further, in order to improve the use convenience and structural stability of the product, a transparent observation window is specially provided above the absorption core. The window allows medical staff or patients to directly visually inspect the absorption condition of the internal liquid and the actual condition of the skin without tearing the patch. At the same time, in order to prevent the absorption core from deforming or shifting due to external force during use, a reinforced edge is designed on the outer contour of the absorption core and the transparent observation window to enhance the mechanical strength of the whole. In addition, in order to facilitate taking out or adjusting the position from the packaging, a special easy-tear strip structure is reserved at the lower end of the outer backing film. These detailed designs greatly optimize the practical performance of the product.

[0008] Furthermore, the flow-guiding layer, as the primary contact interface of the absorbent core, is carefully positioned at the very top. Its main function is to quickly receive and disperse the dripping liquid, preventing local accumulation and uneven wetting. To achieve this function, the flow-guiding layer is made of a specially treated hydrophilic non-woven fabric. This material has excellent capillary effect and diffusion ability, which can quickly guide the liquid laterally to a larger area, thereby effectively reducing the local pressure of the liquid and providing valuable reaction time for the subsequent absorbent layer, ensuring that the liquid can be uniformly and quickly introduced into the absorbent structure below.

[0009] Furthermore, the absorbent layer is the core liquid storage component of the entire protective patch. It is located below the diversion layer to receive the liquid that is diverted. In order to achieve efficient liquid absorption capacity and water-locking effect, the interior of the absorbent layer is not ordinary fluff pulp, but is filled with a large number of superabsorbent polymer particles. This particle material has extremely strong water absorption and expansion capacity and water retention properties, which can instantly transform the liquid delivered by the diversion layer into a gel-like substance and lock it firmly. Even under certain pressure, it will not easily seep back to the skin surface, thus creating a dry and comfortable healing environment for the affected area.

[0010] Furthermore, to prevent the liquid trapped within the absorbent layer from leaking downwards and staining clothing or sheets, this product has a leak-proof bottom film attached to the very bottom of the absorbent layer. This bottom film is made of dense, airtight polyethylene film, which has extremely high liquid barrier properties, forming a strong physical barrier that ensures that no matter how saturated the absorbent layer is, liquid cannot penetrate it. At the same time, this material has good chemical stability and is not prone to reacting with other substances, ensuring the safety and reliability of the product during use.

[0011] Furthermore, the transparent observation window is designed to provide clear visual feedback. Therefore, its size and shape are precisely designed to completely cover and match the absorption core area below, ensuring a seamless view. In terms of material selection, the observation window abandons ordinary plastic and instead uses medical-grade transparent polyurethane material. This material is not only highly transparent but also has good flexibility and biocompatibility. It will not cause creases that affect observation due to folding, nor will it cause allergies or irritation due to prolonged contact with the skin, ensuring the long-lasting effectiveness of the observation function.

[0012] Furthermore, the reinforced edge design is crucial for maintaining the overall shape of the product. It presents a continuous ring-shaped encircling structure that tightly surrounds and wraps around the outer edges of the absorbent core and the transparent viewing window. This design is equivalent to adding a sturdy frame to the fragile central area, which can effectively resist friction, pulling, and accidental collisions from the external environment, preventing the filling material inside the absorbent core from shifting or the transparent viewing window from breaking. This ensures the structural integrity of the product after it is pasted on and extends the product's service life.

[0013] Furthermore, considering ergonomics and safety, the main outline of the outer backing film is designed as a standard rectangular structure to facilitate production and standardized packaging. Of particular note is that, in order to prevent sharp edges from accidentally scratching the patient's delicate skin during daily activities or removal, all four corners of the rectangular backing film have been rounded, making its edges smooth and rounded, greatly reducing safety hazards during use and improving the patient's wearing comfort.

[0014] Furthermore, to ensure the strong connection between the absorbent core and the outer backing film and to avoid liquid leakage due to separation, this product is processed using an advanced hot-pressing composite process. Through this process, the two layers of materials achieve a tight bond at the molecular level under high temperature and pressure, and the resulting composite structure is virtually invisible to the naked eye, with no obvious gaps or interface marks. This seamless connection not only enhances the product's sealing performance but also makes the surface of the entire patch smoother and more flat, which is conducive to close contact with the skin.

[0015] Furthermore, to address the issue of poor breathability in traditional dressings leading to stuffy and uncomfortable skin, this solution features numerous tiny ventilation holes evenly distributed along the left and right edges of the outer backing film. The diameter of these micropores is strictly controlled within a scientific range of 0.5 mm to 1 mm, ensuring the smooth passage of water vapor and oxygen to maintain normal skin respiration and metabolism, while effectively blocking the intrusion of external dust particles and large-molecule bacteria. This micropore array design cleverly balances the contradiction between waterproof sealing and breathable comfort, greatly improving the user's wearing experience.

[0016] This invention provides an infusion extravasation prevention and fixation patch, which has the following beneficial effects: 1. Multi-layered gradient absorption and leak-proof design effectively solves the problem of leakage retention. This product utilizes a three-layer structure—a flow-guiding layer, an absorbent layer, and a leak-proof bottom membrane—to create a highly efficient fluid management channel. The top hydrophilic non-woven flow-guiding layer quickly disperses any extravasated fluid, preventing localized accumulation. The middle absorbent layer, filled with superabsorbent polymer (SAP), transforms the fluid into a gel, significantly increasing absorbency and preventing backflow. The bottom polyethylene leak-proof bottom membrane acts as the final physical barrier, completely preventing fluid from penetrating the patient's skin or clothing. This gradient function, from "rapid guidance" to "powerful water retention" and then to "absolute barrier," significantly reduces the risk of skin redness, ulceration, and infection caused by extravasation, making it particularly suitable for the care of patients receiving hypertonic medications or long-term infusions.

[0017] The transparent viewing window and reinforced edge design balance clinical monitoring with structural stability. A medical-grade transparent polyurethane observation window is placed above the absorbent core, allowing medical staff to directly observe changes in skin color and the absorption of exudate around the puncture site without tearing the dressing. This facilitates the timely detection of potential inflammation or allergic reactions, improving nursing efficiency and safety. Simultaneously, the annular reinforced edge surrounding the absorbent core and observation window, thickened with additional adhesive or material, significantly enhances the dressing's shear resistance and peel strength. This design effectively solves the problem of traditional dressings easily curling and falling off during use, ensuring the dressing's airtightness and adhesion throughout the entire treatment cycle.

[0018] Human-centered detail optimization significantly improves patient comfort and user experience. The product demonstrates a humanistic concern for patients in many details. The outer backing film has rounded corners on all four sides, effectively avoiding the risk of sharp edges scratching the skin during daily activities. The breathable micropores (0.5-1mm in diameter) on both sides of the backing film ensure waterproofing and antibacterial properties while allowing for a small amount of moisture exchange, reducing the stuffy, hot, and humid feeling caused by prolonged wear and lowering the incidence of maceration dermatitis. Furthermore, the easy-tear strip at the bottom allows for easy removal of the dressing during changes, reducing pain caused by forceful tearing, making it particularly suitable for infants or elderly patients with delicate skin.

[0019] High-strength composite technology and skin-friendly material selection ensure long-lasting adhesion and biocompatibility. The absorbent core and outer backing film are bonded together using a hot-pressing process, eliminating gaps between them. This not only improves the overall sealing and waterproof performance but also ensures the integrity of the dressing structure. The selected hydrophilic non-woven fabric drainage layer and medical-grade polyurethane observation window both possess excellent biocompatibility and low allergenicity, are soft in texture, and adhere closely to the skin without causing irritation. This high-quality material combination, coupled with precise manufacturing processes, ensures that the protective patch maintains a secure fixation even during limb movement, preventing catheter traction pain or puncture site exposure caused by dressing displacement.

[0020] Integrated functions simplify nursing procedures and reduce healthcare costs. This protective dressing integrates four functions: extravasation absorption, leakage prevention, catheter fixation, and skin observation, replacing the cumbersome steps of using absorbent pads, transparent dressings, and tape separately in traditional methods. This integrated design not only simplifies the nurses' procedures and shortens dressing change time, but also effectively prevents serious complications (such as tissue necrosis) caused by untimely extravasation treatment through its excellent absorption and leak-proof properties. In the long run, this reduces the cost of secondary treatment and length of hospital stay due to inadequate nursing care, resulting in significant economic and social benefits. Attached Figure Description

[0021] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure One ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure Two ; Figure 3 This is a cross-sectional structural diagram of the overall structure of the present invention; Figure 4 This is a schematic diagram of the structure of the absorber core of the present invention.

[0023] Part Name: 1. Outer backing membrane; 2. Absorbent core; 21. Diversion layer; 22. Absorbent layer; 23. Leak-proof bottom membrane; 3. Transparent observation window; 4. Reinforced edges; 5. Easy-tear strip. Detailed Implementation

[0024] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses consistent with some aspects of this disclosure as detailed in the appended claims.

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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.

[0026] How to use: Step 1: Preparation before use Operators must wear sterile gloves and inspect their hands and the extravasation protection adhesive tape to be used.

[0027] Confirm that the outer backing film 1 has a rectangular structure and that all four corners are rounded to avoid scratching the patient's skin during use. Check whether there are several equally spaced breathable micropores on the left and right edges of the outer backing film 1, and ensure that their diameter is within a reasonable range of 0.5 mm to 1 mm.

[0028] Step 2: Remove the protective film and perform initial positioning. Peel off the easy-tear strip 5 at the bottom of the outer backing film 1 to expose the outer backing film 1.

[0029] Align the outer backing film 1 with the skin area to be adhered to, ensuring that it covers the area smoothly and without wrinkles.

[0030] Step 3: Install and secure the infusion device Insert the infusion needle or catheter through the absorbent core 2 area at the upper end of the outer backing membrane 1 and secure it firmly to the skin.

[0031] Ensure that the absorbent core 2 is firmly bonded to the outer backing film 1 through a hot-pressing process, with no obvious gaps between them, to guarantee the overall sealing and stability.

[0032] Step Four: Observation and Monitoring The condition of the infusion site and the status of the absorbent core 2 can be observed in real time through the transparent observation window 3 located at the top of the absorbent core 2. The transparent observation window 3 is made of medical-grade transparent polyurethane material and matches the size and shape of the absorbent core 2 for easy and clear observation.

[0033] If the absorbent core 2 is found to have fully absorbed the liquid or has reached the replacement standard, proceed to the next step.

[0034] Step 5: Removal and Replacement Pinch the easy-tear strip 5 at the lower end of the outer backing film 1, and slowly and steadily peel the entire extravasation protection fixation patch off the skin.

[0035] Check the condition of the skin after removal and replace with a new extravasation protection patch if necessary. Repeat steps one through four to complete the installation and use of the new patch.

[0036] Example: Example 1: Application of Basic Infusion Extravasation Prevention and Fixation Adhesive This embodiment describes the application of a basic extravasation protection dressing in a routine intravenous infusion process. First, the operator must ensure their hands are clean and disinfected before operation. After removing the basic extravasation protection dressing, it is observed that its outer backing film 1 has a rectangular structure with rounded corners on all four sides. This design effectively prevents accidental scratches to the patient's delicate skin during application or use. Several breathable micropores are evenly distributed along the left and right edges of the outer backing film 1. These micropores ensure breathability while maintaining overall waterproof performance.

[0037] Next, the operator peels off the pre-installed tear strip 5 at the lower end of the outer backing film 1, and smoothly covers the main body of the product onto the skin surrounding the predetermined puncture area. Then, the infusion needle is inserted through the absorbent core 2 area at the upper end of the outer backing film 1 and securely fixed to the skin. The absorbent core 2 is bonded to the outer backing film 1 using an advanced thermoforming process; the joint between the two is tight and seamless, ensuring the integrity and sealing of the product and effectively preventing leakage of bodily fluids.

[0038] During use, medical staff or patients can clearly observe the skin condition at the infusion site and the absorption status of the absorbent core 2 through the transparent observation window 3 located at the top of the absorbent core 2. The transparent observation window 3 is made of medical-grade transparent polyurethane material, and its size and shape perfectly match the absorbent core 2 below, providing an excellent field of view. When the absorbent core 2 expands due to absorbing the medication or reaches saturation, it can be completely removed by pinching the easy-tear strip 5, and replaced with a new product as needed, thereby continuously ensuring the safety and comfort of the infusion process.

[0039] Example 2: Application of reinforced extravasation protection adhesive tape This embodiment demonstrates the structural advantages of the reinforced extravasation protection dressing and its application in high-risk infusion scenarios. The core of this product lies in its unique reinforced edge 4 design. Before use, the operator will notice that the outer ends of the absorbent core 2 and the transparent observation window 3 are surrounded by a robust reinforced edge 4. This reinforced edge 4 has a ring-shaped structure, significantly enhancing the mechanical strength of the product in critical areas, making it less prone to deformation or damage when subjected to external pulling or friction. This makes it particularly suitable for children, agitated patients, or situations requiring long-term indwelling catheters.

[0040] In practice, the operator first removes the easy-tear strip 5 at the lower end of the outer backing film 1, and then smoothly applies the product to the skin. The outer backing film 1 itself has good flexibility and conformability, and can closely fit the skin contours of different areas. After the infusion device is passed through the absorbent core 2, the presence of the reinforcing edge 4 further locks the position of the product, preventing displacement due to movement.

[0041] The internal structure of the absorbent core 2 is ingeniously designed, consisting of a flow-guiding layer 21, an absorbent layer 22, and a leak-proof bottom membrane 23 from top to bottom. The flow-guiding layer 21, located at the top, is made of hydrophilic non-woven fabric, which quickly diffuses any leaked medication laterally, preventing localized accumulation. The absorbent layer 22 below is filled with superabsorbent polymer particles, which absorb and lock in a large amount of liquid, keeping the surface dry. The leak-proof bottom membrane 23 at the bottom acts as the final barrier, made of airtight polyethylene film, completely preventing leakage into the external environment. The entire process is safe and reliable, greatly reducing the risk of extravasation during infusion.

[0042] Example 3: Application of High-Transparency Observation Type Infusion Extravasation Prevention and Fixation Patch This embodiment focuses on the application value of a high-transparency observation-type extravasation protection fixation patch in clinical monitoring. A significant feature of this product is the transparent observation window 3 at its upper end, which perfectly matches the size and shape of the absorbent core 2. This observation window is not an ordinary plastic sheet, but is made of medical-grade transparent polyurethane material, possessing excellent biocompatibility and clarity.

[0043] In practical use, after the operator applies the product to the patient's skin, they can continuously and intuitively monitor the puncture site through the transparent observation window 3 without frequently removing the dressing. This is crucial for the timely detection of early signs of redness, swelling, bleeding, or infection. The transparent observation window 3 has extremely high transparency, barely affecting the assessment of subcutaneous blood vessel direction and infusion patency.

[0044] Meanwhile, the product's absorption function is equally outstanding. The guide layer 21 (hydrophilic non-woven fabric) inside the absorbent core 2 quickly guides exudate, while the superabsorbent polymer particles in the absorbent layer 22 efficiently absorb and solidify it. Even if a small amount of extravasation occurs during prolonged infusion, it can be quickly absorbed and firmly locked in, preventing leakage through the bottom anti-leakage membrane 23. The breathable micropores on the outer backing membrane 1 ensure normal skin respiration, avoiding dermatitis caused by dampness and heat. This design, which combines highly efficient absorption with convenient observation, greatly improves the efficiency and quality of nursing care.

[0045] Example 4: Application of Comfortable and Breathable Infusion Extravasation Protective Fixation Patch This embodiment illustrates how a comfortable and breathable infusion extravasation protection fixation patch improves the patient's wearing experience. The core design element of this product is optimized breathability; several equidistantly arranged micropores are carefully created along the left and right edges of its outer backing film 1. The diameter of these micropores is precisely controlled to ensure free airflow while effectively blocking the intrusion of external dust and bacteria.

[0046] During use, the operator first covers the area around the puncture site with the product. Because the outer backing membrane 1 is rectangular with rounded corners, the patient will not experience any discomfort or stinging during wear. As the infusion proceeds, moisture produced by the skin can be promptly expelled through these breathable micropores, while fresh air from the outside can enter, forming a small, benign microcirculation system. This effectively solves the problems of skin itching and redness caused by traditional dressings due to their lack of breathability.

[0047] Furthermore, the structure of the product's absorbent core 2 also contributes to comfort. The top guiding layer 21 is soft and skin-friendly, reducing irritation to newly formed tissue; while the bottom leak-proof membrane 23, although not breathable, has a smooth surface that reduces friction with the skin. The entire absorbent core 2 is tightly bonded to the outer backing membrane 1 through a thermo-pressing process, ensuring both airtightness and structural stability. Even if patients need to wear it for extended periods, they can experience continuous dryness and comfort, significantly improving treatment adherence.

[0048] Example 5: Application of Comprehensive Protective Infusion Extravasation Prevention and Fixation Patch This embodiment comprehensively demonstrates the complete application process of an infusion extravasation protective fixation patch that integrates multiple protective functions. The product is designed with various clinical needs in mind, combining structural strength, absorption efficiency, ease of observation, and wearing comfort.

[0049] Before use, the operator will thoroughly inspect all components of the product: the rounded corners and breathable micropores of the outer backing film 1, the three-layer composite structure of the absorbent core 2 (flow guiding layer 21, absorbent layer 22, and leak-proof bottom membrane 23), the transparent observation window 3 at the top, and the reinforced edges 4. After confirming that everything is in order, remove the easy-tear strip 5 and accurately attach the product to the target area.

[0050] During infusion, the reinforced edges 4 provide robust edge protection to prevent the product from curling or tearing; the transparent observation window 3 allows medical staff to monitor the puncture site at any time; and the absorbent core 2 acts like a highly efficient "miniature reservoir," quickly absorbing any possible leakage. The bottom anti-leakage membrane 23 serves as the last line of defense, ensuring that any leakage fluid never comes into contact with clothing or bed sheets.

[0051] When the infusion ends or needs to be changed, simply lift the easy-tear strip 5 to easily and completely remove the entire product without leaving any difficult-to-clean adhesive residue on the skin. This comprehensive protective solution not only significantly reduces the incidence of infusion complications but also lightens the workload of medical staff, making it an ideal auxiliary consumable in modern intravenous therapy.

[0052] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An infusion extravasation protection and fixation patch, comprising an outer backing film (1), characterized in that: The upper end of the outer backing membrane (1) is provided with an absorbent core (2), which includes a flow guiding layer (21), an absorbent layer (22), and a leak-proof bottom membrane (23).

2. The infusion extravasation protection and fixation patch according to claim 1, characterized in that: The upper end of the absorbent core (2) is provided with a transparent observation window (3), the outer ends of the absorbent core (2) and the transparent observation window (3) are provided with reinforced edges (4), and the lower end of the outer backing film (1) is provided with an easy-tear strip (5).

3. The infusion extravasation protection and fixation patch according to claim 1, characterized in that: The flow guiding layer (21) is located at the top of the absorbent core, and the material of the flow guiding layer is hydrophilic non-woven fabric.

4. The infusion extravasation protection and fixation patch according to claim 1, characterized in that: The absorbent layer (22) is disposed below the flow guiding layer (21), and the absorbent layer is filled with superabsorbent polymer particles.

5. The infusion extravasation protection and fixation patch according to claim 1, characterized in that: The anti-leakage bottom membrane (23) is attached to the bottom of the absorbent layer (22), and the anti-leakage bottom membrane is made of an airtight polyethylene film.

6. The infusion extravasation protection and fixation patch according to claim 2, characterized in that: The transparent observation window (3) is matched in size and shape with the absorption core (2), and the transparent observation window is made of medical-grade transparent polyurethane material.

7. The infusion extravasation protection and fixation patch according to claim 2, characterized in that: The reinforced edge (4) has a ring structure and surrounds the outer edge of the absorption core and the transparent observation window.

8. The infusion extravasation protection and fixation patch according to claim 1, characterized in that: The outer backing film (1) has a rectangular structure, and the four corners of the outer backing film are rounded to prevent skin scratches.

9. The infusion extravasation protection and fixation patch according to claim 1, characterized in that: The absorbent core (2) is compositely connected to the outer backing film (1) through a hot pressing process, and there is no obvious gap at the joint between the two.

10. The infusion extravasation protection and fixation patch according to claim 1, characterized in that: The outer backing film (1) has several equally spaced air-permeable micropores on both the left and right edges, and the diameter of the air-permeable micropores is controlled between 0.5 mm and 1 mm.

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