Trauma patch

Abstract

This application relates to a wound dressing, comprising: an adhesive layer, an absorbent layer, a sensor layer, an antibacterial layer, a release layer, and a release paper; the absorbent layer is disposed at the center of the upper surface of the adhesive layer, the sensor layer is disposed between the absorbent layer and the antibacterial layer, the release paper is disposed on the upper surface of the antibacterial layer, and the release paper is disposed on the upper surface of the release layer and adhered to the adhesive layer; the sensor layer is smaller than the size of the antibacterial layer and the absorbent layer; the sensor layer includes at least one of a temperature sensor and a pH sensor; the temperature sensor is used to monitor the temperature of the wound; the pH sensor is used to monitor the pH value of the wound exudate; the sensor layer is used to transmit at least one of the temperature and the pH value to a terminal, and / or to trigger an alarm based on at least one of the temperature and the pH value. Using this wound dressing can promote wound healing and avoid waste.

Description

Technical Field

[0001] This application relates to the field of medical supplies technology, and in particular to a wound dressing. Background Technology

[0002] Wound dressings are a common medical supply in daily life, typically used to protect wounds and absorb exudate to prevent secondary injury from exposed wounds. Before a wound heals, improper or delayed treatment can lead to infection or inflammation. Current wound dressings usually don't allow direct observation of the wound, making it difficult to detect inflammation or infection promptly. If inflammation or infection isn't treated in time, it can worsen and hinder healing. However, frequently changing wound dressings to avoid infection or inflammation can be wasteful and slow down healing due to constant exposure to air. Utility Model Content

[0003] Therefore, it is necessary to provide a wound dressing that can both promote wound healing and avoid unnecessary waste caused by excessively frequent replacement, in order to address the aforementioned technical problems.

[0004] A wound dressing includes: an adhesive layer, an absorbent layer, a sensor layer, an antibacterial layer, an isolation layer, and a release paper;

[0005] An absorbent layer is disposed at the center of the upper surface of the adhesive layer. A sensor layer is disposed between the absorbent layer and the antibacterial layer. An isolation layer is disposed on the upper surface of the antibacterial layer. Release paper is disposed on the upper surface of the isolation layer and is bonded to the adhesive layer. The size of the sensor layer is smaller than the size of the antibacterial layer and the absorbent layer. The sensor layer includes at least one of a temperature sensor and a pH sensor. The temperature sensor is used to monitor the temperature of the wound. The pH sensor is used to monitor the pH value of the wound exudate. The sensor layer is used to transmit at least one of the temperature and the pH value to a terminal, and / or to trigger an alarm based on at least one of the temperature and the pH value.

[0006] In one embodiment, the temperature sensor is encapsulated using a soft, biocompatible encapsulation material, including medical-grade silicone and polyimide.

[0007] In one embodiment, the pH sensor is encapsulated in a soft, biocompatible, and / or selectively hydrogen-permeable encapsulation material; the encapsulation material includes silica, glass film, polydimethylsiloxane, and polytetrafluoroethylene.

[0008] In one embodiment, the temperature sensor is a thermistor sensor or a thermocouple temperature sensor; the pH sensor is a hydrogen ion sensitive field-effect transistor.

[0009] In one embodiment, the sensor layer further includes a humidity sensor.

[0010] In one embodiment, the sensor layer includes a temperature sensor and a pH sensor, and also includes a microprocessor; the temperature sensor, the pH sensor, and the microprocessor are integrated via a flexible circuit board.

[0011] In one embodiment, the isolation layer is a medical nonwoven fabric, a polytetrafluoroethylene film, a gel layer, or a PE film.

[0012] In one embodiment, the wound dressing further includes a breathable support layer; the sensor layer is embedded in the breathable support layer; the sensor layer is smaller than the breathable support layer.

[0013] In one embodiment, the breathable support layer is polyurethane foam.

[0014] In one embodiment, the antibacterial layer contains silver nanoparticles.

[0015] The aforementioned wound dressing adheres to the skin via an adhesive layer, absorbs exudate via an absorbent layer, provides antibacterial and anti-inflammatory treatment to the wound via an antibacterial layer, prevents the antibacterial layer from adhering to the wound via an isolation layer, and monitors at least one of wound temperature and the pH value of wound exudate via a sensor layer. Wound temperature and pH value reflect the degree of inflammation and infection. The sensor layer triggers an alarm based on the monitored wound temperature and / or pH value, and / or transmits the monitored wound temperature and / or pH value to a terminal. The terminal can then analyze the wound temperature and / or pH value to trigger an alarm. This allows for timely replacement of the wound dressing in the early stages of inflammation and infection, preventing further deterioration of the wound and promoting wound healing. It also avoids unnecessary waste due to frequent dressing changes and prevents the wound from being constantly exposed to air, which could slow down the healing process. Furthermore, the sensor layer is smaller than the antibacterial and absorbent layers, ensuring that the sensor layer is encased within them and not directly on the skin, thus preventing damage to the skin. Attached Figure Description

[0016] Figure 1 This is a side view of the structure of a wound dressing in one embodiment;

[0017] Figure 2 This is a side view of the wound dressing structure in another embodiment;

[0018] The labels in the diagram are: 1. Adhesive layer; 2. Liquid-absorbing layer; 3. Antibacterial layer; 4. Isolation layer; 5. Release paper; 6. Sensor layer; 7. Breathable support layer. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0020] like Figure 1 As shown, in one embodiment, a wound dressing is provided, comprising: an adhesive layer 1, an absorbent layer 2, a sensor layer 6, an antibacterial layer 3, an isolation layer 4, and a release paper 5; the absorbent layer 2 is disposed at the middle position of the upper surface of the adhesive layer 1, the sensor layer 6 is disposed between the absorbent layer 2 and the antibacterial layer 3, the isolation layer 4 is disposed on the upper surface of the antibacterial layer 3, and the release paper 5 is disposed over the upper surface of the isolation layer 4 and is adhesively connected to the adhesive layer 1; the size of the sensor layer 6 is smaller than the size of the antibacterial layer 3 and the absorbent layer 2; the sensor layer 6 includes at least one of a temperature sensor and a pH sensor; the temperature sensor is used to monitor the temperature of the wound; the pH sensor is used to monitor the pH value of the wound exudate; the sensor layer 6 is used to transmit at least one of the temperature and the pH value to a terminal, and / or to trigger an alarm based on at least one of the temperature and the pH value.

[0021] The upper surface of the adhesive layer 1 is provided with adhesive. The absorbent layer 2 is connected to both the adhesive layer 1 and the antibacterial layer 3, and the antibacterial layer 3 is connected to the release layer 4. The connection methods between the absorbent layer 2 and the antibacterial layer 3 include, but are not limited to, needle punching and hydroentangling. The surface dimensions of the absorbent layer 2, the antibacterial layer 3, and the release layer 4 are the same, and the dimensions of each layer are smaller than the surface dimensions of the adhesive layer 1. The adhesive layer 1, the absorbent layer 2, the antibacterial layer 3, and the release layer 4 are all provided with ventilation holes. A portion of the upper surface of the adhesive layer 1 is connected to the absorbent layer 2, and another portion is connected to the release paper 5.

[0022] In one embodiment, the release paper 5 is a one-piece structure, and the surface shape and size of the release paper 5 are consistent with the surface shape and size of the adhesive layer 1. The release paper 5 is bonded to the adhesive layer 1 around its perimeter and covers the upper surface of the release layer 4 in the middle. Alternatively, the release paper 5 includes two components that can be opened and closed symmetrically fixed to the left and right ends (or front and back ends) of the adhesive layer 1 and cover the upper surface of the release layer 4. The release paper 5 can completely cover the adhesive side of the adhesive layer 1 and the upper surface of the release layer 4.

[0023] The sensor layer 6 can be embedded between the absorbent layer 2 and the antibacterial layer 3. Specifically, the pressure between the layers can be used to ensure that the sensor layer 6 is tightly adhered between the antibacterial layer 3 and the absorbent layer 2. The absorbent layer 2 and / or the antibacterial layer 3 have pre-set grooves. The sensor layer 6 is placed in the grooves, and can also be fixed in the grooves by means of heat pressing, gluing, etc. This ensures that the sensor layer 6 is more firmly fixed inside the wound dressing, preventing displacement due to external forces during use.

[0024] Sensor layer 6 transmits at least one of the wound temperature and pH value to the terminal. The terminal analyzes the received temperature and / or pH value to determine whether the wound is inflamed or infected, and triggers an alarm when inflammation or infection is detected. Alarm methods include, but are not limited to, visual alarms, sound alarms, and vibration alarms. Sensor layer 6 can also periodically collect temperature and / or pH values ​​during the wound healing process according to a preset cycle and transmit them to the terminal. This allows the terminal to analyze the temperature and / or pH value change curves during the wound healing process to build a wound healing model. Based on this model, it can determine whether the wound is currently abnormal and predict the wound healing trend. Communication methods between sensor layer 6 and the terminal include, but are not limited to, Bluetooth, ZigBee, and NFC. Sensor layer 6 can also analyze the monitored temperature and / or pH value, and trigger an alarm when inflammation or infection is detected based on the analysis.

[0025] In one embodiment, when determining the presence of abnormalities such as inflammation or infection based on temperature and / or pH value, reference thresholds can be set for each. When the monitored value exceeds the reference threshold, it indicates that the wound is inflamed or infected. The reference thresholds can be customized based on experience; for example, the reference threshold for temperature is 38 degrees Celsius, and the reference threshold for pH value is 7. No specific limitation is made here.

[0026] In one embodiment, the wound dressing further includes a power supply module for powering the sensor layer 6. The power supply module can be powered by, but is not limited to, flexible battery power supply, thermoelectric energy harvesting power supply, piezoelectric energy harvesting power supply, or thin-film battery power supply. Thermoelectric or piezoelectric materials can also be used. Flexible batteries can be attached to the surface of the sensor layer 6 and connected to each sensor via printed circuits or flexible leads. Power supply modules using thermoelectric energy harvesting can be integrated onto the surface of the wound dressing and connected to the sensor layer 6. Thermoelectric materials, such as bismuth telluride, convert the temperature difference between the body temperature and the ambient temperature into electrical energy. Power supply modules using piezoelectric energy harvesting can be fabricated as thin films or fibers and embedded in the adhesive layer 1 or other suitable locations. Piezoelectric materials, such as polyvinylidene fluoride, convert mechanical energy into electrical energy.

[0027] The aforementioned wound dressing is adhered to the skin via an adhesive layer 1, absorbent layer 2 absorbs exudate, antibacterial layer 3 provides antibacterial and anti-inflammatory treatment to the wound, and isolation layer 4 prevents the antibacterial layer 3 from adhering to the wound. A sensor layer 6 monitors at least one of the wound temperature and the pH value of the wound exudate. Wound temperature and pH value reflect the degree of inflammation and infection. The sensor layer 6 triggers an alarm based on the monitored wound temperature and / or pH value, and / or transmits the monitored wound temperature and / or pH value to a terminal. The terminal can then analyze the wound temperature and / or pH value to trigger an alarm. Thus, in the early stages of wound inflammation and infection, an alarm can prompt timely replacement of the wound dressing. This prevents further deterioration of wound inflammation and infection, promoting wound healing, avoids unnecessary waste due to excessive dressing changes, and prevents the wound from being frequently exposed to air, which could slow down the healing process. The sensor layer 6 is smaller than the antibacterial layer 3 and the liquid-absorbing layer 2, so that the sensor layer 6 is wrapped by the antibacterial layer 3 and the liquid-absorbing layer 2 and does not directly contact the skin, thus avoiding damage to the skin by the sensor.

[0028] In one embodiment, the temperature sensor is encapsulated using a soft, biocompatible encapsulation material, including medical-grade silicone and polyimide.

[0029] The temperature sensor is fabricated using micro-nano sensor technology. It is encapsulated using soft, biocompatible materials such as medical-grade silicone and polyimide. Due to the excellent flexibility, biocompatibility, and chemical stability of these materials, the temperature sensor will not adversely affect the wound and promotes natural wound healing.

[0030] In one embodiment, the pH sensor is encapsulated in a soft, biocompatible, and / or selectively hydrogen-permeable encapsulation material; the encapsulation material includes silica, glass film, polydimethylsiloxane, and polytetrafluoroethylene.

[0031] Encapsulation with a material possessing good flexibility, biocompatibility, and chemical stability can prevent chemical reactions between the encapsulation material and the pH sensor, and avoid the pH sensor causing additional damage to the wound. Encapsulation with a material that has selective or good permeability to hydrogen ions can prevent other substances in the exudate from interfering with the sensor and thus reducing monitoring accuracy.

[0032] In one embodiment, the temperature sensor is a thermistor sensor or a thermocouple temperature sensor. The temperature sensor is a high-precision miniature temperature sensor to accurately detect changes in wound temperature.

[0033] In one embodiment, the pH sensor is a hydrogen ion-sensitive field-effect transistor. The pH sensor is fabricated using ion-sensitive field-effect transistor technology, which results in a small size and high accuracy, facilitating timely reminders to change wound dressings and prompt treatment based on monitored pH levels.

[0034] In one embodiment, the sensor layer further includes a humidity sensor. The humidity sensor is used to detect the humidity of the wound and / or the humidity inside the wound dressing. Detecting the wound humidity via the humidity sensor provides information about the wound healing stage and whether the wound dressing needs to be replaced. For example, if the detected wound humidity exceeds a humidity threshold, it prompts for replacement of the wound dressing. The humidity threshold can be customized according to actual conditions, such as based on the critical humidity level at which a large number of bacteria can grow in the wound. Detecting the humidity inside the wound dressing via the humidity sensor can determine whether the humidity inside the wound dressing has reached or is close to saturation, that is, whether the wound dressing's ability to absorb wound exudate has reached or is close to its upper limit, so as to replace the wound dressing in a timely manner, thereby ensuring that the wound dressing can continuously and effectively protect the wound and absorb exudate.

[0035] In one embodiment, the humidity sensor includes, but is not limited to, a capacitive humidity sensor and a resistive humidity sensor. The power supply method, integration with the microprocessor, and deployment method of the humidity sensor are similar to those of temperature sensors and pH sensors, and will not be elaborated further here.

[0036] In one embodiment, the sensor layer 6 includes a temperature sensor and a pH sensor, and also includes a microprocessor; the temperature sensor, the pH sensor, and the microprocessor are integrated via a flexible circuit board.

[0037] The temperature and pH sensors transmit their monitored data to the microprocessor, which analyzes the wound's temperature and / or pH value to determine if there are any abnormalities such as inflammation or infection, and provides timely alerts. It's understandable that the power supply module can also be used to power the microprocessor.

[0038] In one embodiment, the isolation layer 4 is a medical nonwoven fabric, a polytetrafluoroethylene film, a gel layer, or a PE film. The isolation layer 4 prevents the wound from adhering to the antibacterial layer 3, thus avoiding secondary damage to the wound. The isolation layer 4, made of medical nonwoven fabric or hydrogel, not only provides isolation but also buffers external pressure on the wound, preventing the sensor from causing secondary damage.

[0039] In one embodiment, the wound dressing further includes a breathable support layer 7; the sensor layer 6 is embedded in the breathable support layer 7; the sensor layer 6 is smaller than the breathable support layer 7.

[0040] A breathable support layer 7 is placed between the absorbent layer 2 and the antibacterial layer 3. This provides sufficient space for air circulation to maintain a good gas exchange environment at the wound site, and also acts as a buffer to prevent external pressure from directly affecting the wound. Embedding the sensor layer 6 within the breathable support layer 7 avoids both excessive thickness of the wound dressing and secondary damage to the wound caused by the sensor layer 6.

[0041] In one embodiment, the breathable support layer 7 is polyurethane foam. Polyurethane foam has high porosity and is soft and elastic. Using polyurethane foam with a three-dimensional network structure as the breathable support layer 7 can provide sufficient space for air circulation without compressing the wound.

[0042] In one embodiment, the antibacterial layer 3 contains silver nanoparticles. The antibacterial layer 3 is a silver nanoparticle-loaded dressing layer. The antibacterial layer 3 includes, but is not limited to, a nano-treated needle-punched cotton layer. Because silver nanoparticles have antibacterial, anti-inflammatory, and wound-healing effects, wound dressings containing silver nanoparticles can effectively prevent wound infection and provide antibacterial and anti-inflammatory effects to inflamed and infected wounds, thereby promoting wound healing.

[0043] In one embodiment, the absorbent layer 2 is made of PVA sponge, foam dressing, cotton, or superabsorbent polymer.

[0044] In one embodiment, the adhesive layer 1 is made of adhesive nonwoven fabric.

[0045] It is worth noting that, Figure 1 and Figure 2 The present invention only illustrates a portion of the structure of the wound dressing provided in one or more embodiments of the present application, as well as the relative positional relationship between the structural components. This is merely an example and is not intended to limit the scope of the invention.

[0046] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0047] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A wound dressing, characterized in that, include: Adhesive layer, absorbent layer, sensor layer, antibacterial layer, isolation layer, and release paper; An absorbent layer is disposed at the center of the upper surface of the adhesive layer. A sensor layer is disposed between the absorbent layer and the antibacterial layer. An isolation layer is disposed on the upper surface of the antibacterial layer. Release paper is disposed on the upper surface of the isolation layer and is bonded to the adhesive layer. The size of the sensor layer is smaller than the size of the antibacterial layer and the absorbent layer. The sensor layer includes at least one of a temperature sensor and a pH sensor. The temperature sensor is used to monitor the temperature of the wound. The pH sensor is used to monitor the pH value of the wound exudate. The sensor layer is used to transmit at least one of the temperature and the pH value to a terminal, and / or to trigger an alarm based on at least one of the temperature and the pH value.

2. The wound dressing according to claim 1, characterized in that, The temperature sensor is encapsulated using a soft and biocompatible encapsulation material, including medical-grade silicone and polyimide.

3. The wound dressing according to claim 1, characterized in that, The pH sensor is encapsulated in a soft, biocompatible, and / or selectively hydrogen-permeable encapsulation material; the encapsulation material includes silica, glass film, polydimethylsiloxane, and polytetrafluoroethylene.

4. The wound dressing according to claim 1, characterized in that, The temperature sensor is a thermistor sensor or a thermocouple temperature sensor; the pH sensor is a hydrogen ion sensitive field-effect transistor.

5. The wound dressing according to claim 1, characterized in that, The sensor layer also includes a humidity sensor.

6. The wound dressing according to claim 1, characterized in that, The sensor layer includes a temperature sensor and a pH sensor, as well as a microprocessor; the temperature sensor, the pH sensor, and the microprocessor are integrated via a flexible circuit board.

7. The wound dressing according to any one of claims 1 to 6, characterized in that, The isolation layer is made of medical nonwoven fabric, polytetrafluoroethylene film, gel layer or PE film.

8. The wound dressing according to any one of claims 1 to 6, characterized in that, The wound dressing also includes a breathable support layer; the sensor layer is embedded in the breathable support layer; the sensor layer is smaller than the breathable support layer.

9. The wound dressing according to any one of claims 1 to 6, characterized in that, The breathable support layer is polyurethane foam.

10. The wound dressing according to any one of claims 1 to 6, characterized in that, The antibacterial layer contains silver nanoparticles.

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