Wound dressing

Abstract

The invention relates to the field of skin wound nursing, and discloses a wound dressing. The wound dressing comprises a main body piece, volatile liquid and a heat conduction film. The main body piece comprises a first cavity and a second cavity which are communicated with each other, the first cavity is provided with a first opening, and the second cavity is provided with a second opening. The volatile liquid is arranged in the first cavity, and the first opening is provided with a heat conduction film. The third opening is formed in the main body part and communicates with the first opening, and when the heat conduction film makes contact with the human body, the volatile liquid is heated to volatilize and flows towards the third opening, so that gas in the second cavity flows outwards. The volatile liquid is arranged in the main body piece, the first cavity where the volatile liquid is located is communicated with the second cavity where the wound surface is located, when the wound surface dressing is attached to the human body, the volatile liquid is heated and volatilized through the body temperature, therefore, gas in the second cavity also flows outwards to form a negative pressure environment, equipment such as an external negative pressure pipe is not needed, and the wound surface dressing is simple in structure and high in portability.

Description

Technical Field

[0001] This invention relates to the field of skin wound care, and more specifically to a wound dressing. Background Technology

[0002] As the first line of defense for direct interaction between the human body and the external environment, the skin is highly susceptible to damage and is also a relatively fragile tissue. Post-injury wound care has always been a hot research topic. Negative pressure wound dressings are widely used in wound care due to their numerous advantages, such as automatically absorbing harmful substances like exudate from the wound, reducing microcirculatory disturbances, promoting blood flow and cell proliferation, thereby accelerating wound healing. However, existing negative pressure wound dressings suffer from problems such as complex structure and poor portability. Summary of the Invention

[0003] This invention aims to address at least one of the technical problems existing in the prior art. To this end, this invention proposes a wound dressing that simplifies its structure and improves portability.

[0004] A wound dressing according to an embodiment of the present invention includes a main body, an volatile liquid, and a thermally conductive membrane. The main body includes a first chamber and a second chamber that communicate with each other. The first chamber has a first opening, and the second chamber has a second opening. The first opening and the second opening face the same direction but are opposite to each other. The volatile liquid is disposed in the first chamber, and the thermally conductive membrane is disposed in the first opening, the thermally conductive membrane being thermally connected to the volatile liquid. The second opening surrounds the outer periphery of the wound so that the wound is located within the second chamber, the second chamber being used to contain the exudate from the wound. A third opening is disposed in the main body and communicates with the first opening. When the thermally conductive membrane comes into contact with the human body, the volatile liquid is heated and evaporates, flowing into the third opening, causing gas within the second chamber to flow outwards.

[0005] The wound dressing according to embodiments of the present invention has at least the following beneficial effects: In related technologies, in order to achieve a negative pressure environment on the wound, an external negative pressure tube is usually required, and the negative pressure tube also needs to be connected to an air extraction device to form a negative pressure environment by air extraction. Therefore, patients cannot move freely when using the wound dressing, the wound dressing has poor portability, and the structure is more complex because an external device is required. The wound dressing of the present application embodiment sets an evaporating liquid inside the main body, and the first chamber where the evaporating liquid is located is connected to the second chamber where the wound is located. When the wound dressing is attached to the human body, the body temperature causes the evaporating liquid to evaporate, thereby allowing the gas in the second chamber to flow outward to form a negative pressure environment. There is no need for external negative pressure tubes or other equipment, and the structure is simple and highly portable.

[0006] According to some embodiments of the present invention, the volatile liquid is perfluoropentane.

[0007] According to some embodiments of the present invention, the wound dressing includes a first adjustment component and a connecting channel, the connecting channel communicating between the first chamber and the third opening, the first adjustment component including a first adjustment member movably disposed in the connecting channel, the first adjustment member moving within the connecting channel to change the flow rate of the connecting channel.

[0008] According to some embodiments of the present invention, the wound dressing includes a second adjustment component, the second adjustment component including a driving member and a second adjustment member, the second adjustment member being disposed on the side of the thermally conductive membrane opposite to the first chamber, the driving member being driven to adjust the contact area between the second adjustment member and the thermally conductive membrane, thereby changing the contact area between the thermally conductive membrane and the human body.

[0009] According to some embodiments of the present invention, the wound dressing includes an absorbent element disposed between the first chamber and the third opening, wherein the first chamber and the second chamber are connected to the third opening via the absorbent element.

[0010] According to some embodiments of the present invention, the first chamber and the second chamber are distributed along the length direction of the main body, and along the thickness direction of the main body, the third opening is spaced apart on the side of the first chamber opposite to the first opening.

[0011] According to some embodiments of the present invention, the wound dressing includes a pH meter and a connecting channel, the connecting channel communicating with the first chamber, the second chamber and the third opening, the pH meter being disposed in the connecting channel, and the pH meter being used to detect the pH of the exudate.

[0012] According to some embodiments of the present invention, the wound dressing further includes a covering layer disposed on the side of the second chamber opposite to the second opening, the covering layer being used to cover the wound.

[0013] According to some embodiments of the present invention, the wound dressing further includes a filter that passes through the covering layer, with both ends of the filter connected to external air and the second chamber, respectively. The filter is used to filter gas entering the second chamber, and the air inlet flow rate of the filter is less than the air outlet flow rate of the second chamber.

[0014] According to some embodiments of the present invention, the wound dressing includes a sealing layer connected to the main body, the sealing layer being disposed around the outer periphery of the first opening and the second opening, and the sealing layer being used to adhere to the human body so that the wound dressing is sealed to the human body.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a top perspective view of a wound dressing according to one embodiment of the present invention; Figure 2 This is a bottom perspective view of the wound dressing according to the first embodiment of the present invention; Figure 3 This is a bottom perspective view of the wound dressing according to the second embodiment of the present invention; Figure 4 This is a schematic diagram of the internal structure of a wound dressing according to one embodiment of the present invention.

[0017] Reference numerals: Wound dressing 100, main body 101, drive component 102, knob 103, pH meter 104, filter 105, sealing layer 106, first opening 201, second opening 202, second adjustment component 203, volatile liquid 401, thermal conductive film 402, first chamber 403, second chamber 404, exudate 405, covering layer 406, first layer 407, second layer 408, third layer 409, absorbent component 410, connecting channel 411, first adjustment component 412, microporous membrane 413, third opening 414. Detailed Implementation

[0018] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0019] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are 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 limiting this invention.

[0020] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0021] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0022] In the description of this invention, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0023] refer to Figure 1 , Figure 2 and Figure 4According to an embodiment of the present invention, a wound dressing 100 includes a main body 101, an volatile liquid 401, and a thermally conductive film 402. The main body 101 includes a first chamber 403 and a second chamber 404 that are interconnected. The first chamber 403 has a first opening 201, and the second chamber 404 has a second opening 202. The first opening 201 and the second opening 202 are oriented in the same direction but opposite to each other. The volatile liquid 401 is disposed within the first chamber 403. The first opening 201 is provided with the thermally conductive film 402, which is thermally connected to the volatile liquid 401. The second opening 202 surrounds the outer periphery of the wound so that the wound is located within the second chamber 404, which is used to contain the exudate 405 of the wound. The third opening 414 is located on the main body 101 and communicates with the first opening 201. When the heat-conducting film 402 comes into contact with the human body, the volatile liquid 401 evaporates due to heat and flows into the third opening 414, causing the gas in the second chamber 404 to flow outward. In related technologies, in order to achieve a negative pressure environment on the wound, an external negative pressure tube is usually required. The negative pressure tube also needs to be connected to an air extraction device to form a negative pressure environment by air extraction. Therefore, patients cannot move freely when using the wound dressing 100, the wound dressing 100 has poor portability, and its structure is more complex because it requires external equipment. The wound dressing 100 of this application embodiment has an evaporating liquid 401 inside the main body 101, and the first chamber 403 where the evaporating liquid 401 is located is connected to the second chamber 404 where the wound is located. When the wound dressing 100 is attached to the human body, the body temperature causes the evaporating liquid 401 to evaporate, thereby allowing the gas in the second chamber 404 to flow outward to form a negative pressure environment. No external negative pressure pipe or other equipment is required, and the structure is simple and highly portable.

[0024] It should be noted that, in some embodiments of the present invention, the thermally conductive film 402 can be a thin film separately covering the first opening 201, or it can be a liquid reservoir with a film directly disposed in the first chamber 403. The thermally conductive film 402 is formed on the lower surface of the liquid reservoir, and an opening is provided at the upper end of the liquid reservoir, which communicates with the connecting channel 411 or the third opening 414. Using the form of a liquid reservoir makes it more convenient to control the volatile liquid 401 during the manufacturing of the wound dressing 100, preventing liquid loss. The thermally conductive film 402 or the liquid reservoir can be made of an ultra-thin polymer film, which is both waterproof and does not hinder the heat transfer to the volatile liquid 401 to cause it to evaporate.

[0025] In some embodiments of the present invention, the volatile liquid 401 is perfluoropentane. Perfluoropentane has a boiling point of 29°C. Therefore, when placed in the first chamber 403, the body temperature of the wound dressing 100 upon contact with the human body causes the perfluoropentane to vaporize, causing the gas in the first chamber 403 to flow towards the third opening 414. This, in turn, drives the gas flow in the second chamber 404, creating a negative pressure environment. The low boiling point makes the gas change process significant, and the formation of the negative pressure environment is remarkably effective. Furthermore, perfluoropentane meets the ISO 10993 biocompatibility standard, is non-cytotoxic, and does not produce irritating residues, making it suitable for application on the skin. In some embodiments, the volatile liquid 401 can also be a volatile liquid such as alcohol. Although these liquids have boiling points higher than human body temperature, their volatility is relatively high, still able to drive the gas flow in the second chamber 404 to create a negative pressure environment, facilitating the absorption of exudate 405.

[0026] refer to Figure 1 and Figure 4 In some embodiments of the present invention, the wound dressing 100 includes a first adjusting component and a connecting channel 411. The connecting channel 411 connects the first chamber 403 and the third opening 414. The first adjusting component includes a first adjusting member 412, which is movably disposed within the connecting channel 411. The movement of the first adjusting member 412 within the connecting channel 411 can change the flow rate of the connecting channel 411. This design allows for adjustment of the first adjusting member 412 to change the flow rate of the connecting channel 411, thereby controlling the flow rate of the volatile liquid 401. The ultimate goal is to change the gas flow velocity and pressure change rate within the second chamber 404, achieving adjustable negative pressure. This allows the wound dressing 100 to adapt to the negative pressure requirements of different wound environments, thus meeting the specific needs of different patients and different healing processes. Specifically, refer to... Figure 1 and Figure 4 In some embodiments of the present invention, the first adjusting member 412 is a regulating valve, disposed within the connecting channel 411, while a knob 103 is also disposed outside the main body 101. Flow rate regulation is achieved by rotating the knob 103 to change the opening degree of the regulating valve. It should be noted that, referring to… Figure 4 In some embodiments, the connecting channel 411 connects to the second chamber 404 at the outlet position of the first adjusting member 412. That is, the first adjusting member 412 is positioned before the first chamber 403 connects to the second chamber 404, ensuring that the first adjusting member 412 only controls the flow rate of the evaporating gas of the evaporating liquid 401, without directly affecting the flow of gas or exudate 405 in the second chamber 404. In some embodiments, the first adjusting component may also be directly provided with a pin movably connected to the main body 101. The pin passes through the connecting channel 411 and extends relative to the outer surface of the main body 101, for example... Figure 1The knob 103 shown is a push-pull pin. By pushing and pulling the pin, its volume in the connection channel 411 is changed to achieve flow control.

[0027] refer to Figures 1 to 3 In some embodiments of the present invention, the wound dressing 100 includes a second adjustment component, which includes a drive member 102 and a second adjustment member 203. The second adjustment member 203 is disposed on the side of the thermally conductive film 402 opposite to the first chamber 403. The drive member 102 is driven to adjust the contact area between the second adjustment member 203 and the thermally conductive film 402, thereby changing the contact area between the thermally conductive film 402 and the human body. Because this application is made based on the principle of heating liquid evaporation by the patient's body temperature, therefore... Figure 2 and Figure 3 As shown, the second adjusting member 203 can adjust its length, thereby increasing ( Figure 3 (as shown) or reduce ( Figure 2 (As shown) The contact area between the heat-conducting film 402 and the human body changes the total heat received by the volatile liquid 401, changes the evaporation amount, and adjusts the influence of the human body temperature on the evaporation rate of the volatile liquid 401, thereby increasing or decreasing the evaporation rate of the volatile liquid 401.

[0028] refer to Figures 1 to 3 In some embodiments of the present invention, the driving component 102 is a roller, and the second adjusting component 203 is a heat insulation sheet wound around the outer periphery of the roller. The heat insulation sheet is wound in and out by rotating the roller, which is convenient to operate and saves space, thus meeting the lightweight requirements of the wound dressing 100.

[0029] refer to Figure 4 In some embodiments of the present invention, the wound dressing 100 includes an absorbent component 410, which is disposed between the first chamber 403 and the third opening 414. The first chamber 403 and the second chamber 404 are connected to the third opening 414 through the absorbent component 410. The absorbent component 410 can effectively improve the ability of the wound dressing 100 to absorb volatile liquid 401 and exudate 405, reduce the situation where volatile liquid 401 evaporates and exudate 405 flows out of the wound dressing 100 after negative pressure is generated in the second chamber 404, and keep the exudate 405 as much as possible in the wound dressing 100 and dispose of it together after use, thereby improving cleanliness. Specifically, in some embodiments of the present invention, the absorbent component 410 is made of sponge material, which has strong absorbency and occupies little space, or it is made of porous material such as fiber cloth for absorbent.

[0030] refer to Figure 4In some embodiments of the present invention, the wound dressing 100 further includes a microporous membrane 413 covering the third opening 414. The microporous membrane 413 can further prevent the outflow of exudate 405, and the microporous structure can also allow gas to pass through, ensuring the outflow of volatile gases and gas from the second chamber 404 to create a negative pressure environment. Specifically, the microporous membrane 413 can be a waterproof and breathable membrane ePTFE (expanded polytetrafluoroethylene), which has the property of blocking liquid water from entering while allowing gas molecules such as water vapor to pass through, thus meeting the requirements of the microporous membrane 413.

[0031] refer to Figure 4 In some embodiments of the present invention, the first chamber 403 and the second chamber 404 are distributed along the length direction of the main body 101, and along the thickness direction of the main body 101, the third opening 414 is spaced apart on the side of the first chamber 403 opposite to the first opening 201. This design allows the gas after the volatile liquid 401 in the first chamber 403 evaporates to be discharged through a shorter path, increasing the discharge rate and the rate of negative pressure environment formation in the second chamber 404. At the same time, the exudate 405 in the second chamber 404 will also move from the second chamber 404 to above the first chamber 403, that is... Figure 4 The positions of the suction element 410 and the third opening 414 are designed to prevent the fluid absorbed by the suction element 410 from being directly stored on top of the wound surface. Figure 4 The location of the middle covering layer 406 improves the environmental quality of the wound, which is conducive to wound repair.

[0032] refer to Figure 1 and Figure 4 In some embodiments of the present invention, the wound dressing 100 includes a pH meter 104 and a connecting channel 411. The connecting channel 411 connects the first chamber 403, the second chamber 404, and the third opening 414. The pH meter 104 is disposed in the connecting channel 411 and is used to detect the pH of the exudate 405. When the exudate 405 is drawn out due to a negative pressure environment, it flows into the connecting channel 411. The pH meter 104 disposed in the connecting channel 411 can directly detect the pH value of the exudate 405, directly reflecting the wound healing progress and whether infection has occurred without repeatedly disassembling and reassembling the wound dressing 100, making the wound healing environment more stable. For example, a detected pH value between 7.0 and 7.4 indicates good wound healing progress. If the pH value of the exudate 405 rises sharply, it may indicate a high risk of infection, requiring further anti-infection and other follow-up treatments. Specifically, in some embodiments of the present invention, the pH meter 104 can use a pH colorimetric card, and as shown in the figure... Figure 1 and Figure 4A portion of the card is inside the connection channel 411, while the other portion is exposed on the main body 101, allowing the pH value of the current exudate 405 to be seen directly. The colorimetric card can be detachably connected to the main body 101, so that the used colorimetric card can be removed and a new colorimetric card can be inserted.

[0033] refer to Figure 4 In some embodiments of the present invention, the wound dressing 100 further includes a covering layer 406, which is disposed on the side of the second chamber 404 opposite to the second opening 202, and is used to cover the wound. The covering layer 406 can protect the wound, prevent external environmental contamination, and facilitate wound repair.

[0034] Further, refer to Figure 4 In some embodiments of the present invention, the covering layer 406 has a three-layer structure, comprising a first layer 407, a second layer 408, and a third layer 409. The first layer 407 is directly connected to the second chamber 404 and may come into direct contact with the wound during use. Therefore, an oily insulating material is used to continuously lubricate and isolate the wound, preventing the newly formed tissue from adhering to the covering layer 406. Specifically, the first layer 407 can be made of polymeric materials such as polyethylene glycol (PEG), polyacrylamide, polyvinyl alcohol, and sodium alginate, with a thickness between 0.1-1 mm. PEG molecules have strong hydrophilicity and can adsorb a large number of water molecules, forming a highly hydrated layer on the wound surface, significantly reducing the coefficient of friction and providing lubrication. This physical barrier and lubricating properties together prevent the dressing from mechanically adhering to the newly formed wound tissue; secondly, PEG provides a stable and moist microenvironment for the wound surface through its water-locking and moisturizing capabilities. The moist environment prevents wound exudate from drying and forming scabs (scabs are prone to adhering to the dressing) and prevents newly formed epithelial tissue from directly adhering to the dressing surface due to dryness. Alternatively, you can choose oily dressings such as Vaseline gauze or paraffin oil gauze as the first layer of 407.

[0035] The second layer 408 is located on the side of the first layer 407 away from the second chamber 404. It is made of gauze or other materials with a thickness between 2mm and 5mm. It serves to keep warm, prevent impact, absorb some of the exudate 405, and also prevent external bacteria from entering the second chamber 404.

[0036] The third layer 409 is located on the side of the second layer 408 away from the first layer 407. It is made of materials such as low-density polyethylene, polypropylene, and polyester, with a thickness of 0.01 to 0.3 mm. It is non-toxic, flexible, and transparent, making it easy to observe the seepage situation. In addition, the third layer 409 can also play a sealing role. A good seal can ensure the formation of a good low-pressure area, which is conducive to the discharge of the exudate 405.

[0037] refer to Figures 1 to 4In some embodiments of the present invention, the wound dressing 100 further includes a filter 105, which penetrates the covering layer 406. Both ends of the filter 105 are connected to external air and the second chamber 404, respectively. The filter 105 is used to filter the gas entering the second chamber 404, and the air inlet flow rate of the filter 105 is less than the air outlet flow rate of the second chamber 404. The filter 105 allows the filtered gas to enter the second chamber 404, preventing the oxygen concentration in the second chamber 404 from being too low, which could lead to the proliferation of anaerobic bacteria and increase the risk of infection. Furthermore, to prevent the gas entering through the filter 105 from having an excessive impact on the formation of the negative pressure environment within the second chamber 404, the air inlet flow rate of the filter 105 is set to be less than the air outlet flow rate of the second chamber 404 from the connecting channel 411 and the third opening 414. This ensures that a negative pressure environment can still be formed within the second chamber 404 during the evaporation of the volatile liquid 401, allowing the exudate 405 to be absorbed. Specifically, the air intake flow rate of filter 105 can be as low as possible. For example, if the evaporation exhaust flow rate of volatile liquid 401 is 1 cubic meter per minute, then the air intake flow rate of filter 105 should be adjusted to 0.05 cubic meters per minute, making it much smaller than the evaporation gas exhaust flow rate of volatile liquid 401, and also smaller than the exhaust flow rate of the second chamber 404. This ensures that a negative pressure can still be formed to draw out the exudate 405, while allowing oxygen to enter the second chamber 404 to avoid the oxygen concentration being too low.

[0038] refer to Figure 1 , Figure 2 as well as Figure 4 In some embodiments of the present invention, the wound dressing 100 includes a sealing layer 106, which is connected to the main body 101. The sealing layer 106 is arranged around the outer periphery of the first opening 201 and the second opening 202. The sealing layer 106 is used to adhere to the human body so that the wound dressing 100 is sealed to the human body. Sealing connection means that the sealing layer 106 is designed around the first opening 201 and the second opening 202 so that after the wound dressing 100 is applied to the human body, a sealing surface is formed between the wound dressing 100 and the human body surface, preventing gas from seeping out from the attachment point, ensuring the gas flow path and the formation of a negative pressure environment. In some embodiments, the sealing layer 106 can use pressure-sensitive adhesive, which can provide a seal while not sticking to the body surface when it needs to be removed, making it convenient to use.

[0039] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A wound dressing, characterized in that, include: The main body includes a first chamber and a second chamber that are in communication with each other. The first chamber has a first opening, and the second chamber has a second opening. The first opening and the second opening face the same direction and are opposite to each other. A volatile liquid is disposed in the first chamber, and a thermally conductive film is disposed in the first opening, the thermally conductive film being thermally connected to the volatile liquid; The second opening is used to surround the periphery of the wound so that the wound is located within the second chamber, the second chamber being used to contain the exudate from the wound; The third opening is disposed on the main body and communicates with the first opening. When the heat-conducting film comes into contact with the human body, the volatile liquid is heated and evaporates and flows into the third opening, so that the gas in the second chamber flows outward.

2. The wound dressing according to claim 1, characterized in that The volatile liquid is perfluoropentane.

3. The wound dressing of claim 1, wherein, The wound dressing includes a first adjustment component and a connecting channel. The connecting channel communicates between the first chamber and the third opening. The first adjustment component includes a first adjustment member, which is movably disposed in the connecting channel. The first adjustment member can change the flow rate of the connecting channel by moving within the connecting channel.

4. The wound dressing according to claim 1, characterized in that, The wound dressing includes a second adjustment component, which includes a driving member and a second adjustment member. The second adjustment member is disposed on the side of the thermally conductive membrane opposite to the first chamber. The driving member can be driven to adjust the contact area between the second adjustment member and the thermally conductive membrane, thereby changing the contact area between the thermally conductive membrane and the human body.

5. The wound dressing according to claim 1, characterized in that, The wound dressing includes an absorbent component, which is disposed between the first chamber and the third opening. The first chamber and the second chamber are connected to the third opening through the absorbent component.

6. The wound dressing according to claim 1, characterized in that, The first chamber and the second chamber are distributed along the length direction of the main body and along the thickness direction of the main body, the third opening is spaced apart on the side of the first chamber opposite to the first opening.

7. The wound dressing according to claim 6, characterized in that, The wound dressing includes a pH meter and a connecting channel. The connecting channel connects the first chamber, the second chamber, and the third opening. The pH meter is disposed in the connecting channel and is used to detect the pH of the exudate.

8. The wound dressing according to claim 1, characterized in that, The wound dressing also includes a covering layer disposed on the side of the second chamber opposite to the second opening, the covering layer being used to cover the wound.

9. The wound dressing according to claim 8, characterized in that, The wound dressing also includes a filter that passes through the covering layer. The two ends of the filter are respectively connected to external air and the second chamber. The filter is used to filter the gas entering the second chamber, and the air intake flow rate of the filter is less than the exhaust flow rate of the second chamber.

10. The wound dressing according to claim 1, characterized in that, The wound dressing includes a sealing layer connected to the main body and surrounding the first opening and the second opening. The sealing layer is used to adhere to the human body so that the wound dressing is sealed to the human body.

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