Portable pressure-adjustable wound drainage structure

Abstract

This invention discloses a portable, pressure-adjustable wound drainage structure, relating to the field of wound treatment technology, aiming to solve the problems of poor portability, easy interruption of negative pressure, difficulty in precise pressure control, and low efficiency in exudate treatment of traditional wound drainage devices. It includes a dressing with an adhesive coating on the outer periphery of its lower end, a negative pressure unit connected to the upper end of the dressing, and an absorbent layer and a gel layer connected sequentially to the lower end. A rigid top cover is provided in the middle of the dressing, with a first connection interface on the top cover. The negative pressure unit consists of a negative pressure component and a piston. The negative pressure component has a second connection interface that connects to the first connection interface. The piston is inserted into the negative pressure component and slides under external force, forming an inner cavity with the negative pressure component. The negative pressure component can be installed horizontally or vertically to adapt to different patient needs. A fiber scaffold is provided between the dressing and the absorbent layer to prevent the absorbent layer from collapsing. A mesh pressure plate is installed on the top cover to promote exudate drainage. A sampling interface is provided in the negative pressure component for convenient exudate sampling. This structure is highly portable, can efficiently treat wound exudate, and is suitable for use in multiple scenarios.

Description

Technical Field

[0001] This invention relates to the field of wound care technology, and in particular to a portable pressure-adjustable wound drainage structure. Background Technology

[0002] Negative pressure wound therapy (NPWT) is a core intervention in modern clinical practice for promoting the healing of acute and chronic wounds. It creates a stable therapeutic environment by sealing the wound with a semi-permeable membrane and applying controlled negative pressure (typically -80 to -450 mmHg), and has become one of the standard treatment protocols for refractory wounds such as pressure ulcers and diabetic foot ulcers. This technique is not simply a drainage procedure, but achieves its therapeutic value through the synergistic effect of multiple mechanisms: the negative pressure environment actively drains wound exudate and necrotic tissue debris, reducing the accumulation of inflammatory mediators; simultaneously, it accelerates the removal of edema fluid by altering lymphatic pressure and colloid osmotic pressure, reducing local tissue swelling; more importantly, the mechanical traction of cell membranes by negative pressure triggers damage signal transduction, stimulating the secretion of healing factors such as vascular endothelial growth factor, increasing local blood perfusion by 2-3 times, and providing sufficient oxygen and nutritional support for wound repair. In addition, a closed environment can block the invasion of external microorganisms. Combined with the maintenance of a moist wound microenvironment, it can significantly reduce the bacterial colonization rate. Studies have shown that it can reduce the bacterial load on the wound by more than 60%, thus reducing the risk of infection from the source.

[0003] Current wound drainage technologies have not effectively addressed the synergistic issues of pressure regulation flexibility, portability, and exudate management safety. On one hand, traditional negative pressure devices are limited by the type of negative pressure source and pipeline design, resulting in fixed and unadjustable pressure or low adjustment precision. They cannot dynamically adjust the negative pressure value according to the wound type, and are highly dependent on electricity and have poor portability, making it difficult to meet the needs of patients in home treatment or mobile settings. In some cases, pipeline failure can even lead to negative pressure failure, causing the wound to be "soaked" in exudate and increasing the risk of infection. On the other hand, exudate management systems have significant shortcomings. The adsorption layer is easily deformed under pressure, leading to a decrease in drainage efficiency. After saturation, frequent replacement is required, increasing the burden on patients. Furthermore, the operation of exudate sampling, which requires disrupting the closed environment, further increases the probability of wound infection. Summary of the Invention

[0004] This invention provides a portable pressure-adjustable wound drainage structure, specifically comprising:

[0005] The dressing has an adhesive coating on its lower outer periphery, a negative pressure section connected to the upper end of the dressing, and the negative pressure section exerts an attractive force on the space between the dressing and the patient's wound after the dressing is applied to the wound; an absorbent layer and a gel layer are sequentially connected to the lower end of the dressing; a rigid top cover is provided in the middle of the dressing, and the rigid top cover has a first connection interface; the negative pressure section consists of a negative pressure component and a piston, and the negative pressure component has a second connection interface, which is connected to the first connection interface; the piston is inserted inside the negative pressure component and slides along the negative pressure component under the action of an external force; the piston and the negative pressure component are in an inner cavity.

[0006] Preferably, a fiber support is provided between the dressing and the absorbent layer; the fiber support supports the upper and lower end faces of the absorbent layer, and the fiber support wraps around the side face of the absorbent layer.

[0007] Preferably, the negative pressure component is installed horizontally on the upper end of the top cover; the negative pressure component is also provided with a partition plate, and the partition plate has a threaded hole; the side of the piston away from the inner cavity is fixedly connected to an mounting plate, and a threaded rod is rotatably connected to the mounting plate, and the threaded rod is inserted into the threaded hole of the partition plate; the threaded rod is engaged with the threaded hole of the partition plate.

[0008] Preferably, a handle is provided at the end of the threaded rod away from the mounting plate, and the external force is human power.

[0009] Preferably, the negative pressure component is installed longitudinally at the upper end of the top cover; the top cover is provided with at least one of the first connection interfaces, and the negative pressure component is connected to the top cover through a corresponding number of second connection interfaces.

[0010] Preferably, the upper end of the negative pressure component is provided with a tubular protrusion, and a piston is inserted inside the tubular protrusion of the negative pressure component; the upper end of the piston is provided with a threaded rod, and a rotating component is rotatably connected to the upper end of the tubular protrusion of the negative pressure component; a threaded hole is opened in the center of the rotating component, and the threaded rod is inserted into the threaded hole of the rotating component; the space between the lower end face of the piston and the bottom surface inside the negative pressure component forms an inner cavity.

[0011] Preferably, the external force is electricity; a driving component is installed on the outside of the negative pressure component, the driving component has a connection port, and the threaded rod at one end of the piston is connected to the connection port of the driving component. The driving component drives the threaded rod to rotate, thereby driving the piston to slide.

[0012] Preferably, the negative pressure component has an installation interface, through which a pressure sensor is installed to monitor the pressure in the inner cavity. When the pressure in the inner cavity is lower than a preset value, the piston is driven to slide and increase the pressure through a drive component electrically connected to the sensor.

[0013] Preferably, the top cover is provided with two symmetrical mounting holes, and the pressure plate is mounted on the upper end of the adsorption layer through the mounting holes; the part of the pressure plate inside the dressing has a mesh structure and is in close contact with the adsorption layer, and the part of the pressure plate outside the dressing is provided with a handle.

[0014] Preferably, the negative pressure component has a sampling interface on one side corresponding to the inner cavity, and the sampling interface consists of a puncture point made of cylindrical rubber and an air exchange port.

[0015] Beneficial effects

[0016] 1. In this invention, the negative pressure unit adopts a mechanical combination design of a negative pressure component and a piston, eliminating the need for the pipelines of traditional negative pressure machines. This avoids negative pressure interruptions caused by pipeline bending or compression, and supports both manual and electric external force drive: manual drive allows adjustment of the piston sliding via a handle or rotating component, suitable for scenarios without electricity; electric drive, equipped with a pressure sensor, can automatically replenish pressure when the negative pressure falls below a preset value, achieving precise pressure control. This characteristic of being unrestricted by electricity is more suitable for patients to wear for extended periods. Simultaneously, the negative pressure component offers both horizontal and vertical installation methods. Horizontal installation reduces the vertical volume, meeting the needs of patients with daily activities; vertical installation allows for multiple connection interfaces, ensuring efficient exudate entry into the internal cavity, suitable for patients with large amounts of wound exudate, balancing portability and adaptability to different clinical scenarios, thus improving the patient's user experience.

[0017] 2. In this invention, by setting a fiber scaffold between the dressing and the absorbent layer, the pressure during dressing application can be effectively distributed, preventing the absorbent layer from collapsing under pressure. It also limits the deformation of the absorbent layer to reduce residual exudate, ensuring the absorbent layer continues to perform its adsorption function. Combined with the mesh pressure plate installed on the top cover, manual pressure can squeeze the absorbent layer to expel saturated exudate, restoring its adsorption capacity without replacing the absorbent layer and extending the duration of single use. Furthermore, the inner cavity of the negative pressure component can store exudate overflowing from the absorbent layer, significantly increasing the overall exudate capacity. The sampling interface added to the negative pressure component consists of a rubber puncture point and a ventilation port, allowing exudate to be extracted for testing with a puncture needle without disassembling the entire structure. This reduces the risk of wound infection and provides convenience for clinical monitoring, further enhancing the medical practicality and safety of the structure. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0019] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0020] In the attached diagram:

[0021] Figure 1 A three-dimensional structural schematic diagram of a wound drainage structure according to an embodiment of the present invention is shown.

[0022] Figure 2 A cross-sectional schematic diagram of a dressing for a wound drainage structure according to an embodiment of the present invention is shown.

[0023] Figure 3 An assembly diagram of the negative pressure component of a wound drainage structure according to an embodiment of the present invention is shown.

[0024] Figure 4 An assembly diagram of the drive component of a wound drainage structure according to another embodiment of the present invention is shown.

[0025] Figure 5 A three-dimensional structural schematic diagram of the top cover of a wound drainage structure according to another embodiment of the present invention is shown.

[0026] Figure 6 A cross-sectional schematic diagram of the negative pressure component of a wound drainage structure according to another embodiment of the present invention is shown.

[0027] Figure 7 An assembly diagram of the pressure plate of a wound drainage structure according to another embodiment of the present invention is shown.

[0028] Figure 8 A cross-sectional view of the pressure plate of a wound drainage structure according to another embodiment of the present invention is shown.

[0029] Figure 9 A three-dimensional structural schematic diagram of the sampling interface of a wound drainage structure according to another embodiment of the present invention is shown.

[0030] Figure 10 A wound drainage structure according to another embodiment of the present invention is shown. Figure 9 A magnified view of a portion of point A shown.

[0031] List of main reference numerals

[0032] 101. Dressing; 102. Top cover; 1021. First connection interface; 1022. Mounting hole; 103. Gel layer; 104. Absorbent layer; 105. Fiber scaffold.

[0033] 201. Negative pressure component; 2011. Second connection interface; 2012. Inner cavity; 2013. Mounting interface; 202. Piston; 203. Mounting plate; 204. Threaded rod; 205. Handle; 206. Rotating component;

[0034] 3. Sensors;

[0035] 4. Drive components;

[0036] 5. Pressure plate;

[0037] 601. Sampling interface; 602. Puncture site; 603. Ventilation port. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] In this document, “illustrative” means “serving as an example, illustration or description”, and any illustration or implementation described herein as “illustrative” should not be construed as a more preferred or advantageous technical solution.

[0040] To keep the drawings concise, only the parts relevant to this application are shown schematically in each drawing, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, only one of the components with the same structure or function is shown schematically, or only one of them is labeled.

[0041] In this document, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; unless otherwise specified or explained, the term "multiple" refers to two or more; the terms "connected," "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0042] Example: Please refer to Figures 1 to 10 :

[0043] This invention proposes a portable pressure-adjustable wound drainage structure, comprising:

[0044] The dressing 101 has an adhesive coating on its outer periphery that adheres to the skin around the patient's wound, and a rigid top cover 102 in the middle for mounting the negative pressure device 201; the lower end of the dressing 101 is also provided with an absorbent layer 104 and a gel layer 103, such as... Figure 2As shown, the gel layer 103 is in direct contact with the patient's wound. In order to facilitate the outward drainage of exudate from the wound, there are a large number of tiny pores distributed throughout the gel layer 103, which allow the wound exudate to reach the adsorption layer 104 through the gel layer 103 and be absorbed by the adsorption layer 104. The adsorption layer 104 can be made of materials such as medical sponge or medical cotton ball to perform preliminary adsorption of wound exudate.

[0045] In the above embodiments concerning the dressing 101, since the dressing 101 needs to be tightly fitted to the upper part of the patient's wound, the absorbent layer 104 is easily compressed, thereby reducing the absorbent capacity of the absorbent layer 104. Therefore, the following method is provided to prevent the absorbent layer 104 from collapsing: a fiber scaffold 105 is placed between the dressing 101 and the absorbent layer 104. The fiber scaffold 105 supports the upper and lower end faces of the absorbent layer 104, and the fiber scaffold 105 wraps around the outer end face of the absorbent layer 104. By using the fiber scaffold 105, when the dressing 101 is placed on the patient's wound, even if... To ensure sufficient contact between the gel layer 103 and the wound, sufficient pressure needs to be applied to the dressing 101. However, the pressure applied to the absorbent layer 104 is shared by the fiber scaffold 105, reducing the pressure on the absorbent layer 104 and maintaining its adsorption capacity. At the same time, the fiber scaffold 105 limits the periphery of the absorbent layer 104. In the embodiment where the pressure plate 5 is provided, the fiber scaffold 105 can limit the deformation of the absorbent layer 104 in all directions when the pressure plate 5 is pressed down, reducing the residual exudate in the absorbent layer 104 after the wound exudate is discharged under pressure.

[0046] like Figure 1 and Figure 3 As shown, the top cover 102 is connected to the second connection interface 2011 of the negative pressure component 201 through the first connection interface 1021. After the dressing 101 is attached to the patient's wound skin, the suction provided by the negative pressure component 201 can pass through the top cover 102, the adsorption layer 104 and the gel layer 103 and act directly on the patient's wound, promoting the exudation of tissue fluid in the patient's wound—hereinafter referred to as wound exudate—and under the action of suction, the wound exudate passes through the gel layer 103 and reaches the adsorption layer 104 for adsorption.

[0047] In the above embodiment, the negative pressure component 201 is a hollow box, and the piston 202 is inserted inside the negative pressure component 201. Under the action of external force, the piston 202 can be driven to slide inside the negative pressure component 201, thereby forming negative pressure and providing suction. In this embodiment, the negative pressure component 201 and the dressing 101 are directly combined to avoid the problem that the existing negative pressure machine pipeline cannot provide negative pressure suction in real time due to bending or compression. At the same time, it also enables the negative pressure of the wound drainage device to be realized through mechanical structure, which can perform real-time adsorption and drainage for a long time. When the negative pressure suction weakens over time, the negative pressure suction can be adjusted directly by adjusting the piston 202. It is not limited by electricity and is more suitable for long-term wear and use.

[0048] In one embodiment, such as Figure 2 and Figure 3 As shown, the negative pressure component 201 is placed horizontally, and the piston 202 slides left and right inside the negative pressure component 201. It should be noted that in this embodiment, the second connection interface 2011 is set off to one side, which is offset from the piston 202 when it is not subjected to external force. When the piston 202 slides to the left, the negative pressure component 201 generates a negative pressure attraction.

[0049] In the above embodiment, an inner cavity 2012 is formed between the piston 202 and the inner wall of the negative pressure member 201. This inner cavity 2012 can serve as a storage cavity. When the adsorption layer 104 adsorbs the wound exudate to the upper limit, the overflowing wound exudate is sucked into the inner cavity 2012 for storage, releasing part of the space of the adsorption layer 104 and expanding the overall structure's storage capacity for wound exudate.

[0050] The following provides an embodiment of the above-mentioned horizontally arranged negative pressure component 201 and an external force sourced by human power. The negative pressure component 201 is further provided with a partition plate, and the partition plate is provided with a threaded hole. The side of the piston 202 away from the inner cavity 2012 is fixedly connected to a mounting plate 203. A threaded rod 204 is rotatably connected to the mounting plate 203 and is inserted into the threaded hole of the partition plate. The threaded rod 204 is engaged with the threaded hole of the partition plate, and a handle 205 is provided at the end of the threaded rod 204 away from the mounting plate 203.

[0051] The above-described embodiment of horizontally installed negative pressure component 201 is used to reduce the overall longitudinal width of the structure, thereby making the structure smaller and easier to carry. However, since the piston 202 needs to move in the left and right direction as shown in the attached figure in this embodiment, the second connection interface 2011 must be offset from the initial state when the piston 202 is not sliding, which limits the number and area of ​​the first connection interface 1021 and the second connection interface 2011, thus reducing the efficiency of wound exudate entering the inner cavity 2012. Based on this, the following provides a method of longitudinally setting the negative pressure component 201.

[0052] like Figure 5 , Figure 6 and Figure 7 As shown, in this embodiment, multiple first connection interfaces 1021 arranged in a matrix can be opened on the top cover 102, and a corresponding number of second connection interfaces 2011 can also be opened on the lower end face of the negative pressure component 201. It should be noted that the number of first connection interfaces 1021 can also be one. Correspondingly, when there is only one first connection interface 1021, the area of ​​the first connection interface 1021 can be set to the maximum. The significance of setting multiple first connection interfaces 1021 is that the more first connection interfaces 1021 there are, the more stable the negative pressure component 201 will be after connecting to the top cover 102 through the second connection interfaces 2011. A tubular protrusion is provided at the upper end of the negative pressure component 201, and a piston 202 is inserted inside the tubular protrusion of the negative pressure component 201. At this time, the space between the lower end face of the piston 202 and the bottom surface inside the negative pressure component 201 forms an inner cavity 2012.

[0053] In the above embodiment, when the piston 202 is manually driven to slide along the tubular protrusion of the negative pressure member 201, a threaded rod 204 is also provided at the upper end of the piston 202, and a rotating member 206 is rotatably connected to the upper end of the tubular protrusion of the negative pressure member 201. A threaded hole is provided in the center of the rotating member 206, and the threaded rod 204 is inserted into the threaded hole of the rotating member 206. Then, by rotating the rotating member 206, the piston 202 is driven to slide in the tubular protrusion of the negative pressure member 201. Compared with the method of setting the negative pressure member 201 laterally, this embodiment requires more longitudinal space, but the piston 202 and the second connection interface 2011 will not affect each other, which can ensure the efficiency of wound exudate entering the inner cavity 2012. At the same time, the height of the inner cavity 2012 can also be adjusted, thereby adjusting the volume of the inner cavity 2012.

[0054] In summary, the horizontally positioned negative pressure device 201 is more suitable for patients who need to be active in daily life and have a small amount of wound exudate, while the vertically positioned negative pressure device 201 is more suitable for patients with a large amount of wound exudate and who are unable to move independently.

[0055] In the above embodiments, the external force driving the piston 202 to slide can be electric or human-powered, such as... Figure 4 As shown, a drive component 4 is installed on the outside of the negative pressure component 201. The drive component 4 has a connection port. The threaded rod 204 at one end of the piston 202 is connected to the connection port of the drive component 4. The drive component 4 drives the threaded rod 204 to rotate, thereby driving the piston 202 to slide.

[0056] Based on the above-mentioned method of driving piston 202 through driving component 4, the pressure inside negative pressure component 201 can also be automatically adjusted through sensor 3, such as... Figure 1 , Figure 3 and Figure 4As shown, the negative pressure component 201 has an installation interface 2013, and a pressure sensor 3 is installed through the installation interface 2013 to monitor the pressure in the inner cavity 2012. When the pressure in the inner cavity 2012 is lower than a preset value, the piston 202 is driven to slide and increase the pressure through the driving component 4 which is electrically connected to the sensor 3.

[0057] In other embodiments, a pressure plate 5 is also provided to facilitate the drainage of wound exudate from the absorbent layer 104; such as Figure 7 and Figure 8 As shown, the top cover 102 is also provided with two symmetrical mounting holes 1022. The pressure plate 5 is installed on the upper end of the absorbent layer 104 through the mounting holes 1022. The part of the pressure plate 5 inside the dressing 101 is a mesh structure and is in close contact with the absorbent layer 104. The part of the pressure plate 5 outside the dressing 101 is provided with a handle. When the pressure plate 5 is pressed down through the handle, the middle part of the pressure plate 5 will squeeze the absorbent layer 104 to discharge the wound exudate absorbed inside the absorbent layer 104. The wound exudate is then absorbed into the inner cavity 2012 through the gaps in the mesh structure of the pressure plate 5, so that the saturated absorbent layer 104 can continue to absorb the wound exudate. It should be noted that although the pressure plate 5 will slide with the top cover 102, the two will still remain sealed.

[0058] In other embodiments, to extend the service life of this structure, or for purposes such as extracting wound exudate for testing, a sampling interface 601 is provided on one side of the negative pressure component 201 corresponding to the inner cavity (2012), such as... Figure 9 and Figure 10 As shown, the sampling interface 601 consists of a cylindrical rubber puncture point 602 and an air exchange port 603. The puncture point 602 is used for a puncture needle with a syringe to puncture and sample. At the same time, when it is necessary to aspirate wound exudate, another puncture needle without a syringe is needed to puncture the air exchange port 603 to balance the internal and external air pressure, so as to ensure that the puncture needle with a syringe can successfully sample.

[0059] The above description is merely a specific embodiment of this application. Under the guidance of the above teachings, those skilled in the art can make other improvements or modifications based on the above embodiments. Those skilled in the art should understand that the above specific description is only to better explain the purpose of this application, and the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A portable pressure-adjustable wound drainage structure, comprising: The dressing (101) with an adhesive coating on the outer periphery of the lower end face has a negative pressure part connected to the upper end of the dressing (101), and after the dressing (101) is covered on the patient's wound, the negative pressure part exerts an attractive force on the space between the dressing (101) and the patient's wound; the lower end of the dressing (101) is sequentially connected with an absorbent layer (104) and a gel layer (103). The dressing (101) is characterized in that a rigid top cover (102) is provided in the middle, and a first connection interface (1021) is provided on the rigid top cover (102); the negative pressure part is composed of a negative pressure component (201) and a piston (202), and the negative pressure component (201) is provided with a second connection interface (2011), and the second connection interface (2011) is connected to the first connection interface (1021); the piston (202) is inserted into the negative pressure component (201) and slides along the negative pressure component (201) under the action of an external force; the piston (202) and the negative pressure component (201) are in the inner cavity (2012). The upper end of the negative pressure component (201) is provided with a tubular protrusion, and a piston (202) is inserted inside the tubular protrusion of the negative pressure component (201); the upper end of the piston (202) is provided with a threaded rod (204), and a rotating component (206) is rotatably connected to the upper end of the tubular protrusion of the negative pressure component (201); a threaded hole is opened in the center of the rotating component (206), and the threaded rod (204) is inserted into the threaded hole of the rotating component (206); the space between the lower end face of the piston (202) and the bottom surface inside the negative pressure component (201) forms an inner cavity (2012). The top cover (102) is also provided with two symmetrical mounting holes (1022), and the pressure plate (5) is installed on the upper end of the adsorption layer (104) through the mounting holes (1022); the part of the pressure plate (5) inside the dressing (101) is a mesh structure and is in close contact with the adsorption layer (104), and the part of the pressure plate (5) outside the dressing (101) is provided with a handle.

2. The portable pressure-adjustable wound drainage structure according to claim 1, characterized in that, A fiber support (105) is provided between the dressing (101) and the absorbent layer (104); the fiber support (105) supports the upper and lower end faces of the absorbent layer (104), and the fiber support (105) wraps around the side face of the absorbent layer (104).

3. The portable pressure-adjustable wound drainage structure according to claim 1, characterized in that, The negative pressure component (201) is horizontally installed on the upper end of the top cover (102); the negative pressure component (201) is also provided with a partition plate, and the partition plate is provided with a threaded hole; the piston (202) is fixedly connected to the side away from the inner cavity (2012) with a mounting plate (203), and a threaded rod (204) is rotatably connected to the mounting plate (203), and the threaded rod (204) is inserted into the threaded hole of the partition plate; the threaded rod (204) is engaged with the threaded hole of the partition plate.

4. The portable pressure-adjustable wound drainage structure according to claim 3, characterized in that, The threaded rod (204) is also provided with a handle (205) at the end away from the mounting plate (203), and the external force is human power.

5. The portable pressure-adjustable wound drainage structure according to claim 1, characterized in that, The negative pressure component (201) is longitudinally installed on the upper end of the top cover (102); the top cover (102) is provided with at least one of the first connection interfaces (1021), and the negative pressure component (201) is connected to the top cover (102) through a corresponding number of second connection interfaces (2011).

6. The portable pressure-adjustable wound drainage structure according to claim 1, characterized in that, The external force is electricity; a drive member (4) is installed on the outside of the negative pressure member (201). The drive member (4) has a connection port. The threaded rod (204) at one end of the piston (202) is connected to the connection port of the drive member (4). The drive member (4) drives the threaded rod (204) to rotate, thereby driving the piston (202) to slide.

7. A portable pressure-adjustable wound drainage structure according to claim 6, characterized in that, The negative pressure component (201) is provided with an installation interface (2013), and a pressure sensor (3) is installed through the installation interface (2013) to monitor the pressure in the inner cavity (2012). When the pressure in the inner cavity (2012) is lower than the preset value, the piston (202) is driven to slide and increase the pressure through the drive component (4) which is electrically connected to the sensor (3).

8. The portable pressure-adjustable wound drainage structure according to claim 1, characterized in that, The negative pressure component (201) has a sampling interface (601) on one side corresponding to the inner cavity (2012). The sampling interface (601) consists of a puncture point (602) made of cylindrical rubber and an air exchange port (603).

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