Wound negative pressure drainage device

Abstract

The present invention relates to the technical field of medical devices, and in particular to a negative pressure drainage device for wounds, comprising an enclosure component, a dressing and a semipermeable membrane, wherein a dressing is provided at the bottom of the enclosure component, the dressing is placed in the treatment space formed by the enclosure component, and the semipermeable membrane covers the enclosure component and the dressing; the device also comprises a negative pressure suction component and a liquid injection component, and spring return parts are provided on opposite sides of the enclosure component, and the dressing is connected to the spring return part; the dressing has a first form and a second form. The present invention utilizes the liquid injection component to deliver flushing liquid into the treatment space formed by the enclosure component, which can dilute the secretions produced by the patient's wound to a certain extent, making it easier for it to pass through the pores inside the dressing; and the flushing liquid can keep the dressing moist, avoiding its drying and hardening, thereby effectively preventing the secretions from being retained and accumulated in the dressing, reducing the risk of clogging of the drainage device during treatment, and thus extending the service life of the negative pressure drainage device of the present invention.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a wound surface negative pressure drainage device. Background Art

[0002] VSD negative pressure drainage technology is a novel wound treatment method that promotes wound healing and reduces the risk of infection through continuous negative pressure suction. After surgery for various scars, especially those with larger surgical areas, VSD negative pressure traction can reduce incision tension, inhibit fibroblast proliferation to a certain extent, reduce scar formation, and promptly drain exudate, accelerating wound healing.

[0003] When VSD technology is used for treatment, secretions on the wound surface are drawn through the gaps in the VSD dressing under negative pressure into the drainage tube, and then out of the wound through the drainage tube. However, most infected wounds often contain some necrotic tissue, and the secretions from the wound surface are often quite viscous. When these secretions pass through the VSD dressing, they are easily retained in the VSD dressing. Moreover, as drainage time increases, the VSD dressing will become dry and hardened, and this can block the side holes of the drainage tube placed in the VSD dressing, causing the VSD device to lose its suction function.

[0004] Therefore, in closed negative pressure drainage therapy, how to reduce the risk of blockage of VSD dressing and drainage tube and extend the use time of VSD device is a technical problem that needs to be solved urgently in the existing technology. Summary of the Invention

[0005] The purpose of the present invention is to provide a wound negative pressure drainage device to address the problems existing in the prior art of how to reduce the risk of blockage of VSD dressings and drainage tubes and extend the service life of the VSD device in closed negative pressure drainage treatment.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A wound negative pressure drainage device includes a barrier component, a dressing, and a semipermeable membrane. The barrier component is used to enclose the skin of the patient's wound area to form an independent treatment space. The bottom of the barrier component is provided with a sticky dressing for fixing the barrier component on the skin of the patient's wound area.

[0008] The planar size of the dressing matches the planar size of the surrounding component. The dressing is placed in the treatment space formed by the surrounding component. The semipermeable membrane covers the surrounding component and the dressing. The semipermeable membrane is used to keep the wound area in a closed state.

[0009] The device further comprises a negative pressure suction component and a liquid injection component, wherein the negative pressure suction component is connected to the dressing and is used to form a negative pressure environment in the area covered by the semipermeable membrane; the liquid injection component is used to deliver flushing liquid into the treatment space formed by the enclosure component;

[0010] The two opposite sides of the enclosure component are further provided with spring return members, and the dressing is connected to the spring return members; the dressing has a first shape and a second shape,

[0011] Under the action of negative pressure suction, the spring return member is compressed, causing the dressing to fit the patient's wound surface, and the dressing then presents a first shape; when the spring return member naturally stretches, forming a gap between the dressing and the patient's wound surface, the dressing presents a second shape.

[0012] Preferably, the height dimension of the dressing is greater than the height dimension of the surrounding component.

[0013] Preferably, the liquid injection component is connected to the enclosure component, and the liquid outlet pipe of the liquid injection component is arranged in an area where a gap is formed between the dressing and the patient's wound surface.

[0014] Preferably, the dressing is divided into two main suction areas and one auxiliary suction area along the short axis direction. The auxiliary suction area is arranged between the main suction areas. The drainage tube of the negative pressure suction component is arranged in the auxiliary suction area. The size of the drainage tube of the negative pressure suction component matches the size of the auxiliary suction area. A number of suction channels connected to the drainage tube of the negative pressure suction component are also vertically arranged on the auxiliary suction area.

[0015] Preferably, an isolation membrane is further provided at the bottom of the main suction area in contact with the wound surface, the isolation membrane is provided with a plurality of through holes, and the contact surface of the isolation membrane with the patient's wound surface is a smooth surface.

[0016] Preferably, one side of the isolation membrane is connected to the junction of the main attraction zone and the secondary attraction zone, and the other side is connected to the bottom of the enclosure component. The width of the isolation membrane is greater than the width of the main attraction zone.

[0017] Preferably, the enclosure component is further provided with a flapping device, the flapping device comprising a flapping plate and a reset shaft, the reset shaft being connected to the enclosure component, and the flapping plate being connected to the reset shaft; a limit window is further provided on the side of the isolation membrane connected to the main suction area, the flapping plate passes through the limit window, the liquid outlet pipe of the liquid injection component is provided above the flapping plate, and the flapping plate is further provided with a water baffle, the water baffle being used to form an impact surface of the flushing liquid;

[0018] When the dressing is in the second form, the liquid injection component is used to transport flushing liquid. Under the impact of the flushing liquid, the flapping plate can rotate toward the patient's wound surface and stretch the isolation membrane. When the rotation angle of the flapping plate reaches the maximum, there is still a gap between it and the patient's wound surface.

[0019] Preferably, the flapping plate is in an inclined state in an initial state, and the distance between the free end of the flapping plate and the dressing is smaller than the distance between the fixed end of the flapping plate and the dressing.

[0020] Preferably, a receiving cavity is provided in the area of ​​the main suction zone corresponding to the slapping plate. When the dressing is in the first form, the slapping plate is accommodated in the receiving cavity and does not contact the wound surface of the patient.

[0021] Preferably, the side of the main suction area facing the patient's wound surface is configured as a concave structure.

[0022] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0023] 1. The wound surface negative pressure drainage device of the present invention, during the wound surface negative pressure drainage treatment process, utilizes the liquid injection component to deliver irrigation liquid into the treatment space formed by the enclosure component. The irrigation liquid can dilute the secretions produced by the patient's wound surface to a certain extent, making it easier for them to pass through the pores within the dressing. The irrigation liquid can also keep the dressing moist, preventing it from drying and hardening. This effectively prevents the retention and accumulation of secretions within the dressing, reduces the risk of drainage device clogging during treatment, and thus extends the service life of the negative pressure drainage device of the present invention.

[0024] Furthermore, the dressing is connected to the spring return member. Under the action of negative pressure suction, the spring return member is compressed, so that the dressing is closely attached to the patient's wound surface, ensuring the negative pressure suction effect; and when the negative pressure suction is paused or weakened, the spring return member naturally extends and returns to its original position, driving the dressing to move upward to form a gap between the dressing and the patient's wound surface. At this time, the irrigation liquid is delivered through the liquid injection component, and the irrigation liquid can more fully contact the patient's wound surface, promote the loosening and shedding of necrotic tissue and viscous secretions on the wound surface, and improve the irrigation effect; at the same time, when the dressing is in the second form, the irrigation liquid can more fully infiltrate the dressing, preventing the dressing from drying and hardening due to long-term use, and further reducing the risk of clogging of the dressing and the drainage tube;

[0025] In addition, during the negative pressure drainage treatment of the wound, the spring return element is used to periodically fit and separate the dressing from the patient's wound, thereby reducing the pressure and irritation of the dressing on the wound, promoting blood circulation in the wound area, and improving the comfort of the treatment and the healing effect of the wound.

[0026] 2. The wound surface negative pressure drainage device described in the present invention, when flushing the wound surface, first stops the negative pressure suction to make the dressing form the second shape, at this time, the flushing liquid is delivered to the wound surface through the liquid injection component. The flushing liquid flows out from the liquid outlet pipe of the liquid injection component and impacts the water baffle. During this process, the flapping plate rotates toward the patient's wound surface with the reset shaft as the axis under the impact of the water flow. At the same time, the rotation of the flapping plate drives the isolation membrane to stretch and causes the isolation membrane to generate high-frequency vibration. In this way, the secretions and necrotic tissue attached to the isolation membrane can be effectively shaken off, avoiding their accumulation on the isolation membrane, further ensuring the flushing effect. At the same time, in this embodiment, when the flapping plate rotates at the maximum angle, there is still a gap between it and the patient's wound surface. When the flushing liquid impacts the water baffle and diffuses to the inner surface of the isolation membrane, it can flow smoothly to the patient's wound surface through the through hole. In this way, with the assistance of the flushing liquid, the secretions and necrotic tissue attached to the isolation membrane can be more thoroughly removed, providing more favorable conditions for wound healing.

[0027] On the other hand, in this embodiment, the limiting window is provided on the isolation membrane, and the flapping plate is provided to pass through the limiting window, so that the flapping plate can obtain a greater degree of freedom of movement, and then the flapping plate can fully stretch the isolation membrane during the rotation process, so that the isolation membrane produces a greater deformation, thereby more effectively shaking off the secretions and necrotic tissue attached to the isolation membrane; and, in the process of flushing the patient's wound, the flapping plate is continuously rotated / reset by using a pulsed water flow. During this process, the flapping plate can disturb the flushing liquid in the gap, generate a local vortex, and make the necrotic tissue and secretions on the wound surface fall off more thoroughly, thereby further improving the flushing effect of the wound surface;

[0028] More importantly, after the flapping plate passes through the limiting window, it can avoid being blocked and interfered by the isolation membrane during the rotation and reset process, thereby ensuring the smoothness and stability of the flapping plate's rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic diagram of the cross-sectional structure of the dressing in the second form;

[0030] Figure 2 yes Figure 1 Schematic diagram of the structure of A;

[0031] Figure 3 is a schematic diagram of the cross-sectional structure of the dressing in the first form;

[0032] Figure 4 It is a schematic diagram of the first transverse cross-sectional structure of a wound negative pressure drainage device;

[0033] Figure 5 It is a schematic diagram of the second transverse cross-sectional structure of a wound negative pressure drainage device;

[0034] Figure 6 The present invention is a bottom view structural diagram of a wound negative pressure drainage device.

[0035] Markings in the figure: 1-enclosing component, 2-dressing, 3-semipermeable membrane, 4-applicator, 5-negative pressure suction component, 6-liquid injection component, 7-spring return component, 8-main suction area, 9-auxiliary suction area, 10-suction channel, 11-isolation membrane, 12-through hole, 13-flapping device, 14-flapping plate, 15-reset shaft, 16-limiting window, 17-water retaining plate, 18-accommodating chamber. DETAILED DESCRIPTION

[0036] The present invention will be described in detail below with reference to the accompanying drawings.

[0037] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.

[0038] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely represents some embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0039] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions therein may be combined with each other.

[0040] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0041] In the description of the present invention, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the inventive product is typically placed when in use, or the orientations or positional relationships commonly understood by those skilled in the art. Such terms are intended solely to facilitate the description of the present invention and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" and the like are used solely for distinction and should not be construed as indicating or implying relative importance.

[0042] Example 1: Figures 1 to 4 As shown, a wound negative pressure drainage device according to the present invention comprises an enclosure component 1, a dressing 2 and a semipermeable membrane 3. The enclosure component 1 is used to enclose the skin of the patient's wound area to form an independent treatment space. A dressing 4 is provided at the bottom of the enclosure component 1. The dressing 4 is sticky and is used to fix the enclosure component 1 on the skin of the patient's wound area.

[0043] The planar dimensions of the dressing 2 match those of the enclosing component 1. The dressing 2 is placed in the treatment space formed by the enclosing component 1. The semipermeable membrane 3 covers the enclosing component 1 and the dressing 2. The semipermeable membrane 3 is used to keep the wound area closed.

[0044] The device further includes a negative pressure suction component 5 and a liquid injection component 6. The negative pressure suction component 5 is connected to the dressing 2 and is used to form a negative pressure environment in the area covered by the semipermeable membrane 3; the liquid injection component 6 is used to deliver flushing liquid into the treatment space formed by the enclosure component 1.

[0045] The enclosure component 1 is further provided with spring return members 7 on opposite sides, and the dressing 2 is connected to the spring return members 7; the dressing 2 has a first form and a second form.

[0046] Under the action of negative pressure suction, the spring return member 7 is compressed, causing the dressing 2 to fit the patient's wound surface, and at this time the dressing 2 presents a first shape; when the spring return member 7 naturally stretches, forming a gap between the dressing 2 and the patient's wound surface, the dressing 2 presents a second shape.

[0047] Using the wound negative pressure drainage device of the present invention, during the wound negative pressure drainage treatment process, the injection component 6 is used to deliver irrigation liquid into the treatment space formed by the enclosure component 1. The irrigation liquid can dilute the secretions produced by the patient's wound to a certain extent, making it easier for them to pass through the pores inside the dressing 2. The irrigation liquid can also keep the dressing 2 moist, preventing it from drying and hardening. This effectively prevents the secretions from being retained and accumulated in the dressing 2, reduces the risk of clogging of the drainage device during treatment, and thus extends the service life of the negative pressure drainage device of the present invention.

[0048] Furthermore, the dressing 2 is connected to the spring return member 7. Under the action of negative pressure suction, the spring return member 7 is compressed, so that the dressing 2 is closely attached to the patient's wound surface, ensuring the negative pressure suction effect; and when the negative pressure suction is paused or weakened, the spring return member 7 naturally stretches and resets, driving the dressing 2 to move upward to form a gap between it and the patient's wound surface. At this time, the irrigation liquid is delivered through the liquid injection component 6, and the irrigation liquid can more fully contact the patient's wound surface, promote the loosening and shedding of necrotic tissue and viscous secretions on the wound surface, and improve the irrigation effect; at the same time, when the dressing 2 is in the second form, the irrigation liquid can more fully infiltrate the dressing 2, avoiding the dressing 2 from drying and hardening due to long-term use, further reducing the risk of clogging of the dressing 2 and the drainage tube;

[0049] In addition, during the negative pressure drainage treatment of the wound, the spring return member 7 is used to periodically fit and separate the dressing 2 from the patient's wound, which can also reduce the pressure and stimulation of the dressing 2 on the wound, promote blood circulation in the wound area, and improve the comfort of treatment and the healing effect of the wound.

[0050] Specifically, when using the present invention, the enclosure member 1 is first adhered and fixed to the skin of the patient's wound area, thereby enclosing an independent treatment space. The dressing 2 is then placed within the treatment space, with the planar dimensions of the dressing 2 matching those of the enclosure member 1 to ensure complete coverage of the wound. The semipermeable membrane 3 is then placed over the enclosure member 1 and dressing 2 to maintain a closed wound area.

[0051] After the device is installed, the negative pressure suction component 5 is activated, creating a negative pressure environment within the area covered by the semipermeable membrane 3 under the action of negative suction. At this point, the spring return member 7 moves downward under the pressure of the semipermeable membrane 3, forcing the dressing 2 to adhere closely to the patient's wound surface, achieving negative pressure drainage therapy. As treatment progresses, secretions on the wound surface, under the action of negative pressure suction, pass through the pores of the dressing 2 and enter the drainage tube of the negative pressure suction component 5, then exit the wound surface.

[0052] When wound irrigation is required, negative pressure suction is suspended. The spring return element 7 then naturally extends, driving the dressing 2 upward to create a gap between the dressing and the patient's wound. Irrigation fluid is then delivered via the injection component 6. As the fluid gradually fills the gap between the dressing 2 and the wound, it loosens necrotic tissue and viscous secretions on the wound surface, improving the irrigation effect.

[0053] After the flushing is completed, the negative pressure suction component 5 is activated again, the spring return component 7 is compressed again, the dressing 2 is closely attached to the wound surface, and the negative pressure drainage treatment is continued. This cycle is repeated until the treatment is completed.

[0054] As a preferred embodiment, based on the above method, the height of the dressing 2 is further greater than the height of the surrounding component 1. With this structural arrangement, during the negative pressure suction process, the pressure exerted by the semipermeable membrane 3 can fully act on the dressing 2, allowing the dressing 2 to better fit the patient's wound surface and ensure the effectiveness of the negative pressure suction.

[0055] As a preferred embodiment, based on the above approach, the liquid injection component 6 is further connected to the enclosure component 1, and the liquid outlet pipe of the liquid injection component 6 is located in the area forming the gap between the dressing 2 and the patient's wound surface. With this structural arrangement, when irrigating the wound surface, the irrigating liquid can directly enter the gap between the dressing 2 and the patient's wound surface. Compared to the method of irrigating liquid permeating through the dressing 2 into the gap, this method can prevent the irrigating liquid from being contaminated. It also reduces the kinetic energy loss of the irrigating liquid, further improving the irrigating effect. Finally, the irrigating liquid can reach the wound surface more quickly, making the irrigating treatment process more efficient.

[0056] As a preferred embodiment, on the basis of the above method, the dressing 2 is further divided into two main suction areas 8 and one auxiliary suction area 9 along the short axis direction, the auxiliary suction area 9 is arranged between the main suction areas 8, the drainage tube of the negative pressure suction component 5 is arranged in the auxiliary suction area 9, the size of the drainage tube of the negative pressure suction component 5 matches the size of the auxiliary suction area 9, and the auxiliary suction area 9 is also vertically provided with a plurality of suction channels 10 connected to the drainage tube of the negative pressure suction component 5.

[0057] Specifically, in this embodiment, when the dressing 2 forms the first shape, the suction channel 10 is closed. Under the action of negative pressure suction, secretions from the patient's wound surface mainly enter the drainage tube of the negative pressure suction component 5 through the main suction area 8 and are then discharged. When the dressing 2 forms the second shape and the wound surface is flushed, the suction channel 10 is opened. At this time, the flushing fluid delivered to the wound surface can enter the drainage tube of the negative pressure suction component 5 along the suction channel 10 and be discharged together with the secretions. This structural design can speed up the discharge of the flushing fluid and improve treatment efficiency. On the other hand, during flushing treatment, the flushing fluid is discharged through the suction channel 10, which can reduce the risk of necrotic tissue and secretions clogging the dressing 2.

[0058] Furthermore, the size and number of the suction channels 10 in this embodiment can be adjusted as needed to accommodate the wound conditions of different patients, thereby improving treatment flexibility and applicability. During wound negative pressure drainage therapy, the synergistic effect of the suction channels 10 and the negative pressure suction component 5 effectively and promptly drains secretions and flushing fluid from the wound, maintaining a clean treatment space and providing favorable conditions for wound healing.

[0059] Example 2: Figure 1 、 Figure 5 and Figure 6 As shown, the wound negative pressure drainage device described in the present invention is based on the above method. Further, the bottom of the main suction area 8 that contacts the wound is further provided with an isolation membrane 11, and a plurality of through holes 12 are provided on the isolation membrane 11. The contact surface between the isolation membrane 11 and the patient's wound is a smooth surface.

[0060] The setting of the isolation membrane 11 in this embodiment can prevent the dressing 2 from directly contacting the patient's wound, reduce the irritation of the rough surface of the dressing 2 to the patient's wound, and improve the patient's comfort during treatment; and the isolation membrane 11 is set to a smooth surface structure, which can also effectively reduce the risk of it sticking to the wound. In this way, when the dressing 2 switches between the first form and the second form, it can prevent secondary damage to the wound, thereby improving the safety of treatment.

[0061] As a preferred embodiment, based on the above approach, one side of the isolation membrane 11 is connected to the intersection of the primary suction zone 8 and the secondary suction zone 9, and the other side is connected to the bottom of the enclosure member 1. The width of the isolation membrane 11 is greater than the width of the primary suction zone 8. With this structural arrangement, when the dressing 2 is formed into the first shape, the isolation membrane 11 can fully deform and conform to the patient's wound surface, effectively preventing the formation of a dead space between the isolation membrane 11 and the wound surface, ensuring drainage effectiveness.

[0062] Example 3: Figure 1 、 Figure 3 、 Figure 5 and Figure 6 As shown, a wound negative pressure drainage device according to the present invention, on the basis of the above-mentioned method, further, the enclosure component 1 is further provided with a flapping device 13, the flapping device 13 includes a flapping plate 14 and a reset shaft 15, the reset shaft 15 is connected to the enclosure component 1, and the flapping plate 14 is connected to the reset shaft 15; the side where the isolation membrane 11 is connected to the main suction area 8 is further provided with a limit window 16, the flapping plate 14 passes through the limit window 16, the liquid outlet pipe of the liquid injection component 6 is provided above the flapping plate 14, and the flapping plate 14 is further provided with a water baffle 17, the water baffle 17 is used to form an impact surface of the flushing liquid;

[0063] When the dressing 2 is in the second form, the flushing liquid is delivered by the liquid injection component 6. Under the impact of the flushing liquid, the flapping plate 14 can rotate toward the patient's wound surface and stretch the isolation membrane 11. When the rotation angle of the flapping plate 14 reaches the maximum, there is still a gap between it and the patient's wound surface.

[0064] Specifically, when the wound surface is flushed in this example, the negative pressure suction is first stopped to allow the dressing 2 to form the second shape. At this time, the flushing liquid is delivered to the wound surface through the liquid injection component 6. The flushing liquid flows out from the liquid outlet pipe of the liquid injection component 6 and impacts the water baffle 17. During this process, the flapping plate 14 rotates toward the patient's wound surface with the reset shaft 15 as the axis under the impact of the water flow. At the same time, the rotation of the flapping plate 14 drives the isolation membrane 11 to stretch and causes the isolation membrane 11 to generate high-frequency vibration, so that the secretions and necrotic tissue attached to the isolation membrane 11 can be effectively shaken off, avoiding their accumulation on the isolation membrane 11, further ensuring the flushing effect; at the same time, in this embodiment, when the rotation angle of the flapping plate 14 reaches the maximum, there is still a gap between it and the patient's wound surface. When the flushing liquid impacts the water baffle 17 and diffuses to the inner surface of the isolation membrane 11, it can flow smoothly to the patient's wound surface through the through hole 12. In this way, with the assistance of the flushing liquid, the secretions and necrotic tissue attached to the isolation membrane 11 can be more thoroughly removed, providing more favorable conditions for wound healing;

[0065] On the other hand, in this embodiment, the limiting window 16 is provided on the isolation membrane 11, and the flapping plate 14 is provided to pass through the limiting window 16, so that the flapping plate 14 can obtain a greater degree of freedom of movement, and then the flapping plate 14 can fully stretch the isolation membrane 11 during the rotation process, so that the isolation membrane 11 produces a greater deformation, thereby more effectively shaking off the secretions and necrotic tissue attached to the isolation membrane 11; and, in the process of flushing the patient's wound, the pulsed water flow is used to continuously rotate / reset the flapping plate 14. During this process, the flapping plate 14 can disturb the flushing liquid in the gap, generate a local vortex, and make the necrotic tissue and secretions on the wound surface fall off more thoroughly, thereby further improving the flushing effect of the wound surface;

[0066] More importantly, after the flapping plate 14 passes through the limiting window 16 , it can avoid being blocked and interfered by the isolation membrane 11 during the rotation and reset process, thereby ensuring the smoothness and stability of the rotation of the flapping plate 14 .

[0067] As a preferred embodiment, based on the above method, further, the slapping board 14 is in an inclined state in the initial state, and the distance between the free end of the slapping board 14 and the dressing 2 is smaller than the distance between the fixed end of the slapping board 14 and the dressing 2.

[0068] As a preferred embodiment, on the basis of the above method, further, the main suction area 8 is provided with a receiving cavity 18 in the area corresponding to the slapping plate 14. When the dressing 2 is in the first form, the slapping plate 14 is received in the receiving cavity 18, and the slapping plate 14 does not contact the patient's wound surface.

[0069] Specifically, when the dressing 2 is tightly attached to the patient's wound for negative pressure drainage, the slapping plate 14 is received in the accommodating cavity 18, thereby avoiding compression on the patient's wound and ensuring the comfort of treatment; at the same time, this structural setting can also avoid the formation of dead space at the contact point between the slapping plate 14 and the patient's wound, further ensuring the drainage effect of the present invention in actual use.

[0070] As a preferred embodiment, based on the above approach, the surface of the primary suction area 8 facing the patient's wound surface is further configured as a concave structure. With this structural configuration, the dressing 2 can generate a greater horizontal force component when closely fitting the patient's wound surface, effectively pulling the wound tissue corresponding to the accommodating cavity 18. This improves the fit between the isolation membrane 11 in the accommodating cavity 18 and the wound surface, further ensuring drainage effectiveness.

[0071] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A wound negative pressure drainage device, characterized in that: The device comprises a barrier component, a dressing and a semipermeable membrane. The barrier component is used to enclose the skin of the patient's wound area to form an independent treatment space. The bottom of the barrier component is provided with a dressing. The dressing is sticky and is used to fix the barrier component on the skin of the patient's wound area. The planar size of the dressing matches the planar size of the surrounding component. The dressing is placed in the treatment space formed by the surrounding component. The semipermeable membrane covers the surrounding component and the dressing. The semipermeable membrane is used to keep the wound area in a closed state. The device further comprises a negative pressure suction component and a liquid injection component, wherein the negative pressure suction component is connected to the dressing and is used to form a negative pressure environment in the area covered by the semipermeable membrane; the liquid injection component is used to deliver flushing liquid into the treatment space formed by the enclosure component; The two opposite sides of the enclosure component are further provided with spring return members, and the dressing is connected to the spring return members; the dressing has a first shape and a second shape, Under the action of negative pressure suction, the spring return element is compressed, causing the dressing to adhere to the patient's wound surface, and at this time the dressing presents a first shape; When the spring return element naturally stretches to form a gap between the dressing and the patient's wound surface, the dressing takes on a second shape; The liquid injection component is connected to the enclosure component, and the liquid outlet pipe of the liquid injection component is arranged in the area where the gap is formed between the dressing and the patient's wound surface; The dressing is divided into two main suction areas and one secondary suction area along the short axis direction. The secondary suction area is arranged between the main suction areas. The drainage tube of the negative pressure suction component is arranged in the secondary suction area. An isolation membrane is also provided at the bottom of the main suction area in contact with the wound surface. A plurality of through holes are provided on the isolation membrane. The contact surface of the isolation membrane with the patient's wound surface is a smooth surface.

2. The wound negative pressure drainage device according to claim 1, characterized in that: The height dimension of the dressing is greater than the height dimension of the enclosure component.

3. The wound negative pressure drainage device according to claim 2, characterized in that: The size of the liquid drainage tube of the negative pressure suction component matches the size of the auxiliary suction area, and the auxiliary suction area is vertically provided with a plurality of suction channels connected with the liquid drainage tube of the negative pressure suction component.

4. The wound negative pressure drainage device according to claim 3, characterized in that: One side of the isolation membrane is connected to the junction of the main attraction zone and the secondary attraction zone, and the other side is connected to the bottom of the enclosure component. The width of the isolation membrane is greater than the width of the main attraction zone.

5. The wound negative pressure drainage device according to claim 4, characterized in that: The enclosure component is further provided with a flapping device, which includes a flapping plate and a reset shaft, the reset shaft being connected to the enclosure component, and the flapping plate being connected to the reset shaft; a limit window is further provided on the side where the isolation membrane is connected to the main suction area, the flapping plate passes through the limit window, the liquid outlet pipe of the liquid injection component is provided above the flapping plate, and a water baffle is further provided on the flapping plate, the water baffle being used to form an impact surface for the flushing liquid; When the dressing is in the second form, the liquid injection component is used to transport flushing liquid. Under the impact of the flushing liquid, the flapping plate can rotate toward the patient's wound surface and stretch the isolation membrane. When the rotation angle of the flapping plate reaches the maximum, there is still a gap between it and the patient's wound surface.

6. The wound negative pressure drainage device according to claim 5, characterized in that: The slapping plate is in an inclined state in an initial state, and the distance between the free end of the slapping plate and the dressing is smaller than the distance between the fixed end of the slapping plate and the dressing.

7. The wound negative pressure drainage device according to claim 6, characterized in that: The main suction area is provided with a receiving cavity in the area corresponding to the slapping plate. When the dressing is in the first form, the slapping plate is accommodated in the receiving cavity and does not contact the wound surface of the patient.

8. The wound negative pressure drainage device according to claim 7, characterized in that: The side of the main suction area facing the patient's wound surface is set as a concave structure.

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