A negative pressure wound dressing with controllable shrinkage direction

Abstract

The application discloses a negative pressure drainage dressing with controllable shrinkage direction, which comprises a dressing body for covering a wound surface, a sealing film arranged on the top of the dressing body and used for fixing the dressing body at the wound surface and forming a sealed environment, a negative pressure device arranged in the dressing body and used for generating negative pressure to discharge exudate, an adjusting mechanism arranged in the middle of the dressing body, and a plurality of control lines arranged in the dressing body, one end of each control line being fixed to the edge of the dressing body and the other end being connected to the adjusting mechanism, and the adjusting mechanism driving the dressing body to uniformly shrink to the center by gathering the corresponding control lines. The negative pressure drainage dressing has the advantages of simple structure, convenient operation and controllable directional tension.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a negative pressure drainage dressing with controllable contraction direction. Background Technology

[0002] One of the biggest challenges in the healing process of burn wounds, especially deep second- and third-degree burns, is the high tension at the wound edges. This tension, stemming from tissue loss and myofibroblast contracture, can lead to delayed healing, severe pain, and eventually scar contracture deformities.

[0003] Currently, there are three main methods for treating wounds in clinical practice:

[0004] 1. Mechanical tension reduction: such as tension-reducing sutures and tension-reducing tape, but the tension reduction they provide is often insufficient, uncontrollable and difficult to maintain, and is not effective for high-tension wounds;

[0005] 2. Invasive surgery: such as surgical decompression, although it can effectively release tension, it will create new tissue trauma, increasing surgical risks and patient burden;

[0006] 3. Negative Pressure Wound Therapy: Negative pressure wound therapy has become one of the standard treatments for complex wound management. By applying negative pressure, it can effectively remove exudate, reduce edema, and promote granulation tissue growth. However, traditional negative pressure therapy dressings (such as polyvinyl alcohol foam or polyurethane foam) usually have an isotropic porous structure, which generates a uniform, centripetal three-dimensional contraction force on the wound surface. This contraction pattern cannot specifically counteract and alleviate the most harmful transverse tangential tension at the wound edge, and may even exacerbate traction in this direction in some cases, thus having limited effectiveness in preventing scar contracture. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a negative pressure drainage dressing with simple structure, convenient operation, controllable tension orientation, and controllable contraction direction.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0009] A negative pressure drainage dressing with controllable contraction direction includes a dressing body for covering a wound. The top of the dressing body is provided with a sealing membrane for fixing the dressing body to the wound and forming a sealed environment. The dressing body is provided with a negative pressure component for generating negative pressure to drain exudate. An adjustment mechanism is provided in the middle of the dressing body. Multiple control lines are provided in the dressing body. One end of each control line is fixed to the edge of the dressing body and the other end is connected to the adjustment mechanism. The adjustment mechanism drives the dressing body to contract uniformly towards the center by retracting the corresponding control lines.

[0010] As a further improvement to the above technical solution:

[0011] Each of the control lines is provided with fixing buckles that are fixedly connected to the dressing body at even intervals.

[0012] The adjustment mechanism includes an annular housing, a control component is movably mounted in the middle of the annular housing, a tightening component is connected to the control component in the circumferential direction, and at least one control line is connected to each tightening component.

[0013] The control component includes a rotating shaft, which is movably connected within an annular housing. A first gear connected to each tightening component is fixedly mounted on the rotating shaft, and a rotating cap for easy rotation is provided on the top of the rotating shaft.

[0014] The tightening component includes a rotating shaft, which is movably mounted inside an annular housing. A second gear that can mesh with the first gear is fixedly mounted on the rotating shaft, and the control line is wound around the rotating shaft.

[0015] The rotating shaft is axially slidably connected to the annular housing, and a clutch is provided between the annular housing and the rotating shaft, which can cause the second gear to mesh or disengage from the first gear by pressing and driving the rotating shaft to slide.

[0016] The clutch includes a mounting base, a fixed post, a spring, and a self-retracting caliper. The mounting base is fixedly installed inside the annular housing. The fixed post is located in the middle of the mounting base. The spring is sleeved on the fixed post. The self-retracting caliper is installed on a rotating shaft. The rotating shaft is sleeved on the fixed post and abuts against the spring. By pressing, the rotating shaft moves and drives the self-retracting caliper to engage with different parts of the fixed post, so that the second gear meshes with or disengages from the first gear.

[0017] The fixing column includes a first fixing layer and a second fixing layer. When the self-retracting caliper engages with the first fixing layer, the second gear and the first gear are in a meshing state. When the self-retracting caliper engages with the first fixing layer, the second gear and the first gear are in a disengaged state.

[0018] The self-retracting caliper is provided with cleats, and both the first and second fixing layers are provided with annular grooves that match the cleats.

[0019] Both the first and second fixed layers have sliding blocks on their columns to facilitate the upward disengagement of the self-retracting calipers.

[0020] A sealing gasket is also provided between the annular shell and the sealing membrane.

[0021] The negative pressure component includes a negative pressure suction cup and a negative pressure conduit. The negative pressure suction cup is disposed on the sealing membrane and communicates with the dressing body. The negative pressure conduit is connected to the negative pressure suction cup and communicates with an external negative pressure source.

[0022] Compared with the prior art, the advantages of the present invention are as follows:

[0023] This invention employs control lines with inelastic, high-strength properties fixed to the edge of the dressing body. By adjusting the control lines in different directions, the area of ​​the dressing body with the control lines is tightened, thereby creating directional, uniform, and controllable compression or wrinkling. This applies a traction force pointing towards the center of the wound to the wound edge. Its structure is simple and easy to operate, effectively reducing transverse tangential tension and achieving a targeted tension reduction effect that traditional dressings cannot achieve. By integrating negative pressure dressings with mechanical force control, this invention produces a synergistic therapeutic effect. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention.

[0025] Figure 2 This is a schematic diagram of the external structure of the adjustment mechanism in Embodiment 1 of the present invention.

[0026] Figure 3 This is a schematic diagram of the internal structure of the adjustment mechanism in Embodiment 1 of the present invention.

[0027] Figure 4 This is a schematic diagram of the clutch structure in Embodiment 1 of the present invention.

[0028] Figure 5 This is a schematic diagram of the overall structure of Embodiment 2 of the present invention.

[0029] Figure 6 This is a schematic diagram of the connection between the tightening component and the control line in Embodiment 2 of the present invention.

[0030] The labels in the diagram represent:

[0031] 1. Dressing body; 2. Negative pressure component; 21. Negative pressure suction cup; 22. Negative pressure conduit; 3. Adjustment mechanism; 31. Annular housing; 32. Control component; 321. Rotating shaft; 322. First gear; 323. Rotating cap; 33. Tightening component; 331. Rotating shaft; 332. Second gear; 4. Control line; 5. Fixing buckle; 6. Clutch component; 61. Mounting base; 62. Fixing post; 621. First fixing layer; 622. Second fixing layer; 623. Annular groove; 63. Spring; 64. Self-retracting clamp; 641. Clamping teeth; 65. Slider; 7. Sealing gasket. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Example 1:

[0034] like Figures 1 to 4As shown, a first embodiment of the negative pressure drainage dressing with controllable contraction direction of the present invention includes a dressing body 1 for covering a wound. A sealing membrane is provided on the top of the dressing body 1 for fixing the dressing body 1 to the wound and forming a sealed environment. A negative pressure component 2 is provided inside the dressing body 1 for generating negative pressure to drain exudate. An adjustment mechanism 3 is provided in the middle of the dressing body 1. Multiple control lines 4 are provided inside the dressing body 1. One end of each control line 4 is fixed to the edge of the dressing body 1 and the other end is connected to the adjustment mechanism 3. The adjustment mechanism 3 drives the dressing body 1 to contract uniformly towards the center by retracting the corresponding control lines 4. This invention employs control lines with inelastic, high-strength properties fixed to the edge of the dressing body 1. The control lines 4 in different directions are tightened by the adjustment mechanism 3, thereby causing directional, uniform, and controllable compression or wrinkling in the area of ​​the dressing body 1 with the control lines 4. This applies a traction force pointing towards the center of the wound to the edge of the wound. Its structure is simple and easy to operate, and it can effectively reduce transverse tangential tension, achieving a targeted tension reduction effect that traditional dressings cannot achieve. This invention produces a synergistic therapeutic effect by integrating negative pressure dressings with mechanical force control.

[0035] In this embodiment, each control line 4 is provided with a fixing buckle 5 that is fixedly connected to the dressing body 1 at even intervals. In this structure, the evenly arranged fixing buckles 5 form nodes, so that when the control line 4 is tightened, the contraction force at each node is consistent, preventing the outermost dressing body 1 from bulging and detaching from the skin surface.

[0036] In this embodiment, the adjustment mechanism 3 includes an annular housing 31. A control component 32 is movably mounted in the center of the annular housing 31. A tightening component 33 is connected to the control component 32 along the circumferential direction, and a control line 4 is connected to each tightening component 33. In this structure, the control component 32 controls each tightening component 33 to tighten the control line 4, thus gathering the dispersed control lines 4 and integrating them into a single module. The structure is compact and easy to operate. Furthermore, the annular housing 31 protects the internal structure from external pressure, improving reliability and durability.

[0037] In this embodiment, the control component 32 includes a rotating shaft 321, which is movably connected within the annular housing 31. A first gear 322, which is connected to each tightening component 33, is fixedly mounted on the rotating shaft 321. A rotating cap 323, which facilitates rotation, is provided on the top of the rotating shaft 321. In this structure, the rotating shaft 321 is used to wind the control line 4. Through the meshing of the first gear 322 and the second gear 332, the power of the rotating shaft 321 is efficiently and synchronously transmitted to each rotating shaft 331 to wind and unwind each control line 4. This method is labor-saving and allows for fine adjustment of the control line 4.

[0038] In this embodiment, the tightening member 33 includes a rotating shaft 331, which is movably mounted inside the annular housing 31. A second gear 332, which can mesh with the first gear 322, is fixedly mounted on the rotating shaft 331. The control line 4 is wound around the rotating shaft 331. The rotating shaft 331 is axially slidably connected to the annular housing 31. A clutch member 6 is provided between the annular housing 31 and the rotating shaft 331, which allows the second gear 332 to mesh or disengage from the first gear 322 by pressing and sliding the rotating shaft 331. In this structure, the second gear 332 in a certain direction can be meshed or disengaged from the first gear 322 by pressing or releasing the button on the top of the rotating shaft 331. This allows for independent adjustment of a single control line 4, enabling independent operation. Furthermore, when the second gear 332 is engaged or disengaged from the first gear 322, the retraction state of the control line 4 in a certain direction can be locked, preventing it from being affected when adjusting other directions.

[0039] In this embodiment, the clutch 6 includes a mounting base 61, a fixing post 62, a spring 63, and a self-retracting caliper 64. The mounting base 61 is fixedly installed inside the annular housing 31. The fixing post 62 is located in the middle of the mounting base 61. The spring 63 is sleeved on the fixing post 62. The self-retracting caliper 64 is mounted on a rotating shaft 331. The rotating shaft 331 is sleeved on the fixing post 62 and abuts against the spring 63. By pressing, the rotating shaft 331 moves and drives the self-retracting caliper 64 to engage with different parts of the fixing post 62, so that the second gear 332 meshes with or disengages from the first gear 322. The fixing post 62 includes a first fixing layer 62. When the self-retracting caliper 64 engages with the first fixed layer 621, the second gear 332 and the first gear 322 are in a meshing state; when the self-retracting caliper 64 engages with the first fixed layer 621, the second gear 332 and the first gear 322 are in a disengaged state. The self-retracting caliper 64 is provided with a cleat 641. Both the first fixed layer 621 and the second fixed layer 622 are provided with annular grooves 623 that match the cleat 641. The columns of the first fixed layer 621 and the second fixed layer 622 are slidably connected with sliders 65 to facilitate the upward disengagement of the self-retracting caliper 64. In this structure, when the self-retracting caliper 64 is between the first fixed layer 621 and the slider 65 of that layer, the spring 63 pushes the rotating shaft 331 upward, and the caliper teeth 641 engage tightly with the annular groove 623. At this time, the second gear 332 meshes with the first gear 322. When the rotating shaft 331 is pressed downward, the self-retracting caliper 64 passes over the second fixed layer 622, and the caliper teeth 641 engage tightly with the annular groove 623 at the bottom of the second fixed layer 622. At this time, the second gear 332 is disengaged from the first gear 322. Pressing down on the rotating shaft 331 causes the self-retracting caliper 64 to pass through the slider 65 on the column of that layer. Under the lifting action of the spring 63, the self-retracting caliper 64 moves the slider 65 upward. Guided by the inclined surface of the slider 65, the self-retracting caliper 64 can easily pass over the second fixed layer 622. Similarly, when disassembly is required, the slider 65 on the column of the first fixed layer 621 has the same function. The self-retracting caliper 64 can pass over the first fixed layer 621 through the slider 65 and thus detach from the fixed column 62. Its structure is simple and its design is ingenious.

[0040] In this embodiment, a sealing gasket 7 is also provided between the annular shell 31 and the sealing membrane. The sealing gasket 7 ensures the sealing effect.

[0041] In this embodiment, the negative pressure component 2 includes a negative pressure suction cup 21 and a negative pressure conduit 22. The negative pressure suction cup 21 is disposed on the sealing membrane and communicates with the dressing body 1. The negative pressure conduit 22 is connected to the negative pressure suction cup 21 and communicates with an external negative pressure source. The negative pressure suction cup 21 is a mature and reliable interface type, which can be tightly and conveniently connected to commonly used negative pressure drainage pumps through the negative pressure conduit 22.

[0042] Example 2:

[0043] like Figures 5 to 6 As shown, the second embodiment of the negative pressure drainage dressing with controllable contraction direction of the present invention is basically the same as that of embodiment 1, except that:

[0044] In this embodiment, a tightening member 33 is connected to multiple control lines 4. In this embodiment, the control lines are arranged in zones according to the differences in the shape of the wound. Multiple control lines 4 can be evenly distributed in the area to increase the pressure points of the normal skin around the irregular wound, making the wound contraction more uniform.

[0045] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, should fall within the protection scope of the present invention.

Claims

1. A negative pressure drainage dressing with controllable contraction direction, characterized in that: The dressing body (1) is used to cover the wound. The top of the dressing body (1) is provided with a sealing membrane for fixing the dressing body (1) to the wound and forming a sealed environment. The dressing body (1) is provided with a negative pressure component (2) for generating negative pressure to drain exudate. The dressing body (1) is provided with an adjustment mechanism (3) in the middle. The dressing body (1) is provided with multiple control lines (4). Each control line (4) is provided with a fixing buckle (5) that is fixedly connected to the dressing body (1) at even intervals. One end of each control line (4) is fixed to the edge of the dressing body (1) and the other end is connected to the adjustment mechanism (3). The adjustment mechanism (3) drives the dressing body (1) to shrink evenly toward the center by retracting the corresponding control lines (4).

2. The negative pressure drainage dressing with controllable contraction direction according to claim 1, characterized in that: The adjustment mechanism (3) includes an annular housing (31), a control component (32) is movably installed in the middle of the annular housing (31), a tightening component (33) is connected to the control component (32) in the circumferential direction, and at least one control line (4) is connected to each tightening component (33).

3. The negative pressure drainage dressing with controllable contraction direction according to claim 2, characterized in that: The control component (32) includes a rotating shaft (321), which is movably connected inside the annular housing (31). A first gear (322) connected to each tightening component (33) is fixed on the rotating shaft (321), and a rotating cap (323) is provided on the top of the rotating shaft (321) for easy rotation.

4. The negative pressure drainage dressing with controllable contraction direction according to claim 3, characterized in that: The tightening member (33) includes a rotating shaft (331), which is movably installed in the annular housing (31). A second gear (332) that can mesh with the first gear (322) is fixed on the rotating shaft (331), and the control line (4) is wound around the rotating shaft (331).

5. The negative pressure drainage dressing with controllable contraction direction according to claim 4, characterized in that: The rotating shaft (331) is axially slidably connected to the annular housing (31), and a clutch (6) is provided between the annular housing (31) and the rotating shaft (331) to allow the second gear (332) to mesh or separate from the first gear (322) by pressing and driving the rotating shaft (331) to slide.

6. The negative pressure drainage dressing with controllable contraction direction according to claim 5, characterized in that: The clutch (6) includes a mounting base (61), a fixing post (62), a spring (63), and a self-retracting caliper (64). The mounting base (61) is fixedly installed in the annular housing (31). The fixing post (62) is located in the middle of the mounting base (61). The spring (63) is sleeved on the fixing post (62). The self-retracting caliper (64) is installed on the rotating shaft (331). The rotating shaft (331) is sleeved on the fixing post (62) and abuts against the spring (63). By pressing, the rotating shaft (331) moves and drives the self-retracting caliper (64) to engage with different parts of the fixing post (62) so that the second gear (332) meshes with or disengages from the first gear (322).

7. The negative pressure drainage dressing with controllable contraction direction according to claim 6, characterized in that: The fixing post (62) includes a first fixing layer (621) and a second fixing layer (622). When the self-retracting caliper (64) engages with the first fixing layer (621), the second gear (332) and the first gear (322) are in a meshing state. When the self-retracting caliper (64) engages with the first fixing layer (621), the second gear (332) and the first gear (322) are in a disengaged state.

8. The negative pressure drainage dressing with controllable contraction direction according to claim 7, characterized in that: The self-retracting caliper (64) is provided with a cleat (641), and the first fixing layer (621) and the second fixing layer (622) are each provided with an annular groove (623) that matches the cleat (641).

9. The negative pressure drainage dressing with controllable contraction direction according to claim 8, characterized in that: Both the first fixing layer (621) and the second fixing layer (622) have sliding blocks (65) that facilitate the upward disengagement of the self-retracting caliper (64).

10. The negative pressure drainage dressing with controllable contraction direction according to claim 9, characterized in that: A sealing gasket (7) is also provided between the annular shell (31) and the sealing membrane.

11. The negative pressure drainage dressing with controllable contraction direction according to any one of claims 1 to 10, characterized in that: The negative pressure component (2) includes a negative pressure suction cup (21) and a negative pressure conduit (22). The negative pressure suction cup (21) is disposed on the sealing membrane and communicates with the dressing body (1). The negative pressure conduit (22) is connected to the negative pressure suction cup (21) and communicates with an external negative pressure source.

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