Wound dressing with micropump

Abstract

The utility model relates to the technical field of medical materials, functional materials and wound dressings, in particular to a wound dressing with a micro pump, which comprises a breathable adhesive tape, a first dustproof film, a second dustproof film, a breathable layer, an outer hydrophobic layer, a hydrophilic interlayer, an outer hydrophilic layer, a heating layer and an outer adhesive film. A first dustproof film and a second dustproof film are arranged at the lower end of the breathable adhesive tape, and the heating layer and the outer adhesive film form a heating mechanism used for promoting blood flow. According to the micro-pump type wound dressing with the one-way seepage discharging function, excessive seepage can be discharged from a wound in a one-way mode, so that the wound surface is prevented from being soaked by biological liquid, the heating layer emits heat, blood circulation of the wound surface is accelerated, the healing speed of the wound is increased, and the wound healing rate is increased. The heat conduction of the thin copper wires can make the heat distribution of the heating layer more uniform, and the thin copper wires can play a role in shaping, so that the two ends of the breathable adhesive tape are prevented from tilting in the use process.

Description

Technical Field

[0001] This utility model relates to the fields of medical materials, functional materials technology and wound dressing technology, and in particular to wound dressings with micro-pumps. Background Technology

[0002] Managing the biological fluid around the wound is a prerequisite for wound healing. This includes controlling bleeding and removing excess biological fluid. Excessive biological fluid can easily lead to over-moistening of the wound, which is an easily overlooked but common problem that is detrimental to wound healing. Current moisturizing dressings mainly use hydrogels or hydrocolloid dressings. They utilize the high water absorption and water retention properties of hydrogels to absorb excess exudate from the wound and maintain a relatively moist environment. Most existing wound dressings involve direct contact between hydrophilic materials, such as hydrogels or hydrophilic fibers, and some technologies also add a breathable or non-breathable film to the outside of the hydrogel dressing to enhance its moisturizing effect and prevent secondary infection.

[0003] The hydrophilic materials used in existing wound dressings are easily wetted by exudate, leading to excessive hydration of the wound. These dressings cannot solve the problem of excessive wound exudate. More importantly, they cannot drain the exudate from the wound, hindering wound healing. After absorbing wound exudate, the reduced fluid in wound dressings made of hydrophilic materials can easily cause adhesion of newly formed wound tissue. During the second dressing change, this not only causes secondary damage to the wound and aggravates the injury, but also leads to wound infection and other problems.

[0004] The existing wound dressings use hydrophilic materials that are easily wetted by exudate, leading to excessive hydration of the wound. This fails to address the problems of excessive wound exudate and the tendency for new wound tissue to adhere, affecting subsequent dressing changes. To overcome these issues, a dressing with unidirectional exudate drainage function is designed to effectively drain and remove excess exudate from the wound while maintaining a suitable microenvironment of wound humidity, preventing secondary infection, and promoting wound healing. Utility Model Content

[0005] In order to overcome the problem that the hydrophilic materials used in existing wound dressings are easily wetted by exudate, thus causing excessive hydration of the wound, and cannot solve the problem of excessive wound exudate and easy adhesion of new wound tissue, which affects subsequent dressing changes.

[0006] The technical solution of this utility model is as follows: a wound dressing with a micro-pump, comprising a breathable patch, a first dustproof film, a second dustproof film, and a breathable layer, and further comprising an outer hydrophobic layer, a hydrophilic interlayer, an outer hydrophilic layer, a heating layer, and an outer film. The lower end of the breathable patch is provided with the first and second dustproof films, and the lower end of the breathable patch is fixedly connected to the breathable layer. The breathable layer is provided with an outer hydrophobic layer inside, and an outer hydrophilic layer is provided at the upper end of the outer hydrophobic layer. A hydrophilic interlayer is provided between the outer hydrophobic layer and the outer hydrophilic layer. The upper end of the breathable patch is provided with a heating layer, and an outer film is provided on the heating layer. The outer hydrophobic layer, the hydrophilic interlayer, and the outer hydrophilic layer together constitute a micro-pump structure for transporting exudate outward, and the heating layer and the outer film constitute a heating mechanism for promoting blood flow.

[0007] Preferably, the outer hydrophobic layer is the innermost layer that comes into contact with the wound surface. The outer hydrophobic layer has pores that are evenly distributed on it, allowing exudate to pass through.

[0008] Preferably, the hydrophilic interlayer has a multi-layer structure, and the hydrophilic interlayer serves as a drainage layer for absorbing and pumping out leachate.

[0009] Preferably, the outer hydrophilic layer is the outermost layer that comes into contact with the air. The outer hydrophilic layer has a variety of micropores that are interwoven, and it is used to isolate external bacteria.

[0010] Preferably, the upper end of the breathable patch is fixedly connected to a liquid storage layer, and the lower end of the liquid storage layer is in contact with the upper end of the outer hydrophilic layer. The liquid storage layer is used to absorb and store exudates in the outer hydrophilic layer.

[0011] Preferably, the upper end of the breathable patch is fixedly connected to an upper lifting strap, with two upper lifting straps arranged symmetrically, and the lower end of the breathable patch is fixedly connected to a cotton pad.

[0012] Preferably, the end of the outer film is fixedly connected to a side carrying strap, which has an opening for inserting a fingernail. Fine copper wires are evenly distributed inside the breathable tape, which are used for heat conduction and shaping of the breathable tape.

[0013] The beneficial effects of this utility model are:

[0014] 1. By using this micro-pump type three-layer nanofiber wound dressing with unidirectional exudate drainage function, excess exudate can be drained from the wound in one direction, keeping the wound relatively dry and accelerating wound healing. At the same time, this micro-pump dressing can drain excess biological fluid from the hydrophobic side to the hydrophilic side, thereby preventing biological fluid from wetting the wound. It can be processed and prepared using low-cost, readily available hydrophobic and hydrophilic materials. The manufacturing process is relatively simple, making it a new type of wound dressing with high industrialization value.

[0015] 2. The heating layer generates heat, which accelerates blood circulation at the wound site, thereby improving the wound healing speed. The heat conduction of the fine copper wire allows for a more even distribution of heat in the heating layer, and the fine copper wire also plays a shaping role, preventing the ends of the breathable dressing from curling up and falling off during use. When it is necessary to remove the dressing, pull up the upper strap of the breathable dressing. With the help of the upper strap and the cotton pad, the dressing can be easily removed. Attached Figure Description

[0016] Figure 1 The diagram shown is a three-dimensional structural schematic of the wound dressing and breathable patch with a micro-pump of this utility model.

[0017] Figure 2 The diagram shown is a three-dimensional structural schematic of the wound dressing with a micro-pump and the dustproof film of this utility model.

[0018] Figure 3 The diagram shown is a three-dimensional structural schematic of the wound dressing with a micro-pump and the breathable layer of this utility model.

[0019] Figure 4 The diagram shown is a cross-sectional view of the wound dressing with a micro-pump and the outer hydrophobic layer of this utility model.

[0020] Figure 5 The diagram shown is a three-dimensional structural diagram of the wound dressing with a micro-pump and the hydrophilic interlayer of this utility model.

[0021] Figure 6 The diagram shown is a cross-sectional view of the wound dressing with a micro-pump and the fine copper wire of this utility model.

[0022] Figure 7 This invention relates to a wound dressing with a micro-pump. Figure 1 A magnified structural diagram of point A.

[0023] Explanation of reference numerals in the attached diagram: 1. Breathable tape; 2. Lifting strap; 3. Dustproof film one; 4. Dustproof film two; 5. Cotton pad; 6. Breathable layer; 7. Outer hydrophobic layer; 8. Hydrophilic interlayer; 9. Outer hydrophilic layer; 10. Liquid storage layer; 11. Heating layer; 12. Outer film; 13. Side lifting strap; 14. Fine copper wire. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Please see Figures 1-7This utility model provides an embodiment of a wound dressing with a micro-pump, comprising a breathable patch 1, a first dustproof film 3, a second dustproof film 4, and a breathable layer 6, and further comprising an outer hydrophobic layer 7, a hydrophilic interlayer 8, an outer hydrophilic layer 9, a heating layer 11, and an outer film 12. The lower end of the breathable patch 1 is provided with the first dustproof film 3 and the second dustproof film 4, and the lower end of the breathable patch 1 is fixedly connected to the breathable layer 6. The breathable layer 6 is provided with an outer hydrophobic layer 7, and the upper end of the outer hydrophobic layer 7 is provided with an outer hydrophilic layer 9. A hydrophilic interlayer 8 is provided between the outer hydrophobic layer 7 and the outer hydrophilic layer 9. The upper end of the breathable patch 1 is provided with a heating layer 11, and the outer film 12 is provided on the heating layer 11. The outer hydrophobic layer 7, the hydrophilic interlayer 8, and the outer hydrophilic layer 9 together constitute a micro-pump structure for transporting exudate outward, and the heating layer 11 and the outer film 12 constitute a heating mechanism for promoting blood flow.

[0026] Please see Figure 4 and Figure 5 In this embodiment, the outer hydrophobic layer 7, as the innermost layer, contacts the wound surface. The outer hydrophobic layer 7 has uniformly arranged pores that allow exudate to pass through. The hydrophilic interlayer 8 has a multi-layer structure and serves as a drainage layer for absorbing and pumping exudate. The outer hydrophilic layer 9, as the outermost layer, contacts the air. The outer hydrophilic layer 9 has abundant micropores formed in an interlaced pattern and serves to isolate external bacteria. The upper end of the breathable patch 1 is fixedly connected to a liquid storage layer 10, and the lower end of the liquid storage layer 10 contacts the upper end of the outer hydrophilic layer 9. The liquid storage layer 10 is used to absorb and store the exudate in the outer hydrophilic layer 9. The multi-layer structure design has excellent mechanical properties, giving the wound dressing a stable gradient structure.

[0027] Please see Figure 1 , Figure 6 and Figure 7 In this embodiment, the upper end of the breathable patch 1 is fixedly connected to an upper lifting strap 2, and the two upper lifting straps 2 are symmetrically arranged. The lower end of the breathable patch 1 is fixedly connected to a cotton pad 5. The end of the outer film 12 is fixedly connected to a side lifting strap 13. The side lifting strap 13 has an opening for inserting a fingernail. Fine copper wires 14 are evenly distributed inside the breathable patch 1. The fine copper wires 14 are used for heat conduction and shaping of the breathable patch 1.

[0028] The dressing comes in three sizes: 5cm*10cm, 10cm*10cm, and 15*15cm. Before use, first peel off the first dust film 3 and the second dust film 4. Align the breathable layer 6 with the wound surface, and then firmly apply the breathable patch 1 to the skin around the wound. As the wound exudate flows out continuously, it passes through the outer hydrophobic layer 7 into the hydrophilic interlayer 8, which is made of nanofiber hydrophilic material. The exudate is transported through the hydrophilic interlayer 8 to the outer hydrophilic layer 9. The exudate is then absorbed by the reservoir layer 10, which enhances the dressing's absorbency, thus completing the exudate transport process. The hydrophilic interlayer 8, the outer hydrophilic layer 9, and the reservoir layer 10 are all made of hydrophilic materials, such as polyacrylonitrile (PAN), sodium polyacrylate (SPA), and polyvinylpyrrolidone (PVP). The reservoir layer 10 has a higher absorbency than the outer hydrophilic layer 9, and the outer hydrophilic layer 9 has a higher absorbency than the hydrophilic interlayer 8. This achieves unidirectional drainage of excess exudate from the wound, keeping the wound relatively dry. For rapid wound healing, the outer hydrophobic layer 7 is made of hydrophobic materials such as polyurethane (PU), polymethyl methacrylate (PMA), and polyvinyl butyral (PVB). This layer prevents the dressing from adhering to the wound, facilitating its removal. The cotton pad 5 lifts the breathable bandage 1 a short distance. To remove the dressing, pull up the upper strap 2 above the breathable bandage 1. With the help of the upper strap 2 and the cotton pad 5, the dressing can be easily removed. In winter, when wound healing is extremely slow, the dressing can be easily removed by holding it with your fingers. Hold the side strap 13, and then peel off the outer film 12 on the heating layer 11. The heating layer 11 generates heat through an existing chemical galvanic cell reaction. After the outer film 12 is peeled off, air enters the heating layer 11, which heats up and accelerates blood circulation at the wound site, thereby improving the wound healing speed. The thermal conductivity of the fine copper wire 14 makes the heat distribution of the heating layer 11 more uniform, and the fine copper wire 14 can also play a shaping role to prevent the two ends of the breathable dressing 1 from curling up during use, which would cause the dressing to fall off.

[0029] Through the above steps, by using this micro-pump type three-layer nanofiber wound dressing with unidirectional exudate drainage function, excess exudate can be drained from the wound in one direction, keeping the wound relatively dry and accelerating wound healing. At the same time, this micro-pump dressing can drain excess biological fluid from the hydrophobic side to the hydrophilic side, thereby preventing biological fluid from wetting the wound. It can be processed and prepared using low-cost, readily available hydrophobic and hydrophilic materials, and the manufacturing process is relatively simple. It is a new type of wound dressing with high industrialization value. The heating layer 11 heats up, thereby accelerating blood circulation at the wound site and improving the wound healing speed. The thermal conductivity of the fine copper wire 14 can make the heat distribution of the heating layer 11 more uniform, and the fine copper wire 14 can also play a shaping role, preventing the two ends of the breathable patch 1 from curling up during use and causing the dressing to fall off. When it is necessary to remove the dressing, pull up the upper lifting strap 2 above the breathable patch 1. With the cooperation of the upper lifting strap 2 and the cotton pad 5, the dressing can be easily removed.

[0030] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A wound dressing with a micro-pump, comprising a breathable dressing (1), a first dustproof film (3), a second dustproof film (4), and a breathable layer (6); characterized in that: It also includes an outer hydrophobic layer (7), a hydrophilic interlayer (8), an outer hydrophilic layer (9), a heating layer (11), and an outer film (12). The lower end of the breathable tape (1) is provided with a dustproof film one (3) and a dustproof film two (4). The lower end of the breathable tape (1) is fixedly connected to a breathable layer (6). The breathable layer (6) is provided with an outer hydrophobic layer (7). The upper end of the outer hydrophobic layer (7) is provided with an outer hydrophilic layer (9). A hydrophilic interlayer (8) is provided between the outer hydrophobic layer (7) and the outer hydrophilic layer (9). The upper end of the breathable tape (1) is provided with a heating layer (11). An outer film (12) is provided on the heating layer (11). The outer hydrophobic layer (7), the hydrophilic interlayer (8), and the outer hydrophilic layer (9) together constitute a micro pump structure for conveying exudates to the outside. The heating layer (11) and the outer film (12) constitute a heating mechanism for promoting blood flow.

2. The wound dressing with a micropump according to claim 1, characterized in that: The outer hydrophobic layer (7) is the innermost layer and comes into contact with the wound surface. The outer hydrophobic layer (7) has pores evenly distributed on it, which allow exudate to pass through.

3. The wound dressing with a micropump according to claim 2, characterized in that: The hydrophilic interlayer (8) is a multi-layer structure. The hydrophilic interlayer (8) serves as a drainage layer for absorbing and pumping exudates.

4. The wound dressing with a micropump according to claim 3, characterized in that: The outer hydrophilic layer (9) is the outermost layer that comes into contact with the air. The outer hydrophilic layer (9) has a rich array of micropores that are interwoven. The outer hydrophilic layer (9) is used to isolate external bacteria.

5. The wound dressing with a micropump according to claim 4, characterized in that: The upper end of the breathable tape (1) is fixedly connected to the liquid storage layer (10), and the lower end of the liquid storage layer (10) is in contact with the upper end of the outer hydrophilic layer (9). The liquid storage layer (10) is used to absorb and store the exudate in the outer hydrophilic layer (9).

6. The wound dressing with a micropump according to claim 5, characterized in that: The upper end of the breathable tape (1) is fixedly connected to the lifting strap (2), and the two lifting straps (2) are symmetrically arranged. The lower end of the breathable tape (1) is fixedly connected to the cotton pad (5).

7. The wound dressing with a micropump according to claim 6, characterized in that: The end of the outer film (12) is fixedly connected to a side lifting strap (13), which has an opening for inserting a fingernail. Fine copper wires (14) are evenly distributed inside the breathable tape (1), which are used for heat conduction and shaping of the breathable tape (1).

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