Negative pressure wound therapy device with hollow air fiber pad

Abstract

The utility model relates to a kind of negative pressure drainage devices with hollow air fiber pad, including fiber pad, film and suction pipe;The fiber pad is used to cover on wound surface;The film covers on the fiber pad, and the periphery of the film is used to connect the skin near the wound surface, the fiber pad is compressed between the film and the wound surface;Suction hole is provided on the film, one end of the suction pipe is connected with the suction hole, and the other end is connected with negative pressure source;The fiber pad is composed of several hollow fiber filaments;The utility model replaces the commonly used negative pressure drainage material by using hollow air fiber pad, and it has good permeability, good supportability, is convenient for cutting, and will not appear chipping condition.

Description

Technical Field

[0001] This utility model relates to the technical field of medical devices, specifically to a negative pressure drainage device with a hollow air fiber pad. Background Technology

[0002] Negative pressure wound therapy (NPWT) is an advanced technique for treating infected wounds or surgical incisions, and it holds significant importance in the field of medical devices. Its working principle involves covering or filling the wound with a porous foam dressing to remove skin or soft tissue defects, then sealing the wound with a medical transparent film to create a closed space. A drainage tube is then connected to this closed space, and finally, a negative pressure source is connected to the drainage tube. This controlled negative pressure promotes wound healing, making it a novel treatment method.

[0003] Currently, porous foams used for negative pressure wound therapy are mainly divided into two types: PVA foam and PU foam. PVA foam has excellent water absorption properties, effectively absorbing and retaining exudate around the wound, helping to keep the wound dry. PVA foam is soft and elastic, not easily broken or shattered, making it suitable for irregularly shaped wounds. PVA foam has good biocompatibility and is unlikely to cause allergic reactions or other adverse reactions. However, PVA foam also has disadvantages: it hardens after drying, and its production is highly polluting and energy-intensive. PU foam has excellent permeability and is not easily blocked during drainage. PU foam is easy to process and can be made into various shapes. However, PU also has disadvantages: it is hydrophobic and has poor exudate absorption. When used on wounds for a long time, new granulation tissue can grow into the PU foam, causing secondary damage to the wound during removal. PU also has low mechanical properties and is prone to shedding, making it unsuitable for use in cavities. Utility Model Content

[0004] Based on the above description, this utility model provides a negative pressure drainage device with a hollow air fiber pad. By using a hollow air fiber pad instead of the commonly used negative pressure drainage material, it has good permeability, good support, is easy to cut, and will not produce lint.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A negative pressure drainage device with a hollow air fiber pad includes a fiber pad, a film, and a suction tube; the fiber pad is used to cover the wound surface; the film covers the fiber pad, and the periphery of the film is used to connect the skin near the wound surface, pressing the fiber pad tightly between the film and the wound surface; the film is provided with suction holes, one end of the suction tube is connected to the suction holes, and the other end is connected to a negative pressure source; the fiber pad is composed of a plurality of hollow fiber filaments.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, the fiber pad has a contact layer on the side opposite to the wound surface, the contact layer being used to achieve smooth contact with the wound surface.

[0008] Furthermore, the fiber pad also includes a flow guiding layer and a porous layer. The flow guiding layer is disposed on the side of the fiber pad away from the contact layer, and the porous layer is disposed between the flow guiding layer and the contact layer. The fiber pad is used to draw the permeate in the porous layer to the flow guiding layer through the hollow tubes in the hollow fiber filaments.

[0009] Furthermore, one end of each hollow fiber extends from within the fiber pad toward the side away from the wound surface to form the drainage layer.

[0010] Furthermore, one end of each hollow fiber is randomly embedded in the middle of the fiber pad to form the porous layer.

[0011] Furthermore, the side of the fiber pad closest to the wound surface does not contain the ends of the hollow fiber filaments, thereby forming the contact layer.

[0012] Furthermore, the fiber mat is formed by extruding POE material in water.

[0013] Furthermore, the film is a medical transparent film.

[0014] Furthermore, a suction cup is provided at one end of the suction tube, and the suction cup is detachably attached to the film, so that the suction tube is connected to the suction hole.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0016] 1. This utility model uses hollow air fiber pads instead of commonly used negative pressure drainage materials, which have good permeability, good support, are easy to cut, and will not cause lint.

[0017] 2. The air fiber of this invention is integrally molded in water from POE (polyolefin elastomer) material, without glue, and is safe and non-toxic. The production process is environmentally friendly.

[0018] 3. By dividing the fiber pad into a contact layer, a porous layer and a drainage layer arranged in sequence, the contact layer directly contacts the wound surface, providing high comfort. In addition, each fiber can also form a drainage path like a straw, drawing the exudate inside the fiber pad to the drainage layer through the hollow tubes inside the fiber filaments. This avoids the exudate accumulating in the pores caused by the large pores of the air fiber components, reducing the amount of residual exudate inside the fiber pad. Attached Figure Description

[0019] Figure 1 A schematic diagram of a negative pressure drainage device with a hollow air fiber pad provided for an embodiment of this utility model;

[0020] Figure 2 for Figure 1 A schematic diagram of the hidden suction tube;

[0021] Figure 3 This is a schematic diagram of the installation method of the negative pressure drainage device in an embodiment of this utility model;

[0022] Figure 4 This is a schematic diagram of the fiber pad structure in an embodiment of the present invention;

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1. Fiber pad; 11. Contact layer; 12. Porous layer; 13. Flow guiding layer; 14. End of hollow fiber filament; 2. Film; 21. Suction hole; 3. Suction tube; 31. Suction cup; 4. Negative pressure source. Detailed Implementation

[0025] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0027] It is understood that spatial relation terms such as “below,” “under,” “below,” “below,” “above,” “above,” etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as “below,” “below,” or “below” will be oriented “above” the other element or feature. Therefore, the exemplary terms “below” and “under” can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0028] A negative pressure drainage device with a hollow air fiber pad 1 includes a fiber pad 1, a membrane 2, and a suction tube 3. The fiber pad 1 is used to cover the wound surface. The membrane 2 covers the fiber pad 1, and the perimeter of the membrane 2 is used to connect to the skin near the wound surface, pressing the fiber pad 1 tightly between the membrane 2 and the wound surface. The membrane 2 is provided with suction holes 21, and one end of the suction tube 3 is connected to the suction holes 21, and the other end is connected to a negative pressure source 4. The fiber pad 1 is composed of several hollow fiber filaments.

[0029] The fiber mat 1 is made of an elastic polymer material. In this embodiment, the fiber mat 1 is integrally molded from POE (polyolefin elastomer) material in water, without glue, making it safe and non-toxic. The production process is environmentally friendly. In addition, the air fibers have good permeability, good support, are easy to cut, and will not shed fibers.

[0030] Preferably, the fiber pad 1 in this embodiment includes a contact layer 11, a porous layer 12, and a drainage layer 13. The contact layer 11 is disposed on the side of the fiber pad 1 opposite to the wound surface, the drainage layer 13 is disposed on the side of the fiber pad 1 away from the contact layer 11, and the porous layer 12 is disposed between the drainage layer 13 and the contact layer 11.

[0031] Specifically, one end of each hollow fiber filament extends from within the fiber pad 1 towards the side furthest from the wound surface, forming a drainage layer 13. The other end of each hollow fiber filament is randomly embedded in the middle of the fiber pad 1, forming a porous layer 12. Each fiber filament can also act like a straw, forming a drainage path to draw exudate from inside the fiber pad 1 through the hollow channels within the fiber filament to the drainage layer. This prevents exudate from accumulating in the pores due to the large porosity of the air fiber components, thus reducing residual exudate within the fiber pad 1.

[0032] The side of the fiber pad 1 facing the wound does not contain the hollow fiber ends 14, thus forming a contact layer 11 for smooth contact with the wound. The contact layer 11 has a high degree of flatness, so it is highly comfortable when in direct contact with the wound.

[0033] In addition, the film 2 in this embodiment is a medical transparent film, which allows observation of wound healing, ensures smooth irrigation, and prevents collapse and leakage. One end of the suction tube 3 is provided with a suction cup 31, which is detachably attached to the film 2, so that the suction tube 3 is connected to the suction hole 21.

[0034] The steps for installing the negative pressure drainage device of this embodiment are as follows:

[0035] (1) Cover the wound with fiber pad 1 so that the contact layer 11 directly contacts the wound.

[0036] (2) Cover the fiber pad 1 with the film 2, and firmly adhere the edges of the film 2 to the skin near the wound. Press the fiber pad 1 between the film 2 and the wound.

[0037] (3) Attach the suction cup 31 to the film 2 so that one end of the suction tube 3 is connected to the suction hole 21.

[0038] (4) The other end of the suction tube 3 is connected to the negative pressure source 4 for negative pressure suction.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A negative pressure drainage device with a hollow air fiber pad, characterized in that, The device includes a fiber pad, a dressing, and a suction tube; the fiber pad is used to cover the wound surface; the dressing covers the fiber pad, and the dressing is used to connect the skin near the wound surface around its perimeter, pressing the fiber pad between the dressing and the wound surface; the dressing has suction holes, one end of the suction tube is connected to the suction holes, and the other end is connected to a negative pressure source; the fiber pad is composed of several hollow fiber filaments.

2. The negative pressure drainage device with a hollow air fiber pad according to claim 1, characterized in that, The fiber pad has a contact layer on the side opposite to the wound surface, which is used to achieve smooth contact with the wound surface.

3. The negative pressure drainage device with a hollow air fiber pad according to claim 2, characterized in that, The fiber pad further includes a flow guiding layer and a porous layer. The flow guiding layer is disposed on the side of the fiber pad away from the contact layer, and the porous layer is disposed between the flow guiding layer and the contact layer. The fiber pad is used to draw the permeate in the porous layer to the flow guiding layer through the hollow tubes in the hollow fiber filaments.

4. A negative pressure drainage device with a hollow air fiber pad according to claim 3, characterized in that, One end of each hollow fiber extends from inside the fiber pad toward the side away from the wound surface to form the drainage layer.

5. A negative pressure drainage device with a hollow air fiber pad according to claim 3, characterized in that, One end of each hollow fiber is randomly embedded in the middle of the fiber pad to form the porous layer.

6. A negative pressure drainage device with a hollow air fiber pad according to claim 3, characterized in that, The side of the fiber pad opposite to the wound surface does not contain the ends of the hollow fiber filaments, thereby forming the contact layer.

7. A negative pressure drainage device with a hollow air fiber pad according to claim 1, characterized in that, The fiber pad is made of an elastic polymer material.

8. A negative pressure drainage device with a hollow air fiber pad according to claim 7, characterized in that, The fiber mat is formed by extruding POE material in water.

9. A negative pressure drainage device with a hollow air fiber pad according to claim 1, characterized in that, The film is a medical transparent film.

10. A negative pressure drainage device with a hollow air fiber pad according to claim 1, characterized in that, One end of the suction tube is provided with a suction cup, which is detachably attached to the film, so that the suction tube is connected to the suction hole.

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