Wound dressing and wound negative pressure treatment system
By designing the incisions on the absorbent layer, combined with the improvement of the transport layer and sealing layer, the problem of poor ductility of existing dressings is solved, the adaptability and sealing to the moving parts are improved, and wound healing is promoted.
Patent Information
- Application Number
- CN202421428010.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-20
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-06-20
AI Technical Summary
The existing wound dressings have poor ductility and are difficult to adapt to moving parts such as the knee joints, which can easily lead to air leakage and affect wound healing.
A plurality of cutouts running in the first direction are made on the absorbent layer, and the design of the transport layer, absorbent layer and sealing layer are combined to improve the ductility and sealing properties of the dressing.
It enhances the adaptability of the dressing to moving parts such as the knee joint, reduces the air leakage rate, and promotes the healing of the wound.
Smart Images
Figure CN223143680U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of medical devices, and particularly relates to a wound dressing and a wound negative pressure treatment system. Background Art
[0002] The wound dressing uses a physical adsorption method to suck out the blood and tissue fluid exuded from the wound, so as to keep the wound dry. The existing wound dressing has poor ductility and low adaptability to movable parts such as the knee joint, which easily causes air leakage of the wound dressing, thus being not conducive to wound healing. Content of the Utility Model
[0003] In view of the above defects or deficiencies in the prior art, it is desirable to provide a wound dressing and a wound negative pressure treatment system.
[0004] In the first aspect of the present utility model, there is provided a wound dressing, comprising: a transmission layer, an absorption layer and a sealing layer arranged in sequence along a first direction; wherein,
[0005] The transmission layer is used for transmitting liquids and gases;
[0006] The absorption layer is used for absorbing the liquids transmitted by the transmission layer, and a plurality of incisions penetrating along the first direction are formed on the absorption layer;
[0007] The sealing layer is used for sealing gases and permeating water vapor.
[0008] According to the wound dressing provided by the present utility model, by forming a plurality of incisions penetrating along the first direction on the absorption layer by die-cutting, the ductility of the wound dressing can be increased, the adaptability of the wound dressing to special parts such as the knee joint and the elbow joint can be improved, and at the same time, the air leakage rate of the wound dressing can be reduced.
[0009] In addition, the wound dressing of the present utility model may further have the following additional technical features:
[0010] Preferably, a plurality of the incisions are distributed on the absorption layer along a second direction or / and a third direction, the second direction intersects with the third direction and is in the same plane, and the first direction is perpendicular to the plane where the second direction and the third direction intersect.
[0011] Preferably, the incision includes a plurality of linear incisions distributed circumferentially, and the endpoints of the plurality of linear incisions are connected.
[0012] Preferably, the plurality of linear incisions are circumferentially and evenly distributed.
[0013] Preferably, the extension lengths of the plurality of linear incisions are the same.
[0014] Preferably, the incision includes three linear incisions evenly distributed circumferentially.
[0015] Preferably, the incision includes a square incision or an arc incision.
[0016] Preferably, the projection of the transmission layer in the first direction is located inside the projection of the absorption layer in the first direction.
[0017] Preferably, the wound dressing further includes a contact layer disposed on the side of the transmission layer away from the absorption layer, and the contact layer contacts the skin at the wound site.
[0018] In a second aspect of the present invention, there is provided a wound negative pressure treatment system, including: a negative pressure adsorption assembly and the wound dressing according to any embodiment of the present application, and the negative pressure adsorption assembly is used to suck out the gas in the wound dressing to generate negative pressure in the wound dressing.
[0019] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. Description of the Drawings
[0020] By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, objects, and advantages of the present application will become more apparent:
[0021] Figure 1 It is an exemplary structural diagram of the wound dressing provided by the embodiment of the present application;
[0022] Figure 2 is Figure 1 an exemplary structural diagram of the absorption layer in;
[0023] Figure 3 It is an exemplary structural diagram of the wound negative pressure treatment system provided by the embodiment of the present application;
[0024] In the above figures: 100 is the wound dressing; 110 is the transmission layer; 120 is the absorption layer; 121 is the incision; 1210 is the linear incision; 130 is the sealing layer; 140 is the contact layer; 150 is the adhesive layer;
[0025] 200 is the wound negative pressure treatment system; 210 is the negative pressure adsorption assembly; 211 is the Luer connector; 212 is the drainage tube; 213 is the suction cup. Detailed Embodiments
[0026] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the relevant utility model and do not limit the utility model. Additionally, it should be noted that for ease of description, only the parts related to the utility model are shown in the drawings.
[0027] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and embodiments.
[0028] The terms used in the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The singular forms "a", "the", and "said" used in the present application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any and all possible combinations of one or more of the associated listed items.
[0029] Unless the context otherwise requires, throughout the specification and claims, the term "comprising" is interpreted in an open, inclusive sense, i.e., "including, but not limited to".
[0030] In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "examples", "specific examples", or "some examples", etc. are intended to indicate that specific features, structures, materials, or characteristics related to the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representations of the above terms do not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials, or characteristics may be included in any one or more embodiments or examples in any appropriate manner.
[0031] The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present disclosure, unless otherwise stated, the meaning of "a plurality" is two or more.
[0032] In the first aspect of the present utility model, referring to Figure 1 and Figure 2 , a wound dressing 100 is provided, including: a transmission layer 110, an absorption layer 120, and a sealing layer 130 arranged in sequence along a first direction; wherein,
[0033] The transmission layer 110 is used for transmitting liquids and gases;
[0034] The absorption layer 120 is used to absorb the liquid transmitted by the transmission layer 110, and a plurality of incisions 121 penetrating along the first direction are formed in the absorption layer 120;
[0035] The sealing layer 130 is used to seal gas and allow water vapor to pass through.
[0036] Specifically, the transmission layer 110, the absorption layer 120, and the sealing layer 130 are stacked in sequence along the first direction. Among them, the transmission layer 110 is made of a porous material. The transmission layer 110 allows gas and liquid to be transmitted out of the wound site and enter the absorption layer 120 of the wound dressing 100, and can support the absorption layer 120 to ensure uniform stress on the wound under negative pressure. The material of the transmission layer 110 can be open-cell foam, knitted or woven spacer fabric or non-woven fabric, nylon, etc. The thickness of the transmission layer 110 is 2-3 mm. Exemplarily, it can be 2 mm, 2.4 mm, 2.6 mm, 2.8 mm, 3 mm, or a range composed of any of the above values.
[0037] The absorption layer 120 is used to absorb the liquid transmitted by the transmission layer 110, such as storing the exudate removed from the wound site, preventing the exudate from sloshing in the wound dressing 100, and can ensure that the wound site is in a dry state, which helps the wound to recover. The material of the absorption layer 120 is selected as a material with good liquid absorption performance, such as it can be foam, non-woven natural or synthetic material, or superabsorbent material. Exemplarily, the material of the absorption layer 120 is absorbent cotton, etc. The thickness of the absorption layer 120 is 3-5 mm. Exemplarily, it can be 3 mm, 3.2 mm, 3.5 mm, 3.7 mm, 4 mm, 4.4 mm, 4.6 mm, 4.8 mm, 5 mm, etc., or a range composed of any of the above values.
[0038] The sealing layer 130 can permeate water vapor but not gas. The sealing layer 130 can cover the wound and form a sealed cavity between the wound dressing 100 and the wound position. This chamber can establish negative pressure to treat the wound by negative pressure wound therapy. The covering layer can be fixed to the skin of the wound site with an adhesive such as a medical surgical film, etc. at the boundary area around the periphery of the wound dressing 100 to ensure the tightness of the formed sealed cavity, protect the wound from external contamination, and allow the liquid absorbed by the absorption layer 120 to be transmitted to the sealing layer 130 and evaporate from the outer surface of the sealing layer 130. The material of the sealing layer 130 can be polyurethane film (PU). The thickness of the sealing layer 130 is 0.1-0.3 mm. Exemplarily, it can be 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, etc., or a range composed of any of the above values.
[0039] According to the wound dressing 100 provided by the present utility model, a plurality of incisions 121 penetrating along the first direction are formed on the absorption layer 120 by die-cutting, which can increase the ductility of the wound dressing 100, improve the adaptability of the wound dressing 100 to movable parts such as the knee joint and the elbow joint, and at the same time reduce the air leakage rate of the wound dressing 100.
[0040] In some embodiments, as Figure 2 shown, a plurality of the incisions 121 are distributed on the absorption layer 120 along the second direction or / and the third direction. The second direction intersects with the third direction and is in the same plane, and the first direction is perpendicular to the plane where the second direction and the third direction intersect.
[0041] Specifically, the first direction, the second direction, and the third direction respectively correspond to the z direction, the x direction, and the y direction in a three-dimensional coordinate system, that is, the z direction is perpendicular to the plane where the x direction and the y direction intersect (i.e., the xy plane). A plurality of incisions 121 can be distributed on the absorption layer 120 along the x direction to improve the ductility of the absorption layer 120 along the x direction; or, a plurality of incisions 121 can be distributed on the absorption layer 120 along the y direction to improve the ductility of the absorption layer 120 along the y direction; or a combination of the above two methods is adopted, and a plurality of incisions 121 are distributed on the absorption layer 120 along the x direction and the y direction to improve the ductility of the absorption layer 120 in the x direction and the y direction. It should be noted that the above distribution can be equally spaced or non-equally spaced, and an equally spaced distribution is preferably adopted to enable uniform stress on each position of the absorption layer 120.
[0042] In some embodiments, as Figure 2 shown, the incision 121 includes a plurality of linear incisions 1210 distributed circumferentially, and the endpoints of the plurality of linear incisions 1210 are connected.
[0043] Specifically, the incision 121 includes a plurality of linear incisions 1210. The plurality of linear incisions 1210 penetrate the absorption layer 120 along the first direction, and the plurality of linear incisions 1210 are circumferentially distributed in the plane where the x direction and the y direction intersect, and one end of the plurality of linear incisions 1210 is connected. The ductility of the absorption layer 120 can be improved by the circumferentially distributed plurality of linear incisions 1210, thereby reducing the air leakage rate of the wound dressing 100.
[0044] It can be understood that the number of the linear incisions 1210 included in the incision 121 can be 3, 4, 6, etc., and those skilled in the art can set it according to actual needs. Preferably, 3 linear incisions are adopted to form a Y-shaped incision (as Figure 2 shown). The Y-shaped incision can significantly improve the ductility of the wound dressing 100, improve the adaptability of the wound dressing 100 to different wound sites, and at the same time reduce the air leakage rate of the wound dressing 100.
[0045] In some embodiments, as Figure 2 shown, a plurality of the linear incisions 1210 are circumferentially and uniformly distributed.
[0046] Specifically, the plurality of linear incisions 1210 are circumferentially and uniformly distributed or non-uniformly distributed, and preferably uniformly distributed, that is, the included angle between any two adjacent linear incisions 1210 in the circumferential distribution is the same, so as to ensure that the absorbent layer 120 has better ductility in all directions on the xy plane.
[0047] In some embodiments, as Figure 2 shown, the extension lengths of the plurality of the linear incisions 1210 are the same.
[0048] Specifically, the extension lengths of the plurality of linear incisions 1210 in the circumferential distribution are the same, further improving the ductility of the absorbent layer 120 in all directions on the xy plane. Among them, the extension direction of one incision 121 in the plurality of linear incisions 1210 in the circumferential distribution is parallel to the second direction or the third direction, so that the absorbent layer 120 has better ductility in the second direction and the third direction. Exemplarily, if the incision 121 includes three linear incisions 1210 that are circumferentially and uniformly distributed, and one of the linear incisions 1210 is parallel to the second direction, and the other two linear incisions 1210 intersect with the third direction, then the overall ductility of the wound dressing 100 in the second direction and the third direction can be improved, effectively improving the adaptability of special parts, and at the same time reducing the air leakage rate of the dressing.
[0049] In some embodiments, as Figure 2 shown, the incision 121 includes three linear incisions 1210 that are circumferentially and uniformly distributed.
[0050] Specifically, the extension lengths of the three linear incisions 1210 that are circumferentially and uniformly distributed are the same, and one of the incisions 121 is parallel to the second direction or the third direction. Using the three linear incisions 1210 to form a Y-shaped incision can improve the ductility of the absorbent layer 120 in the second direction and the third direction, and further improve the ductility of the wound dressing 100 in the circumferential direction. When the wound dressing 100 is applied to a wound on the body surface that may move, the wound dressing 100 can effectively adapt to the movement with a certain stretching amount, thus ensuring the comfort and adaptability of the wound dressing 100.
[0051] In some embodiments, the incision 121 includes a square incision or an arc incision.
[0052] Specifically, the incision 121 can also adopt various forms such as a square incision or an arc incision. Preferably, the above-mentioned Y-shaped incision is adopted. The ductility of the Y-shaped incision is 2 to 3 times that of the square incision. The arc incision has better ductility in the length direction of the arc incision and poorer ductility in the width direction, that is, the overall ductility of the arc incision is inferior to that of the Y-shaped incision.
[0053] In some embodiments, as Figure 1 shown, the projection of the transmission layer 110 in the first direction is located inside the projection of the absorption layer 120 in the first direction.
[0054] Specifically, the projection of the transmission layer 110 in the first direction is located inside the projection of the absorption layer 120 in the first direction, that is, the cross-sectional area of the absorption layer 120 in the xy direction is larger than the cross-sectional area of the corresponding outgoing layer, so that the four peripheral edges of the absorption layer 120 can completely cover the transmission layer 110, avoiding the accumulation of wound exudate on the transmission layer 110 at the edge of the wound dressing 100. At the same time, it can avoid that the protruding hard network of the transmission layer 110 may pierce the sealing layer 130, thus ensuring the sealing performance of the wound dressing 100 during use.
[0055] In some embodiments, as Figure 1 shown, the wound dressing 100 further includes a contact layer 140. The contact layer 140 is disposed on the side of the transmission layer 110 away from the absorption layer 120, and the contact layer 140 is in contact with the skin of the wound site.
[0056] Specifically, the contact layer 140 can be a polyurethane layer, a polyethylene layer or other flexible layers, and is perforated or otherwise made permeable to liquids and gases by means of a hot needle process, a laser ablation process, an ultrasonic process, etc. A plurality of through holes penetrating in the first direction are formed in the contact layer 140. The through holes can allow liquids to pass through, but can prevent wound tissues from growing into the transmission layer 110 and the absorption layer 120 of the wound dressing 100. The thickness of the contact layer 140 is 0.2 to 0.7 mm. Exemplarily, it is 0.2 mm, 0.3 mm, 0.45 mm, 0.5 mm, 0.6 mm, 0.7 mm, or a range composed of any of the above values.
[0057] On the side of the contact layer 140 away from the transmission layer 110, an adhesive layer 150 can be provided. The adhesive layer 150 can use adhesives such as silicone, hot-melt hydrocolloid, acrylic-based adhesives, and polypropylene, so that the wound dressing 100 can adhere to the skin around the wound site. An adhesive layer 150 can also be provided on the side of the contact layer 140 close to the transmission layer 110 to facilitate the adhesion of the contact layer 140 and the transmission layer 110. Among them, the thickness of the adhesive layer 150 is 0.1-0.3 mm. Exemplarily, it can be 0.1 mm, 0.15 mm, 0.2 mm, 0.3 mm, or a range composed of any of the above values.
[0058] It should be noted that a release paper can be provided on the adhesive layer 150 on the side of the contact layer 140 away from the transmission layer 110, which can isolate sticky objects, avoid contamination of the wound dressing 100 when not in use, and facilitate the preservation of the wound dressing 100.
[0059] In the second aspect of the present utility model, as Figure 3 shown, a wound negative pressure treatment system is provided, including: a negative pressure adsorption component 210 and the wound dressing 100 according to any embodiment of the present application. The negative pressure adsorption component 210 is used to suck out the gas in the wound dressing 100 to generate negative pressure in the wound dressing 100.
[0060] Specifically, the negative pressure adsorption component 210 is communicated with the sealing layer 130 of the wound dressing 100. The negative pressure adsorption component 210 is used to form negative pressure between the wound dressing 100 and the surrounding skin of the wound to perform negative pressure wound treatment on the wound site. Negative pressure wound treatment helps reduce pain and heal difficult-to-heal wounds by reducing tissue edema, promoting blood flow and the formation of granulation tissue, and removing excessive exudate, and can reduce bacterial growth, thereby reducing the risk of infection. This treatment makes the wound less affected by external interference, resulting in faster healing.
[0061] In some embodiments, as Figure 3 shown, the negative pressure adsorption component 210 includes a negative pressure pump, a drainage tube 212, and a suction cup 213. Among them, the negative pressure pump is communicated with the suction cup 213 through the drainage tube 212. The suction cup 213 is arranged on the side of the sealing layer 130 away from the absorption layer 120, and the suction cup 213 is communicated with the wound dressing 100 through the drainage tube 212.
[0062] Specifically, the negative pressure pump can be a vacuum pump. The output end of the vacuum pump is connected to one end of the drainage tube 212 through a Luer connector 211. The other end of the drainage tube 212 is connected to the suction cup 213. The suction cup 213 is fixed on the outer surface of the sealing layer 130. The drainage tube 212 passes through the suction cup 213 and is connected to the absorption layer 120 and the transmission layer 110. When the contact layer 140 of the wound dressing 100 adheres to the skin around the wound, a sealed cavity is formed between the wound dressing 100 and the skin around the wound. The vacuum pump starts to work, sucking out the gas in the sealed cavity, creating a negative pressure environment in the sealed cavity, extracting wound pus and infectious substances, attracting healthy tissue fluid to maintain a moist treatment environment, and promoting blood microcirculation in the surrounding area to achieve the effect of accelerating wound healing. Negative pressure wound treatment utilizes the body's natural healing process, which can effectively promote blood flow to the wound area, stimulate the formation of granulation tissue above the wound and the migration of healthy tissues.
[0063] The wound dressing 100 provided by the embodiment of the present application is a disposable quick-pasting type closed wound dressing, mainly applied to acute and chronic wounds with less exudate. It is used in conjunction with the negative pressure adsorption component 210 for continuous negative pressure closed drainage of the wound surface. The structure of the wound dressing 100 is simple, which can avoid the accumulation of exudate at the edge of the transmission layer 110 and the hard net protruding from the transmission layer 110 puncturing the sealing layer 130, reducing the leakage risk of the wound dressing 100. At the same time, it can effectively increase the overall ductility of the wound dressing 100 and improve the adaptability to different wound sites.
[0064] The above description is only the preferred embodiment of the present application and an explanation of the applied technical principle. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solution formed by the specific combination of the above technical features, but also should cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by mutually replacing the above features with the (but not limited to) technical features with similar functions disclosed in the present application.
Claims
1. A wound dressing (100), characterized in that, Comprising: A transport layer (110), an absorption layer (120), and a sealing layer (130) arranged in sequence along a first direction; wherein, The transport layer (110) is used for transporting liquids and gases; The absorption layer (120) is used for absorbing the liquid transported by the transport layer (110), and a plurality of incisions (121) penetrating along the first direction are formed on the absorption layer (120); The sealing layer (130) is used for sealing gases and permeating water vapor.
2. The wound dressing (100) according to claim 1, wherein, A plurality of the incisions (121) are distributed on the absorption layer (120) along a second direction or / and a third direction, the second direction intersects with the third direction and is in the same plane, and the first direction is perpendicular to the plane where the second direction and the third direction intersect.
3. The wound dressing (100) according to claim 1 or 2, characterized in that, The incision (121) includes a plurality of linear incisions (1210) distributed circumferentially, and the endpoints of the plurality of linear incisions (1210) are connected.
4. The wound dressing (100) according to claim 3, characterized in that, The plurality of linear incisions (1210) are evenly distributed circumferentially.
5. The wound dressing (100) according to claim 4, characterized in that, The plurality of linear incisions (1210) have the same extension length.
6. The wound dressing (100) according to claim 5, characterized in that, The incision (121) includes three linear incisions (1210) evenly distributed circumferentially.
7. The wound dressing (100) according to claim 1 or 2, characterized in that, The incision (121) includes a square incision or an arc incision.
8. The wound dressing (100) according to claim 1, characterized in that, The projection of the transport layer (110) in the first direction is located inside the projection of the absorption layer (120) in the first direction.
9. The wound dressing (100) according to claim 1, characterized in that, The wound dressing (100) further includes a contact layer (140), the contact layer (140) is arranged on the side of the transport layer (110) away from the absorption layer (120), and the contact layer (140) is in contact with the skin of the wound site.
10. A wound negative pressure treatment system (200), characterized in that, Comprising: A negative pressure adsorption assembly (210) and the wound dressing (100) according to any one of claims 1-9, the negative pressure adsorption assembly (210) is used for sucking out the gas in the wound dressing (100) to generate negative pressure in the wound dressing (100).