CN117598859A

CN117598859A - Pressure-reducing dressing and application thereof

Info

Publication number: CN117598859A
Application number: CN202311682358.2A
Authority: CN
Inventors: 吴康平
Original assignee: Zhejiang Longtai Medical Technology Co ltd
Current assignee: Zhejiang Longtai Medical Technology Co ltd
Priority date: 2023-12-08
Filing date: 2023-12-08
Publication date: 2024-02-27

Abstract

The embodiment of the disclosure provides a decompression type dressing and application thereof, the decompression type dressing includes an adhesive contact layer, a foam layer and a back lining film layer which are sequentially stacked and arranged, and further includes an elastic decompression layer, wherein the elastic decompression layer is arranged between the adhesive contact layer and the back lining film layer in a layer-by-layer manner and is used for carrying out supporting surface decompression and buffer decompression on a skin contact surface. The elastic decompression layer is introduced into the decompression type dressing and is used in combination with the foam layer. The elastic pressure reducing layer has a supporting function, so that the elastic pressure reducing layer can be used as a supporting surface to obviously increase the stress area of the skin contact surface, the pressure value of the skin contact surface can be obviously reduced under the action of the same pressure, and meanwhile, the foam layer and the elastic pressure reducing layer have flexible buffering pressure reducing functions. Therefore, the dressing forms a flexible support for the skin contact layer, can achieve the aim of obviously reducing the occurrence of pressure injury, can be used as a pressure sore prevention dressing for preventing pressure injury, and can be used as a wound dressing for wound surface treatment.

Description

Pressure-reducing dressing and application thereof

Technical Field

Embodiments of the present disclosure relate to the technical field of dressings, and in particular, to a reduced pressure dressing and applications thereof.

Background

The dressing is an auxiliary material used outside the main material of the article. Existing dressing is often referred to as wound dressing, traditional wound dressing is mainly dry gauze, and novel wound dressing includes hydrocolloid dressing, foam dressing, silica gel foam dressing, hydrogel dressing, alginate dressing, hydrophilic fiber dressing and the like. The silica gel foam dressing is mainly used for nursing chronic wounds such as bedsores, pressure sores and the like. The silicone gel foam dressing is of a multi-layer structure and is generally of a three-layer or more than three-layer structure, in the three-layer structure, a wound surface is taken as an inner layer, the silicone gel foam dressing comprises a silicone gel layer, a foam layer and a film layer which are sequentially laminated from inside to outside, the silicone gel layer is a soft silicone wound contact layer, the layer is gently adhered to the skin around the wound, but does not adhere to the wound surface, and tearing of new granulation tissues can be reduced when the dressing is changed; the foam layer is an elastic foam absorption layer which has good seepage management capability, is flexible and is tightly attached to the skin; the film layer is a breathable waterproof outer coating film, and can isolate viruses and bacteria and prevent infection from outside to inside.

However, the existing novel wound dressing is mainly used after the occurrence of wounds such as bedsores, pressure sores and the like, is used for wound surface treatment, and is not used before the occurrence of wounds such as bedsores, pressure sores and the like so as to prevent pressure injury. The main reason for actually causing pressure sores is that local tissues are subjected to continuous vertical pressure, particularly at the raised position of bones of the body, but the existing wound dressing emphasizes the functions of wound surface seepage management, creation of a wet healing environment, painless replacement and the like, is only auxiliary to the prevention of pressure injury, and cannot effectively prevent pressure sores and other pressure injuries. Therefore, the prior art lacks of dressing products special for preventing pressure injury, and can not meet the requirements of special patients such as bedridden patients or old people in clinic and families for preventing pressure sores.

Disclosure of Invention

Embodiments described herein provide a reduced pressure dressing and uses thereof.

According to a first aspect of the present disclosure, a reduced pressure dressing is provided. In this dressing, including viscose contact layer, foam layer and the back lining rete that stacks in proper order and arrange, still include the elasticity decompression layer, the elasticity decompression layer set up in between viscose contact layer and the back lining rete for carry out holding surface decompression and buffering decompression to skin contact surface.

In some embodiments of the present disclosure, the elastic pressure relief layer is disposed at least on a side proximate to the backing film layer.

In some embodiments of the present disclosure, the material of the elastic pressure-reducing layer is an elastomer in a three-dimensional mesh structure.

In some embodiments of the present disclosure, the material of the elastic pressure relief layer is a sandwich mesh.

In some embodiments of the present disclosure, the sandwich mesh of the elastic pressure reduction layer includes a mesh facing layer, an elastic structure layer, and a mesh bottom layer, the elastic structure layer being located between and connecting the mesh facing layer and the mesh bottom layer.

In some embodiments of the present disclosure, the elastic pressure relief layer has a thickness of 1mm to 10mm, preferably 2mm to 4mm.

In some embodiments of the present disclosure, the foam layer is a polyurethane foam layer.

In some embodiments of the present disclosure, the foam layer has a thickness of 1mm to 10mm, preferably 2mm to 5mm.

In some embodiments of the present disclosure, the adhesive contact layer is a silicone gel layer or a medical pressure sensitive adhesive, and other adhesive materials may be used.

In some embodiments of the present disclosure, the reduced pressure dressing further comprises a water-blocking layer disposed in a stack on a side of the foam layer remote from the adhesive contact layer.

In some embodiments of the present disclosure, the water-blocking layer is a SAF (superabsorbent fiber) layer, and other known water-blocking materials may be used.

In some embodiments of the present disclosure, the reduced pressure dressing further comprises a unidirectional flow guiding layer arranged layer by layer between the foam layer and the water blocking layer.

In some embodiments of the present disclosure, the unidirectional flow guide layer is a nonwoven layer.

In some embodiments of the present disclosure, the dressing is entirely sheet-shaped.

In some embodiments of the present disclosure, the dressing has a shape selected from any one of square, rectangle, circle, heart, melon seed, concave, Y.

According to a second aspect of the present disclosure there is provided the use of a reduced pressure dressing for the prevention of pressure injury and/or wound treatment;

in some embodiments of the present disclosure, the reduced pressure dressing may be used to prevent compressive injuries at the sacral tail, ankle, ischias, elbow, knee of a human.

A reduced pressure dressing of the present disclosure incorporates an elastic reduced pressure layer in the dressing for use in combination with a foam layer. On one hand, the elastic decompression layer has a supporting function, so that the elastic decompression layer can be used as a supporting surface to obviously increase the stress area of the skin contact surface, and the pressure value of the skin contact surface can be obviously reduced under the action of the same pressure; on the other hand, the elastic decompression layer has a certain buffering decompression effect, and meanwhile, the foam layer with higher elasticity has a better buffering decompression effect, so that the buffering decompression effect of the elastic decompression layer is enhanced. Therefore, the reduced pressure dressing forms flexible support on the skin contact surface under the cooperation of the reduced pressure of the support surface and the buffer reduced pressure, can achieve the aim of obviously reducing the occurrence of pressure injury, can be specially used as a dressing for preventing the pressure injury, and fills the application blank of products for preventing the pressure injury at home and abroad. Meanwhile, the foam layer in the dressing has the seepage management function, so that the reduced-pressure dressing can be used for wound treatment.

The elastic pressure reducing layer is arranged at least near one side of the back lining film layer, so that the elastic pressure reducing layer in the dressing is positioned at the most direct stress surface, and the pressure reducing effect is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following brief description of the drawings of the embodiments will be given, it being understood that the drawings described below relate only to some embodiments of the present disclosure, not to limitations of the present disclosure, in which:

FIG. 1 is a schematic illustration of the construction of a reduced pressure dressing provided by embodiments of the present disclosure;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a schematic illustration of the structure of another reduced pressure dressing provided by embodiments of the present disclosure;

FIG. 4 is a bar graph of pressure values for different casting products of the same gauge at the same pressure;

FIG. 5 is a schematic illustration of the structure of another reduced pressure dressing provided by embodiments of the present disclosure; and

fig. 6 is a schematic structural view of another reduced pressure dressing provided by embodiments of the present disclosure.

The adhesive comprises a 101-adhesive contact layer, a 102-foam layer, a 103-elastic pressure reduction layer, a 1031-mesh surface layer, a 1032 elastic structure layer, a 1033-mesh bottom layer, a 104-unidirectional flow guide layer, a 105-water locking layer and a 106-backing film layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings. It will be apparent that the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments, which can be made by those skilled in the art based on the described embodiments of the present disclosure without the need for creative efforts, are also within the scope of the protection of the present disclosure.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the presently disclosed subject matter belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the specification and relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein. As used herein, a statement that two or more parts are "connected" or "coupled" together shall mean that the parts are joined together either directly or joined through one or more intermediate parts.

Example 1

As shown in fig. 1 and 2, the reduced-pressure dressing provided in the embodiments of the present disclosure uses the surface near the skin as an inner layer, and includes an adhesive contact layer 101, a foam layer 102, an elastic reduced-pressure layer 103, and a backing film layer 106 that are sequentially stacked from inside to outside. Wherein the foam layer 102 is used for cushion decompression of the skin contact surface, and the elastic decompression layer 103 is used for support surface decompression and cushion decompression of the skin contact surface.

In the embodiment of the disclosure, the elastic decompression layer 103 is a sandwich mesh cloth layer with a three-dimensional mesh structure. The sandwich web of the elastic pressure reduction layer 103 includes a web facing layer 1031, a web bottom layer 1033, and an elastic structure layer 1032 disposed therebetween and connecting the two. In a specific embodiment, the elastic structure layer 1032 is an elastic tie layer.

The thickness of the elastic decompression layer 103 is 2mm, and the thickness of the elastic decompression layer 103 can be adjusted by adjusting the length of the elastic connecting wires or the density of the elastic connecting wire materials of the sandwich mesh cloth according to the decompression effect.

In the embodiment of the disclosure, the foam layer 102 is a polyurethane foam layer with a thickness of 3mm and has a seepage control function.

In the disclosed embodiment, the adhesive contact layer 101 is a porous silicone gel layer, is a soft silicone skin/wound contact layer, and can be gently adhered to the skin surface before the wound does not occur; after the wound, the wound-surrounding skin can be gently adhered, the wound surface is not adhered, and the risk of secondary injury of the wound surface can be reduced.

In the embodiment of the disclosure, the backing film layer 106 is a polyurethane film layer, and has the functions of water resistance, ventilation, bacteria isolation and the like.

Because the foam layer 102 and the elastic pressure-reducing layer 103 are matched with each other, and the elastic pressure-reducing layer 103 is close to the backing film layer 106 and is positioned at the most direct stress surface, the supporting effect of the elastic pressure-reducing layer 103 can obviously increase the stress area of the skin contact surface by taking the elastic pressure-reducing layer as a supporting surface, so that the pressure value of the skin (especially the vertical direction of the skin) contact surface is reduced, and meanwhile, the elasticity of the foam layer 102 can enhance the buffering pressure-reducing effect of the elastic pressure-reducing layer 103. Therefore, the pressure-reducing dressing can achieve the aim of remarkably reducing the occurrence of pressure injury, and can be specially used for preventing the pressure injury. In addition, the foam reduced pressure dressing can be used as a wound dressing for wound treatment after wound wounds such as pressure sores appear.

Example 2

As shown in fig. 3, the reduced-pressure dressing provided in the embodiment of the present disclosure uses the surface close to the skin as an inner layer, and includes an adhesive contact layer 101, a foam layer 102, a unidirectional flow guiding layer 104, a water blocking layer 105, an elastic reduced-pressure layer 103 and a backing film layer 106, which are sequentially stacked from inside to outside. The foam layer 102 is used for cushion decompression of the skin contact surface, and the elastic decompression layer 103 is used for support surface decompression and cushion decompression of the skin contact surface.

In the embodiment of the present disclosure, the unidirectional flow guiding layer 104 is a non-woven fabric layer, and is arranged between the foam layer 102 and the water locking layer 105 in a stacked manner, and is used for guiding the seepage absorbed by the foam layer 102 to the water locking layer 105.

In the embodiment of the present disclosure, the water-blocking layer 105 is a SAF (super absorbent fiber) layer, and has high water absorption and good water retention.

Because the foam layer 102 and the elastic pressure-reducing layer 103 are matched with each other, and the elastic pressure-reducing layer 103 is close to the backing film layer 106 and is positioned at the most direct stress surface, the flexible supporting function of the elastic pressure-reducing layer 103 can obviously increase the stress area of the skin contact surface as a supporting surface, so that the pressure value of the skin contact surface (especially the vertical direction of the skin) is reduced, and meanwhile, the elasticity of the foam layer 102 can enhance the buffering pressure-reducing effect of the elastic pressure-reducing layer 103. Therefore, the pressure-reducing dressing can achieve the aim of remarkably reducing the occurrence of pressure injury, and can be specially used for preventing the pressure injury. In addition, the reduced pressure dressing can be used as a wound dressing for wound treatment after wound wounds such as pressure sores appear.

Example 3

As shown in fig. 5, another pressure-reducing dressing according to the embodiment of the present disclosure is different from embodiment 1 in that the pressure-reducing dressing includes an adhesive contact layer 101, an elastic pressure-reducing layer 103, a foam layer 102, and a backing film layer 106, which are sequentially stacked from inside to outside, with the surface near the skin as an inner layer.

Example 4

As shown in fig. 6, another pressure-reducing dressing provided in the embodiment of the present disclosure is different from embodiment 1 in that the pressure-reducing dressing has an inner layer near the skin surface, and includes an adhesive contact layer 101, an elastic pressure-reducing layer 103, a foam layer 102, an elastic pressure-reducing layer 103, and a backing film layer 106, which are sequentially laminated from inside to outside. Wherein the thickness of the elastic pressure-reducing layer 103 on the side close to the adhesive contact layer 101 is 2mm, and the thickness of the elastic pressure-reducing layer 103 on the side close to the backing film layer 106 is 1mm.

Example 5

The embodiment of the disclosure provides a reduced pressure dressing, which is different from embodiment 1 in that the surface close to the skin is an inner layer, and includes an adhesive contact layer 101, an elastic reduced pressure layer 103, a foam layer 102, an elastic reduced pressure layer 103 and a backing film layer 106, which are sequentially stacked from inside to outside. Wherein the thickness of the elastic pressure-reducing layer 103 on the side close to the adhesive contact layer 101 is 1mm, and the thickness of the elastic pressure-reducing layer 103 on the side close to the backing film layer 106 is 2mm.

Example 6

The embodiment of the present disclosure provides a reduced-pressure dressing, which is different from embodiment 1 in that the thickness of the elastic reduced-pressure layer 103 is 4mm.

Example 7

The embodiment of the present disclosure provides a reduced-pressure dressing, which is different from embodiment 1 in that the thickness of the elastic reduced-pressure layer 103 is 7mm.

Example 8

The embodiment of the present disclosure provides a reduced-pressure dressing, which is different from embodiment 1 in that the thickness of the elastic reduced-pressure layer 103 is 9mm.

Comparative example 1

This comparative example provides a common silicone gel foam dressing, which is a wound dressing, derived from brand 1. The wound surface is taken as an inner layer, and the wound surface comprises a porous silica gel layer, a polyurethane foam layer and a polyurethane film layer which are sequentially laminated from inside to outside.

In the comparative example of the present disclosure, the perforated silicone gel layer is a soft silicone wound contact layer that gently adheres to the skin surrounding the wound while not adhering to the wound bed, which can reduce the risk of secondary injury to the bed.

In the comparative example of the present disclosure, the polyurethane foam layer was 3mm thick, and the layer was used to absorb the liquid permeation.

In the comparative example of the present disclosure, the polyurethane film layer has the functions of water resistance, ventilation, bacteria isolation, and the like.

Comparative example 2

This comparative example provides another common silicone gel foam dressing, which is a wound dressing, derived from brand 1. The wound surface is taken as an inner layer, and the wound surface comprises a porous silica gel layer, a polyurethane foam layer, a non-woven fabric layer, an SAF layer and a polyurethane film layer which are sequentially laminated and arranged from inside to outside.

In the comparative example of the present disclosure, the nonwoven fabric layer was used to guide the seepage absorbed by the foam layer to the SAF layer.

In the comparative example of the present disclosure, the SAF layer has higher water absorption and good water retention.

Comparative example 3

This comparative example provides a common silicone gel foam dressing, which is a wound dressing having the same hierarchical structure as comparative example 1, with brands derived from brand 2.

Comparative example 4

This comparative example provides a common silicone gel foam dressing, which is a wound dressing having the same hierarchical structure as comparative example 1, with brands derived from brand 3.

Comparative example 5

This comparative example provides another common silicone gel foam dressing, which is a wound dressing having the same hierarchical structure as comparative example 2, with brands derived from brand 4.

Comparative example 6

This comparative example provides another common silicone gel foam dressing, which is a wound dressing having the same hierarchical structure as comparative example 2, with brands derived from brand 5.

Reduced pressure testing

The actual using steps of the simulated dressing were that release papers on the dressing of the same specifications of examples 1 to 8 and comparative examples 1 to 6 (the outer contour of the dressing (i.e., the polyurethane film layer) was 10CM by 10CM in size, the inner dressing core was 7.5CM by 7.5CM in size) were peeled off, the porous silica gel face and the peripheral polyurethane film were exposed, and the release papers were applied to a sensor film (the sensor film simulates human skin and consists of 2800 sensor contacts), and 1KG weights were placed in the centers of the dressings, respectively, and after 3 seconds, the pressure values (N/CM) received on the sensor film received by the sensor were read ² )。

TABLE 1 results of reduced pressure testing of different dressings

The results of the reduced pressure test are shown in FIG. 4 and Table 1, and the pressure values (0.16N +.CM ² -0.18N/CM ² ) In contrast, the pressure values experienced by the sensing films using the reduced pressure dressings of examples 1-8 of the present disclosure were reduced to 0.10N/CM ² -0.13N/CM ² The maximum reduction amplitude of the pressure value reaches more than 30 percent. Therefore, the elastic pressure reducing layer and the foam layer are matched to achieve the purpose of mildly and obviously reducing the pressure value of the external pressure of the skin contact surface, and the occurrence rate of the pressure injury of the long-term bedridden or paralyzed patient is expected to be greatly reduced.

As used herein and in the appended claims, the singular forms of words include the plural and vice versa, unless the context clearly dictates otherwise. Thus, when referring to the singular, the plural of the corresponding term is generally included. Similarly, the terms "comprising" and "including" are to be construed as being inclusive rather than exclusive. Likewise, the terms "comprising" and "or" should be interpreted as inclusive, unless such an interpretation is expressly prohibited herein. Where the term "example" is used herein, particularly when it follows a set of terms, the "example" is merely exemplary and illustrative and should not be considered exclusive or broad.

Further aspects and scope of applicability will become apparent from the description provided herein. It should be understood that various aspects of the present application may be implemented alone or in combination with one or more other aspects. It should also be understood that the description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure.

While several embodiments of the present disclosure have been described in detail, it will be apparent to those skilled in the art that various modifications and variations can be made to the embodiments of the present disclosure without departing from the spirit and scope of the disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. The utility model provides a decompression formula dressing, includes viscose contact layer, foam layer and the back lining membranous layer that stacks gradually and arranges, its characterized in that still includes the elasticity decompression layer, elasticity decompression layer set up in between viscose contact layer and the back lining membranous layer for carry out holding surface decompression and buffering decompression to skin contact surface.

2. A reduced pressure dressing according to claim 1, wherein the resilient reduced pressure layer is provided at least on a side adjacent the backing film layer.

3. A reduced pressure dressing according to claim 1 or claim 2, wherein the material of the resilient reduced pressure layer is an elastomer in a three-dimensional mesh structure.

4. A reduced pressure dressing according to claim 3, wherein the material of the resilient reduced pressure layer is a sandwich mesh;

and/or the thickness of the elastic decompression layer is 1mm-10mm; preferably 2mm to 4mm.

5. A reduced pressure dressing according to claim 1, wherein the foam layer is a polyurethane foam layer;

and/or the thickness of the foam layer is 1mm-10mm.

6. A reduced pressure dressing according to claim 1, wherein the adhesive contact layer is a silicone layer or a medical pressure sensitive adhesive.

7. The reduced pressure dressing of claim 1, further comprising a water-blocking layer laminated to a side of the foam layer remote from the adhesive contact layer.

8. The reduced pressure dressing according to claim 7, further comprising a unidirectional flow guiding layer layered between the foam layer and the water blocking layer.

9. A reduced pressure dressing according to claim 1, wherein the dressing is wholly sheet-like;

and/or the dressing is in any one of square, rectangle, round, heart-shaped, melon seed-shaped, concave and Y-shaped.

10. Use of a reduced pressure dressing according to any one of claims 1 to 9 for the prevention of pressure injury and/or wound healing;

preferably, the reduced pressure dressing is used to prevent compressive injuries at the sacral tail, ankle, ischium, elbow, knee of the human body.