EP4359019A1 - Wundabdeckung, zur erhöhung der no konzentration in wunden - Google Patents
Wundabdeckung, zur erhöhung der no konzentration in wundenInfo
- Publication number
- EP4359019A1 EP4359019A1 EP22716081.9A EP22716081A EP4359019A1 EP 4359019 A1 EP4359019 A1 EP 4359019A1 EP 22716081 A EP22716081 A EP 22716081A EP 4359019 A1 EP4359019 A1 EP 4359019A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wound
- synthetic fibers
- carbides
- minerals
- wound dressing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
- A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
- A61L15/18—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing inorganic materials
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
- A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
- A61L15/22—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing macromolecular materials
- A61L15/26—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives thereof
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
- A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
- A61L15/42—Use of materials characterised by their function or physical properties
Definitions
- the present invention describes a wound covering and a method for increasing the NO concentration in a wound by means of a wound covering having fibers in which a proportion of particulate minerals and/or carbides are embedded.
- Plasters are medical products that are applied to a wound and seal it.
- the main goal of a plaster is to prevent dirt and bacteria from entering the body and to support the natural wound healing process.
- a wound covering also popularly known as a plaster, usually consists of a carrier that carries a wound dressing that forms the wound contact layer.
- the carrier is generally attached to the surface of the body with the aid of an applied skin-compatible adhesive, with the wound contact layer coming to lie over the wound to be covered. It is also possible to make the wound cover not self-adhesive and to fix it with bandages on/over the wound.
- the wound contact layer is typically the site of a wound dressing that interacts with the wound. It is the part (surface area) of the dressing that faces the wound. Their task is to prevent, for example, fibers from the wound dressing from penetrating the wound or the carrier from sticking to the wound.
- the wound contact layer can consist of different materials, but polyethylene, polylactide, viscose nonwovens are usually used.
- the wound contact layer Due to the direct exchange with the body, it is advantageous if the wound contact layer has a high level of biocompatibility, since possible additional inflammatory processes and allergic reactions can be avoided, which leads to a better wound healing process.
- biocompatibility means: the ability of a material to fulfill its desired function (in this case to support the wound healing process) without causing undesired local or systemic effects.
- the biocompatibility of a substance not only depends on its intrinsic material properties (hydrophilicity, charge, mechanical properties, etc.), but also on the environment (location) and desired function.
- One way to improve the biocompatibility of a material is to change its surface.
- Antimicrobial agents have long been known to those skilled in the art. Basically, all substances above a certain concentration have a cell-damaging effect and thus also against microbes (e.g. bacteria, fungi), i.e. antimicrobial. Antimicrobial agents are characterized by the fact that the cell-damaging effect on microbes is greater than on the cells of higher organisms (humans, mammals, fish, etc.).
- nitric oxide nitric oxide
- NO is known to contribute positively to wound healing through various mechanisms of action:
- NO promotes angiogenesis the blood vessels are encouraged to form new ones.
- NO has an antimicrobial effect: for example against Pseudomonas aeruginosa, Acinetobacter baumannii, Escherichia coli, Klebsiella pneumoniae and Staphylococcus aureus (also MRSA species).
- Natural minerals and carbides are known to reflect, absorb, emit, cause wavelength interactions (wavelength shifting, amplification, cancellation) and polarize electromagnetic radiation.
- Minerals and carbides in the form of particles are particularly preferred because they have a particularly high surface energy.
- the shape and size of the particles are particularly interesting, since they can effectively influence the effectiveness, for example through the anisotropic influence of the particle shape.
- the best-known naturally occurring minerals include SiC, Si02, CaC2, Ti02, Zr02 and AI203.
- the object of the invention is to provide a cost-effective wound covering which can increase the NO content in the wound by utilizing ambient radiation, in particular light and body heat.
- the object is achieved by a wound covering having a carrier layer, a wound dressing which is fixed to the carrier layer and forms the wound contact layer with its free surface,
- the wound dressing has a content of synthetic fibers
- the fibers are 90 - 99% by weight, based on the total weight of the synthetic fibers, made of a polymer or mixtures of polymers from the group of acrylates, acetates, elastane (especially Lycra, Spandex), polyester, polyamides (especially nylon), viscose (particularly rayon), PU, PE, PET, PP, cellulose or semi-cellulose materials,
- the content of minerals and/or carbides being 1-10% by weight relative to the total weight of the synthetic fibers and
- the maximum particle size of the minerals and/or carbides is less than 1.5 mm and optionally an adhesive mass applied to the backing layer for fixing the wound dressing on the backing and/or fixing the wound covering on the skin.
- the present invention offers the advantage that one's own body heat is used to increase NO production within the wound.
- NO is usually produced enzymatically by macrophages and fibroblasts. NO can be produced from the guanidine group in arginine in an oxidative process.
- An alternative to this biologically internal process is the production of NO by radiation.
- nitrite-rich compounds on the skin are photolytically converted into NO. This is also a natural process and can be caused by UV-A radiation, however, UV imaging of wounds can be counterproductive as they can often lead to scarring.
- wound coverings according to the invention can be used to promote the self-production of NO in the covered wound.
- Wound coverings according to the invention can be used for this, having a content of fibers that enable the absorption and reflection of electromagnetic radiation.
- fibers are known from WO 2020150493 A1.
- the UV-A rays are converted into other wavelengths and replaced by wavelengths in the NIR or FIR range, which promote the body's own NO production.
- the wound dressing used in a wound covering according to the invention is doped with minerals and/or carbides, in particular with SiC, Si02, CaC2, Ti02, Zr02 and/or Al203, by embedding it in the interstices of the wound dressing from a lacquer layer applied to the wound dressing or by incorporation into the respective material of the wound contact layer.
- the subject of a further invention is a method for increasing the NO concentration in a wound by means of a wound covering comprising:
- a wound dressing that is fixed to the carrier layer and forms the wound contact layer with its free surface
- the wound dressing has a content of SiC, SiO 2 , CaC 2 , TiO 2 , ZrO 2 and/or Al 2 O 3 and
- the wound dressing in a wound covering according to the invention preferably has a special wound contact layer that is characterized by biodegradability and high biocompatibility and/or has a wound contact layer with anti-inflammatory properties and/or has a wound contact layer with bacteriostatic properties.
- the carrier system is advantageous, which is breathable at the same time, but also enables moist wound healing as a semi-occlusive barrier.
- a wound dressing according to the invention that promotes wound healing creates a favorable environment for wound healing through physical processes, increases blood circulation in the area surrounding the wound, increases the oxygen content of the wound by releasing or producing nitrogen monoxide using (body) heat radiation
- the NO release within a wound ensures better blood circulation, which promotes faster healing.
- Textiles such as wovens, knits, scrims or fleeces, further nets, foils, foams and laminates made from the above materials and papers may be mentioned by way of example.
- the carrier material is preferably a film, a woven fabric or a fleece, particularly preferably with a thickness of 20 to 200 ⁇ m, in particular with a basis weight of 20 to 200
- the carrier material is preferably selected from the group consisting of cotton, viscose, polypropylene, polyesters, polyamides, PET, PVC, polyethylene, polyurethanes, silicones and polylactic acid.
- the carrier material is preferably selected from the group consisting of cotton, viscose, polyesters, polyethylene and polyurethanes. g/m2.
- the carrier material is particularly preferably a polyurethane film, a polyethylene film, a polyester fleece, a woven fabric made from viscose, polyester or cotton or a woven fabric made from any mixtures of viscose, polyester and/or cotton.
- the backing material preferably has an air- and water-vapor-permeable but water-impermeable layer of adhesive with a thickness of about 10 to 200 ⁇ m.
- backing materials which, after application of the adhesive, can be used in such a way that they meet the requirements for a functional skin contact.
- the wound dressing can include a substrate for absorbing wound exudate.
- Suitable materials for wound dressings are viscose fibers, which can consist of cellulose, bamboo and similar materials.
- Other suitable polymers for the production of wound dressings are PLA (polylactide), PHA (polyhydroxyalkanoate) and PP (polypropylene).
- Different encapsulated active ingredients can also be stored in the wound dressings, with the active ingredients also promoting wound healing.
- active ingredients also promoting wound healing.
- antimicrobial active ingredients, active ingredients that promote wound healing, active ingredients that relieve pain are advantageous.
- the synthetic fibers used in wound coverings according to the invention are preferably produced by common manufacturing processes (extrusion, spinning), for which purpose the main fiber material is dissolved in suitable ionic solvents and minerals and/or carbides are added to this solution. These resulting suspensions are spun or extruded to give the synthetic fiber to be used according to the invention.
- These synthetic fibers can be processed into the wound dressing according to the invention as a woven fabric or fibrous web (particularly a nonwoven fabric).
Landscapes
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Veterinary Medicine (AREA)
- Hematology (AREA)
- Public Health (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials For Medical Uses (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Medicinal Preparation (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021206439 | 2021-06-23 | ||
| PCT/EP2022/057520 WO2022268368A1 (de) | 2021-06-23 | 2022-03-22 | Wundabdeckung, zur erhöhung der no konzentration in wunden |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4359019A1 true EP4359019A1 (de) | 2024-05-01 |
Family
ID=81306740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22716081.9A Ceased EP4359019A1 (de) | 2021-06-23 | 2022-03-22 | Wundabdeckung, zur erhöhung der no konzentration in wunden |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP4359019A1 (de) |
| AU (1) | AU2022298911A1 (de) |
| DE (1) | DE112022003204A5 (de) |
| MX (1) | MX2023015261A (de) |
| WO (2) | WO2022268368A1 (de) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1049941C (zh) * | 1996-12-10 | 2000-03-01 | 珠海经济特区天年高科技国际企业公司 | 含有无机氧化物复合粉体的医用无纺布 |
| CA2479958C (en) * | 2002-03-22 | 2009-11-03 | Holofiber, Llc | Polymeric fiber composition and method |
| FR2990855B1 (fr) * | 2012-05-22 | 2014-05-30 | Rhodia Poliamida E Especialidades Ltda | Utilisation d'une composition contenant un polymere et des charges minerales pour lutter contre le vieillissement cutane |
| ES2629283T3 (es) * | 2012-06-18 | 2017-08-08 | Rhodia Poliamida E Especialidades Ltda | Composición polimérica que contiene cargas minerales, para mejorar la cicatrización de la piel |
| GB201309091D0 (en) | 2013-05-20 | 2013-07-03 | Edixomed Ltd | Dressing system |
| AU2020209227A1 (en) | 2019-01-16 | 2021-08-19 | Hologenix, Llc | Cellulose and semi-cellulose based fibers and yarns embedded with mineral particles and methods of making the same |
-
2022
- 2022-03-22 DE DE112022003204.9T patent/DE112022003204A5/de active Pending
- 2022-03-22 AU AU2022298911A patent/AU2022298911A1/en active Pending
- 2022-03-22 MX MX2023015261A patent/MX2023015261A/es unknown
- 2022-03-22 WO PCT/EP2022/057520 patent/WO2022268368A1/de not_active Ceased
- 2022-03-22 EP EP22716081.9A patent/EP4359019A1/de not_active Ceased
- 2022-03-22 WO PCT/EP2022/057524 patent/WO2022268369A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| AU2022298911A1 (en) | 2023-09-28 |
| MX2023015261A (es) | 2024-01-19 |
| WO2022268368A1 (de) | 2022-12-29 |
| DE112022003204A5 (de) | 2024-04-25 |
| WO2022268369A1 (de) | 2022-12-29 |
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