DE202014100383U1 - Wound care article comprising a material with high restoring force - Google Patents

Wound care article comprising a material with high restoring force

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Publication number
DE202014100383U1
DE202014100383U1 DE201420100383 DE202014100383U DE202014100383U1 DE 202014100383 U1 DE202014100383 U1 DE 202014100383U1 DE 201420100383 DE201420100383 DE 201420100383 DE 202014100383 U DE202014100383 U DE 202014100383U DE 202014100383 U1 DE202014100383 U1 DE 202014100383U1
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Germany
Prior art keywords
wound care
care article
material
preceding
article according
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Expired - Lifetime
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DE201420100383
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German (de)
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Birgit Riesinger
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Application filed by Birgit Riesinger filed Critical Birgit Riesinger
Priority to DE201420100383 priority Critical patent/DE202014100383U1/en
Priority claimed from PCT/EP2014/078316 external-priority patent/WO2015091697A1/en
Publication of DE202014100383U1 publication Critical patent/DE202014100383U1/en
Application status is Expired - Lifetime legal-status Critical
Anticipated expiration legal-status Critical

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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/02Adhesive plasters or dressings
    • A61F13/0203Adhesive plasters or dressings having a fluid handling member
    • A61F13/0206Adhesive plasters or dressings having a fluid handling member the fluid handling member being absorbent fibrous layer, e.g. woven or nonwoven absorbent pad, island dressings
    • A61F13/0209Adhesive plasters or dressings having a fluid handling member the fluid handling member being absorbent fibrous layer, e.g. woven or nonwoven absorbent pad, island dressings comprising superabsorbent material
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/00004Non-adhesive dressings
    • A61F13/00034Non-adhesive dressings characterized by a property
    • A61F13/00038Flexibility, stretchability or elasticity
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/00051Accessories for dressings
    • A61F13/00068Accessories for dressings specially adapted for application or removal of fluid, e.g. irrigation or drainage of wounds, under-pressure wound-therapy
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/008Drainage tubes; Aspiration tips
    • A61M1/0088Drainage tubes; Aspiration tips with a seal, e.g. to stick around a wound for isolating the treatment area
    • A61M1/009Drainage tubes; Aspiration tips with a seal, e.g. to stick around a wound for isolating the treatment area having pumping means on suction site, e.g. miniature pump on wound dressing

Abstract

Wound care article comprising a material with high restoring force.

Description

  • The present invention relates to a wound care article according to the preamble of claim 1.
  • Wound care articles must cover a wide range of tasks. On the one hand, it requires you to be able to absorb liquids and, on the other hand, they have to have a cushioning effect in such a way that the pain sensation of the patient on contact with the periphery is reduced.
  • In the prior art, wound care articles which have foams are known for this purpose. The above-mentioned objects are achieved by the foams used at least partially satisfactory.
  • However, the wound care articles mentioned have only a very narrow range of indications. In particular, they can not hold liquids for long (lack of retention), and they also do not actively interfere with the fluid intake process.
  • SUMMARY OF THE INVENTION
  • The object of the present invention is to provide a wound care article which does not have the disadvantages described above.
  • Another object of the present invention is to provide a wound care article having improved retention.
  • Another object of the present invention is to provide a wound care article, with which a good contact to the wound base can be produced.
  • Another object of the present invention is to provide a wound care article in which the suction effect of any superabsorbent particles present is promoted.
  • Another object of the present invention is to provide a wound care article in which by simple means a negative pressure effect on the wound can be exercised.
  • DETAILED DESCRIPTION OF THE INVENTION
  • This object is solved by the independent claims of the present invention. The dependent claims indicate preferred embodiment.
  • According to the invention therefore a wound care article is provided, comprising a material with high restoring force.
  • In the following, the term "wound care article" is intended in particular to designate a wound dressing, preferably a flat wound dressing or a wound care cloth. Said wound dressing contains a flat layer and can be designed to be both absorbent and non-absorbent or only insubstantially absorbent. In particular, the term "wound care article" may also be understood as an ensemble of various products placed in a given arrangement on the wound to be treated. This ensemble can form a physical unit by the various products are combined in a common shell or - if necessary, without a shell - are adhesively bonded together. However, the ensemble may also be in the form of a kit in which the various products are placed on the wound to be treated by means of a coil in the given arrangement.
  • The term "restoring force" denotes a force which acts on a mass moved out of its rest position. The restoring force acts in the direction of the rest position of this mass. As the deflection increases from the rest position, the restoring force causes a reduction in speed and, as the deflection decreases, an increase in speed. Due to the effectiveness of the 2nd Newton's law, the restoring force leads to a positive or negative acceleration of the oscillating mass.
  • Methods and devices for determining the restoring force in particular of viscoelastic foams are described, for example, in US Pat DE 10252211 described. In this case, a test specimen is compressed by means of a light, rigid pressure plate against a solid surface to a predetermined level and released abruptly after a holding time in the compressed state, so that the specimen can relax to its original shape. The measuring device is used to determine the timing of the unimpeded relaxation process from the compressed state to the relaxed state, depending on the compression and the holding time.
  • The high resiliency material may be a textile material, a spacer fabric or a composite. It is preferably provided that the material with high restoring force is a foam element.
  • Said foam can be any conventional foam, including Natural sponges, provided that the requirements for sufficiently high restoring forces are met.
  • The sufficient high restoring forces are required so that the foam performs its inventively provided tasks that go well beyond the usual in the wound context a foam upholstery and suction effects. Thus, the high restoring forces provide improved fluid retention Further effects are described below.
  • It is preferably provided that the foam element comprises a cold foam, a visco-elastic foam, a latex foam, a silicone foam or a rubber-based foam.
  • The foams mentioned are characterized by high restoring forces. While conventional foams are usually made of Polyätherschaumstoffe, cold foams are usually made of preferred Polyäther- or polyurethane grades and Viscoelastic foams polyurethane grades, and are foamed with suitable blowing agents or completely propellant-free. In the latter case, the foaming occurs when the chemical ground substance meets with water.
  • Viscoelastic foams have the property to adapt to a body contour. This adjustment is made by the body heat causing a deformation of the material which, after being removed, returns to its original shape
  • Rubber-based foams are also often referred to as sponge rubber and refer to open-cell and elastic foams made of chloroprene, natural rubber, acrylonitrile-butadiene rubber or comparable synthetic rubbers. Such materials are for example in EP 2045287 A1 disclosed
  • Preferably, it is further provided that the foam element has an open-cell foam or a mixed-cell foams.
  • In open-celled foams, the cell walls are not closed; these foams can therefore absorb liquids. Mixed cellular foams contain both open and closed cells.
  • The restoring forces of the foam in the wound care article according to the invention are essentially determined by the parameters of density, compressive strength, indentation hardness and, in particular, compression set.
  • Preferably, it is further provided that the material having a high restoring force has a density in the range between ≥ 10 and ≤ 100 kg / m 3 .
  • The density by volume means the kg-weight per 1 m 3 foamed raw mass, or, in other words, the weight of a cubic meter of foam prior to its further processing. The methods for determining the density are UNI 6349 DIN 53420 ISO 1855 Tolerance +/- 5%. Preferably, the density in the range ≥ 40 and ≤ 90 kg / m 3 .
  • Preferably, it is further provided that the material having a high restoring force has a compression hardness in the range between ≥ 1.0 and ≦ 10 kPa.
  • The compression hardness or compression resistance is the pressure (expressed in kilopascals = Kpa) necessary to compress a specimen up to 40% of its original thickness by means of an indentor (whose shape and dimensions have been determined). The lower the compression hardness (kPa), the softer the foam. The specimen is a parallelepiped with the dimensions 100 × 100 × 50 mm; one controls the dimension of the specimen and determines the area to be compressed; place it in the middle of the plate of the measuring instrument, compress it by 40% of its own thickness and determine the necessary force. The result is expressed in Kpa. The methods for determining the compression hardness are: DIN 53577 UNI 6351 ISO 3386 Tolerance +/- 15%. The compressive strength is preferably in the range ≥ 2 and ≦ 8 kPa, particularly preferably in the range between ≥ 4 and ≦ 6 kPa.
  • Preferably, it is further provided that the material having a high restoring force has a Eindrückhärte in the range between ≥ 50 and ≤ 1000 N.
  • Impression hardness or crush resistance is the force necessary to force an indenter (whose shape and dimension are defined) into the test material up to 25%, 40% and 65% of its own thickness. The sample, which is larger than the indenter, is placed in the middle of the dynamoeter plate. With each compression of the test material up to 25%, 40% and 65% of its own thickness, the load is held for 30 seconds; then the value of the compression resistance is determined in Newton = N. The results are expressed as indentation hardness or crush resistance at 25%, 40% and 65% loading in Newtons. The compression factor or sag factor is the ratio between the resistance at 65% and at 25% compression and provides a valid indication the evaluation of the suitability and comfort of the foam. The hatched area between the curves of the diagram represents the hysteresis; a lower hysteresis corresponds to a greater elasticity. The methods for determining the indentation hardness are: DIN 53576 / B UNI 6353 ISO 2439 Tolerance +/- 15%, possibly also DIN 53579-1 , The indentation hardness is preferably in the range ≥ 100 and ≦ 500 N.
  • Preferably, it is further provided that the material having a high restoring force has a compression set m range between ≥ 0 and ≤ 10%.
  • The compression set is the value of the percentage thickness loss of the specimen after compression under special conditions. The test specimen is a quadratic-based parallelepiped with a thickness of 50 mm. This is stretched between two parallel plates and compressed up to 50, 75 and 90% of its original thickness; then he comes for 22 hours in a circulating air oven at a temperature of 70 ° C; after this time he is stretched out and has to rest for 30 minutes; then its thickness is measured. The results are expressed as percentages of thickness, based on the different compression values. The methods for determining the compression set are: DIN 53572 UNI 6352 , The compression set is preferably in the range ≥ 0 and ≦ 8%, preferably ≦ 6%, ≦ 4%, ≦ 3%, ≦ 2%, ≦ 1%.
  • Preferably, it is further provided that the material having a high restoring force has a thickness of ≥ 10 mm and ≤ 100 mm. A minimum thickness of the material is a prerequisite for the described pumping action. The material preferably has a thickness of ≥ 15 mm, ≥ 20 mm, ≥ 25 mm, ≥ 30 mm, ≥ 35 mm, ≥ 40 mm, ≥ 45 mm, ≥ 50 mm, ≥ 55 mm, ≥ 60 mm, ≥ 65 mm, ≥ 70 mm, ≥ 75 mm, ≥ 80 mm, ≥ 85 mm, ≥ 90 mm or ≥ 95 mm.
  • Preferably, it is further provided that the material is introduced with a high restoring force in a gas-tight enclosure. This can be done for example via a gas-tight film, in which the foam element is introduced, and / or by a gas-tight lamination, as is realized for example in integral foams.
  • Furthermore, it is preferably provided that the foam element is designed evacuatable via a valve. In this way, as shown in the drawing descriptions, the foam element can be evacuated by suction of air. This evacuation can take place in the state already applied to the patient.
  • Preferably, it is further provided that the material is pre-evacuated with high restoring force. In this embodiment, the material is delivered pre-evacuated with high restoring force and can applied to the patient state by opening a valve - for example, a detachable with a pull cord adhesive film - on the wound side facing the envelope, the negative pressure transmitted to the wound and so a suction effect on if necessary . Exudates existing in the wound base of the wound.
  • Preferably, it is further provided that the material acts as a vacuum pump with high restoring force. For this purpose, two valves are required. After placement of the wound care article on the wound can be evacuated by exerting pressure on the foam element - for example by hand - the latter initially be evacuated via the first valve, and after completion of the pressurization, as in the manner described above via the second valve of the negative pressure on the Wound transferred and so a suction effect on possibly existing in the wound base of the wound exudates are exercised.
  • In the two embodiments mentioned, the suction effect of the material with a high restoring force and the suction effect of the superabsorbent polymers present in a possibly present absorption body can complement each other synergistically.
  • Preferably, it is further provided that the wound care article has a depot for one or more active ingredients. This is preferably designed so that the said active substances can be released by pressure or kinking. Such a depot can be arranged, for example, on the wound-facing side.
  • In such a depot example, biocidal agents may be provided, for. As antibiotics, heavy metals and heavy metal ions (for example, based on silver, zinc or copper), octenidine, defensins, quaternary ammonium compounds, Bakeriophagen and similar agents. However, other agents such as honey, surfactants, collagen, adsorbents for bacteria and the like may also be provided.
  • It can be provided that initially released by the exertion of pressure on the material with high restoring force and optionally released into the wound, such as pharmaceuticals - and only then uses the pumping action described above. In this way, the said active substances and / or any accumulating waste products (for example endotoxins, which are generated by the elimination of bacteria in the wound) are subsequently removed.
  • Furthermore, the wound care article may also contain adjuvants such as carboxymethyl cellulose or hyaluronic acid.
  • Preferably, it is further provided that the wound care article has an activatable heat accumulator, for example a latent heat accumulator. Here, a so-called phase change material is used whose latent heat of fusion, solution heat or heat of absorption is substantially greater than the heat which it has due to its normal specific heat capacity (without the phase transformation effect). could save. An example of this is sodium acetate trihydrate. This is liquefied at a melting temperature of 58 ° C, z. B. in the microwave. When heated, the cushion must be completely covered with water (water bath) constantly, otherwise locally hot salt will melt the bag. The material also remains liquid at temperatures well below the melting point - possibly down to -20 ° C - as supercooled melt in a metastable state, since the salt dissolves in its water of crystallization; The water molecules form a kind of own crystal lattice, which dissolves first. If now a metal plate (similar to the one in a crackpot frog) pressed in the heat pad, which triggers the crystallization. The pad heats up again to the melting temperature, whereby the complete crystallization and thus the release of the latent heat can extend over a longer time.
  • As a trigger for the crystallization of the supersaturated solution are:
    • • the pressure wave, which is triggered by the pressing of the metal plate,
    • • The resulting release of microscopic crystallization nuclei, the
    settle in small cracks of the metal at each crystallization. A problem of the explanation by the pressure wave is that the crystallization in the experiment by sound waves, even by ultrasound, is not triggered. Other salt hydrates may also be used, e.g. B. Glauber's salt with a melting point of 32.5 ° C or alum.
  • Preferably, it is further provided that the material is formed with a high restoring force so that it can be pressed in the patient applied to the state of the wound care article in the evacuated state by evacuation to the wound base of a wound.
  • In this way, it is achieved that the material with high restoring force serves to adapt the wound care article in a form-fitting manner to the wound base. For this purpose, it may be provided that after attachment of the wound care article to the skin of the patient, the foam element is set by means of a valve, not shown, under vacuum. Since, as shown in the other figures, the wound care article is peripherally attached to the skin gas-tight, in this way the material with high restoring force is pressed against the wound base and thus establishes contact therewith, which considerably facilitates the uptake and removal of wound exudates ,
  • It is preferably provided in particular that the material with high restoring force - for example, the foam element - incisions, recesses, folds, depressions, elevations or kinks, which give it a higher flexibility. This facilitates in particular the adaptation to the wound anatomy, for example in the wound base.
  • It is further preferred that the foam element contains incorporated superabsorbent polymers. It is also preferred that the wound care article further comprises a layer of absorbent material. It is preferably provided that the layer of an absorbent material comprises a fleece, preferably an airlaid, and / or that the absorbent material has superabsorbent polymers.
  • In combination with the material with high restoring forces, a further improved fluid retention is mediated. Furthermore, it can thus be ensured that the suction effects exerted by the foam and the superabsorbent polymers on the exudate complement each other synergistically.
  • The term "nonwoven" refers to a fabric of individual fibers which, unlike fabrics, knits and knits, is not made from yarns. Nonwovens retain their structural integrity i. d. R. by adhesion of the individual fibers to each other. They are also referred to as "nonwovens", and z. B. made by forging the fibers.
  • The term "airlaid" refers to a special nonwoven fabric made of pulp and polyolefin fibers, in which possibly superabsorbent polymers are embedded.
  • "Superabsorbent polymers" (SAP) are plastics that are capable of absorbing many times their own weight - up to 1000 times - in liquids. Chemically, this is a copolymer of acrylic acid (propionic acid, C3H4O2) and sodium acrylate (sodium salt of acrylic acid, NaC3H3O2), wherein the ratio of the two monomers to each other may vary. additionally a so-called core cross linker (CXL) is added to the monomer solution, which connects the long-chain polymer molecules formed in places with each other by chemical bridges (they "cross-linked"). These bridges make the polymer water insoluble. When water or aqueous salt solutions penetrate into the polymer particles, it swells up and tightens this network at the molecular level so that the water can no longer escape without help.
  • The superabsorbent particles can be present in powder or granular form in a particle size between 100 and about 1000 microns.
  • However, in the case of superabsorbent polymers, the fibrous form is particularly preferred since it is a very soft product in both the dry and the swollen state, which is modulatable and non-rigid, in contrast to the superabsorbent polymers present in granular or powder form Moreover, it has a low abrasiveness. This applies both to fibers as such and also to fiber knitted fabrics, scrims or nonwovens and / or fiber wadding.
  • The said properties make superabsorbent polymers in fiber form particularly suitable for products according to the invention, which are designed as patient pads and decubitus pads. Especially in these applications, it is particularly important to high softness.
  • Furthermore, Applicant has observed that superabsorbent polymers in fiber form have a faster response to liquids than superabsorbent polymers in granular or powder form. Thus, superabsorbent polymers in fiber form support the wicking effect of the wells of the invention.
  • However, said superabsorbent polymers may also be derivatives of cellulose, preferably
  • Sulfoalkylated cellulose and its derivatives, preferably cellulose ethylsulfonates carboxyalkylated cellulose, preferably carboxymethylcellulose, carboxyethylcellulose and / or carboxypropylcellulose, more complex cellulose derivatives, such as sulphoethylcarboxymethylcellulose, carboxymethylhydroxyethylcellulose, hydroxypropylmethylcellulose, and amidated cellulose derivatives, such as carboxymethylcellulose amide or carboxypropylcellulose amide.
  • However, said superabsorbent polymers may also be alginates. Likewise, said superabsorbent polymers may also be hydrogel nanoparticles comprising hydroxy-terminated methacrylate monomers such as 2-hydroxyethyl methacrylate (HEMA) and / or 2-hydroxypropyl methacrylate (HPMA), e.g. B. marketed as Altrazeal act.
  • The superabsorbent polymers can be present in the wound care article for cavities according to the invention in the form of a granulate, a powder, a filling, a compact, a foam, in the form of fibers, a fiber knitted fabric, nonwoven fabric and / or a fiber wadding. For example, the absorbent material may be 40 wt% or more of superabsorbent polymers.
  • Preferably, it is further provided that the position of the absorbent material is formed in the form of a sheet-like absorption body
  • Said sheet-like absorbent body comprises at least one material selected from the group consisting of a mat, in particular an airlaid of said yarns or fibers of superabsorbent polymers with incorporated superabsorbent polymers, and / or a loose filling of superabsorbent polymers. Said Airlaid mat may preferably have a substantially flat material portion of absorbent material, the z. B. consists of an absorbent fleece of said fibers with superabsorbent polymers distributed therein.
  • The sheet-like absorbent body may correspond to the absorbent pad contained in a wound dressing of the assignee of the present invention, as disclosed, for example, in U.S. Pat WO 03094813 , of the WO 2007051599 and the WO 0152780 and sold under the trade name "sorbion sachet". The disclosure of the said writings is fully attached to the disclosure of this document.
  • In another embodiment, the two-dimensional absorption body can also form a core which-optionally flake-like fibers or yarns of superabsorbent polymers and superabsorbent polymers in granular form, wherein the granules are glued or welded to the fibers or yarns at several heights, and the granules are distributed over more than 50% of the total height of at least a portion of the core with intermingled regions of granules and fibers. The proportion by weight of the superabsorbent polymers may preferably be in the range between 10-25% by weight. Similar constructions are known from conventional incontinence materials and known as sanitary napkins for their cushioning properties. Around said core, a shell may be arranged in areas is arranged overlapping, and the z. B. an adhesive seam covered or part thereof.
  • In another embodiment, the sheet-like absorbent body may also comprise at least one flat sheet comprising fibers or yarns of superabsorbent polymers to which superabsorbent polymers in granular form are adhered. This results in a preferred embodiment, a structure of the body having at least three layers, wherein two cover layers surrounding a layer having superabsorbent polymers. There are no mixtures of fibers and superabsorbent polymers in the plane; but only fixed announcements of both materials.
  • Preferably, it is further provided that the position of the absorbent material is the material with high restoring forces or considered.
  • Furthermore, it is preferably provided that the layer of the absorbent material has punches, incisions, recesses and / or slots.
  • This embodiment ensures that a so-called "gel blocking" formed by the formation of a gel by means of the superabsorbent polymers used is prevented in the layer of the absorbent material, which in turn could possibly prevent the material from being built up by the foam or by any pump Negative pressure continues into the wound region.
  • In this case, it is preferably provided that the punches, incisions, recesses and / or slots in their shape and arrangement correspond to the shape and arrangement of punches, incisions, recesses and / or slots in the absorbent material facing side of the gas-tight envelope of the material are introduced with high restoring force.
  • In this way, the said "yellow blocking" is particularly effectively prevented.
  • In this case, only one punching, incision, recesses and / or slot may be provided, if in the absorbent material facing side of the gas-tight envelope of the material with high restoring force in each case also only one punch, incision, recesses and / or slot are provided, for example the valve discussed elsewhere herein (possibly with drawstring).
  • Likewise, the shape and arrangement of the punches by the location of corresponding openings in the in 11 be defined wound facing portion of the gas-tight enclosure defined.
  • Preferably, it is further provided that the layer of the absorbent material has a sheath.
  • Incidentally, said casing can likewise have the aforementioned punches, incisions, recesses and / or slots whose shape and arrangement can also be adapted to corresponding punches, incisions, recesses and / or slots on the side of the gastight envelope of the material with high restoring force can. Said sheath can for example consist of a polypropylene fleece.
  • Furthermore, it is preferably provided according to the invention that the wound care article moreover has a wound distance grid.
  • Such a wound spacer grid may have a film having pores and / or perforations. Said film preferably consists of a thermoplastic film of a polyolefin, for example PE. Such films are produced, for example, by the companies Tredegar or RKW.
  • Preferably, it is further provided that the pores and / or perforations are designed three-dimensional. In this way, a material with a smooth and a rough side, similar to the product Sorbion Plus. This is in the patent application WO 2007118652 whose contents are fully referenced here.
  • When the smooth side is applied to the wound, in addition to the usual advantages of primary dressings (poor adhesion to the wound, prevention of the intrusion of wound material into the wind support), a fluid-conducting function is also required; so are formed by the three-dimensional pores and / or perforations collar, which are arranged on the side facing away from the wound and hinder a backflow of wound exudate into the wound.
  • When the rough side is applied to the wound, the primary dressing develops an abrasive action capable of breaking biofilms and inducing debridement. This effect is in the patent application DE 10 2012 100 842 whose contents are fully referenced here.
  • Preferably, it is further provided that the wound distance grid has a gauze or a tissue having pores and / or lattice honeycombs. Such products are known for example under the brand name Adaptic (consisting of a cellulose acetate net).
  • Preferably, it is further provided that the wound spacer grid of a silicone or of a can be made of or coated with silicone coated material. So z. As a grid, which consists of a silicone or a silicone-coated material or comprises this, be provided, or a perforated or pored foil, a perforated or pore-forming web or fabric or a mesh of a plastic material - for example polyethylene , Polypropylene or polyamide - be provided that is coated with a silicone on at least one side.
  • The silicone can be designed so that it acts decidedly adhesive, such that the primary dressing adheres to the wound, but also prevents adhesion of the possibly frequently to be changed secondary dressing to the wound, or even a Eingranulation of the same. The adhesion properties of silicone can be set very technically very precise, so that a secure adhesion can be ensured without a detachment of the wound distance grid causes pain - such as adherent body hair - or even traumatic.
  • Preferably, it is further provided that the elemental or internal heavy metals are applied by coating the wound spacer mesh, comprising, for example, silver, copper or zinc-containing components. Preferably, it is further provided that the elemental or internal heavy metals are introduced by coextrusion into the wound spacer grid. They should generally have an antimicrobial effect.
  • Preferably, it is further provided that the wound care article has a path which can be arranged on the skin of a patient or a carrier plate which can be arranged on the skin of the patient.
  • Said path or said support plate can be designed such that a wound covering element is arranged distally on it. In this embodiment, for example, it may be provided that said plate or track has a central opening which comes to rest over the wound. Said plate or track is then designed as a frame. Alternatively it can be provided that said plate or track is designed so that a window can be cut into the plate or web according to the contour of the wound. For this purpose, z. B. recorded the contour of the wound and then cut accordingly with a pair of scissors. Likewise, a template can be used, with the help of which the wound contour can be transferred to the plate or web or by means of which the wound contour can be cut out on the plate or the web.
  • For example, said plate or sheet is preferably a hydrocolloid material as described herein. Said web also preferably consists of a so-called incision foil. This is a self-adhesive film made of a polymer material. It is provided that the wound care article is designed in such a way that it can follow the movement sequence of the relevant body site. For this example, parts of the wound care article may be elastic. Likewise, a pleating or one or more expansion bellows may be provided.
  • In order to make a connection with distally arranged components of the wound care article, for example a cover foil, various types of connections can be realized, for example a inguinal closure. In the following, all types of openable, positive-locking closures are subsumed under the term "bar fastener". According to the tongue-and-groove principle, lips are provided here on the two workpieces to be joined together by means of a closure. Said lips are preferably made of elastic materials, for example rubber, rubber, polyethylene or polypropylene.
  • Such closures are known, for example, from resealable hand luggage bags for the transport of cosmetics in the aviation, resealable storage bags for frozen storage, or resealable storage containers ("Tupperdosen").
  • The said grouser closures are also known under the pseudonyms "Ziplock", "Minigrip" or sliding closure. In the latter case, a slider may be provided, which slides similarly to a zipper along the lips to be closed and urges them into the closed position.
  • Further fall also so-called bead closures, as for example in the WO 03013976 A1 are described under the term "inguinal closure".
  • Importantly, said closures are capable of producing a watertight or gas-tight connection, and also require low height and weight, and also require low closing force. In this way, the opening or closing without pain can be exercised. The latter can be accomplished, for example, by an embodiment with a slider (or an embodiment with a rear handle option.
  • As an alternative to the above embodiment, it can be provided that said gastight closure is designed in the form of a magnetic closure. For this purpose, in particular flexible be provided ferromagnetic bands. Said magnetic closure has similar advantages in terms of operability. It can also be made waterproof or gas-tight. Likewise, it may be technically designed so that it maintains its gas tightness even under the said difficult conditions.
  • As an alternative to the above embodiment it can be provided that said gas-tight seal is designed in the form of a seal / adhesive seal. Two foils are sealed tightly together in a sealed zone. With a pull-tab, the first film can be easily pulled from the second film; The adhesive layer integrated in a depression is thereby exposed. A carrier layer of polyester, a pressure-sensitive adhesive and a sealing layer with integrated migration barrier form the components of the lower film. The thicknesses are between 200-500 μm. Said seal / adhesive seal is for example from the EP 2067717 and has similar advantages in terms of operability. It can also be made waterproof or gas-tight. Likewise, it may be technically designed so that it maintains its gas tightness even under the said difficult conditions.
  • As an alternative to the above embodiment, it can be provided that said gastight closure is designed in the form of a hook-and-loop fastener, possibly with an inner sealing lip. is executed. Said Velcro fasteners have similar advantages in terms of operability. It can also be designed to be gas-tight. It can also be technically designed so that it maintains its gas-tightness even under the aforementioned difficult conditions.
  • Preferably, the wound care article further comprises an adhesive material for securing it to the skin of a patient. Any type of physiologically acceptable adhesive may be used, in particular all medical adhesives. Particularly preferably, the material is selected from the group containing
    • • Acrylic adhesive
    • • silicone
    • • Hydrocolloid adhesive
    • • zinc oxide adhesive, and / or
    • • latex glue
  • Hydrocolloid adhesives usually consist of a thin polymer film which is applied to a self-adhesive mass. The carrier substance (eg synthetic rubbers such as polyisobutylene) contains swelling particles, which are somewhat different depending on the manufacturer. Often, source particles such as carboxymethyl cellulose or sodium carboxymethycellulose are included. In addition, they are especially easy to model after heating. Hydrocolloid adhesives work very well in two-dimensional webs and in particular have the ability to exclude moisture. They are available in pasty form, but also in plate and sheet form.
  • Something similar applies to silicone materials. In the case of the latter, in particular the degree of adhesion to the skin can be adjusted very well, so that an atraumatic dressing change can be ensured despite secure adhesion.
  • Such a silicone adhesive may preferably be in the form of a removable adhesive laminate which comprises a structural layer which carries a hydrophobic gel, for example in the form of a silicone gel, on the wound-facing side and a pressure-sensitive adhesive, for example in the form of an acrylate adhesive, on the side facing away from the wound. Such a layer is for example in the EP 2001424 B1 described.
  • Preferably, the wound care article further comprises a vacuum pump. Said vacuum pump may be designed, for example, as a micropump. In this way, the wound care article according to the invention can also be used a vacuum therapy, in which the exudates are actively removed from the wound. This embodiment synergistically complements the suction effects exerted by the micropump, the superabsorbent polymers present in the absorbent body, and optionally the foam element. As a result, it is possible to operate with lower negative pressures compared to conventional vacuum therapy products (for example with -80 mm Hg instead of -120 mm Hg), resulting in a longer battery life and a reduced operating noise and at the same time the occurrence of negative-pressure side effects, such as for example, ischemia, reduced. Furthermore, in such an embodiment, an external canister for receiving the exudate can be dispensed with,
  • The invention further provides the use of a wound care article according to one of the preceding claims for the treatment of wounds, in particular wounds comprising deep-seated edema or incision wounds (i.e., post-operative scars). With regard to the latter application, the wound care article has an elongated outer shape. Also, according to the invention, the use thereof is provided in a vacuum wound care system in the form marketed by Smith & Nephew and KCI. In each case, a suction head can be used.
  • According to the invention, an absorbent material layer in the form of a sheet-like absorption body is furthermore provided, comprising a fleece, preferably an airlaid, and / or superabsorbent polymers, for use in a wound care article according to one of the preceding claims, wherein the planar absorption body punches, incisions, recesses and / or Slits has.
  • For this embodiment, what has been said above with reference to any gel blocking is analogous.
  • It is preferably provided that the punches, incisions, recesses and / or slots correspond in their shape and arrangement of the shape and arrangement of punches, incisions, recesses and / or slots, in the absorbent material facing side of a gas-tight enclosure of the material are introduced with high restoring force.
  • For this embodiment, what has been said above with reference to any gel blocking is analogous.
  • Furthermore, it is preferably provided that the layer of the absorbent material has a sheath.
  • Incidentally, said casing can likewise have the aforementioned punches, incisions, recesses and / or slots whose shape and arrangement can also be adapted to corresponding punches, incisions, recesses and / or slots on the side of the gastight envelope of the material with high restoring force can.
  • Said sheath can for example consist of a polypropylene fleece.
  • LIST OF REFERENCE NUMBERS
  • 1
    Foam layer
    2.1
    Sachet, not wetted
    2.2
    Sachet after volume increase
    3
    wound base
    4
    Upholstery layer (spacer knitted fabric, flexible foam, textile or composite thereof
    5
    Cover film, elastic; plastically deformable
    6
    frame
    7
    Wound environment (skin)
    8th
    Adhesive agent between the skin 7 and the frame 6
    9
    Adhesive agent between the cushion layer 4 and the frame 6
    11
    Recess in the foam 1 for the sachet
    12
    Quick distribution layer
    13
    Window (flap)
    14
    Micropump in the padding layer 4
    15
    Wound distancing grid
    16
    Velcro element
    17
    Grooves (for a click connection)
    18
    Airtight shell
    19
    Valve
    20
    Valve
    21
    drawstring
    22
    foam section
    23
    foam section
    24
    timer
    26
    Valve
    27
    second wound-facing film section having openings
    30
    depot
    34
    openings
  • The present invention will be explained in more detail by the figures shown and discussed below. It should be noted that the figures have only descriptive character and are not intended to limit the invention in any way.
  • 1a schematically shows a wound care product in cross section, comprising a layer 1 from a foam element with high restoring forces. On the wound side there is also a wound distance grid 15 provided, which has openings for the passage of liquid and to prevent sticking to the wound. Likewise, the wound is a frame 6 provided, which consists of a band that on the one hand has adhesive properties.
  • Said web, for example, consists of a hydrocolloid material as described herein, which provides adhesion of the web to the patient's wound surrounding skin. Distal is at the said web a cover foil 5 attached (in 1 the adhesive bond possibly used for this purpose is not shown, since it is merely a schematic illustration which is intended to show the layer structure), which shields the wound care article from gas and / or liquid-tight to the outside. In this way, as shown in the other figures, the wound care article can be attached peripherally to the skin in a gastight manner.
  • Said cover film is preferably made of an elastic material, for example egg incision foil. But it can also be made of a non-elastic, possibly plastically deformable material, which yields any volume changes on the inside through-processed bellows, pleats or the like. Such a non-elastic material may be, for example, a thermoforming sheet. The cover foil 5 underlying is a spacer knitted fabric 4 , which provides a padding to the outside.
  • The cover sheet may also consist of two different materials; it can thus be provided that in the peripheral region the covering film consists of a non-elastic material, while in the inner region the covering film consists of an elastic material. Also, in the peripheral region, the cover sheet may be made of an elastic material while being made of a non-elastic material in the inner portion. In some cases it can be ensured that the covering film, on the one hand, yields any changes in volume of the underlying material, for example caused by absorption of wound fluid, while on the other hand a firm hold and a reliably liquid- or gas-tight covering is ensured, or an astringent effect on the wound edge exercisable.
  • In this embodiment it can be provided that the foam element with high restoring forces in its own airtight, in 1 Sheath not shown is enclosed. The foam element can then be placed under vacuum and delivered in a sealed state in evacuated form. After placing the product on the wound can then by opening a in 1 not shown valve - for example, a detachable by means of a drawstring adhesive film - transferred to the wound-facing side of the envelope, the negative pressure on the wound and so a suction effect on possibly existing in the wound base of the wound exudates.
  • Alternatively, in the in 1 be provided embodiment shown that the material acts as a vacuum pump with high restoring force. For this purpose, two valves are required, which in turn 1 not shown. After placing the wound care article on the wound can be evacuated by exerting pressure on the foam element the latter initially via the first valve, and after completion of the pressurization, as in the manner described above via the second valve, the negative pressure transmitted to the wound and so a suction effect exudates may be exerted on any wound base of the wound. For the development of the suction effect again the restoring forces of the foam are responsible.
  • Alternatively, in the in 1 be provided embodiment shown that the foam element is used to adapt the wound care article form fit to the wound base. For this purpose, it may be provided that after attachment of the wound care article to the skin of the patient, the foam element is set by means of a valve, not shown, under vacuum. Since, as shown in the other figures, the wound care article is peripherally attached to the skin in a gastight manner, in this way the foam element is pressed against the wound base and thus establishes contact therewith. In this embodiment, the foam element does not necessarily have a significant suction effect.
  • 1b schematically shows a wound care product in cross-section, which essentially consists of 1a matches, with the difference that the layer 1 from a foam element with high restoring forces of a wrapped absorption body 2.1 having an airlaid lined with superabsorbent polymers. Said absorbent body develops a suction effect on wound fluid, which reacts with the suction effect of the foam element as to 1a described synergistically supplements. Furthermore, said absorption body can for this purpose to make contact with the wound base.
  • 1c schematically shows a wound care product in cross-section, which essentially consists of 1a matches, with the difference that the layer 1 in an airtight shell 18 is introduced. The foam element can by means of a valve 20 placed under vacuum and delivered in a sealed state in evacuated form. After placing the product on the wound can then by opening the valve 19 - here as one using a drawstring 21 removable adhesive film 22 shown on the wound-facing side of the envelope, the negative pressure transmitted to the wound and so a suction effect on possibly existing in the wound base of the wound exudates are exercised.
  • 1d schematically shows a wound care product in cross-section, which essentially consists of 1c corresponds, with the difference, that additionally one in the spacer knitted fabric 4 embedded micro-vacuum pump is provided. In this way, the wound care article according to the invention can also be used for a vacuum therapy, in which the exudates are actively removed from the wound.
  • 2 shows a wound care product in plan view, having the frame already described 6 as well as the band forming the frame 8th , which has adhesive properties, and for example on the side facing the wound a hydrocolloid material, while on the opposite side and an adhesive material is provided that for a connection of the frame, for example, with the in 1 shown cover sheet 6 or the spacer knit 4 provides.
  • 3 also shows a wound care particle in plan view, having the frame already described 6 as well as the band forming the frame 8th , which has adhesive properties. On the side facing away from the wound, the adhesive properties are characterized by a groin closure 17 or by a Velcro fastener 16 guaranteed.
  • 4 shows a pre-evacuated wound care particle as described above with the foam element 1 , the spacer knit 4 , as well as one in the spacer knitted fabric 4 taken in micro vacuum pump 14 , and the valve 19 , The wound care article is over a wound space 21 a patient attached via peripheral adhesive edges. By dissolving the same by means of the tension band, not shown, the negative pressure of the sheath can be transmitted to the wound and thus a suction effect on the wound base, if necessary 3 exudates existing in the wound.
  • 5 shows a foam element consisting of a combined cold foam, in which the middle section 23 has a low density (eg 20 kg / m 3 ), ie it is more area elastic, whereas the lateral sections 22 have a higher density (eg> 60 kg / m 3 ) and therefore have point elasticity. Above the section 23 is a micropump 14 The fact that the underlying portion of the foam element due to its surface elastic training ensures that the pump presses less against the body of the patient. Furthermore, the shows 5 a timer 24 which, for example, in the pump 14 is integrated. The timer can alternatively be placed on or in the foam. With the timer 24 an unillustrated valve is controlled in the pump. For example, the pumping function can be done gradually. The pump can also be operated via a remote control.
  • 6 schematically shows a wound care product in cross-section, which essentially consists of 1 and 5 equivalent. The foam 1 is composed of several parts as in 5 , There is also a depot 30 for drugs, for example, phages, octenidine, quaternary ammonium compounds, silver and other antimicrobial substances. The substances may also be in the foam or on a perforation foil.
  • 7 schematically shows a wound care product in cross-section, which essentially consists of 1b equivalent. A wrapped absorption body 2.1 is in a wound-side recess of the foam element 1 arranged while over the valves 19 , and 26 a negative pressure can be applied.
  • 8th shows a wound care article according to the invention comprising one in the padding layer 4 comprising a spacer fabric, arranged micropump for applying a negative pressure. In this embodiment, the suction effects due to the micropump complement each other 14 in the absorption body 2.1 present superabsorbent polymers and optionally the foam element 1 be exercised, synergistically. As a result, it is possible to operate with lower negative pressures compared to conventional vacuum therapy products (for example with -80 mm Hg instead of -120 mm Hg), resulting in a longer battery life and a reduced operating noise and at the same time the occurrence of negative-pressure side effects, such as for example, ischemia, reduced. Furthermore, in such an embodiment, an external canister for receiving the exudate can be dispensed with,
  • 9 shows a section of an example used foam element that surface side elongated or transverse troughs 28 or surveys 29 which gives it greater flexibility. This facilitates in particular the adaptation to the wound anatomy, for example in the wound base.
  • 10 shows a similar embodiment as 9 However, this time with an openable lid, which is closed gas-tight and can serve as a service hatch for the pump, for example, or an exchange of the foam element 1 or the absorption body 2.1 possible without having to remove the entire wound care article for this purpose.
  • 11 shows a plan view of a wound-facing portion of the shell 18 according to 1c , The cut has circular openings 34.1 and is from a second section 27 backed, which also openings 34.2 having. By moving both sections against each other, a valve function can be exercised by bringing the openings into register (up) or against each other (closed), as described above.
  • QUOTES INCLUDE IN THE DESCRIPTION
  • This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
  • Cited patent literature
    • DE 10252211 [0014]
    • EP 2045287 A1 [0021]
    • WO 03094813 [0063]
    • WO 2007051599 [0063]
    • WO 0152780 [0063]
    • WO 2007118652 [0077]
    • DE 102012100842 [0079]
    • WO 03013976 A1 [0090]
    • EP 2067717 [0093]
    • EP 20014241 B1 [0098]
  • Cited non-patent literature
    • UNI 6349 [0026]
    • DIN 53420 [0026]
    • ISO 1855 [0026]
    • DIN 53577 [0028]
    • UNI 6351 [0028]
    • ISO 3386 [0028]
    • DIN 53576 / B [0030]
    • UNI 6353 [0030]
    • ISO 2439 [0030]
    • DIN 53579-1 [0030]
    • DIN 53572 [0032]
    • UNI 6352 [0032]

Claims (33)

  1. Wound care article comprising a material with high restoring force.
  2. A wound care article according to claim 1, wherein the high recovery material is a foam element.
  3. A wound care article according to claim 2 wherein the foam element comprises a cold foam or viscoelastic foam.
  4. A wound care article according to any one of the preceding claims, wherein the foam element comprises an open cell foam or a mixed cellular foam.
  5. A wound care article according to one of the preceding claims, wherein the material having a high restoring force has a density in the range between ≥ 10 and ≤ 100 kg / m 3 .
  6. A wound care article according to any one of the preceding claims, wherein the high resilience material has a compression hardness in the range of ≥ 1.0 to ≤ 10 kPa.
  7. A wound care article according to any one of the preceding claims, wherein the high resilience material has an indentation hardness in the range of ≥ 50 to ≤ 1000 N.
  8. A wound care article according to any one of the preceding claims, wherein the high resilience material has compression set in the range of ≥ 0 to ≤ 10%.
  9. A wound care article according to any one of the preceding claims, wherein the high resilience material has a thickness of ≥ 10 mm and ≤ 100 mm.
  10. Wound care article according to one of the preceding claims, wherein the material is introduced with a high restoring force in a gas-tight enclosure.
  11. Wound care article according to one of the preceding claims, wherein the foam element is designed evacuatable via a valve.
  12. A wound care article according to any one of the preceding claims, wherein the material is pre-evacuated with high restoring force.
  13. Wound care article according to one of the preceding claims, wherein the material with high restoring force acts as a vacuum pump.
  14. A wound care article according to any one of the preceding claims, further comprising a depot for one or more active agents releasable by pressure or kinking.
  15. A wound care article according to any one of the preceding claims, wherein the high resiliency material is adapted to be evacuated to the wound base of a wound in the patient applied condition of the wound care article in the evacuated state.
  16. A wound care article according to any one of the preceding claims, wherein the high resilience material has incisions, recesses, folds, troughs, bumps or creases which give it greater flexibility.
  17. The wound care article of any one of the preceding claims, wherein the wound care article further comprises a layer of absorbent material.
  18. A wound care article according to any one of the preceding claims, wherein the foam element contains incorporated superabsorbent polymers.
  19. A wound care article according to any one of the preceding claims, wherein the layer of an absorbent material comprises a nonwoven, preferably an airlaid, and / or wherein the absorbent material comprises superabsorbent polymers.
  20. Wound care article according to one of the preceding claims, wherein the layer of the absorbent material is in the form of a sheet-like absorption body
  21. A wound care article according to any one of the preceding claims, wherein the layer of absorbent material is under or over the material with high recovery forces.
  22. A wound care article according to any one of the preceding claims, wherein the layer of absorbent material has punches, incisions, recesses and / or slits. This embodiment ensures that a so-called "gel blocking" formed by the formation of a gel by means of the superabsorbent polymers used is prevented in the layer of the absorbent material, which in turn could possibly prevent the material from being built up by the foam or by any pump Negative pressure continues into the wound region.
  23. Wound care article according to claim 25, wherein the punches, incisions, recesses and / or slots in their shape and arrangement correspond to the shape and arrangement of punches, incisions, recesses and / or slots, which in the absorbent material facing side of the gas-tight enclosure of the material are introduced with high restoring force. In this way, the said "yellow blocking" is particularly effectively prevented. In this case, only one punching, incision, recesses and / or slot may be provided, if in the absorbent material facing side of the gas-tight envelope of the material with high restoring force in each case also only one punch, incision, recesses and / or slot are provided, for example the valve discussed elsewhere herein (possibly with drawstring). Likewise, the shape and arrangement of the punches by the location of corresponding openings in the in 11 be defined wound facing portion of the gas-tight enclosure defined.
  24. A wound care article according to any one of the preceding claims, wherein the layer of absorbent material comprises a sleeve. Incidentally, said casing can likewise have the aforementioned punches, incisions, recesses and / or slots whose shape and arrangement can also be adapted to corresponding punches, incisions, recesses and / or slots on the side of the gastight envelope of the material with high restoring force can.
  25. A wound care article according to any one of the preceding claims, further comprising a wound spacer grid.
  26. A wound care article according to any one of the preceding claims, further comprising a web disposable on the skin of a patient or a support plate disposable on the patient's skin.
  27. A wound care article according to any one of the preceding claims, further comprising an adhesive material for securing it to the skin of a patient.
  28. A wound care article according to any one of the preceding claims, further comprising a vacuum pump.
  29. Use of a wound care article according to one of the preceding claims for the treatment of wounds, in particular wounds having deep-seated edema or incision wounds.
  30. Use of a wound care article according to any preceding claim in a vacuum wound care system.
  31. Absorbent material layer in the form of a sheet-like absorbent body comprising a non-woven, preferably an airlaid, and / or superabsorbent polymers, for use in a wound care article according to one of the preceding claims, wherein the planar absorbent body has punches, incisions, recesses and / or slots. For this embodiment, what has been said above with reference to any gel blocking is analogous.
  32. Absorbent material layer according to claim 29, wherein the punches, incisions, recesses and / or slots correspond in their shape and arrangement to the shape and arrangement of punches, incisions, recesses and / or slots, which in the absorbent material facing side of a gas-tight envelope of the Materials are introduced with high restoring force. For this embodiment, what has been said above with reference to any gel blocking is analogous.
  33. A wound care article according to any one of the preceding claims, wherein the layer of absorbent material comprises a sleeve. Incidentally, said casing can likewise have the aforementioned punches, incisions, recesses and / or slots whose shape and arrangement can also be adapted to corresponding punches, incisions, recesses and / or slots on the side of the gastight envelope of the material with high restoring force can. For this embodiment, what has been said above with reference to any gel blocking is analogous.
DE201420100383 2014-01-29 2014-01-29 Wound care article comprising a material with high restoring force Expired - Lifetime DE202014100383U1 (en)

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PCT/EP2014/078316 WO2015091697A1 (en) 2013-12-17 2014-12-17 Wound care article having a material that has a high restoring force

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US20140330227A1 (en) 2010-03-16 2014-11-06 Kci Licensing, Inc. Delivery-and-fluid-storage bridges for use with reduced-pressure systems
US20150119831A1 (en) 2013-10-30 2015-04-30 Kci Licensing, Inc. Condensate absorbing and dissipating system
EP3294245A4 (en) * 2015-05-08 2018-04-25 KCI Licensing, Inc. Low acuity dressing with integral pump
US10010656B2 (en) 2008-03-05 2018-07-03 Kci Licensing, Inc. Dressing and method for applying reduced pressure to and collecting and storing fluid from a tissue site
US10016544B2 (en) 2013-10-30 2018-07-10 Kci Licensing, Inc. Dressing with differentially sized perforations
US10398604B2 (en) 2014-12-17 2019-09-03 Kci Licensing, Inc. Dressing with offloading capability
US10406266B2 (en) 2014-05-02 2019-09-10 Kci Licensing, Inc. Fluid storage devices, systems, and methods

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US10010656B2 (en) 2008-03-05 2018-07-03 Kci Licensing, Inc. Dressing and method for applying reduced pressure to and collecting and storing fluid from a tissue site
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US20150119831A1 (en) 2013-10-30 2015-04-30 Kci Licensing, Inc. Condensate absorbing and dissipating system
US10016544B2 (en) 2013-10-30 2018-07-10 Kci Licensing, Inc. Dressing with differentially sized perforations
US10398814B2 (en) 2013-10-30 2019-09-03 Kci Licensing, Inc. Condensate absorbing and dissipating system
US10406266B2 (en) 2014-05-02 2019-09-10 Kci Licensing, Inc. Fluid storage devices, systems, and methods
US10398604B2 (en) 2014-12-17 2019-09-03 Kci Licensing, Inc. Dressing with offloading capability
EP3294245A4 (en) * 2015-05-08 2018-04-25 KCI Licensing, Inc. Low acuity dressing with integral pump

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