NO152319B - COATING DEVICE BASED ON EASY POLYMERISATES FOR TREATMENT OF THE SKIN - Google Patents

COATING DEVICE BASED ON EASY POLYMERISATES FOR TREATMENT OF THE SKIN Download PDF

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Publication number
NO152319B
NO152319B NO803437A NO803437A NO152319B NO 152319 B NO152319 B NO 152319B NO 803437 A NO803437 A NO 803437A NO 803437 A NO803437 A NO 803437A NO 152319 B NO152319 B NO 152319B
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skin
treatment
polymer
gel
membrane
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NO803437A
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Norwegian (no)
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NO803437L (en
NO152319C (en
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Axel Walch
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Hoechst Ag
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Publication of NO152319C publication Critical patent/NO152319C/en

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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS 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
    • A61L15/00Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/42Use of materials characterised by their function or physical properties
    • A61L15/60Liquid-swellable gel-forming materials, e.g. super-absorbents
    • 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
    • A61F13/00063Accessories for dressings comprising medicaments or additives, e.g. odor control, PH control, debriding, antimicrobic
    • 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
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
    • A61F13/511Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/51121Topsheet, i.e. the permeable cover or layer facing the skin characterised by the 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
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
    • A61F13/511Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/512Topsheet, i.e. the permeable cover or layer facing the skin characterised by its apertures, e.g. perforations
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS 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
    • A61L15/00Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/22Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing macromolecular materials
    • A61L15/26Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives thereof
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS 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
    • A61L15/00Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/42Use of materials characterised by their function or physical properties
    • A61L15/425Porous materials, e.g. foams or sponges
    • 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
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/84Accessories, not otherwise provided for, for absorbent pads
    • A61F13/8405Additives, e.g. for odour, disinfectant or pH control
    • 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
    • A61F2013/00089Wound bandages
    • A61F2013/00157Wound bandages for burns or skin transplants
    • 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
    • A61F2013/00089Wound bandages
    • A61F2013/0017Wound bandages possibility of applying fluid
    • 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
    • A61F2013/00089Wound bandages
    • A61F2013/00182Wound bandages with transparent part
    • 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
    • A61F2013/00089Wound bandages
    • A61F2013/00217Wound bandages not adhering to the wound
    • 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
    • A61F2013/00361Plasters
    • A61F2013/00365Plasters use
    • A61F2013/00519Plasters use for treating burn
    • 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
    • A61F2013/00361Plasters
    • A61F2013/00544Plasters form or structure
    • A61F2013/00574Plasters form or structure shaped as a body part
    • A61F2013/00578Plasters form or structure shaped as a body part conformable; soft or flexible, e.g. elastomeric
    • 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
    • A61F2013/00361Plasters
    • A61F2013/00727Plasters means for wound humidity control
    • A61F2013/00731Plasters means for wound humidity control with absorbing pads
    • A61F2013/0074Plasters means for wound humidity control with absorbing pads containing foams
    • 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
    • A61F2013/00361Plasters
    • A61F2013/00727Plasters means for wound humidity control
    • A61F2013/00731Plasters means for wound humidity control with absorbing pads
    • A61F2013/00744Plasters means for wound humidity control with absorbing pads containing non-woven
    • 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
    • A61F2013/00361Plasters
    • A61F2013/00846Plasters with transparent or translucent part

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  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Public Health (AREA)
  • Engineering & Computer Science (AREA)
  • Veterinary Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Vascular Medicine (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Biomedical Technology (AREA)
  • Hematology (AREA)
  • Materials Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Medicinal Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials For Medical Uses (AREA)
  • Medicinal Preparation (AREA)
  • Fertilizers (AREA)
  • Medicines Containing Plant Substances (AREA)

Abstract

1. Covering device for skin treatment, in particular for the treatment of burns, wounds and skin lesions, comprising a selectively permeable membrane layer with an adjoining watercontaining gel formed from a polymer, wherein a flat membrane tube which is permeable to water vapour and gases and is sealed at its ends and has pores an average size from 3 x 10**-4 to 10 mu m, contains in its cavity a readily deformable and readily flowable mass of a polymer gel, which has a high content of water relative to its total weight.

Description

Oppfinnelsen vedrører en dekkeinnretning på basis av gelaktige polymerisater, til behandling av huden, spesielt ved forbrenninger, sår og huddefekter. The invention relates to a covering device based on gel-like polymers, for treating the skin, especially for burns, wounds and skin defects.

For terapi av storflatede sår, eksempelvis ved tyngre forbrenninger, kreves av dekkematerialet svært mangfoldige delvis mot-satte egenskaper som hittil har vært utilstrekkelig. Således skal dekkematerialet på den ene side være egnet til opptak av sårsekret, på den annen side imidlertid, holde pasiéntens vann- .■ og proteintap lavest mulig. Den skal muliggjøre varme- og gass utvikling, men hindre tilgang av bakterier og virus/a. Den For the therapy of large-surfaced wounds, for example in the case of heavier burns, very diverse, partially opposite properties are required of the covering material, which have so far been insufficient. Thus, on the one hand, the covering material must be suitable for absorbing wound secretions, on the other hand, however, keep the patient's water and protein loss as low as possible. It should enable heat and gas development, but prevent the access of bacteria and viruses. It

skal kunne skiftes mest mulig smertefritt, imidlertid stimulere granuleringen av huden ved hjelp av et fuktig medium, og ved tilførselen muliggjøre en fortynning av sekreter og toksiner. Videre forlanges at medikamenter kan appliseres epicutant. should be able to be changed as painlessly as possible, however, stimulate the granulation of the skin with the help of a moist medium, and when applied enable a dilution of secretions and toxins. It is also required that drugs can be applied epicutaneously.

Derfor anvendes i praksis for sårbehandling eksempelvis ved større forbrenninger, vanligvis naturlig material som svinehud eller autologe transplantater-, riktignok først etter fjerning av nekrotisk vev. Av transplantater er det riktig nok å foretrekke svinehud, imidlertid er de ikke anvendbare i første fase av sårsaniteringen, nemlig til rensning av sårene. Dessute: står de vanligvis ikke til disposisjon i nødvendig mengde. Therefore, in practice, for wound treatment, for example in the case of major burns, natural material such as pig skin or autologous grafts is used, albeit only after removal of necrotic tissue. Of the grafts, it is true enough to prefer pig skin, however, they are not usable in the first phase of wound sanitation, namely for cleaning the wounds. In addition: they are usually not available in the necessary quantity.

Det er også kjent å anvende nettdannede gelaktige polymerisater, dvs. vannholdig polymerisatmasser som f. eks. nettdannet polyacrylamid-gel eller agar-gel til sårbehandling og i dermatologien. Disse polymerisatmasser lar seg imidlertid vanskelig fremstille på kontinuerlig måte i form av sjikt eller folielignende strukturer, og viser dessuten tungtveiende mangler ved klinisk anvendelse, da de er vanskelige å håndtere. It is also known to use net-formed gel-like polymers, i.e. aqueous polymer masses such as e.g. net-formed polyacrylamide gel or agar gel for wound treatment and in dermatology. However, these polymer masses are difficult to produce in a continuous manner in the form of layers or foil-like structures, and also show significant shortcomings in clinical application, as they are difficult to handle.

Oppfinnelsens oppgave er derfor å tilveiebringe et ytterligere forbedret middel på basis av gelaktige polymerisater til behandling av huden, spesielt til behandling av forbrenning, sår, men også huddefekter, og dermatologiske problemer. Fagmannen skal være gitt den mulighet å behandle bestemte hudskader, for hvilke de tidligere dekkeinnretninger er mindre godt egnet. The task of the invention is therefore to provide a further improved agent based on gel-like polymers for the treatment of the skin, especially for the treatment of burns, wounds, but also skin defects and dermatological problems. The expert must be given the opportunity to treat specific skin lesions, for which the previous covering devices are less suitable.

Oppfinnelsen vedrører altså en dekkeinnretning til behandling av hud, spesielt til behandling av hudforbrennelser, sår samt huddefekter, bestående av et selektivt gjennomtrengelig membransjikt med til dette tilgrensende vannholdig gel av polymerisat, idet innretningen er karakterisert ved at den består av en vanndamp- samt gassgjennomtrengelig ,flat, ved sine ender avtettet membranslange med porer av en gjennomsnittlig størr-else på 3 x 10 4 til10 um, hvis hulrom inneholder lett deformerbar samt lett flytbar masse av polymergel inneholdende polymerisater som er valgt av en gruppe omfattende kullhydrater, kullhydratderivater, polyvinylpyrrolidon, polyvinyl-alkoh<p>l, polyacrylsyre, derivater av polyacrylsyre, polymetacrylsyre samt derivater av polymetacrylsyre med i forhold til deres samlede vekt høy vanndel. The invention thus relates to a covering device for treating skin, in particular for treating skin burns, wounds and skin defects, consisting of a selectively permeable membrane layer with an adjacent aqueous gel of polymer, the device being characterized by the fact that it consists of a water vapor and gas permeable, flat membrane tube sealed at its ends with pores of an average size of 3 x 10 4 to 10 µm, the cavity of which contains easily deformable and easily flowable mass of polymer gel containing polymers selected from a group comprising carbohydrates, carbohydrate derivatives, polyvinylpyrrolidone, polyvinyl - alcohol, polyacrylic acid, derivatives of polyacrylic acid, polymethacrylic acid and derivatives of polymethacrylic acid with a high water content in relation to their total weight.

Definisjonsmessig skal det med betegnelsen "gelaktig polymerisat" forstås en forbestandig, lett deformerbar masse av polymerisat, som har en i forhold til sin vekt høy mengde vann. In terms of definition, the term "gel-like polymer" is to be understood as a pre-resistant, easily deformable mass of polymer, which has a high amount of water relative to its weight.

Ytterligere utførelsesformer av innretningen er nevnt i underkravene. Further embodiments of the device are mentioned in the sub-claims.

Membranen, som i det minste delvis dekker den fra huden vendte overflate av polymerisatet, og er vanndamp- og gassgjennomtrengelig er spesielt en membran med en gjennomsnittlig pore-størrelse i området 3 x 10 til 10 pm, og består eksempelvis av celluloseregenerat (DE-AS 27 36 569) eller en asymmetrisk kunststoffmembran av polyamid (DE-AS 51 910) eller polykarbo-nat (DE-OS 25 10 337). Disse membraner ble tidligere anvendt ved dialyse (porestørrelse 10 -3 til 10 -2\ im) eller hemofiltrer-ing, og viser en tykkelse fra 10 til 150 (am. Membranen viser flateaktig form. Det er enten bladformet eller har form som en flateaktig slange, som ved sin ene ende er tettet eller The membrane, which at least partially covers the surface of the polymerizate facing away from the skin, and is permeable to water vapor and gas, is in particular a membrane with an average pore size in the range 3 x 10 to 10 pm, and consists, for example, of regenerated cellulose (DE-AS 27 36 569) or an asymmetric plastic membrane of polyamide (DE-AS 51 910) or polycarbonate (DE-OS 25 10 337). These membranes were previously used in dialysis (pore size 10 -3 to 10 -2 µm) or hemofiltration, and show a thickness from 10 to 150 (µm. The membrane shows a sheet-like shape. It is either sheet-shaped or has the shape of a sheet-like snake, which is sealed at one end or

i lukket, f.eks. i form av en pose som omgir det samlede gelaktigei polymerisatet. in closed, e.g. in the form of a bag that surrounds the overall gel-like polymer.

Hvis membranen bare partielt omhylller det gelaktige polymeri- i sat, er den ikke omhyllede del av det gelaktige polymerisat If the membrane only partially envelops the gel-like polymer, the non-enveloped part of the gel-like polymer is

dekket av en bladformet vevnad eller florstoff, f.eks. av polyetylen-, polyamid-, polyester- eller polypropylenfiber, eller med et åpenporet kunststoffskumsjikt, f.eks. av polyuretan-skum eller med et papir eller en porøs kunststofffilm. covered by a leaf-shaped tissue or flor material, e.g. of polyethylene, polyamide, polyester or polypropylene fibre, or with an open-pore plastic foam layer, e.g. of polyurethane foam or with a paper or a porous plastic film.

Det gelaktige polymerisat er spesielt lett deformerbart resp. flytbart i motsetning til de hittil for sårbehandling anvendte nettdannede polymerisater. Dets ikke av væske bestående del, består f.eks. av en cellulose- eller stivelseseter, spesielt av hydroksyetylcellulose, karboksymetylcellulose eller metylcellulose eller tilsvarende stivelsesderivat. The gel-like polymer is particularly easily deformable or flowable in contrast to the net-formed polymers used for wound treatment up to now. Its non-liquid part consists of e.g. of a cellulose or starch ether, especially of hydroxyethyl cellulose, carboxymethyl cellulose or methyl cellulose or a corresponding starch derivative.

Egnede celluloseetere er videre alkylhydroksyalkyleter, alkyl-karboksymetyleter, hydroksyalkylkarboksymetyleter og alkyl-hydroksyalkylkarboksymetyleter. Suitable cellulose ethers are furthermore alkyl hydroxyalkyl ether, alkyl carboxymethyl ether, hydroxyalkyl carboxymethyl ether and alkyl hydroxyalkyl carboxymethyl ether.

Videre er egnede gelaktig polymerisater, f.eks. geler på basis av acrylsyre og metacrylsyre eller deres derivater, samt polyvinylpyrrolidon, polyvinylalkohol, agar eller agarose. Furthermore, gel-like polymers are suitable, e.g. gels based on acrylic acid and methacrylic acid or their derivatives, as well as polyvinylpyrrolidone, polyvinyl alcohol, agar or agarose.

Det er imidlertid også mulig å anvende kjemisk modifiserte celluloseetere slik de omtales i DE-OS 19 12 740, 23 57 079, 23 58 150 og 25 19 927. Også celluloseetere modifisert med en, to eller treverdig ioneholdige forbindelser er egnede gelaktig polymerisater. However, it is also possible to use chemically modified cellulose ethers as described in DE-OS 19 12 740, 23 57 079, 23 58 150 and 25 19 927. Cellulose ethers modified with mono, di or trivalent ion-containing compounds are also suitable gel-like polymers.

Tykkelsen av det gelaktige polymerisat kan alt etter-anvend-elsesformål variere innen vide grenser og ligger imidlertid hensiktsmessig ved ca. 1 til 5 mm. Ved anvendelse av en inn-retning med et transparent gelaktig polymerisat og en transparent membran til behandling av hudskader, lar helbredelses-prosessen seg fordelaktig følge og kontrollere optisk. The thickness of the gel-like polymer can vary within wide limits depending on the purpose of use and is, however, suitably at approx. 1 to 5 mm. When using a device with a transparent gel-like polymer and a transparent membrane for the treatment of skin damage, the healing process can advantageously be followed and controlled optically.

I en videre utførelsesform står membranen i forbindelse med In a further embodiment, the membrane is in connection with

et reservoir for medikamenter. Dette reservoir dannes f.eks. ved hjelp av en væsketett folie, som dekker membranen, og danner et hulrom med denne. Membranens overflate som grenser til dette hulrom, er likeledes dekket med en væsketett folie med åpninger, eller nominelle bruddsteder, som først åpnes umiddel-bart før dekkeinnretningens anvendelse. I dette hulrom ifylles eksempelvis bakteriedrepende eller terapeutisk virksom oppløs-ning, som gjennom membranen kommer inn i det gelaktige polymerisat/ og dretter treffer hudstedet som skal behandles. Dette reservoir muliggjør således en hurtig fylling og/eller en kontinuerlig etterdosering av væske og medikamenter i dekkeinn-rethingen. Derved styres doseringshastigheten av membranens type og porestørrelse. Det er også mulig å blande det gelaktige polymerisat allerede ved ifylling i en membranslange, ved,den terapeutisk virksomme oppløsning. a reservoir for drugs. This reservoir is formed e.g. by means of a liquid-tight foil, which covers the membrane, and forms a cavity with it. The surface of the membrane bordering this cavity is likewise covered with a liquid-tight foil with openings, or nominal breaking points, which are only opened immediately before the covering device is used. This cavity is filled with, for example, a bactericidal or therapeutically effective solution, which enters the gel-like polymer through the membrane and then hits the skin site to be treated. This reservoir thus enables a quick filling and/or a continuous re-dosing of liquid and medication in the cover-in rething. The dosing rate is thereby controlled by the type and pore size of the membrane. It is also possible to mix the gel-like polymer already when filling in a membrane tube, with the therapeutically effective solution.

Dekkeinnretningen ifølge oppfinnelsen oppfyller de innled-ningsvis nevnte oppgaver. De lar seg videre fremstille på økonomisk måte og er enkle å håndtere i klinisk anvendelse. The covering device according to the invention fulfills the initially mentioned tasks. They can also be manufactured economically and are easy to handle in clinical use.

På figuren vises en utførelsesform i snitt. Den består av en membran i form av en slangepose 1 og et gelaktig polymerisat 2. The figure shows an embodiment in section. It consists of a membrane in the form of a hose bag 1 and a gel-like polymer 2.

i in

Claims (3)

1. Dekkeinnretning til behandling av hud, spesielt til behandling av hudforbrennelser, sår samt huddefekter bestående av et selektivt gjennomtrengelig membransjikt med til dette tilgrensende vannholdig gel av polymerisat, karakterisert ved at den består av en vanndamp- samt gassgjennomtrengelig ,flat, ved sine ender avtettet membranslange med porer av en gjennomsnittlig størrelse på -41. Cover device for the treatment of skin, especially for the treatment of skin burns, wounds and skin defects consisting of a selectively permeable membrane layer with an adjacent aqueous gel of polymer, characterized in that it consists of a water vapor and gas permeable, flat, sealed at its ends membrane tube with pores of an average size of -4 3 x 10 til 10 |im, hvis hulrom inneholder lett deformerbar samt lett flytbar masse av polymergel inneholdende polymerisater som er valgt av en gruppe omfattende kullhydrater, kullhydratderivater, polyvinylpyrrolidon, polyvinylalkohol, polyacrylsyre, derivater av polyacrylsyre, polymetacrylsyre samt derivater av polymetacrylsyre med i forhold til deres samlede vekt høy vanndel.3 x 10 to 10 µm, the cavity of which contains an easily deformable and easily flowable mass of polymer gel containing polymers selected from a group comprising carbohydrates, carbohydrate derivatives, polyvinylpyrrolidone, polyvinyl alcohol, polyacrylic acid, derivatives of polyacrylic acid, polymethacrylic acid and derivatives of polymethacrylic acid with ratios to their total weight high water content. 2. Dekkeinnretning ifølge krav 1, karakterisert ved at den lukkede membranslange er utformet som slangepose.2. Cover device according to claim 1, characterized in that the closed membrane hose is designed as a hose bag. 3. Dekkeinnretning ifølge krav 1 og 2, karakterisert ved at slange samt polymer-gelmasser hver er transparente.3. Cover device according to claims 1 and 2, characterized in that the hose and polymer gel masses are each transparent.
NO803437A 1979-11-17 1980-11-14 COATING DEVICE BASED ON EASY POLYMERISATES FOR TREATMENT OF THE SKIN NO152319C (en)

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DE19792946553 DE2946553A1 (en) 1979-11-17 1979-11-17 COVER DEVICE FOR TREATING THE SKIN BASED ON GELLY POLYMERS

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ATE6344T1 (en) 1984-03-15
EP0031018B1 (en) 1984-02-22
JPS5683355A (en) 1981-07-07
DE3066719D1 (en) 1984-03-29
EP0031018A1 (en) 1981-07-01
DE2946553A1 (en) 1981-05-27
NO803437L (en) 1981-05-18
IE802367L (en) 1981-05-17
IE50513B1 (en) 1986-04-30
NO152319C (en) 1985-09-11

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