Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61F—FILTERS 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
  • A61F13/00—Bandages or dressings; Absorbent pads
  • A61F13/02—Adhesive bandages or dressings
  • A61F13/023—Adhesive bandages or dressings wound covering film layers without a fluid retention layer
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61F—FILTERS 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
  • A61F13/00—Bandages or dressings; Absorbent pads
  • A61F2013/00361—Plasters
  • A61F2013/00855—Plasters pervious to air or vapours
  • A61F2013/00863—Plasters pervious to air or vapours with pores

Definitions

• the invention relates to a dressing material with a gas and water vapor permeable, water impermeable microporous plastic carrier layer and a liquid absorbing layer applied thereon.
• Dressing materials with an at least two-layer structure for the treatment of open wounds have long been known. They generally consist of a dry liquid-absorbing layer, which is to absorb secretions seeping out of the wound, and a second layer, which protrudes beyond the actual wound covering and is usually provided with an adhesive on this protruding portion.
• This second layer is either not water-repellent or, in order to ensure a sufficient supply of oxygen, can be seen with the naked eye and allows moisture to pass through in both directions.
• This passage of moisture can, on the one hand, lead to undesired moistening of the wound upon contact with aqueous solutions from the outside, or, on the other hand, to the passage of blood or wound secretion to the surface of the plaster facing away from the body, so that the clothing or the bed linen is moistened or dirty.
• the liquid transport from the wound to the wound surface causes a loss of moisture in the body tissue in the wound area, which is disadvantageous for healing, particularly in the case of burn wounds.
• the dressing has been soaked with blood or wound secretion, dry on the outside of the base fabric and thus the dressing dries on the wound. When the dressing is removed, the wound is painfully torn open and healing is delayed.
• a dressing material of the type mentioned is described, for example, in DE-AS 21 03 590.
• the water-impermeable backing layer is defined as "a flexible or deformable microporous, neutral film or fabric material" which is impermeable to liquids and bacteria and permeable to gas.
• the liquid-absorbing layer is defined as "any neutral, synthetic, mesh-like, open-cell, solid foam or sponge material" which is intended to "absorb cell debris and liquid exudate”.
• a dressing material with a gas-permeable, water-permeable microporous plastic carrier layer and a liquid-absorbing layer is also known from a company publication by Parke-Davis.
• the top of this dressing material consists of polytetrafluoroethylene film and the bottom of polyurethane foam.
• DE-OS 31 11 336 describes a dressing material with a cover layer made of polytetrafluoroethylene (PTFE) facing the wound.
• PTFE polytetrafluoroethylene
• European patent application 184 392 discloses a water-impermeable, water vapor-permeable material and a method for its production. In this document it is mentioned in very general terms that the material according to the invention could also be used for medical purposes, but without further construction, quality or use. application is received.
• this object is achieved in that the liquid-absorbing layer (2) is impregnated with water or an aqueous solution.
• Such a dressing material has the essential advantage over the dressing materials that have been commercially available up to now that the gas-permeable membrane allows air to be exchanged between the body area covered by the dressing material and the surroundings.
• the liquid-absorbing layer (2) of the dressing material is already impregnated with liquid.
• “Soaking” means that the liquid-absorbing material "should have absorbed as much liquid as possible” (Duden, dictionary of meanings, Ciscos Institut Mannheim, Vienna, Zurich, 1970).
• moist permanent compresses are already known from DE-GM 258 336, it is a two-layer dressing material whose outer layer is permeable to moisture and air. This leads to a moist chamber in the covered body area, which is extremely harmful, for example, for the healing of attacked skin.
• the dressing material according to the invention can advantageously be used, depending on the type of liquid applied, for the treatment of, for example, abrasions or burns; furthermore it also fulfills the Functions of a moist envelope, for example in the treatment of inflammatory processes, in pain relief from complaints caused by hematomas or other injuries, etc.
• a particular advantage in this connection is that the membrane's microporosity means that there is a constant temperature exchange between the covered area ⁇ rich and outside environment takes place. As a result, overheating of the covered area is avoided and beneficial, uniform cooling to room temperature is achieved.
• the liquid-absorbing layer (2) can, for example, be impregnated with a solution of acetic acid clay, camomile or arnica extracts or solutions with antibiotic or antimycotic substances. The latter is particularly advantageous when treating open wounds or burn injuries.
• the plastic carrier layer (1) should preferably have a pore size of 0.45 to 2 ⁇ m, preferably 1 ⁇ m. This pore size allows free passage of gases, while drop-shaped moisture does not pass due to the excessive surface tension. Since the plastic carrier layer (1) according to the invention should also have a certain flexibility in order to be able to adapt to the body contours in the respective application area, it has a thickness of 0.4 to 1 mm, preferably 0.55 to 0, 65 mm.
• the dressing material can be composed of any water-impermeable plastic carrier layer, which is permeable and microporous for gas and water vapor, and any liquid-absorbing layer.
• a layer made of polytetrafluoroethylene as the plastic carrier layer (1). Materials which consist of stretched polytetrafluoroethylene and which ensure a uniform distribution of pores of approximately the same size are particularly preferred.
• the material according to the invention is characterized by high biocompatibility.
• it is tearproof, which is particularly useful when used in places where it is exposed to certain loads, such as joints.
• the liquid-absorbing layer (2) of the dressing material according to the invention can be any liquid-absorbing layer known from the prior art.
• - Games for such liquid-absorbing layers are, for example, cellulose gauze layers or cotton gauze layers.
• the dressing material according to the invention is provided in the form of a self-adhesive cover.
• This embodiment provides that the water-impermeable plastic carrier layer (1) protrudes on two or more sides over the liquid-absorbing layer (2), the projecting surfaces of the plastic carrier layer being coated with a skin-compatible adhesive (3).
• a dressing material prepared in this way is therefore self-adhesive.
• Conventional adhesives can be used as skin-compatible adhesives, e.g. a mixture of natural rubber, zinc oxide, resin and lanolin or of phthalate resin, polyvinyl ether dispersions and acrylic copolymers. Any other skin-compatible adhesive can also be used.
• skin-compatible adhesive e.g. a mixture of natural rubber, zinc oxide, resin and lanolin or of phthalate resin, polyvinyl ether dispersions and acrylic copolymers. Any other skin-compatible adhesive can also be used.
• the dressing material In the treatment of internal inflammatory processes, e.g. Gastritis or when cooling painful swellings, it is not necessary for the dressing material to be sterile. For the treatment of open wounds or burns, however, the provision of sterile packaged dressing material according to the invention is preferred.
• the dressing material according to the invention is used in very different sizes.
• the moisture-absorbing layer has a size of 0.25 to 1 cm 2 and can also be in the form of a circle; for pain relief, for example
• gastritis bandages are useful, the moisture-absorbing layer of which covers the entire abdominal surface.
• the width of the protruding surface of the plastic carrier layer corresponds in each case to the requirements and is, for example, about 0.5 to 1 cm in the case of the small round dressings mentioned above, but in larger cases 15, 20 in extreme cases even 30 cm or more.
• FIG. 1 shows an embodiment of the dressing material according to the invention in cross section.
• FIG. 1 shows an embodiment of the dressing material according to the invention in cross section.
• a burn caused deliberately under medical supervision by applying a metal band of approx. 0.8 x 2.5 cm heated to 800 to 900 ° C was treated with a bandage according to the invention in which the moisture-absorbing layer consisted of gauze soaked in distilled water. No pain was felt even after the local anesthesia applied before the combustion had abated.
• the dressing material was removed after 17 hours and the completely irritation-free wound was protected with a normal plaster for a further 24 hours. After this 24 hour period, the wound was no longer in need of protection.

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• Health & Medical Sciences (AREA)
• Engineering & Computer Science (AREA)
• Biomedical Technology (AREA)
• Heart & Thoracic Surgery (AREA)
• Vascular Medicine (AREA)
• Life Sciences & Earth Sciences (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Materials For Medical Uses (AREA)

Priority Applications (1)

Applications Claiming Priority (1)

Publications (1)

Family

ID=6345735

Family Applications (1)

Country Status (5)

Cited By (5)

Families Citing this family (10)

Citations (4)

Family Cites Families (1)

• 1988
  • 1988-01-21 DE DE3801722A patent/DE3801722C1/de not_active Expired
• 1989
  • 1989-07-17 ES ES198989908171T patent/ES2039952T3/es not_active Expired - Lifetime
  • 1989-07-17 AT AT89908171T patent/ATE87816T1/de not_active IP Right Cessation
  • 1989-07-17 EP EP89113098A patent/EP0410009A1/de active Pending
  • 1989-07-17 EP EP89908171A patent/EP0485374B1/de not_active Revoked
  • 1989-07-17 WO PCT/EP1989/000833 patent/WO1991001122A1/de not_active Ceased

Patent Citations (4)

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