GB2435422A - Slow release agent absorbent dressing - Google Patents

Slow release agent absorbent dressing Download PDF

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Publication number
GB2435422A
GB2435422A GB0603481A GB0603481A GB2435422A GB 2435422 A GB2435422 A GB 2435422A GB 0603481 A GB0603481 A GB 0603481A GB 0603481 A GB0603481 A GB 0603481A GB 2435422 A GB2435422 A GB 2435422A
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GB
United Kingdom
Prior art keywords
layer
wound
absorbent
exudate
dressing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB0603481A
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GB0603481D0 (en
Inventor
Chou Chang-Tsung
Shih Chia-Ju
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Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB0603481A priority Critical patent/GB2435422A/en
Publication of GB0603481D0 publication Critical patent/GB0603481D0/en
Publication of GB2435422A publication Critical patent/GB2435422A/en
Withdrawn legal-status Critical Current

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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
    • A61F13/00051—Accessories for dressings
    • A61F13/00063—Accessories for dressings comprising medicaments or additives, e.g. odor control, PH control, debriding, antimicrobic
    • 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
    • A61F13/01—Non-adhesive bandages or dressings
    • A61F13/01021—Non-adhesive bandages or dressings characterised by the structure of the dressing
    • A61F13/01029—Non-adhesive bandages or dressings characterised by the structure of the dressing made of multiple layers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/42—Use of materials characterised by their function or physical properties
    • A61L15/60—Liquid-swellable gel-forming materials, e.g. super-absorbents
    • 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
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent 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 absorbing medium
    • A61F13/534—Absorbent 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 absorbing medium having an inhomogeneous composition through the thickness of the pad
    • A61F13/537—Absorbent 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 absorbing medium having an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking 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
    • A61F2013/00089—Wound bandages
    • A61F2013/00157—Wound bandages for burns or skin transplants
    • 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
    • A61F2013/00089—Wound bandages
    • A61F2013/00182—Wound bandages with transparent part
    • 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
    • A61F2013/00089—Wound bandages
    • A61F2013/00217—Wound bandages not adhering to the wound
    • 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
    • A61F2013/00089—Wound bandages
    • A61F2013/00217—Wound bandages not adhering to the wound
    • A61F2013/00229—Wound bandages not adhering to the wound with alginate
    • 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
    • A61F2013/00089—Wound bandages
    • A61F2013/00246—Wound bandages in a special way pervious to air or vapours
    • A61F2013/00251—Wound bandages in a special way pervious to air or vapours with macroscopic openings
    • 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
    • A61F2013/00089—Wound bandages
    • A61F2013/00246—Wound bandages in a special way pervious to air or vapours
    • A61F2013/00255—Wound bandages in a special way pervious to air or vapours with pores
    • 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
    • A61F2013/00365—Plasters use
    • A61F2013/00519—Plasters use for treating burn
    • A61F2013/00523—Plasters use for treating burn with hydrogel
    • 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
    • A61F2013/00365—Plasters use
    • A61F2013/0054—Plasters use for deep wounds
    • 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
    • A61F2013/00544—Plasters form or structure
    • A61F2013/00604—Multilayer
    • 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
    • A61F2013/00727—Plasters means for wound humidity control
    • A61F2013/00731—Plasters means for wound humidity control with absorbing pads
    • A61F2013/00744—Plasters means for wound humidity control with absorbing pads containing non-woven
    • 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
    • A61F2013/00846—Plasters with transparent or translucent part
    • 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
    • A61F2013/00859—Plasters pervious to air or vapours with macroscopic openings
    • 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
    • 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
    • A61F2013/00902—Plasters containing means
    • A61F2013/0091—Plasters containing means with disinfecting or anaesthetics means, e.g. anti-mycrobic
    • 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
    • A61F2013/00902—Plasters containing means
    • A61F2013/00927—Plasters containing means with biological activity, e.g. enzymes for debriding wounds or others, collagen or growth factors

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

Abstract

A slow release agent absorbent dressing (1) comprises a wound-contacting layer (2) having tapered apertures (7). The tapered apertures (7) contact a wound to discharge exudate therefrom and transmit exudate, via a guiding layer (3), to an absorbent layer (4) formed of high-molecular polymeric fibres and mixed with a certain concentration of water-soluble agents (10), such as an antiseptic agent, enzyme and/or growth factor agent, in a suitable amount. After exudate has entered the absorbent layer (4), the polymeric fibres expand to form into a gel to prevent exudate flowing back to the wound. Also, a translucent evaporating layer (5) having numerous micropores (9) for air venting, is in contact with the absorbent layer (4) and the peripheral edges are joined together in the form of a sealed structure by heat-sealing (6), to stop side escape of exudate, which is effective in protecting the wound (11) from secondary infection.

Description

<p>SLOW RELEASE AGENT ABSORBENT DRESSING</p>
<p>DES CR1 PT ION The present invention relates to a slow release agent absorbent dressing and more particularly to a wound-contracting layer with tapered apertures wherein exudate discharges from a wound area is able to penetrate through to prevent from the backf low of exudate and avoid infecting the wound area. Also, mix a certain concentration of water-soluble antiseptic agents, enzymes and growth factor agents in a suitable amount into a dry absorbent layer of the dressing of the present invention, which is more effective in infection control, debridement and promoting healing.</p>
<p>Almost every healing process generally used in medical institution are necessarily using antimicrobial dressings to cover or bandage a wound in order to prevent from infection by external bacteria and the wound is possible to be the laceration, surgical incision, inflammation or burns. In addition, most commonly used dressings in the medical institution are still gauze or cotton wad. However, these dressings are effective in absorbing exudate while directly applied on the wound but exudate might flow backward to infect the wound or said absorbed exudate might evaporate to make gauze become harder; in that case, a healing process could be hindered by causing a secondary injury.</p>
<p>Besides, U.S, Patent No. 6, 600,085 discloses an absorbent article made from an inner core of absorbent material surrounded by a top layer and a bottom layer which are apertured films. Obviously, said absorbent article comprises only three layers, namely a top layer, a bottom layer and an absorbent core. The structure of this prior art article is different from the structure of the present invention. Also, although the prior art discloses a bottom layer using protuberances to prevent backf low of exudate, it does not contemplate a layer to disperse exudate, thereby increasing its absorbing capabilities, in that a guiding layer is provided in the present invention, which can overcome this disadvantage.</p>
<p>U.S. Patent No. 6, 333, 093 discloses a wound dressing in which an anti-microbial coating can be appied on one or more of the layers of the dressing in order to provide an anti-microbial effect to limit infection. In the present invention, however, the concept of providing water-soluble agents to flow back to the wound area and a guiding layer as a fourth layer, between other layers, to enhance and optimize the passage of exudate from the wound area to the absorbent layer, is a new skill not contemplated by</p>
<p>the prior art.</p>
<p>The main object of the present invention is to provide a slow release agent absorbent dressing; more particularly to provide a wound-contacting layer formed of a one-way porous film with tapered apertures for discharging exudate from a wound area and transmitting exudate via a guiding layer to an absorbent layer to prevent backf low and also a certain concentration or water-soluble agents mixed into a dry absorbent layer. This certain concentration is determined by the saturation capacity of the absorbent layer. After the absorbent layer absorbs discharged exudate to become in a saturated state, the certain concentration of dissolved agents will release through the porous film of the wound-contacting layer and flow back to the wound area, which achieves the effect of producing bacteria static, lysis of necrotic tissue and even promoting granulation growth.</p>
<p>In order that the invention can be more fully understood, a preferred embodiment in accordance therewith will now be described by way of example and with reference to the accompanying drawing in which: Figure 1 is an enlarged cross-sectional view of the present embodiment of the slow release agent absorbent dressing; and Figure 2 is a perspective view of the present embodiment of the slow release agent absorbent dressing.</p>
<p>Referring to Figure 1 and Figure 2, a slow release agent absorbent dressing 1 of the present invention comprises a wound- contacting layer 2, a guiding layer 3, an absorbent layer 4 and an evaporating layer 5. The placement of the above layers is one on top of another in order and the peripheral edges are joined together by heat-sealing, as at 6.</p>
<p>The slow release agent absorbent dressing 1 has various sizes in accordance with the different size of a wound.</p>
<p>The wound-contacting layer 2 comprises a porous soft-film which is covered with tapered apertures 7 and which can be a non-adherent polyethylene film or other similar material. The tapered apertures 7 can be polygonal tapered or conical shaped apertures. The larger calibre bottom areas of the tapered apertures 7 contacting a wound 11, as shown in Figure 2, produce a one-way valve, such that discharged exudate from the wound 11 is able to penetrate through the numerous tapered apertures 7.</p>
<p>Discharged exudate is transmitted via the guiding layer 3 to the absorbent layer 4 forming it into a gel to prevent backf low of exudate.</p>
<p>The absorbent layer 4 is formed of high-molecule polymeric materials, such as polyester or algin, mixed with a certain concentration of water-soluble agents which can be antiseptic agents, enzymes and/or growth factor agents in a suitable amount which has been added to a dry absorbent layer.</p>
<p>This certain concentration is determined by the saturation capacity of the absorbent layer 4 after the absorbent layer 4 absorbs discharged exudate and becomes in a saturated state. The certain concentration of dissolved agent(s) 10 will flow back to the wound area 11, which achieves the effect of infection control.</p>
<p>Therefore, as the absorbent layer 4 is mixed with antiseptic agents, the dressing 1 has the function of being bacteria static. As the absorbent layer 4 is mixed with enzymes, the dressing 1 has the function of lysis of necrotic tissue and debridment and, as the absorbent layer 4 is mixed with growth factor agents, the dressing 1 has the function of promoting granulation growth.</p>
<p>In the present embodiment, the wound-contacting layer 2 comprises a soft-film covered with tapered apertures 7. Besides having the advantage of producing a one-way valve for discharging exudate, it does not adhere to the wound 11. For this reason, the dressing 1 is removed easily without hurting newborn epidermis.</p>
<p>As shown in Figure 1 and Figure 2, the guiding layer 3, joined to the wound-contacting layer 2, can be directional fine-hole fibres or non-woven fabrics for transmitting discharged exudate to the absorbent layer 4.</p>
<p>The absorbent layer 4, attached to the guiding layer 3, is in the form of high-molecule polymeric materials, such as polyester or algin. After absorbing discharged exudate, these high-molecule polymeric fibres expand forming a gel to prevent exudate flowing back to the wound area 11.</p>
<p>The absorbent layer 4 has added to it the certain concentration of agents 10 in a suitable amount to absorb discharged exudate. These agents 10 can be antiseptic agents, enzymes and/or growth factor agents.</p>
<p>After nearing a saturated state, the certain concentration of dissolved agents 10 will flow back to the wound area 11.</p>
<p>In the present embodiment, non-woven pulp and high-molecule polymeric fibres antiseptically treated are used.</p>
<p>The evaporating layer 5 adjacent the absorbent layer 4, comprises a translucent or transparent film 12 with a broad spread of micro pores 9 to keep the wound area 11 in suitable moisture. Also people can observe the absorbing condition of the dressing 1 through the evaporating layer 5.</p>

Claims (1)

  1. <p>CLJ.IMS 1. A slow release agent absorbent dressing comprising: a
    wound-contacting layer formed of a soft-film and having tapered apertures; a guiding layer attached the wound-contacting layer and formed of directional fine-hole fibres or non-woven fabrics; an absorbent layer which is attached to the guiding layer, is formed of high-molecule polymeric materials, and is capable of absorbing exudate discharged from a wound to which the dressing is applied in use; and an evaporating layer attached to the absorbent layer and having a translucent film and micropores for venting air, to keep the wound in suitable moisture, wherein the guiding layer is arranged to disperse exudate from the wound-contacting layer to the absorbent layer is a substantially uniform manner to increase the absorbency of the absorbent layer, thereby preventing exudate captured by the absorbent layer from passing back to the wound.</p>
    <p>2. A slow release agent absorbent dressing as claimed in claim 1 further comprising a certain concentration of water-soluble agent mixed into the absorbent layer and based upon the saturation capacity of the absorbent layer.</p>
    <p>3. A slow release agent absorbent dressing as claimed in claim 2, wherein the certain concentration of water-soluble agent comprises an antiseptic agent, an enzyme and/or a growth factor agent.</p>
    <p>4. A slow release agent absorbent dressing substantially as hereinbefore described with reference to the accompanying drawing.</p>
GB0603481A 2006-02-22 2006-02-22 Slow release agent absorbent dressing Withdrawn GB2435422A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0603481A GB2435422A (en) 2006-02-22 2006-02-22 Slow release agent absorbent dressing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0603481A GB2435422A (en) 2006-02-22 2006-02-22 Slow release agent absorbent dressing

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GB0603481D0 GB0603481D0 (en) 2006-04-05
GB2435422A true GB2435422A (en) 2007-08-29

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Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBA20120029A1 (en) * 2012-05-08 2013-11-09 Chia-Chun Tien ANTISEPTIC MATERIAL WITH A HIGH ABSORPTION OIL ABSORPTION CAPACITY
US8715256B2 (en) 2007-11-21 2014-05-06 Smith & Nephew Plc Vacuum assisted wound dressing
US8829263B2 (en) 2005-09-07 2014-09-09 Smith & Nephew, Inc. Self contained wound dressing with micropump
US9061095B2 (en) 2010-04-27 2015-06-23 Smith & Nephew Plc Wound dressing and method of use
US9227000B2 (en) 2006-09-28 2016-01-05 Smith & Nephew, Inc. Portable wound therapy system
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