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WO2021209950A1 - Pansement à feuille superabsorbante perforée - Google Patents

Pansement à feuille superabsorbante perforée Download PDF

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Publication number
WO2021209950A1
WO2021209950A1 PCT/IB2021/053123 IB2021053123W WO2021209950A1 WO 2021209950 A1 WO2021209950 A1 WO 2021209950A1 IB 2021053123 W IB2021053123 W IB 2021053123W WO 2021209950 A1 WO2021209950 A1 WO 2021209950A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
substrate layer
dressing
fluid
superabsorbent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/IB2021/053123
Other languages
English (en)
Inventor
Christopher Brian Locke
Timothy Mark Robinson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KCI Licensing Inc
Original Assignee
KCI Licensing Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by KCI Licensing Inc filed Critical KCI Licensing Inc
Publication of WO2021209950A1 publication Critical patent/WO2021209950A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • A61F13/0276—Apparatus or processes for manufacturing adhesive dressings or bandages
    • A61F13/0289—Apparatus or processes for manufacturing adhesive dressings or bandages manufacturing of adhesive dressings
    • 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
    • A61F13/0203—Adhesive bandages or dressings with fluid retention members
    • A61F13/0206—Adhesive bandages or dressings with fluid retention members with absorbent fibrous layers, e.g. woven or non-woven absorbent pads or island dressings
    • A61F13/0209—Adhesive bandages or dressings with fluid retention members with absorbent fibrous layers, e.g. woven or non-woven absorbent pads or island dressings comprising superabsorbent material

Definitions

  • the sealant is water soluble.
  • the sealant may include polyvinyl pyrrohdone.
  • the sealant includes a first film sealed to a second film at the borders of the plurality of open channels.
  • FIG. 4 is a first schematic illustration of layers of the dressing of FIG. 1, according to an exemplary embodiment.
  • FIG. 7 is a top view of the superabsorbent structure of the dressing of FIG. 6, according to an exemplary embodiment.
  • the first wicking layer 104 is thereby configured to improve the comfort of the dressing 100 for a patient. In some embodiments, the first wicking layer 104 is omitted.
  • the first wicking layer 104 includes a first side 118 and a second side 120 opposite the first side 118.
  • FIG. 2 an assembled isometric view of the dressing 100 is shown, according to an exemplary embodiments.
  • the drape 102 and the wound contact layer 110 are visible, with the first wicking layer 104, the hydrophilic foam layer 105, the superabsorbent structure 106 and the second wicking layer 108 assembled in the form of a “tea-bag” or pouch and contained between the drape 102 and the wound contact layer 110.
  • the superabsorbent structure 106 includes a first nonwoven layer 402 and a second nonwoven layer 406.
  • the first nonwoven layer 402 may include a nonwoven textile material and may be configured to provide lateral wicking of fluid.
  • the second nonwoven layer 406 may include a nonwoven textile material and may be configured to provide lateral wicking of fluid.
  • the superabsorbent structure 106 also includes a first adhesive layer 404 disposed on a side of the first nonwoven layer 402 and a second adhesive layer 508 positioned on a side of the second nonwoven layer 406.
  • the first adhesive layer 404 faces the second adhesive layer 408.
  • the first adhesive layer 404 and the second adhesive layer 408 may include a PVA adhesive.
  • the connector 610 is fluidly coupled to a negative-pressure source 612 via a conduit 616.
  • a water-soluble coating is provided.
  • the water-soluble coating may include a stabilizing material, for example sugar, sodium salt of carboxyymethyl cellulose, or a water-soluble polymer such as polyvinyl alcohol (PVOH), polyvinyl pyrrolidone (PVP), or polyethylene oxides (PEO).
  • PVOH polyvinyl alcohol
  • PVP polyvinyl pyrrolidone
  • PEO polyethylene oxides
  • the superabsorbent structure 106 can be coated, printed, or sprayed with a solution containing the stabilizing material.
  • an organic solvent e.g., ketones, alcohols
  • PVP polyvinyl pyrrolidone
  • PEO polyethylene oxides
  • the composite layer is integrated into a dressing.
  • the composite layer may be coupled to and/or positioned within a pocket formed by an external drape layer and a wound contact layer.
  • the composite layer is combined with various other layers and materials to form a dressing consistent with the embodiments of FIGS. 1-6.
  • the composite layer may be used in various specialty dressings.
  • the composite layer is provided in a dressing shaped to match an extremity of a patient (e.g., hand, foot, amputation stump).
  • the dressing may also be coupled to or otherwise grouped with other components of a negative pressure wound therapy system at step 918 (e.g., conduit, off-dressing fluid collector, negative pressure source).
  • the superabsorbent polymer is printed as a slurry onto a substrate layer, for example a non-woven wicking layer.
  • the slurry may include an adhesive to help bind the superabsorbent polymer to the non-woven wicking layer.
  • the slurry can distributed in a patern that leaves areas of the substrate free of the slurry, for example such that channels are left through the superabsorbent slurry. Such channels can be arranged, shaped, and size as described above with reference to Fig. 7.
  • the slurry may include water, alcohol (or water soluble organic solvent), and a water soluble polymer such as PVP or PVOH.
  • multiple superabsorbent structures can be used, for example arranged in a stack.
  • the channels in the multiple superabsorbent structures are aligned.
  • in the multiple superabsorbent structures are offset (e.g., partially overlapping, not overlapping), for example to mediate the flow of fluid across the set of superabsorbent structures.
  • Various combinations of multiple superabsorbent structures can be included to achieve desired fluid handling properties for a dressing.

Landscapes

  • 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)
  • Manufacturing & Machinery (AREA)
  • Materials For Medical Uses (AREA)

Abstract

L'invention concerne un procédé de fabrication d'un pansement comprenant la fourniture d'une première couche de substrat, la distribution de particules superabsorbantes sur un premier côté de la première couche de substrat, l'accouplement d'une seconde couche de substrat au premier côté de la première couche de substrat de telle sorte que les particules superabsorbantes soient positionnées entre la première couche de substrat et la seconde couche de substrat, la création d'une pluralité de trous à travers la première couche de substrat et la seconde couche de substrat, et le recouvrement des bords de la pluralité de trous à l'aide d'un agent d'étanchéité conçu pour empêcher le mouvement des particules superabsorbantes dans la pluralité de trous.
PCT/IB2021/053123 2020-04-16 2021-04-15 Pansement à feuille superabsorbante perforée Ceased WO2021209950A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202063010762P 2020-04-16 2020-04-16
US63/010,762 2020-04-16

Publications (1)

Publication Number Publication Date
WO2021209950A1 true WO2021209950A1 (fr) 2021-10-21

Family

ID=75639935

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2021/053123 Ceased WO2021209950A1 (fr) 2020-04-16 2021-04-15 Pansement à feuille superabsorbante perforée

Country Status (1)

Country Link
WO (1) WO2021209950A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024100409A1 (fr) * 2022-11-10 2024-05-16 Convatec Limited Pansement

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170209312A1 (en) * 2016-01-22 2017-07-27 Covidien Lp Absorbent articles including silicone

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170209312A1 (en) * 2016-01-22 2017-07-27 Covidien Lp Absorbent articles including silicone

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024100409A1 (fr) * 2022-11-10 2024-05-16 Convatec Limited Pansement

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