dressing materials

dressing materials

Table 1 and Box 1
Table 1: Types of wound dressings and indications for their use
Dressing TypeFeaturesIndicated Use
Primary Wound-Dressing Films
Semi-permeable adhesive filmNon-absorbent
Non-adherent to wound surface
Gas and water vapour permeable, but impermeable to water
Non-shedding
Transparent, allowing observation of wound
Low exudating wounds
Perforated film, absorbentLow adherence (absorbent pad covered by perforated film)
Low exudating wounds
Low-adherent Wound Contact Layers
Unmedicated viscoseNon-absorbent; non-sheddingNon-adherent primary dressing
Medicated tulleLow-adherent polyethylene glycol or paraffin impregnated tulle incorporating an antiseptic (e.g.: chlorhexidine gluconate; iodine)Topical antisepsis
Semi-permeable hydrogelsHydrophilic polymers in either sheet or amorphous formulations
Highly absorbent
Gas permeable, but impermeable to water
Dressing surface may dry out, and thus requires rehydration with saline
Removal of slough
Rehydration of dry, necrotic tissue to allow its later sharp debridement
Absorption of heavy exudation
Carrier of topical antimicrobials (e.g.: metronidazole)
HydrocolloidsInteractive (form a gel when in contact with wound surface)
Usually formulated with an occlusive, water-repellent backing
Promote an acidic and hypoxic wound environment, and facilitates neoangiogenesis
Not suitable for infected wounds
Maintain a moist, temperature controlled wound environment
AlginatesSeaweed derivatives which form a hydrophilic gel in contact with the wound surface
Require irrigation to remove from wound surface
Absorption of exudation
Moisten with saline before application
Polyurethane foamsSmooth low-adherent wound contact layer backed with hydrophobic foam
Highly gas-permeable
Maintain a moist wound environment and good thermal insulation
Absorption of moderate exudation
Outer layer prevents 'strike through'
Silver agentsSilver ions impregnated into dressing
Antibacterial action
Topical antisepsis, including resistant forms
Box 1: Properties of an 'ideal' wound dressing
  • Removal and absorption of exudate to prevent maceration of tissues and growth of wound contaminants and microorganisms, and prevent 'strike-through'

  • Maintenance of correct levels of humidity at the wound surface in order to encourage keratinocyte migration across the wound surface

  • Gaseous permeability to allow correct oxygen levels within the wound; high oxygen levels promote keratinocyte function; relative hypoxia promotes neoangiogenesis and macrophage function, and reduces pain

  • Impermeable to microorganisms, by the prevention of 'strike-through'

  • Maintenance of the correct tissue pH; oxygen dissociates from haemoglobin, and neoangiogenesis is stimulated at acidic (i.e. <7.4) pH levels

  • Maintenance of the correct temperature, in order to promote fibroblast and keratinocyte division, and thereby promote healing; the wound takes up to 3 hours to regain its pre-dressing rate of cell mitosis, and a 10°C fall in wound temperature reduces oxygen dissociation from oxyhaemoglobin

  • Low adherence, so that newly formed tissues are not disrupted during dressing changes; 'wet to dry' dressings cause considerable tissue damage when the dressing is changed

  • Non-contaminating, in order to prevent shedding of the dressing fibres into the wound; shed fibres can cause foreign-body and toxic reactions

  • Ease of application

  • Comfortable in situ, and well conforming to the wound site

References in periodicals archive ?
Contract award notice: Delivery of dressing materials, No.
The scientists conclude that this membrane "is of great potential in fabricating dressing materials for rapid wound healing, as well as other biomaterials, such as membrane for capturing circulating tumor cells, bone growth and constructing neural networks.
3) Several new dressing materials have been marketed and are frequently used.
In cooperation with fabric producers, Kree was instrumental in the establishment of various fabric adhesive dressing materials.
Contract award notice: Supply of dressing materials.
Contract award notice:Supply of medical consumables and dressing materials.
The dressing materials are detailed in the technical specification.
Contract notice: Delivery of dressing materials for the needs of university hospital st.
1: purchase and supply of dressing materials, hereafter called the Terms of Reference: a commodity for the Independent Public Healthcare Regional Hospital to them.
Contract award notice: cyclical supply of dressing materials for the needs of the district hospital in stalowa wola in the period of one year from the date of signing the contract.
The contract is for the supply of dressing materials for a period of 12 months.
Contract notice: Supply of medicines , dressing materials and pharmaceutical raw materials.