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Journal of Biomaterials Applications
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Testing Intelligent Wound Dressings

Shashi Palamand

Calgon Vestal Laboratories 7501 Page Avenue Box 147 St. Louis, MO 63166

Andrew M. Reed

PolyMedica Industries 4080 Youngfield Street Wheat Ridge, CO 80033

Ludwig J. Weimann

Bertek Inc. 110 Lake Street St. Albans, VT 05478

While occlusive wound dressings help provide patients with moist wound healing to reduce pain and increase reepithelialization rate, the moisture vapor transmission rate (MVTR) of these dressings remains constant even though wound exudate levels may vary with time and from wound to wound. The clinician is therefore faced with exudate buildup in heavily exuding wounds and desiccation in lightly exuding wounds-a situation requiring frequent patient monitoring and dressing changes.

Am "intelligent" wound dressing would have the ability to automatically respond to a wound's exudate level by self-adjusting its MVTR to maintain a constant moist wound environment. Such a dressing could help ensure that exudate buildup or wound desiccation is reduced or avoided.

Three commercial wound dressings (hydrocolloid, thin film, and membrane laminate) were studied for their ability to alter their MVTR in response to varying moisture level. An efficient test methodology and experimental design was developed, which involved direct and indirect fluid contact with the dressings using two temperatures and two test methods.

One dressing, a membrane laminate, was found to exhibit intelligent MVTR behavior. Data is presented which shows this dressing's ability to adjust its MVTR nearly eight-fold as a function of hydration level. Information regarding the mechanism of action of this intelligent dressing is also presented.

Journal of Biomaterials Applications, Vol. 6, No. 3, 198-215 (1992)
DOI: 10.1177/088532829200600302
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