Dermal substance collection device
First Claim
1. A gelled composition for the collection of a chemical substance from a dermal surface, said gelled composition consisting essentially of:
- (a) A binding reservoir material, having a particle size in the colloid range, for binding with said dermal substance to prevent back transfer loss of said dermal substance from said binding reservoir to the dermal surface; and
(b) A liquid bridge transfer medium which comprises an aqueous gel that allows the instantaneous and continuous transfer of said dermal substance from the dermal surface to said binding reservoir material being maintained in a wet-state by said liquid bridge transfer medium.
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Abstract
A dermal substance collection device (DSCD) is described which provides ms for the non-invasive, instantaneous and continuous monitoring of chemical substances which are present in a detectable amount in either or both interstitial fluid or sweat or which are on or in the skin. The transdermal substance collection device of this invention is comprised of three essential components: (1) a substance binding reservoir, wettable by (2) a liquid transfer medium which allows for liquid bridge transfer of a soluble substance from the skin surface to the binding reservoir by virtue of its wettability by the liquid, and (3) an occlusive cover.
90 Citations
13 Claims
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1. A gelled composition for the collection of a chemical substance from a dermal surface, said gelled composition consisting essentially of:
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(a) A binding reservoir material, having a particle size in the colloid range, for binding with said dermal substance to prevent back transfer loss of said dermal substance from said binding reservoir to the dermal surface; and (b) A liquid bridge transfer medium which comprises an aqueous gel that allows the instantaneous and continuous transfer of said dermal substance from the dermal surface to said binding reservoir material being maintained in a wet-state by said liquid bridge transfer medium. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification