Non-occulusive adhesive patch for applying medication to the ski

Details Non-occulusive adhesive patch for applying medication to the ski Non-occulusive adhesive patch for applying medication to the ski

1994-03-30

1996-07-16

Green, Randall L.

Surgery

Means for introducing or removing material from body for...

Treating material applied to or removed from external...

424449, 424447, 604304, 314953, 314965, 602 48, A61F 1300

Patent

active

055362630

ABSTRACT:
A non-occlusive medication patch to be applied to the skin includes a porous self-supporting backing layer to give the patch the required integrity and strength by acting as a supporting framework for other components, and a flexible hydrophilic pressure-sensitive adhesive reservoir comprising a hydrocolloidal gel for the sustained release of medication to be absorbed topically through the skin into the body of a patient. The reservoir has two portions: first, an external coating layer with an exposed lower skin-contacting surface that forms a pressure-sensitive bond with the skin, and second, an upper internal portion which infiltrates the porous backing and becomes solidified therein after being applied so that the reservoir and the backing are unified, enabling the backing itself to act as a storage location for the medication-containing reservoir. The medication within the reservoir migrates over time from within the backing through the lower coating layer and passes through the skin to provide sustained release of the medication into the body of a patient. The reservoir comprises a hydrocolloidal dispersion of a natural or synthetic gel-forming polymer, a hydrophilic adhesive, a hydrophilic humectant and a biomedically active medication, i.e., a medicament, dispersed throughout the reservoir including both the external portion and the internal portion that infiltrates the porous backing.

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