Ostomy sealing washer

Claim 2

An ostomy-sealing washer adapted to fit over an intestinal stoma for use with a postsurgical drainage pouch comprising a pliable, resiliently flexible, elastoplastic flat body having an aperture therethrough, said body having a modulud of elasticity from about 1,000 to 30,000 dynes per square centimeter, said body having a water-activatable adhesive on one surface, said adhesive becoming water insoluble upon activation and being hypoallergenic to the human skin, said washer aperture being smaller than the stoma the washer is to fit, said washer being capable of tenacious adherence to the human skin by its adhesive surface and to a drainage pouch by its other surface, thereby preventing intestinal drainage onto the human skin.

Claim 3

An ostomy-sealing washer adapted to fit over an intestinal stoma for use with a postsurgical drainage pouch comprising an elastoplastic, oil-extended block copolymer flat body having an aperture therethrough, said body having a water-activatable adhesive on one side which becomes water insoluble upon activation and being hypoallergenic to the human skin, said washer aperture being slightly smaller than said stoma the washer is to fit, said washer being capable of tenacious adherence to the human skin by its adhesive surface and to a drainage pouch by its other surface, thereby preventing intestinal drainage onto the human skin.

Claim 4

An ostomy-sealing washer adapted to fit over an intestinal stoma for use with a postsurgical drainage pouch comprising an elastoplastic, oil-extended block copolymer flat body having an aperture therethrough, said body having a water-activatable adhesive on one side which becomes water insoluble upon activation and being hypoallergenic to the human skin, said washer aperture being slightly smaller than said stoma the washer is to fit, said washer being capable of tenacious adherence to the human skin by its adhesive surface and to a drainage pouch by its other surface, thereby preventing intestinal drainage onto the human skin.

Claim 5

The ostomy-sealing washer of claim 2 wherein said block copolymer is a styrene-butadiene block copolymer and said oil is mineral oil.

Claim 6

The ostomy-sealing washer of claim 2 wherein said water activatable adhesive comprises a mixture of a polyacid powder and metal acid powder.

Claim 7

The ostomy-sealing washer of claim 2 wherein said oil-extended block copolymer comprises about one part copolymer extended with from about 4 to 12 parts oil.

Claim 8

An ostomy-sealing washer adapted to fit over an intestinal stoma for use with a postsurgical drainage pouch and comprising a first flat layer of an elastoplastic oil-extended block copolymer consisting essentially of 6 parts styrene-butadiene blOck copolymer extended with 4 parts mineral oil and a second flat layer of elastoplastic oil-extended block copolymer comprising 1 part of styrene-isoprene block copolymer extended with 8 parts mineral oil, said first and second layers being bonded at their interface, said second layer having a water-activatable adhesive of powdered ethylene maleic acid and powdered zinc oxide thereon, said washer having an aperture therethrough sufficient to be expanded over said stoma and, upon recovery after expansion, sufficiently elastic to fit snugly around said stoma, said washer being capable of tenacious adherence to the human skin by its adhesive surface and to a drainage pouch by its other surface, thereby preventing intestinal drainage onto the human skin.

Claim 9

An ostomy-sealing washer adapted to fit over an intestinal stoma for use with a postsurgical drainage pouch and comprising a first flat layer of an elastoplastic oil-extended block copolymer consisting essentially of 6 parts styrene-butadiene blOck copolymer extended with 4 parts mineral oil and a second flat layer of elastoplastic oil-extended block copolymer comprising 1 part of styrene-isoprene block copolymer extended with 8 parts mineral oil, said first and second layers being bonded at their interface, said second layer having a water-activatable adhesive of powdered ethylene maleic acid and powdered zinc oxide thereon, said washer having an aperture therethrough sufficient to be expanded over said stoma and, upon recovery after expansion, sufficiently elastic to fit snugly around said stoma, said washer being capable of tenacious adherence to the human skin by its adhesive surface and to a drainage pouch by its other surface, thereby preventing intestinal drainage onto the human skin.

Claim 10

The washer of claim 7 wherein said first and second layers comprise a styrene-isoprene-styrene block copolymer.

Claim 11

The washer of claim 7 wherein said first and second layers comprise a styrene-butadiene-styrene block copolymer.

Claim 12

The ostomy seal of claim 7 wherein said adhesive comprises a mixture of 5 parts powdered ethylene maleic acid to 1 part powdered zinc oxide.

Claim 13

The ostomy seal of claim 7 wherein said styrene-isoprene block copolymer has a molecular weight of about 120,000 to 160, 000 and a modulus of elasticity of about 4,000 dynes per square centimeter.

Claim 14

The ostomy-sealing washer of claim 2 wherein said block copolymer is a styrene-isoprene block copolymer and said oil is mineral oil.