Laminated sheets for use in a fully retrievable occlusion device
First Claim
Patent Images
1. An occlusion device that is fully retrievable, the occlusion device comprising:
- a center post;
first and second fixation devices connected to the center post, the first and second fixation devices comprising a plurality of stranded wire support arms;
first and second reinforced sheets attached to the first and second fixation devices, respectively; and
end caps located at the tips of each arm and wherein the reinforced sheets comprise layers of polyvinyl alcohol foam laminated together.
1 Assignment
0 Petitions
Accused Products
Abstract
An occlusion device having laminated polyvinyl alcohol sheets for occluding a defect. The laminated polyvinyl alcohol sheets provide an increased tear strength to the sheets that allows the device to be fully retrievable through the same catheter used to deploy it. The laminated sheets are created by obtaining thin sheets of polyvinyl alcohol foam, arranging the sheets on one another, and applying heat and pressure to laminate the sheets together.
121 Citations
19 Claims
-
1. An occlusion device that is fully retrievable, the occlusion device comprising:
-
a center post;
first and second fixation devices connected to the center post, the first and second fixation devices comprising a plurality of stranded wire support arms;
first and second reinforced sheets attached to the first and second fixation devices, respectively; and
end caps located at the tips of each arm and wherein the reinforced sheets comprise layers of polyvinyl alcohol foam laminated together. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. The occlusion device that is fully retrievable through the same catheter used to deploy the occlusion device, the occlusion device comprising:
-
a support frame comprising stranded wire arms; and
a sheet connected to the support frame;
wherein the sheet is reinforced to have a tear strength high enough to prevent the sheet from tearing off the support frame when the occlusion device is withdrawn into the catheter and wherein the sheet is formed of polyvinyl alcohol foam and wherein the tear strength of the sheet is provided by laminating two layers of polyvinyl alcohol foam together to form a two-ply area on the sheet. - View Dependent Claims (10, 11, 12, 13, 14)
-
-
15. An improved occlusion device, the occlusion device comprising:
-
a center post;
first and second fixation devices connected to the center post;
first and second sheets attached to the first and second fixation devices, respectively, wherein the first and second sheets comprise multiple layers of polyvinyl alcohol foam laminated together to form a multi-ply area on the sheets. - View Dependent Claims (16, 17, 18, 19)
-
Specification