Durable swellable hydrogel matrix and methods
First Claim
1. A biocompatible swellable or swollen polymeric matrix comprising first and second polymer-containing segments crosslinked via polymerized groups, wherein the first polymer-containing segment has a linear structure comprising a hydrophilic polymer portion and the second polymer-containing segment has a branched structure comprising hydrophilic polymer portions.
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Abstract
The invention provides biocompatible polymeric hydrogel matrices having excellent durability and swellability. The matrices are formed from a combination of linear and branched hydrophilic macromer compounds. The matrices can be used in association with a medical device or alone. In some methods the polymeric matrix is placed or formed at a target site in which the matrix swells and occludes the target area.
38 Citations
25 Claims
- 1. A biocompatible swellable or swollen polymeric matrix comprising first and second polymer-containing segments crosslinked via polymerized groups, wherein the first polymer-containing segment has a linear structure comprising a hydrophilic polymer portion and the second polymer-containing segment has a branched structure comprising hydrophilic polymer portions.
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20. A method for forming a biocompatible swellable or swollen polymeric matrix comprising steps of:
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(a) providing a composition comprising (i) a first compound having a linear structure comprising a hydrophilic polymer portion and a pendent polymerizable group, and (ii) a second compound having a branched structure comprising oxyalkylene polymer portions and pendent polymerizable groups, and (b) activating the polymerizable groups to cause crosslinking of the first and second compounds and matrix formation. - View Dependent Claims (21, 22, 23)
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Specification