Patent ID: 7776352

Claim:
A kit for providing a vinyl polymer hydrogel to a region of interest via injection of an injectable thetagel solution, wherein the kit comprises: (A) a delivery device comprising (i) a first chamber that can contain a first solution comprising polyvinyl alcohol (PVA), wherein the first solution has a Flory interaction parameter (chi value) that is not sufficient for gelation, and (ii) a second chamber that can contain a second solution to be combined with the first solution, wherein combining the first and second solutions will result in an injectable thetagel solution that has a Flory interaction parameter (chi value) that is sufficient for gelation; (B) the first solution; (C) PVA; and (D) the second solution, wherein the delivery device when filled with the first solution and the second solution provides after injection of the injectable thetagel solution using the delivery device, a polymer hydrogel forms that has physical crosslinks between PVA molecules, wherein the polymer hydrogel is formed without chemical crosslinkers, irradiation or thermal cycling, and wherein the polymer hydrogel can fill the region.