Patent ID: 8071756

Claim:
A polysaccharide pseudo-sponge produced by a crosslinking reaction of a photoreactive polysaccharide obtained by introducing a photoreactive group into a polysaccharide, said polysaccharide pseudo-sponge exhibiting a low swelling property and an enzymatic degradation time which satisfy the following properties (I) and (II), respectively: (I) a swelling ratio of not more than 125% as calculated from the values measured by immersing a test specimen having a thickness of 1 mm, a length of 10 mm and a width of 10 mm, and a solvent content of 96% by weight, in water for injection at room temperature for 1 hour, according to the following formula: Swelling ratio={( S 2 âˆ’S 1)/ S 1}Ã—100 wherein S1 represents an area of the test specimen before the immersion, and S2 is an area of the test specimen after the immersion, in which the area is calculated from the length and width of the test specimen; and (II) an enzymatic degradation time of the polysaccharide pseudo-sponge is not more than 1300 minute as measured by subjecting a test specimen having a thickness of 1 mm, a length of 20 mm and a width of 10 mm, and a solvent content of 96% by weight, to a polysaccharide degrading enzyme in a reaction mixture containing 1 mL of a 5 mmol/L phosphate buffered saline, 0.2 mL of a 1 mmol/L acetate buffer solution and 0.2 mL of a 5TRU (Turbidity Reducing Unit)/mL the enzyme solution at 50Â° C.