POROUS POLYMERIC PARTICLE COMPRISING POLYVINYL ALCOHOL AND HAVING INTERIOR TO SURFACE POROSITY-GRADIENT
3 Assignments
0 Petitions
Accused Products
Abstract
Embolic particles, as well as their methods of use and manufacture, are described.
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Citations
54 Claims
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1-31. -31. (canceled)
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32. A composition, comprising:
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a plurality of particles, at least some of the plurality of particles comprising cross-linked polyvinyl alcohol and having a diameter of about 500 microns or less, the at least some of the particles having a first average pore size in an interior region and a second average pore size at a surface region, the first average pore size being greater than the second average pore size; and a carrier fluid, the plurality of particles being in the carrier fluid. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46)
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47. A composition, comprising:
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a plurality of particles, at least some of the plurality of particles comprising polysaccharide and having a diameter of about 500 microns or less, the at least some of the particles having an interior region defining pores and a surface region defining pores, the at least some of the particles having a first density of pores in the interior region and a second density of pores at the surface region, the first density being different from the second density, the at least some of the particles having a first average pore size in the interior region and a second average pore size at the surface region, and the first average pore size being greater than the second average pore size; and a carrier fluid, the plurality of particles being in the carrier fluid. - View Dependent Claims (48, 49, 50, 51, 52, 53, 54)
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Specification