Magnetically modulated polymeric drug release system
First Claim
1. A method of administering a biologically active substance to an animal, e.g., a human, said method comprisingpreparing an implant for said animal of a medically responsive composition in the form of a body sized and shaped for placement in the environment of use, said environment including an aqueous fluid, said body comprising, in admixture, a first phase comprising a biocompatible, plastically deformable, polymeric matrix, said polymeric matrix being insoluble in the environment of use, a second phase comprising a biologically active substance distributed throughout said matrix to be released to said aqueous fluid outside said matrix, and a third phase comprising a magnetically responsive substance encapsulated within said matrix so that, upon exposure of said body to an oscillating magnetic field, the rate of release of said biologically active substance to said aqueous fluid is increased,in order to subject said body in said animal to an oscillating magnetic field which creates sufficient disturbance to increase the rate of release of said biologically active substance.
0 Assignments
0 Petitions
Accused Products
Abstract
A magnetically responsive composition for the modulated, sustained administration of a biologically active substance, the composition being in the form of a body sized and shaped for placement in the environment of use, the environment including an aqueous fluid, the body comprising, in admixture, a first phase comprising a biocompatible, plastically deformable, polymeric matrix, the polymeric matrix being insoluble in the environment of use, a second phase having a biologically active substance distributed throughout the matrix to be released to the aqueous fluid outside the matrix, and a third phase comprising a magnetically responsive substance encapsulated within the matrix so that, upon exposure of the body to an oscillating magnetic field, the rate of release of the biologically active substance to the aqueous fluid is increased.
-
Citations
15 Claims
-
1. A method of administering a biologically active substance to an animal, e.g., a human, said method comprising
preparing an implant for said animal of a medically responsive composition in the form of a body sized and shaped for placement in the environment of use, said environment including an aqueous fluid, said body comprising, in admixture, a first phase comprising a biocompatible, plastically deformable, polymeric matrix, said polymeric matrix being insoluble in the environment of use, a second phase comprising a biologically active substance distributed throughout said matrix to be released to said aqueous fluid outside said matrix, and a third phase comprising a magnetically responsive substance encapsulated within said matrix so that, upon exposure of said body to an oscillating magnetic field, the rate of release of said biologically active substance to said aqueous fluid is increased, in order to subject said body in said animal to an oscillating magnetic field which creates sufficient disturbance to increase the rate of release of said biologically active substance.
Specification