Device for delivery of a substance

A device for delivering a substance in situ in a body, comprising:

• (a) at least one permeable expandable container having a first dimension and a second dimension and containing at least one expandable particle comprising a swellable material capable of expanding when contacted with a fluid;
• (b) at least one substance-holding container containing the substance to be delivered;
• and
• (c) at least one coupling member for coupling the at least one permeable expandable container and the at least one substance holding container to form a single unit;
• whereby when the device is positioned in situ, bodily fluid permeates the at least one permeable expandable container causing the at least one expandable particle contained therein to swell and the at least one permeable expandable container to expand from the first dimension to the second dimension so that the device remains in situ for a period of time sufficient to achieve the desired delivery of the substance.

A device for delivering a substance in situ in a body, comprising:

• (a) a carrier having at least one interior compartment
• (b) at least one permeable expandable container having a first dimension and a second dimension releasably attached to the carrier by a coupling member;
• and
• (c) at least one expandable particle comprising a swellable material contained within the container and capable of expanding when contacted with a fluid;
• whereby when the device is positioned in situ, bodily fluid permeates the at least one permeable expandable container causing the at least one expandable particle contained therein to swell and the at least one permeable expandable container to expand from the first dimension to the second dimension so that the device remains in situ for a period of time sufficient to achieve the desired delivery of the substance.