| 主权项 |
1. A vascular stent, comprising:
a stent body comprising a biocompatible, biodegradable block copolymer having a structural block and a fluorescent block; or a stent body comprising a biocompatible, biodegradable block copolymer having a block with a Tg higher than 37° C. and a block having a Tg lower than room temperature, wherein the block with the Tg lower than room temperature forms a discrete amorphous phase within a matrix formed by the block with the Tg higher than 37° C., wherein a fluorescent substance is dispersed in the amorphous phase; or a stent body comprising a biocompatible, biodegradable semi-crystalline homopolymer having a Tg higher than 37° C., wherein a fluorescent substance is dispersed in the amorphous phase of the semi-crystalline polymer; or a stent body comprising a blend of at least two biocompatible, biodegradable polymers wherein on of the polymers is a semi-crystalline homopolymer and the other polymer is a copolymer, the blend of the two polymers having a Tg higher than 37° C. and wherein a fluorescent substance is dispersed in an amorphous phase of the blend; or a stent body comprising a biocompatible, biodegradable polymer wherein the stent body is coated with a layer comprising a biocompatible, biodegradable block copolymer having a structural block and a fluorescent block; or a biocompatible, biodegradable block copolymer having a block with a Tg higher than 37° C. and a block having a Tg lower than room temperature, wherein the block with the Tg lower than room temperature forms a discrete amorphous phase within a crystalline or semi-crystalline matrix formed by the block with the Tg higher than 37° C., wherein a fluorescent substance is dispersed in the amorphous phase. |
