摘要:
Disclosed are nondegradable hydrogels used to coat or form at least a portion of a medical device. The hydrogels may be formed from functionalized PEG based macromers. These hydrogels are easy to sterilize, transport and store. Methods of forming these hydrogels as described herein are included.
摘要:
A percutaneous stented valve delivery device including an inner shaft, a sheath, and a delivery capsule. The sheath slidably receives the inner shaft. A capsule proximal zone is attached to the sheath. A capsule distal zone is configured to transition between normal and flared states. A diameter of the distal zone is greater in the flared state, and the capsule includes a shape memory component that naturally assumes the normal state. The device is operable to perform a reversible partial deployment procedure in which a portion of the prosthesis is exposed distal the capsule and allowed to radially expand. Subsequently, with distal advancement of the capsule, the distal zone transitions to the flared state and imparts a collapsing force onto the prosthesis, causing the prosthesis to radially collapse and become recaptured within the delivery capsule. The capsule can include a laser cut tube encapsulated by a polymer.
摘要:
Disclosed herein are implantable medical devices having controlled release biodegradable polymer coatings thereon wherein the polymer is formed from ring opening of γ-butyrolactone and at least one additional monomer selected from the group consisting of trimethylene carbonate, lactide, polyethylene glycol, glycolide, the monomers formed from ring opening of ε-caprolactone, 4-tert-butyl caprolactone, and N-acetyl caprolactone, and combinations thereof, and at least one drug releasable from the biodegradable polymer. Also disclosed are implantable medical devices form of the biodegradable polymers and processes for forming the polymers.
摘要:
The present disclosure generally relates to implantable medical devices having a metallic surface coated with a bioabsorbable primer polymer layer under a bioabsorbable drug polymer layer. Thus, in addition to the degradation of the drug polymer layer, there is degradation of the primer layer. The underlying metallic framework may or may not degrade depending on whether bioabsorbable or biostable metals are chosen.
摘要:
Provided herein are implantable medical devices comprising a biodegradable multiblock copolymer comprising at least three blocks; wherein the at least three blocks includes at least one inner block and two end blocks; further wherein each of the at least one inner block comprises monomers selected from the group consisting of e-caprolactone, r-butylactone, trimethylene carbonate, caprolactone derivatives, P-Dioxanone, and combinations thereof; and further wherein each of the end blocks comprises monomers selected from the group consisting of l-lactide, D-lactide, glycolide, L,D-lactide, and combinations thereof.
摘要:
Disclosed herein are implantable medical devices having controlled release biodegradable polymer coatings thereon wherein the polymer is formed from ring opening of γ-butyrolactone and at least one additional monomer selected from the group consisting of trimethylene carbonate, lactide, polyethylene glycol, glycolide, the monomers formed from ring opening of ε-caprolactone, 4-tert-butyl caprolactone, and N-acetyl caprolactone, and combinations thereof, and at least one drug releasable from the biodegradable polymer. Also disclosed are implantable medical devices form of the biodegradable polymers and processes for forming the polymers.
摘要:
Disclosed are methods for forming adhesive hydrogels on tissue surfaces comprising applying to a first tissue surface at a treatment site a first mixture comprising at least one photosensitive molecule and at least one initiator, exposing the first tissue surface to light having a wavelength sufficient to activate the photosensitive molecule to form an activated tissue surface, applying to the activated tissue surface or to a second surface a second mixture comprising at least one macromer, at least one cross-linking agent, and at least one initiator and contacting the first tissue surface with the second surface thus adhering the first tissue surface to the second surface through macromer cross-linking and resulting adhesive hydrogel formation.
摘要:
Disclosed herein are biodegradable modified caprolactone polymers for coating and forming medical devices. The properties of the polymers are fine tuned for optimal performance depending on the medical purpose. Moreover, the polymers are suitable for the controlled in situ release of drugs at the treatment site.
摘要:
Implantable medical devices having a metallic surface coated with a bioabsorbable primer polymer layer under a bioabsorbable drug polymer layer. Thus, in addition to the degradation of the drug polymer layer, there is degradation of the primer layer. The underlying metallic framework may or may not degrade depending on whether bioabsorbable or biostable metals are chosen.
摘要:
Disclosed in the present invention are biodegradable biocompatible amphiphilic copolymers for coating and manufacturing medical devices. The properties of the polymers in the present invention are fine tuned for optimal performance depending on the medical purpose. Moreover, the polymers of the present invention retain and release bioactive drugs in a controlled manner.