摘要:
Chemical erosion drug delivery systems are provided that allow sustained release of therapeutic agents within a treated area for a prolonged period of time.
摘要:
Polymeric compositions have photochromic and blue-light filtering ability and are useful in the manufacture of ophthalmic medical devices. The polymeric compositions comprise a photochromic material incorporated into polymeric host materials and are activatable by blue light having a first wavelength range to become photochromic, and are thereby capable of absorbing blue light in a second wavelength range. Methods of making the compositions comprise incorporating a photochromic material into a polymeric host material.
摘要:
A radiation-absorbing polymeric material comprises units of a polymerizable UV-absorbing compound and a monomer, and is capable of absorbing UV radiation, and at least about 50 percent of light having wavelengths in the range from about 400 nm to about 425 nm. The radiation-absorbing polymeric material can further comprise units of a crosslinking agent. Ophthalmic devices, such as contact lenses, corneal rings, corneal inlays, keratoprostheses, and intraocular lenses, are made from such polymeric material.
摘要:
A method for making an ocular drug delivery device involves subjecting the device to a supercritical fluid to remove contaminants from the device. The supercritical fluid includes supercritical carbon dioxide. The contaminants include unreacted monomers or oligomers present in the polymeric material used to form the device.
摘要:
Polymeric compositions have photochromic and blue-light filtering ability and are useful in the manufacture of ophthalmic medical devices. The polymeric compositions comprise a photochromic material incorporated into polymeric host materials and are activatable by blue light having a first wavelength range to become photochromic, and are thereby capable of absorbing blue light in a second wavelength range. Methods of making the compositions comprise incorporating a photochromic material into a polymeric host material.
摘要:
A drug delivery device for placement in the eye includes a drug core comprising a pharmaceutically active agent, and a holder that holds the drug core. The holder is made of a material impermeable to passage of the active agent and includes an opening for passage of the pharmaceutically agent therethrough to eye tissue. The device includes a layer of material permeable to passage of the active agent. The device further includes a disc of impermeable material disposed between the drug core and the opening in the holder.
摘要:
A star macromonomer comprises multiple side chains attached to a nucleus, each side chain having at least a segment comprising hydrophobic units and at least a segment comprising hydrophilic units. Polymeric materials having improved oxygen permeability and water and ion transport rates are produced by polymerizing compositions comprising such a star macromonomer. Such polymeric materials are desirable for producing medical devices, such as ophthalmic devices.
摘要:
A contact lens package includes a sealed receptacle containing a contact lens immersed in a sterile solution. The contact lens is made of a silicone hydrogel copolymer, and the solution includes a stabilizing agent in an amount effective to inhibit changes in physical properties of the silicone hydrogel copolymer.
摘要:
The present invention relates to polymeric compositions useful in the manufacture of biocompatible medical devices. More particularly, the present invention relates to certain cationic monomers capable of polymerization to form polymeric compositions having desirable physical characteristics useful in the manufacture of ophthalmic devices. Such properties include the ability to extract the polymerized medical devices with water. This avoids the use of organic solvents as is typical in the art. The polymer compositions comprise polymerized silicon-containing monomers end-capped with polymerizable cationic hydrophilic groups.
摘要:
A surface-modified medical device comprises a hydrophilic coating that comprises units of a hydrophilic monomer and a coupling agent that has coupling functional groups, at least a portion of which is coupled to the surface functional groups of the medical device. A method for producing such a surface-modified medical device comprises forming the hydrophilic coating by coupling units of the hydrophilic monomer to the medical device through the coupling agent. Medical devices, such as stents, implants, catheters, and ophthalmic devices, are included.