Abstract:
Abstract of the disclosure A coated assembly with an inductance of from about 0.1 to about 5 nanohenries and a capacitance of from about 0.1 to about 10 nanofarads. The coated assembly contains a stent and a coating. When the assembly is exposed to radio frequency electromagnetic radiation with a frequency of from 10 megahertz to about 200 megahertz, at least 90 percent of the electromagnetic radiation penetrates to the interior of the stent.
Abstract:
Disclosed in this specification is a stent coated with a layer comprised of particulates which have an average particle size of less than 100 nanometers; a saturation magnetization of at least 2,000 gauss; and where the average coherence length between the particulates is from about 1 nanometer to about 50 nanometers.
Abstract:
A cylindrical sputtering target (40) including a cylinder of a first material (42) wherein the inner wall (48) of the cylinder has embedded within it a pattern of small pieces (44) of one or more different materials (46, 52, 54), whereby such target produces a spatially and compositionally uniform coating on a substrate (30) in a cylindrical sputtering process. The molar ratio of the multiple materials in the coating composition is influenced by the size, shape, and geometrical pattern of the material pieces embedded in the inner cylinder wall.
Abstract:
An implantable medical device comprised of a lumen with a volume of from about 1 x 10 -7 cubic meters to 1 x 10 -5 cubic meters wherein, when said device is exposed to radio frequency electromagnetic radiation with a frequency of from 10 megahertz to about 200 megahertz, at least 90 percent of the electromagnetic radiation penetrates to the lumen of the device, and the concentration of the electromagnetic radiation that penetrates to the lumen of the device is substantially identical at different points within such lumen. When the device is, at different points in time, exposed to two different radio frequency electromagnetic radiations, one of whose frequencies differs from the other by a factor of at least 1.5, at least 90 percent of each of the radio frequency electromagnetic radiations penetrates to the lumen of the device.
Abstract:
A passive resonant circuit is disposed on an implanted stent. The materials, geomentry and electrical parameters of the stent with passive resonant circuit are chosen and arranged so that incident electromagnetic radiation induces currents in the passive resonant circuit that optimize imageability during MR scanning.
Abstract:
A coated assembly comprised of a coating that has a relative magnetic permeability of at least 1.1 over the range of frequencies of from about 10 megahertz to about 200 megahertz, an increase of such relative magnetic permeability over such range of from about 1 x 10-14 to about 1 x 10-6 per hertz, and a magnetization, when measured at a direct current magnetic field of 2 Tesla, of from about 0.1 to about 10 electromagnetic units per cubic centimeter.
Abstract:
A nanoelectrical material with an average particle size of less than 100 nanometers, a surface area to volume ration of from about 0.1 to about 0.05 l/nanometer, and a relative dielectric constant of less than about 1.5, and a chemical/biological sensor comprising such material.
Abstract:
An implantable medical assembly that contains a substrate, and nanomagnetic material and a therapeutic agent located over the substrate. A barrier is located between the therapeutic agent and biological material. When the assembly is exposed to electromagnetic radiation, the barrier between the biological material and the therapeutic agent is removed.
Abstract:
An implantable medical device that contains two coating layers disposed above at least one of its surfaces. The first coating layer contains a biologically active material; and the second coating layer contains a polymeric material and nanomagnetic material disposed on the first coating layer; the second coating layer is substantially free of the biologically active material. The nanomagnetic material has a saturation magnetization of from about 2 to about 3000 electromagnetic units per cubic centimeter, and it contains nanomagnetic particles with an average particle size of less than about 100 nanometers; the average coherence length between adjacent nanomagnetic particles is less than 100 nanometers.
Abstract:
An implantable medical device comprised of a lumen. When the device is, at different points in time, exposed to two different radio frequency electromagnetic radiations, one of whose frequencies differs from the other by a factor of at least 1.5, at least 90 percent of each of the radio frequency electromagnetic radiations penetrates to the lumen of the device.