摘要:
The invention relates to a process for production of a composite material having antimicrobial activity, having the following steps: provision of a metal powder produced from a metal having antimicrobial activity, wherein the metal powder is formed from discrete agglomerates having a porosity of 30 to 98%, wherein the agglomerates have a spongy structure formed by solid material bridges; melting a thermoplastic and setting a predetermined viscosity; mixing the metal powder with the molten thermoplastic in a predetermined quantitative ratio; and cooling the mixture, wherein the metal powder is firmly bound to a matrix formed by the plastic.
摘要:
The present invention relates generally to intravascular catheters for performing medical procedures. An intravascular catheter is disclosed comprising a shaft, the shaft comprising an inner liner having a distal end, a distal tip; a second layer disposed over the inner liner, the second layer extending from the proximal end of the shaft to a distal terminus; a third layer disposed over the second layer; and a fourth layer disposed over the third layer, the fourth layer including a proximal end and a distal end. In addition, a method of manufacturing a catheter according to a preferred embodiment of the invention is disclosed.
摘要:
The present invention provides various novel matrix-supported texaphyrins in which a polymeric or solid matrix is covalently modified by the addition of one or more texaphyrins or texaphyrin derivatives. Described are methods of making various polymer-supported texaphyrins, including texaphyrin chromatographic supports, and devices such as catheters, as may be used, for example, in the separation of neutral and anionic species and in applications concerning phosphate ester hydrolysis, other catalytic schemes, MRI, and PDT.
摘要:
A dilatation balloon and catheter for insertion into a bodily conduit. The catheter (10) includes shaft (12) and a dilatation balloon (24) at the distal end of the shaft. The balloon is inflated via a central lumen (14) in the shaft for delivery of a fluid inflation media. The balloon is fabricated from a combination of a thermoplastic elastomer (TPE), preferably an engineering thermoplastic elastomer (ETE), with a non-compliant structural polymeric material. The combination may be a blend of the non-compliant structural polymer and the TPE. Alternatively, the combination may be a layered balloon having, for example, a non-compliant structural polymer inner layer and a soft, abrasion resistant, elastomeric outer layer. Methods for fabricating the balloon from the combination of a TPE and a non-compliant structural polymer are also disclosed.
摘要:
Medical devices configured for implantation or insertion into a subject, which contain one or more particle-containing region that comprises electrically aligned, elongated particles within a matrix. Also described are methods for forming the same.
摘要:
Provided herein are coated medical devices. More specifically, at least a portion of the device (e.g., catheter) is coated with an active component, wherein the active component prevents or treats occlusions and the formation(s) thereof.
摘要:
Balloon catheter covers are elastic fabric structures of interconnected yarns, the structure having a high degree of stretch and recovery in the circumferential direction with little change in dimension in the longitudinal direction during multiple pressurization cycles over full range of inflation and deflation of the balloon catheter. The covers have longitudinal yarns positioned at about zero degrees to the balloon axis and reversibly-stretchable, circumferential yarns positioned at a high angle Ø to the axis. A method for making the balloon catheter covers allowing nearly orthogonal placement of circumferential and longitudinal yarns involves triaxial braiding a minimum number of elastomeric braid yarns with multiple axial yarns to provide maximum convergence angle (approaching 90 degrees).
摘要:
Improved medical device have an inorganic substrate and a polymer covering at least a portion of the substrate, in which the polymer forms a structure substantially different form the structure of the substrate. Other medical devices include a flexible composite component with an inorganic substrate and a polymer covering at least over a portion of the substrate. The flexible composite component can be bent, at least, about 100 degrees without extending the material beyond its elastic limit. Corresponding methods include applying a polymer onto an inorganic substrate, such that the polymer does not conform to the shape of the substrate.
摘要:
A medical balloon composed of a micro-composite material which provides for radial expansion of a balloon to a predetermined extent, but which has minimal longitudinal growth during balloon inflation. The micro-composite material includes a fibril component, a matrix component,and optionally, a compatibilizer. The fibril component may preferably be liquid crystal polymer fibers randomly scattered through out the balloon material. The liquid crystal polymers are created by extrusion at high speed. An alternative fibril component may be PET fibers which are uniformly spaced about the balloon material and extend through out the length of the balloon material tube.