摘要:
A stent includes a strut formed into a cylindrical shape and extending in an axial direction. The strut includes outer peripheral portions extending around the axial and circumferential directions of the cylindrical shape. The outer peripheral portions are spaced apart from one another with gaps formed between adjacent outer peripheral portions. The strut includes a connection portion connecting the outer peripheral portions to each other in one of the gaps formed by the adjacent outer peripheral portions. The outer peripheral portions and the connection portion of the strut are integrally formed of a biodegradable polymer A portion of the strut includes a fragile portion which is snore fragile than other portions of the strut.
摘要:
A prosthesis is disclosed for placement at an Os opening from a main body lumen to a branch body lumen. The prosthesis includes a radially expansible support at one end, a circumferentially extending link at the other end and at least one frond extending axially therebetween. The support is configured to be deployed in the branch body lumen, with the circumferentially extending link in the main lumen and the frond extendable across the Os.
摘要:
In embodiments there is described a cardiovascular tube-shaped lockable and expandable bioabsorbable scaffold having a low immunogenicity manufactured from a crystallizable bioabsorbable polymer composition or blend.
摘要:
Articles-of-manufacturing comprising an object having a surface and at least a first layer of a first therapeutically active agent being deposited onto at least a continuous portion of the surface, wherein at least 50 weight percents of the first layer is the first therapeutically active agent in a crystalline form are disclosed. Methods utilizing such articles-of-manufacturing for treating medical conditions are also disclosed. Processes of preparing the articles-of-manufacturing by contacting a surface of the object with a solution containing the therapeutically active agent, without cooling the surface to a temperature below a temperature of the solution, are also disclosed.
摘要:
Methods of manufacturing polymeric stents by forming a pattern on a polylactic acid tube using a second harmonic generator laser and polylactic acid polymeric stents having a pattern formed using a second harmonic generator laser.
摘要:
A method of laser machining a polymer construct to form a stent that includes a bioresorbable polymer and an absorber that increases absorption of laser energy during laser machining. The laser cuts the tubing at least in part by a multiphoton absorption mechanism and the polymer and absorber have a very low absorbance or are transparent to light at the laser wavelength.
摘要:
A stent-graft assembly is provided for a variety of medical treatments. The stent-graft assembly includes a stent disposed to and attached between an inner layer of graft material and an outer layer of graft material. One of both of the graft layers includes one or more of a depression, dimple or detent that increases the localized surface area of the graft in one or more portions of the stent otherwise susceptible to graft stretching in the absence of the depression, dimple or detent. There is also described a method of forming dimples in selective locations on one or port graft layers in one or more locations relative to a portion of the stent where a portion of the graft may be susceptible to stretching or tearing during crimping or loading operations.
摘要:
An automated apparatus and method for coating medical devices such as an intravascular stent, are disclosed in the method, a 2-D image of a stent is processed to determine (1) paths along the stent skeletal elements by which a stent secured to a rotating support element can be traversed by a dispenser head whose relative motion with respect to the support element is along the support-element axis, such that some or all of the stent skeletal elements will be traversed (2) the relative speeds of the dispenser head and support element as the dispenser head travels along the paths, and (3), and positions of the dispenser head with respect to a centerline of the stent elements as the dispenser head travels along such paths The rotational speed of the support and relative linear speed of the dispenser are controlled to achieve the desired coating thickness and coating coverage on the upper surfaces, and optionally, the side surfaces, of the stem elements.
摘要:
A stent includes a series of helical windings defining an outer circumference of a cylinder. The helical windings include a plurality of struts having straight portions connected by curved portions. The straight portions may be substantially aligned with a longitudinal axis of the stent when the stent is in a reduced state. A plurality of bridges connect adjacent windings. The bridges may be substantially orthogonal to the longitudinal axis of the stent in the reduced state. A plurality of radiopaque members extend from a terminal helical winding. The radiopaque members include an extension portion and an end portion. The extension portion may have a first width and the end portion may have a second width greater than the first width. The end portion may include an extreme end substantially orthogonal to the longitudinal axis of the stent.