92results about How to "Improve trackability" patented technology

A system for treatment of a vessel bifurcation and its method of use comprises a catheter having a catheter shaft, a portion of which is characterized as an axle about which a rotatable assembly is disposed and rotatable thereabout. The system employs a series of lumens, openings and / or ports to provide a balloon mounted on the rotatable assembly with fluid communication to the catheter shaft.

A method of sterilizing a medical device component, such as a catheter balloon, in which an electron beam (i.e., e-beam) is applied to the component in an evacuated or inert gas-filled container. The method of the invention allows for electron beam sterilization without significant degradation of the component polymeric material. In one embodiment, the device component is configured to be pressurized or expanded during use. The method of the invention provides a component with a rupture pressure that is not significantly decreased due to electron beam sterilization. Another aspect of the invention is a medical device component, e-beam sterilized according to a method of the invention. A variety of medical device components can be sterilized by the method of the invention, and particularly intracorporeal devices for therapeutic or diagnostic purposes, such as balloon catheters, catheter shafts and balloons, stent covers, and vascular grafts.

A catheter for delivering a stent includes an outer tube having a proximal end, a distal end and a wall defining a lumen; an inner tube disposed within the outer tube and defining a lumen for a guidewire, wherein a portion of a length of the inner tube is wrapped around with a spiral-shaped wire; a balloon sealingly connected to the inner tube and the outer tube adjacent the distal ends thereof, the balloon defining an interior volume and having an exterior surface; and a marker made from a wire of a highly radiopaque and ductile material, wherein the wire is wrapped in a plurality of at least partially overlapping layers such that the marker is flexible along the length of the catheter.

A catheter having an elongated shaft and a balloon on a distal shaft section, the elongated shaft comprising an outer tubular member, and an inner tubular member which has a bonded portion along which an outer surface of the inner tubular member is bonded to an inner surface of the outer tubular member. The inner tubular member has a proximal portion proximal to the bonded portion, and a distal portion distal to the bonded portion with higher axial compression stiffness and column strength than the proximal portion thereof. The catheter has improved trackability, axial collapse resistance, pushability, and crossability, for improved ability to position the balloon at a desired location in a patient's body lumen.

Digital data obtained by converting, by an A / D converter, an angular velocity measured by a sensor is transmitted from a remote control to a game machine. A CPU of the game machine corrects the digital data. That is, the CPU sequentially stores sequential digital data in a buffer. A stable range (d1-d2) in which each digital data can be defined to be stable is calculated for the latest digital data. An average value of those of the digital data stored in the buffer that are consecutively present in the stable range retrogressively from the latest digital data is calculated. Using the average value, the latest digital data is corrected.

To provide a lumen-friendly, flexible stent which is excellent in trackability to lumens (thus, it is able to pass through the three-dimensionally meandering lumens), substantially free from shortening (shortening of the length), uniformly expandable.A stent according to the present invention comprises radially expandable annular members (1) which are aligned in a longitudinal direction of the stent, and one or more coupling elements (2) that couple adjoining two annular members (1) in the longitudinal direction of the stent, wherein said annular member comprises first annular member elements (11) and second annular member elements (12), which have a plane symmetrical pattern and are alternately connected in the circumferential direction of the annular member, and wherein under the condition that the stent is unfolded onto a plane, the first annular member element (11) includes one wave mountain, while the second annular member element (12) includes one wave trough, the adjoining two annular members being connected between the junctions which connect the first annular member elements (11) and second annular member elements (12) of the respective annular members.

A catheter assembly and method of use comprises advancing a catheter having a rotatably mounted balloon relative to the primary guide wire to a vessel bifurcation along first and second guide wires.

This invention relates to medical devices containing melt-processible polytetrafluoro-ethylene (PTFE) and methods of making same.

A catheter shaft for a catheter includes a centrally-located guidewire lumen. A body portion of the catheter shaft includes arc-shaped nodes that define a guidewire track within the guidewire lumen. The nodes include a crown region that includes a single contact point for the guidewire and may be formed of a material having a lower coefficient of friction. At least one node has an inflation lumen extending therethrough. The catheter shaft has a cut in it extending radially from the guidewire lumen to an exterior surface of the catheter shaft. The balloon catheter has a guide member that opens the cut and tracks the guidewire in and out of the catheter shaft along a length of the catheter shaft which is cut.

A catheter assembly and method of use comprises advancing a catheter having a rotatably mounted balloon relative to the primary guide wire to a vessel bifurcation along first and second guide wires.