60 results about "Embolic Protection Filters" patented technology

Embolic protection filters and methods of making and using such devices are disclosed. An illustrative method of making a device for filtering embolic debris from a body may include the steps of molding a filter assembly that includes a distal tip and a filter portion, forming a plurality of apertures within the filter portion, and coupling a support member to the filter assembly that is adapted to shift the filter portion between a collapsed configuration and an expanded configuration.

A method of using a balloon catheter to perform a medical procedure at a treatment site in a patient's body lumen and to recover an expanded device, such as an embolic protection device, which is adjacent to the treatment site in the body lumen. The inflated balloon is deflated and regroomed to a low profile configuration in the body lumen, and the balloon catheter is advanced distally from the treatment site to collapse the expanded device (e.g., embolic protection filter) within the balloon catheter. The balloon catheter has a recovery distal tip for collapsing an expanded device, and has a regrooming sheath member configured to slidably receive the deflated balloon therein to regroom the balloon.

A guide catheter (30) is described for introduction into a patient's vasculature, to provide a substantially continuous guide lumen (28) within the vasculature to the ascending aorta (34), through which one or more other functional catheters (44) may be introduced and removed during the procedure. The guide catheter includes an aligner (70) at its distal region for aligning the position and / or inclination of the distal region of the guide catheter with respect to the ascending aorta. The aligner includes an embolic protection filter (88). The guide catheter is made of material collapsible / distensible in cross section to adopt a small shape when no catheter is present inside, and to distend to a large shape to accommodate passage of functional catheter therethrough. The cross-section shape collapses / distends by folding / unfolding of material without elastic stretching of the material.

A basket for an embolic protection filtering device to be deployed within a body lumen for capturing embolic debris is disclosed. In one embodiment, a strut pattern forming the basket includes V-shaped struts having an internal radius at the apex with a kerf on each strut arm beginning at the radius and extending toward an opposite end of the strut. The apex may have a bulbous shape. In another embodiment, the strut arms of the basket include undulations. Also, the apices may be situated so that one apex is longitudinally staggered from an adjacent apex. The combination of features enables the basket to be crimped to a small profile while distributing stress away from the apices of the V's in the strut pattern.

An embolic protection filter having an inverted membrane with improved blood perfusion characteristics is disclosed. An embolic protection filter in accordance with the present invention comprises a filter frame disposable about a guidewire, a support hoop coupled to a plurality of expandable struts, and an inverted membrane for filtering embolic debris. The inverted membrane has a tapered proximal section and an enlarged diameter distal section. Features of the present invention permit the perfusion of blood through the filter irrespective of embolic debris entrained therein.

An embolic protection filter having a reduced profile for placement within a body lumen is disclosed. One embodiment has an embolic protection filter that includes a filter frame slidably and rotationally disposed along a guidewire, a plurality of retaining collars coupled to a proximal end of the filter frame, a plurality of expandable struts each having a proximal section adapted to slide within a corresponding retaining collar, and a filter mesh coupled to a distal section of the expandable struts for filtering embolic debris.

An embolic protection filtering device and methods and making and using filtering devices. An example filtering device may include an elongate shaft or filter wire, a filter coupled to the filter wire, and a sheath. The methods for using the filtering device include using an introducer member to help back load a guidewire into the sheath and then advance the filtering device along the guidewire to a target region.

An embolic protection filter assembly and method of making the same. In at least some embodiments, the present invention relates to embolic protection filters having at least one radiopaque component.

Embolic protection filters that retain embolic debris captured therein are disclosed. One embodiment of an embolic protection filter includes a filter frame disposable about a guidewire, a filter membrane for filtering embolic debris, and a valve configured to prevent the escape of filtered embolic debris. The valve may comprise a leaflet valve having a plurality of leaflets configured to engage each other about a coaptive region.

An embolic protection filter delivery and / or retrieval assembly. In one embodiment the assembly includes a shaft having a filter coupled thereto, a sheath, and a tapering member.

A sheath for delivering and / or retrieving an embolic protection filtering devices. The sheath may include a proximal portion and a distal portion. The distal portion may be expandable and may include a bulbous member or region. Additionally, the sheath may include structural support in a number of different forms.

Embolic protection filtering devices and methods of making and using the same. The present invention may include an embolic protection filtering device including a filter cartridge that is slidable over medical devices, for example, guidewires. The filter cartridge may have a filter coupled thereto and may have desirable flexibility and trackability characteristics, for example, imparted by manufacturing the cartridge to include notches or a spiraling groove, or a coil disposed along the length of the cartridge. The filtering device may be advanced through a blood vessel to a target location, and expanded followed by advancing a therapeutic device over the guidewire and filtering debris generated by the therepeutic device with the filter.

An embolic protection filtering device and method of making and using the same. The present invention comprises a filtering device including an elongate shaft and a filter that may be releasably attachable to the shaft. The filter may include a coupling member that may be used to secure the filter to the shaft.

A retrieval catheter having a retrieval catheter tip 1 at a distal end thereof, the tip being suitable for retrieving an embolic protection filter into the tip 1. The tip 1 comprises a flexible tip body 2 and two stiff reinforcement columns 3. The tip body 2 is radially expandable to facilitate retrieval of a filter into the tip 1, and the columns 3 extend longitudinally along the tip body 2 to prevent buckling of the tip 1 upon retrieval of the filter into the tip. The cross-sectional area of the columns 3, the cross sectional area of the tip body 2, and the overall cross-sectional area of the tip 1 all remain substantially unchanged along the length of the tip 1. This ensures the reinforcement provided to the tip 1 by the columns 3 remains substantially uniform along the length of the tip 1. Thus no longitudinal squeezing of the filter as it is retrieved into the tip 1 will be caused.

An embolic protection filter and method of making the same. An embolic protection filter may include a filter membrane or material having a plurality of holes. In some embodiments, the filter membrane may be manufactured by spray coating a filter material onto a forming member or spray mold.

An embolic protection filter having a plurality of filter membranes for collecting embolic debris within a body lumen is disclosed. An embolic protection filter in accordance with an exemplary embodiment of the present invention includes a first filter membrane coupled to an elongated member, a second filter membrane coupled to the elongated member distal the first filter membrane, and an actuator mechanism for actuating the embolic protection filter within a vessel.

A filter retrieval catheter for retrieving an embolic protection filter (50) from a vasculature. The catheter comprises a catheter shaft (2) having a rapid exchange guidewire opening (4) in a sidewall of the catheter shaft (2) to facilitate rapid exchange of the catheter over a guidewire (5). To prevent buckling or kinking of the catheter shaft (2) in the region of the guidewire opening (4) during retrieval of the embolic protection filer (50), the catheter comprises two elongate reinforcement elements (6, 3) extending along the catheter shaft (2). The first reinforcement element (6) comprises an elongate wire element extending from a proximal end located proximally of the guidewire opening (4) to a distal end located distally of the guidewire opening (4). The second reinforcement element (3) comprises an elongate tubular element extending from a proximal end located adjacent to and distally of the guidewire opening (4) to a distal end (9) located further distally of the guidewire opening (4). The tube (3) tapers distally radially outwardly adjacent to the distal end (9). This tapered part (9) of the tube (3) is fixedly attached to the interior surface of the catheter shaft (2).

Methods of selectively treating linear elastic materials to produce localized areas of superelasticity and / or shape-memory are disclosed. In an illustrative method, a linear elastic workpiece may be formed into a particular shape by cold-forming or other low-temperature process, and incorporated into a medical device such as an embolic protection filter, vena cava filter, stent or guidewire. A heat source may be used to apply thermal energy to selective areas of the workpiece, imparting superelasticity to the material.

A catheter system 1 has an internal reception space for an embolic protection filter 10 to enable the filter 10 to be transported through a vasculature 20 and a treatment means such as a stent 15 to facilitate treatment. The catheter system may be used for retrieval of a filter 10 and stenting of a lesion with a stent 15. The procedure may also involve post dilatation using an on-board balloon 16.

An embolic protection filter delivery and / or retrieval assembly. In one embodiment the assembly includes a shaft having a filter coupled thereto, a sheath, and a tapering member.

A transvascular embolic protection system for safely capturing and retaining embolic material released during an interventional procedure comprises an embolic protection device (1) and a delivery catheter (2) for delivery of the embolic protection device (1) to a desired location in the vascular system. A pack (4) is provided to safely store and prepare the embolic protection system for use. The pack (4) comprises a tray (5) with a channel (6) extending in a looped configuration around the tray (5) for receiving the delivery catheter (2). A loading device (7) is mounted in the tray (5) adjacent to the delivery catheter (2). The embolic protection device (1) is mounted in an expanded configuration in a well (90) in the tray (5). A pushing device (8) for loading the collapsible embolic protection device (1) into the delivery catheter (2) is mounted in the tray (5) adjacent to the embolic protection device (1).

An improved embolic protection filtering device. In at least some embodiments, an embolic protection filtering device includes a filter wire assembly. The filter wire assembly may include an elongate shaft, a tubular member, and an embolic protection filter.

Embolic protection filtering devices and methods for making and using the same. An example filtering device includes a filter wire, a filter slidable over the filter wire, and a filter membrane coupled to the filter frame. The filter wire includes a plurality of stops. The filter includes a proximal tubular member, a distal tubular member, and a connecting tubular member extending between the proximal tubular member and the distal tubular member.