Percutaneous transluminal angioplasty device with integral embolic filter
First Claim
1. A percutaneous interventional treatment apparatus comprising:
- an elongated catheter having a lumen, a proximal end portion, a distal end portion, an outer side wall, and a longitudinal axis;
an interventional device operably coupled to the distal end portion of the elongated catheter;
a filter operably coupled to the distal end portion of the elongated catheter and spaced from the interventional device relative to the longitudinal axis of the elongated catheter, wherein the filter is selectively collapsible and expandable about and between a collapsed position and a deployed position, and wherein the filter comprises;
a movable ring slidably coupled to the elongated catheter;
a fixed ring spaced from the movable ring relative to the longitudinal axis of the elongated catheter and immovably coupled to the elongated catheter,a tubular frame formed of a shape memory material having a shape memory that urges the filter towards the collapsed position and comprising a first end coupled to the movable ring and an opposed second end coupled to the fixed ring, wherein the tubular frame further comprises;
a first plurality of longitudinal struts, each strut of the first plurality of longitudinal struts comprising a first end coupled to the fixed ring, a second end extending toward the movable ring, and at least one oval cutout, wherein the major axis of the at least one oval cutout is oriented transverse to the longitudinal axis of the strut of the first plurality of longitudinal struts,a second plurality of longitudinal struts, each strut of the second plurality of longitudinal struts having a first end coupled to the movable ring, a second end extending toward the fixed ring, and at least one oval cutout, wherein the major axis of the at least one oval cutout is oriented transverse to the longitudinal axis of the strut of the second plurality of longitudinal struts,at plurality of intermediate struts positioned between the first and second plurality of longitudinal struts, wherein a first side of a selected intermediate strut is coupled to the second end of a selected strut of the first plurality of longitudinal struts, and wherein a second side of the selected intermediate strut is coupled to the second end of a selected strut of the second plurality of longitudinal struts,anda filter membrane operably coupled to the tubular frame;
an actuator wire extending through the lumen of the elongated catheter and having proximal and distal ends,wherein, when the filter is in the collapsed position, pulling on the proximal end of the actuator wire exerts a force on the movable ring in a direction relative to the longitudinal axis of the elongated catheter that moves the movable ring towards the fixed ring; and
wherein selective movement of the movable ring towards the fixed ring causes at least a portion of the tubular frame to expand radially, thereby selectively expanding the filter towards the deployed position.
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Accused Products
Abstract
A percutaneous transluminal angioplasty device includes an embolic filter mounted to the catheter shaft at a location distal to the angioplasty balloon. Thus the filter is downstream from the blockage and is properly positioned to capture embolic particles that may be set loose into the blood stream as the angioplasty procedure is performed. The embolic filter is normally collapsed against the catheter shaft to facilitate introduction and withdrawal of the device to and from the operative site. Once the angioplasty balloon is properly positioned, however, means operatively associated with the embolic filter are actuated to erect the filter to position a filter mesh across the lumen of the vessel.
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Citations
19 Claims
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1. A percutaneous interventional treatment apparatus comprising:
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an elongated catheter having a lumen, a proximal end portion, a distal end portion, an outer side wall, and a longitudinal axis; an interventional device operably coupled to the distal end portion of the elongated catheter; a filter operably coupled to the distal end portion of the elongated catheter and spaced from the interventional device relative to the longitudinal axis of the elongated catheter, wherein the filter is selectively collapsible and expandable about and between a collapsed position and a deployed position, and wherein the filter comprises; a movable ring slidably coupled to the elongated catheter; a fixed ring spaced from the movable ring relative to the longitudinal axis of the elongated catheter and immovably coupled to the elongated catheter, a tubular frame formed of a shape memory material having a shape memory that urges the filter towards the collapsed position and comprising a first end coupled to the movable ring and an opposed second end coupled to the fixed ring, wherein the tubular frame further comprises; a first plurality of longitudinal struts, each strut of the first plurality of longitudinal struts comprising a first end coupled to the fixed ring, a second end extending toward the movable ring, and at least one oval cutout, wherein the major axis of the at least one oval cutout is oriented transverse to the longitudinal axis of the strut of the first plurality of longitudinal struts, a second plurality of longitudinal struts, each strut of the second plurality of longitudinal struts having a first end coupled to the movable ring, a second end extending toward the fixed ring, and at least one oval cutout, wherein the major axis of the at least one oval cutout is oriented transverse to the longitudinal axis of the strut of the second plurality of longitudinal struts, at plurality of intermediate struts positioned between the first and second plurality of longitudinal struts, wherein a first side of a selected intermediate strut is coupled to the second end of a selected strut of the first plurality of longitudinal struts, and wherein a second side of the selected intermediate strut is coupled to the second end of a selected strut of the second plurality of longitudinal struts, and a filter membrane operably coupled to the tubular frame; an actuator wire extending through the lumen of the elongated catheter and having proximal and distal ends, wherein, when the filter is in the collapsed position, pulling on the proximal end of the actuator wire exerts a force on the movable ring in a direction relative to the longitudinal axis of the elongated catheter that moves the movable ring towards the fixed ring; and wherein selective movement of the movable ring towards the fixed ring causes at least a portion of the tubular frame to expand radially, thereby selectively expanding the filter towards the deployed position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification