Percutaneous transluminal angioplasty device with integral embolic filter
First Claim
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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;
a filter operably coupled to the distal end portion 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 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, and a second end extending toward the movable ring,a second plurality of longitudinal struts, each strut of the second plurality of longitudinal struts comprising a first end coupled to the movable ring, and a second end extending toward the fixed ring,a 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 mesh or membrane directly attached at a first end to the plurality of intermediate struts, extending over an outer surface of the movable ring, and directly attached at a second end to the catheter, thereby forming a sac that retains embolic particles when the filter is in the collapsed position;
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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Abstract
A percutaneous transluminal angioplasty device having an embolic filter mounted to the catheter shaft at a location distal to the angioplasty balloon and downstream from the blockage 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 operatively position a filter mesh across the lumen of the vessel.
126 Citations
16 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; a filter operably coupled to the distal end portion 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 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, and a second end extending toward the movable ring, a second plurality of longitudinal struts, each strut of the second plurality of longitudinal struts comprising a first end coupled to the movable ring, and a second end extending toward the fixed ring, a 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 mesh or membrane directly attached at a first end to the plurality of intermediate struts, extending over an outer surface of the movable ring, and directly attached at a second end to the catheter, thereby forming a sac that retains embolic particles when the filter is in the collapsed position; 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)
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Specification