Angioplasty device with embolic filter
First Claim
1. A percutaneous transluminal angioplasty device, comprising an elongated catheter having proximal and distal ends and an outer side wall;
- a treatment means attached to the catheter adjacent to the distal end thereof for treating a stenosis in a vessel;
a frame supporting an embolic filter, the frame being attached to the catheter between the treatment means and the distal end of the catheter, the frame being collapsible for insertion into a blood vessel, and the frame being expandable to an expanded position to deploy the embolic filter to capture emboli related into a bloodstream by operation of the treatment means, comprising;
a proximal ring;
a distal ring;
a plurality of longitudinally extending struts, each strut having a longitudinal axis and a width measured transverse to the longitudinal axis, wherein each strut of the plurality of struts comprises;
a proximal end attached to the proximal ring;
a distal end attached to the distal ring;
a midsection;
first, second, and third zones of weakness, each zone of weakness comprising;
a set of oval shaped members spaced along the longitudinal axis of the strut, formed in the strut, and circumscribing an oval opening, the oval opening having a long axis that is substantially transverse to the longitudinal axis of the strut; and
at least one connecting link formed in the strut and extending between adjacent oval shaped members of the zone of weakness, wherein each connecting link has a width, and the width of each connecting link is less than the width of the strut in which it is formed,wherein the oval members of the first zone of weakness are formed in the strut adjacent the proximal end of the strut,wherein the oval members of the second zone of weakness are formed in the strut adjacent the distal end of the strut,wherein the oval members of the third zone of weakness are formed in the midsection of the strut, andwherein each oval shaped member of the first, second, and third zones of weakness corresponds to a flex point that permits radial movement of its associated strut while restricting lateral movement of its associated strut,wherein each oval shaped member is configured for longitudinal elongation to permit expansion of the frame, andwherein the frame further comprises at least one expandable and resilient radial connector, each radial connector radially connecting two adjacent struts by attaching at a point along the third zone of weakness.
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Accused Products
Abstract
An angioplasty device has a filter associated with it to capture embolic particles that may be broken free during an angioplasty procedure. In one embodiment the embolic filter has a frame in which struts are connected to end rings and to each other by a plurality of interconnected oval members. In another embodiment the device includes an actuator at the proximal end of an actuator wire. By rotating a knob on the device, the physician can smoothly tension the wire by a predetermined amount to prevent the filter from opening too much or too little. Various other embodiments of filter frames are also disclosed.
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Citations
16 Claims
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1. A percutaneous transluminal angioplasty device, comprising an elongated catheter having proximal and distal ends and an outer side wall;
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a treatment means attached to the catheter adjacent to the distal end thereof for treating a stenosis in a vessel; a frame supporting an embolic filter, the frame being attached to the catheter between the treatment means and the distal end of the catheter, the frame being collapsible for insertion into a blood vessel, and the frame being expandable to an expanded position to deploy the embolic filter to capture emboli related into a bloodstream by operation of the treatment means, comprising; a proximal ring; a distal ring; a plurality of longitudinally extending struts, each strut having a longitudinal axis and a width measured transverse to the longitudinal axis, wherein each strut of the plurality of struts comprises; a proximal end attached to the proximal ring; a distal end attached to the distal ring; a midsection; first, second, and third zones of weakness, each zone of weakness comprising; a set of oval shaped members spaced along the longitudinal axis of the strut, formed in the strut, and circumscribing an oval opening, the oval opening having a long axis that is substantially transverse to the longitudinal axis of the strut; and at least one connecting link formed in the strut and extending between adjacent oval shaped members of the zone of weakness, wherein each connecting link has a width, and the width of each connecting link is less than the width of the strut in which it is formed, wherein the oval members of the first zone of weakness are formed in the strut adjacent the proximal end of the strut, wherein the oval members of the second zone of weakness are formed in the strut adjacent the distal end of the strut, wherein the oval members of the third zone of weakness are formed in the midsection of the strut, and wherein each oval shaped member of the first, second, and third zones of weakness corresponds to a flex point that permits radial movement of its associated strut while restricting lateral movement of its associated strut, wherein each oval shaped member is configured for longitudinal elongation to permit expansion of the frame, and wherein the frame further comprises at least one expandable and resilient radial connector, each radial connector radially connecting two adjacent struts by attaching at a point along the third zone of weakness. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification