Embolic filtering devices for bifurcated vessels

An embolic filtering device, comprising:

• a delivery device having,
• a first guide wire, the first guide wire having a proximal end and a distal end, and
• a second guide wire, the second guide wire having a proximal end and a distal end, the second guide wire being coupled to the first guide wire and projecting distally from a distal-end region of the first guide wire, the intersection between the first guide wire and the second guide wire forming a junction, the first guide wire and the second guide wire substantially forming a plane;
• a filter support having,
• an expandable first loop coupled to the first guide wire, a center of the first loop being positioned substantially on the plane between the first guide wire and the second guide wire on a side opposite the second guide wire, and
• an expandable second loop coupled to the first guide wire, a center of the second loop being positioned substantially on the plane between the first guide wire and the second guide wire on the same side as the second guide wire;
• and
• a filter element having,
• an opening at a proximal end, the opening of the filter element being coupled to a portion of the perimeter of the first loop of the filter support and to a portion of the perimeter of the second loop of the filter support,
• a first leg extending distally toward the distal end of the first guide wire from the first loop of the filter support, and
• a second leg extending distally toward the distal end of the second guide wire from the second loop of the filter support;
• wherein the distal-end region of the first guide wire extends through the first leg of the filter element and the second guide wire extends through the second leg of the filter element.

An embolic filtering device for use in a bifurcated biological vessel, comprising:

• a delivery device having,
• a first guide wire for directing the embolic filtering device to a first branch of the bifurcated vessel, the first guide wire having a proximal end and a distal end, and
• a second guide wire for directing the embolic filtering device to a second branch of the bifurcated vessel, the second guide wire having a proximal end and a distal end, the second guide wire being coupled to the first guide wire and projecting distally from a distal-end region of the first guide wire, the intersection between the first guide wire and the second guide wire forming a junction;
• a filter support having,
• an expandable first loop coupled to the first guide wire, the first loop including a preset deflection proximate the first end and second end of the first loop, the first loop diverging from a longitudinal axis of the first guide wire at the deflection of the first loop, and
• an expandable second loop coupled to the first guide wire, the second loop including a preset deflection proximate the first end and second end of the second loop, the second loop diverging from the longitudinal axis of the first guide wire at the deflection of the second loop;
• and
• a filter element having,
• an opening at a proximal end coupled to the filter support,
• a first leg extending distally toward the distal end of the first guide wire from the first loop of the filter support, the first leg tapering toward a distal end of the first leg, the distal end of the first leg having an aperture,
• a second leg extending distally toward the distal end of the second guide wire from the second loop of the filter support, the second leg tapering toward a distal end of the second leg, the distal end of the second leg having an aperture, and
• a crotch at a junction between the first leg and the second leg and positioned distal to the junction between the first guide wire and the second guide wire;
• wherein the distal-end region of the first guide wire extends through the first leg of the filter element and through the aperture at the distal end of the first leg of the filter element and the second guide wire extends through the second leg of the filter element and through the aperture at the distal end of the second leg of the filter element.

An embolic filtering device for use in a bifurcated biological vessel, comprising:

• a delivery device having,
• a first guide wire for directing the embolic filtering device to a first branch of the bifurcated vessel, the first guide wire having a proximal end and a distal end, and
• a second guide wire for directing the embolic filtering device to a second branch of the bifurcated vessel, the second guide wire having a proximal end and a distal end, the second guide wire being coupled to the first guide wire and projecting distally from a distal-end region of the first guide wire, the intersection between the first guide wire and the second guide wire forming a junction, the first guide wire and the second guide wire substantially forming a plane;
• a filter support having,
• an expandable first loop coupled to the first guide wire, the first loop including a preset deflection proximate the first end and second end of the first loop, the first loop diverging from a longitudinal axis of the first guide wire at the deflection of the first loop, a center of the first loop being positioned substantially on the plane between the first guide wire and the second guide wire on a side opposite the second guide wire, and
• an expandable second loop coupled to the first guide wire, the second loop including a preset deflection proximate the first end and second end of the second loop, the second loop diverging from the longitudinal axis of the first guide wire at the deflection of the second loop, a center of the second loop being positioned substantially on the plane between the first guide wire and the second guide wire on the same side as the second guide wire;
• and
• a filter element having,
• an opening at a proximal end, the opening of the filter element being coupled to a portion of the perimeter of the first loop of the filter support and to a portion of the perimeter of the second loop of the filter support,
• a first leg extending distally toward the distal end of the first guide wire from the first loop of the filter support, the first leg tapering toward a distal end of the first leg, the distal end of the first leg having an aperture,
• a second leg extending distally toward the distal end of the second guide wire from the second loop of the filter support, the second leg tapering toward a distal end of the second leg, the distal end of the second leg having an aperture, and
• a crotch at a junction between the first leg and the second leg and positioned distal to the junction between the first guide wire and the second guide wire;
• wherein the distal-end region of the first guide wire extends through the first leg of the filter element and through the aperture at the distal end of the first leg of the filter element;
• and
• wherein the second guide wire extends through the second leg of the filter element and through the aperture at the distal end of the second leg of the filter element.