Embolic protection device for protecting the cerebral vasculature
View Patent ↗Single filter and multi-filter endolumenal methods and systems for filtering fluids within the body. In some embodiments a blood filtering system captures and removes particulates dislodged or generated during a surgical procedure and circulating in a patient's vasculature. In some embodiments a filter system protects the cerebral vasculature during a cardiac valve repair or replacement procedure.
1. An embolic protection device for isolating the cerebral vasculature, comprising:
a first elongate, tubular body, having a proximal end, a distal end and a central lumen extending therethrough;
a first filter having a distally facing opening, attached to the first tubular body;
a second tubular body, extending through the central lumen; and
a second filter having a proximally facing opening, attached to the second tubular body;
a flex zone on the second tubular body positioned proximal to the second filter and distal to the first filter, the flex zone having a greater flexibility than proximal and distal adjacent portions of the second tubular body and wherein a guidewire lumen extends through the flex zone.
2. The embolic protection device of claim 1 , further comprising a first sheath and a second sheath, wherein the first filter is collapsible within the first sheath and the second filter is collapsible within the second sheath.
3. The embolic protection device of claim 2 , wherein the first sheath and the second sheath are independently retractable.
4. The embolic protection device of claim 2 , further comprising a tethering member extending from the first sheath to the first filter, wherein retracting the first sheath draws a portion of the first filter laterally.
5. The embolic protection device of claim 2 , further comprising a tethering member extending from the second sheath to the second filter, wherein advancing the second tubular body draws a portion of the second filter laterally.
6. The embolic protection device of claim 1 , further comprising a first filter control configured to release the first filter and a second filter control configured to release the second filter.
7. The embolic protection device of claim 6 , further comprising a locking mechanism configured to lock the first filter control relative to the second filter control.
8. The embolic protection device of claim 1 , wherein the first and second filters each have an oblique truncated cone shape.
9. The embolic protection device of claim 1 , wherein the first and second filters are detachable from the embolic protection device.
10. The embolic protection device of claim 1 , wherein the second tubular body further comprises an atraumatic distal tip.
11. A dual filter catheter, for positioning through the brachiocephalic artery and into the left common carotid artery, comprising:
an elongate, flexible body, having a proximal end, a distal end, and a first central lumen extending therethrough;
a proximal filter attached to the body, having an open end facing in a distal direction;
a distal sheath comprising a deflection zone, having a proximal end, a distal end, a second central lumen extending therethrough, the distal sheath slidable through the first central lumen;
a tubular core member slidable through the second central lumen;
a distal filter attached to the tubular core member, having an open end facing in a proximal direction; and
a flex zone on the tubular core member positioned proximal to the second filter and distal to the first filter, the flex zone having a greater flexibility than proximal and distal adjacent portions of the and wherein a guidewire lumen extends through the flex zone.
12. The dual filter catheter of claim 11 , wherein the deflection zone is configured to rotate, translate axially, and deflect.
13. The dual filter catheter of claim 11 , wherein the deflection zone deflects from at least about 15 degrees to no more than about 220 degrees.
14. The dual filter catheter of claim 11 , wherein the deflection zone permits deflection of a first segment within a first plane, and a second segment within a second plane.
15. The dual filter catheter of claim 14 , wherein the angle between the first and second plane is between about 20 degrees and about 75 degrees.
16. The dual filter catheter of claim 11 , further comprising a deflection zone control on the proximal end of the body, the deflection zone control comprising a locking mechanism to prevent the deflection zone from deflecting unintentionally.
17. The dual filter catheter of claim 16 , wherein the locking mechanism automatically locks when an operator releases the deflection zone control.