Emboli filtration system and methods of use
AssigneeBaff LLC
InventorsMark C. Bates, Michael Horzewski
Life of this patent
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Abstract
An emboli filtration apparatus is provided comprising a guide wire having a filter element captured thereon, so that the guide wire is free to rotate and translate while the filter element remains stationary. The apparatus allows for movement and rotation of the guide wire as devices are advanced over it to treat occlusive disease, substantially without dislodging the filter element.
Claims26
Apparatus for filtering emboli from blood flowing through a vessel, the apparatus comprising:
- a guide wire having a distal region and a stop on the distal region;
- a capture ring disposed for translation on the guide wire, the stop limiting translation of the capture ring in a distal direction;
- and
- a filter sac connected to the capture ring.
Apparatus for filtering emboli from blood flowing through a vessel, the apparatus comprising:
- a guide wire having a first portion having a first diameter and a distal region having a second diameter greater than the first diameter;
- and
- a filter element having a capture ring disposed for translation on the first portion, the capture ring having an aperture greater than the first diameter but smaller than the second diameter,
- wherein rotation or distal translation of the guide wire relative to the capture ring does not displace the filter element.
Apparatus for filtering emboli during treatment of occlusive disease in a vessel, the apparatus comprising:
- a guide wire having a first diameter and a distal region having a second diameter greater than the first diameter;
- a filter element having a sac coupled to a capture ring, the capture ring having an aperture greater than the first diameter but smaller than the second diameter,
- wherein the filter element is disposed on the guide wire and the guide wire extends through the aperture with the distal region disposed distally of the capture ring, so that when the filter element is deployed in the vessel, rotation or distal translation of the guide wire does not displace the filter element, but retraction of the guide wire in a proximal direction causes the distal region to abut against the capture ring.
A method of filtering emboli from blood flowing through a vessel, the method comprising:
- providing a guide wire having a distal region including a stop, and a filter element having a capture ring disposed for translation on the guide wire proximal of the stop;
- transluminally inserting the guide wire and filter element into a vessel;
- deploying the filter element to engage a wall of the vessel, the filter element filtering emboli out of blood flowing through the vessel;
- advancing a treatment device along the guide wire to treat a portion of the vessel proximal to the location of the filter element, rotation or distal translation of the guide wire relative to the filter element imparted by the treatment device not displacing the filter element.
Dependencies are inferred from the claim text.