Emboli filtration system and methods of use
First Claim
Patent Images
1. 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.
5 Assignments
0 Petitions
Accused Products
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.
1317 Citations
26 Claims
-
1. 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. - View Dependent Claims (2, 3, 4, 5)
-
-
6. 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. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15)
-
-
16. 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. - View Dependent Claims (17, 18, 19, 20)
-
-
21. 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. - View Dependent Claims (22, 23, 24, 25, 26)
providing a delivery sheath; and
compressing the filter element to a contracted state to insert the filter element within the delivery sheath.
-
-
24. The method of claim 21 wherein the filter element comprises an expandable sac, and deploying the filter element comprises expanding the expandable sac so that a perimeter of the expandable sac contacts the wall of the vessel.
-
25. The method of claim 24 wherein the filter element further comprises a cylindrical sleeve and deploying the filter element further comprises expanding the cylindrical sleeve against the wall of the vessel.
-
26. The method of claim 21 further comprising providing a catheter having a lumen, and pulling the guide wire proximally causes the filter element to become retracted within the lumen.
Specification