SLIDEABLE VASCULAR FILTER

• US 20110130785A1
• Filed: 02/09/2011
• Published: 06/02/2011
• Est. Priority Date: 08/27/1999
• Status: Abandoned Application

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: ev3, Inc. (Medtronic Plc)
• Inventors: Kusleika, Richard S.
• Application Number:
  US13/023,809
• Publication Number:
  US 20110130785A1
• Time in Patent Office: Days
• US Class Current: 606/200
• CPC Class Codes: A61F 2/0108 Both ends closed, i.e. legs gathered at both ends
• CPC Class Codes: A61F 2/011 Instruments for their placement or removal
• CPC Class Codes: A61F 2002/016 made from wire-like elements
• CPC Class Codes: A61F 2230/0006 circular
• CPC Class Codes: A61F 2250/0098 radio-opaque, e.g. radio-opaque markers

Abstract

A collapsible medical device for use, e.g., as a vascular filter. The device includes a mandrel having a distal end and a stop spaced proximally of the distal end. A proximal length of the mandrel extends proximally of the stop and a distal length of the mandrel extends distally of the stop. A functional element (e.g., a vascular filter) has a radially expandable body and includes a proximal slider and a distal slider. The proximal and distal sliders are slidable along the mandrel independently of one another such that the distance between the proximal slider and distal slider can be varied to effect different configurations of the functional element. In one method of using such a device, the functional element is urged distally to a treatment site by urging the mandrel distally. This causes the stop to exert a distal biasing force on the distal slider, which acts against a restorative force of the functional element to axially elongate the functional element and reduce friction between the functional element and a wall of the vessel.

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,

wherein, when the filter sac is deployed in the vessel, rotation or distal translation of the guide wire relative to the capture ring does not displace the filter sac, but retraction of the guide wire in a proximal direction causes the stop to abut against the capture ring.

2. 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.

3. The apparatus of claim 2 wherein the filter element comprises an expandable sac.

4. The apparatus of claim 2 wherein the guide wire further comprises a flange disposed on the distal region having a diameter larger than the diameter of the aperture in the capture ring.

5. 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.

6. The method of claim 5 further comprising:

providing a delivery sheath; and

compressing the filter element to a contracted state to insert the filter element within the delivery sheath.

7. The method of claim 5 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.

8. 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 ring disposed for translation on the guide wire, the stop limiting translation of the ring in a distal direction; and

a filter connected to the ring,

wherein, when the filter is deployed in the vessel, rotation of the guide wire relative to the ring does not displace the filter, but retraction of the guide wire in a proximal direction causes the stop to abut against the ring.

9. 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 ring disposed for translation on the first portion, the 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 ring does not displace the filter element.

10. The apparatus of claim 9 wherein the filter element comprises an expandable sac.

11. 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 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 of the guide wire relative to the filter element imparted by the treatment device not displacing the filter element.

12. The method of claim 11 further comprising:

providing a delivery sheath; and

compressing the filter element to a contracted state to insert the filter element within the delivery sheath.

13. The method of claim 11 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.

14. 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 self-expanding filter sac connected to the capture ring;

wherein, when the filter sac is deployed in the vessel, rotation or distal translation of the guide wire relative to the capture ring does not displace the filter sac, but retraction of the guide wire in a proximal direction causes the stop to abut against the capture ring.

15. 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 self-expanding 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.

16. The apparatus of claim 15 wherein the filter element comprises an expandable sac.

17. The apparatus of claim 15 wherein the guide wire further comprises a flange disposed on the distal region having a diameter larger than the diameter of the aperture in the capture ring.

18. A method of filtering emboli from blood flowing through a vessel, the method comprising:

providing a guide wire having a distal 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 not displacing the filter element.

19. A method of filtering emboli from blood flowing through a vessel, the method comprising:

providing a guide wire having a distal stop, and a filter element having a 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 of the guide wire relative to the filter element not displacing the filter element.