Aortic filter

• US 20030216774A1
• Filed: 05/16/2002
• Published: 11/20/2003
• Est. Priority Date: 05/16/2002
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Larson, Christopher R.
• Granted Patent: US 7,585,309 B2
• Time in Patent Office: Days
• US Class Current: 606/200
• CPC Class Codes: A61F 2/0105 Open ended, i.e. legs gathered only at one side
• CPC Class Codes: A61F 2/011 Instruments for their placement or removal
• CPC Class Codes: A61F 2002/018 made from tubes or sheets of material, e.g. by etching or laser-cutting
• CPC Class Codes: A61F 2230/0006 circular
• CPC Class Codes: A61F 2230/0067 conical

Abstract

Devices and methods for filtering embolic debris from a body lumen. The present invention includes a filter coupled to an elongate shaft. In some embodiments, the shaft may be tubular so as to be capable of allowing a guiding, therapeutic, or diagnostic device to pass therethrough.

Claims

1. An embolic protection device, comprising:

an elongate tubular shaft having a proximal end, a distal end, and a lumen extending therethrough;

a filter coupled to the shaft proximate the distal end, the filter having a distal mouth region;

a sheath slidably disposed about the shaft; and

a pull cord coupled to the mouth portion and extending proximally along a longitudinal axis of the shaft such that such that altering the position of the pull cord shifts the filter between a first generally collapsed configuration and a second generally expanded configuration.

2. The embolic protection device in accordance with claim 1, wherein the filter is biased to be in the second configuration.

3. The embolic protection device in accordance with claim 1, wherein the shaft further comprises a second lumen extending along the longitudinal axis of the shaft.

4. The embolic protection device in accordance with claim 3, wherein at least a portion of the pull cord is disposed within the second lumen.

5. The embolic protection device in accordance with claim 3, wherein the shaft further comprises one or more additional lumens.

6. The embolic protection device in accordance with claim 5, further comprising one or more additional pull cords, each additional pull cord being disposed in one of additional lumen additional.

7. The embolic protection device in accordance with claim 1, wherein the filter includes a filtering portion comprising filtering material and an extension portion comprised of non-filtering material, wherein the mouth region is disposed at the extension portion.

8. The embolic protection device in accordance with claim 1, further comprising a medical device slidably disposed within the lumen.

9. An embolic protection device, comprising:

a catheter having a proximal end, a distal end, and a lumen extending therethrough;

wherein the lumen is sized to allow a second catheter to be slidably disposed therein;

a filter coupled to the catheter proximate the distal end, the filter having a distal mouth region;

wherein the filter is adapted and configured to shift between a first generally collapsed configuration and a second generally expanded configuration;

a sheath slidably disposed about the catheter; and

a pull cord coupled to the mouth portion and extending proximally along a longitudinal axis of the catheter such that such that altering the position of the pull cord shifts the filter between the first and the second configuration.

10. The embolic protection device in accordance with claim 9, wherein the filter is biased to be in the second configuration.

11. The embolic protection device in accordance with claim 9, wherein the catheter further comprises a second lumen extending along the longitudinal axis thereof.

12. The embolic protection device in accordance with claim 11, wherein at least a portion of the pull cord is disposed within the second lumen.

13. The embolic protection device in accordance with claim 11, wherein the catheter further comprises one or more additional lumens.

14. The embolic protection device in accordance with claim 13, further comprising one or more additional pull cords, each additional pull cord being disposed in one of the additional lumens.

15. The embolic protection device in accordance with claim 9, wherein the filter includes a filtering portion comprising filtering material and an extension portion comprised of non-filtering material, wherein the mouth region is disposed at the extension portion.

16. An embolic protection device, comprising:

a catheter having a proximal end, a distal end, and a lumen extending therethrough;

wherein the lumen is sized to allow a second catheter to be slidably disposed therein;

a filter coupled to the catheter proximate the distal end, the filter having a distal mouth region;

means for shifting the filter between a first generally collapsed configuration and a second generally expanded configuration, wherein the means for shifting the filter is coupled to the mouth region of the filter; and

a sheath slidably disposed about the catheter.

17. The embolic protection device in accordance with claim 16, wherein means for shifting the filter includes a pull cord coupled to the filter and extending proximally along a longitudinal axis of the catheter such that such that altering the position of the pull cord shifts the filter between the first configuration and the second configuration.

18. A method of filtering embolic debris from a blood vessel, comprising the steps of:

providing a first catheter having a proximal end, a distal end, at least one lumen extending therethrough, a filter disposed near the distal end;

advancing the first catheter and delivery sheath through a blood vessel to a landing area;

deploying the filter at the landing area;

advancing a second catheter through the lumen of the first catheter for placement in a renal artery; and

capturing embolic debris with the filter.

19. The method in accordance with claim 18, further comprising the step of disposing at least a portion of the first catheter within a delivery sheath.

20. The method in accordance with claim 18, further comprising the step of actuating a pull cord to at least partially collapse the filter.

21. The method in accordance with claim 20, wherein the first catheter includes a second lumen disposed along the longitudinal axis thereof and the pull cord extends through the second lumen and outside of the blood vessel, and wherein the step of actuating the pull cord includes proximally pulling the pull cord from outside the blood vessel.

22. The method in accordance with claim 20, wherein the filter includes a first portion being comprised of filter material and a second portion being comprised of non-filter material, and wherein the step of actuating the pull cord includes at least partially collapsing the non-filter material.