ANGIOGRAPHY CATHETER

• US 20120179033A1
• Filed: 12/05/2011
• Published: 07/12/2012
• Est. Priority Date: 01/07/2011
• Status: Active Grant

• Current Assignee: Innovative Cardiovascular Solutions, LLC
• Original Assignee: Innovative Cardiovascular Solutions, LLC
• Inventors: Merhi, William M.
• Granted Patent: US 8,948,848 B2
• Time in Patent Office: Days
• US Class Current: 600/435
• CPC Class Codes: A61B 18/1492 having a flexible, catheter-like structure, e.g. for heart ablation A61B18/1477 takes precedence
• CPC Class Codes: A61B 2017/00243 cardiac
• CPC Class Codes: A61B 2090/3966 Radiopaque markers visible in an X-ray image
• CPC Class Codes: A61B 6/12 Arrangements for detecting or locating foreign bodies
• CPC Class Codes: A61F 2/013 Distal protection devices, i.e. devices placed distally in combination with another endovascular procedure, e.g. angioplasty or stenting
• CPC Class Codes: A61F 2/2433 using balloon catheter
• 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 2230/0008 elliptical or oval
• CPC Class Codes: A61F 2230/0067 conical
• CPC Class Codes: A61F 2230/008 paraboloidal
• CPC Class Codes: A61F 2250/0098 radio-opaque, e.g. radio-opaque markers

Abstract

Embolic protection devices and methods for capturing embolic debris. An embolic protection device includes a pigtail catheter having a lumen for housing a guidewire. The distal portion of the catheter has one or more apertures in fluid communication with the lumen and one or more radiopaque markers on the distal-most section. The device includes a self-expanding filter coupled to a side of the catheter and a movable outer sheath surrounding the catheter. The outer sheath holds the filter in a collapsed configuration when surrounding the filter. The outer sheath is proximally retracted to deploy the filter. A method of capturing embolic debris includes inserting a guidewire into a body lumen, tracking the device over the guidewire, retracting the guidewire, positioning the device using the radiopaque marker, retracting the outer sheath and deploying the filter, performing a procedure, and advancing the outer sheath to recapture the filter.

Claims

1. A method of capturing embolic debris, the method comprising:

inserting a distal end of an angiography catheter into a body lumen by tracking a lumen of the catheter over a guidewire percutaneously inserted into the body lumen, the angiography catheter comprising;

a proximal end and a distal end, the lumen extending from the proximal end to the distal end;

a distal portion comprising a longitudinally-extending radiopaque marker;

a self-expanding embolic filter attached to a side of the catheter proximal to the distal portion; and

an outer sheath containing the embolic filter in a collapsed configuration;

removing the guidewire from the lumen of the catheter, the distal portion of the catheter assuming a generally arcuate shape upon removing the guidewire from the distal portion of the catheter;

positioning the catheter by visualizing the radiopaque marker with an imaging technique; and

longitudinally proximally retracting the outer sheath and allowing the embolic filter to assume an expanded, deployed configuration having a distal opening substantially spanning the body lumen.

2. The method of claim 1, further comprising percutaneously inserting a second guidewire into a second body lumen of the patient and tracking a second catheter over the second guidewire, the second catheter carrying at least one of a replacement valve, a valve repair system, and a radio frequency ablation system.

3. The method of claim 1, further comprising:

longitudinally distally advancing the outer sheath, the embolic filter returning to the collapsed configuration and capturing any embolic debris contained in the embolic filter; and

removing the catheter from the body lumen.

4. The method of claim 1, wherein positioning the catheter comprises positioning the distal portion of the catheter against a lower border of a noncoronary cusp of an aortic valve.

5. The method of claim 1, further comprising connecting the proximal end of the catheter to a contrast material injector.

6. An embolic protection device comprising:

a catheter having a proximal end, a distal end, and a lumen extending from the proximal end of the catheter to the distal end of the catheter, the lumen configured to house a guidewire, a distal portion of the catheter configured to assume a generally arcuate shape being at least a semi-circle;

the distal portion of the catheter comprising a longitudinally-extending radiopaque marker configured to be arcuate and on a distal-most section of the catheter when the distal portion is in the generally arcuate shape;

a self-expanding embolic filter coupled to the catheter proximal to the distal portion, the embolic filter having a generally conical shape, the embolic filter comprising a distal opening and extending proximally from the distal opening to a closed proximal end; and

a deployment mechanism circumferentially around at least a portion of the catheter and longitudinally movable with respect to the catheter, the deployment mechanism configured to contain the embolic filter in a collapsed configuration, and the embolic filter configured to self-expand upon longitudinal proximal retraction of the deployment mechanism.

7. The embolic protection device of claim 6, wherein the embolic filter comprises a braided nitinol mesh.

8. The embolic protection device of claim 6, wherein the embolic filter is movably coupled to the catheter and is longitudinally movable with respect to the catheter.

9. The embolic protection device of claim 6, wherein the generally arcuate shape of the distal portion is towards the side of the catheter to which the embolic filter is coupled.

10. The embolic protection device of claim 6, further comprising a self-expanding deflector coupled to the catheter proximal to the distal portion, the deflector having a longitudinal axis parallel to a longitudinal axis of the catheter.

11. An angiography catheter comprising:

a catheter having a proximal end, a distal end, and a lumen extending from the proximal end of the catheter to the distal end of the catheter, the lumen configured to house a guidewire, a distal portion of the catheter configured to assume a generally arcuate shape being at least a semi-circle; and

the distal portion of the catheter comprising a longitudinally-extending radiopaque marker configured to be arcuate and on a distal-most section of the catheter when the distal portion is in the generally arcuate shape.

12. The angiography catheter of claim 11, wherein the radiopaque band comprises at least one of platinum, tantalum, tungsten, palladium, and iridium.

13. The angiography catheter of claim 11, wherein the generally arcuate shape is at least 90°

.

14. The angiography catheter of claim 11, wherein the generally arcuate shape is at least 350°

.

15. The angiography catheter of claim 11, further comprising at least one aperture in a side wall of the distal portion of the catheter, fluids being deliverable through the at least one aperture.

16. The angiography catheter of claim 15, wherein the at least one aperture is on an outer curved wall of the distal portion of the catheter when the distal portion is in the generally arcuate shape.

17. The angiography catheter of claim 15, wherein the at least one aperture comprises a plurality of apertures.

18. The angiography catheter of claim 11, further comprising a self-expanding deflector coupled to the catheter proximal to the distal portion, the deflector having a longitudinal axis parallel to a longitudinal axis of the catheter.

19. The angiography catheter of claim 18, further comprising a self-expanding embolic filter coupled to a side of the catheter, the embolic filter comprising a distal opening and extending proximally from the distal opening to a closed proximal end in a generally conical shape.

20. An embolic protection device comprising:

a catheter having a proximal end and a distal end;

a self-expanding embolic filter coupled to a side of the catheter, the embolic filter comprising a distal opening and extending proximally from the distal opening to a closed proximal end in a generally conical shape; and

an outer sheath longitudinally movable with respect to the embolic filter, the outer sheath configured to contain the embolic filter in a collapsed state when at least partially around the embolic filter, and the embolic filter configured to self-expand upon longitudinal proximal retraction of the outer sheath.

21. The embolic protection device of claim 20, wherein the embolic filter comprises a braided nitinol mesh.

22. The embolic protection device of claim 20, wherein the embolic filter is movably coupled to the catheter and is longitudinally movable with respect to the catheter.

23. The embolic protection device of claim 20, wherein a distal portion of the catheter distal to the embolic filter is configured to assume a generally arcuate shape being at least a semi-circle.

24. The embolic protection device of claim 23, wherein the distal portion of the catheter comprises a longitudinally-extending radiopaque marker configured to be arcuate and on a distal-most section of the catheter when the distal portion is in the generally arcuate shape.

25. The embolic protection device of claim 20, wherein the distal opening of the embolic filter is coupled to the side of the catheter and wherein the proximal end of the embolic filter is coupled to the side of the catheter.

26. The embolic protection device of claim 20, further comprising a self-expanding deflector coupled to the catheter proximal to the distal portion, the deflector having a longitudinal axis parallel to a longitudinal axis of the catheter.