Vascular filters, deflectors, and methods

• US 9,566,144 B2
• Filed: 04/22/2015
• Issued: 02/14/2017
• Est. Priority Date: 04/22/2015
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Claret Medical, Inc. (Boston Scientific Corporation)
• Inventors: Purcell, Cameron Paul, Fifer, Daniel Wayne
• Primary Examiner(s): SHI, KATHERINE MENGLIN
• Application Number:
  US14/693,763
• Publication Number:
  US 20160310255A1
• Time in Patent Office: 664 Days
• Field of Search: 606/191, 606/194, 606/198, 606/200, 623/1.11
• US Class Current: 1/1
• CPC Class Codes: A61B 2018/00351 Heart
• 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 2/2427 Devices for manipulating or deploying heart valves during implantation
• CPC Class Codes: A61F 2002/016 made from wire-like elements
• CPC Class Codes: A61F 2230/0006 circular
• CPC Class Codes: A61F 2230/0015 Kidney-shaped, e.g. bean-shaped
• CPC Class Codes: A61F 2230/0019 rectangular
• CPC Class Codes: A61F 2230/0067 conical
• CPC Class Codes: A61F 2250/006 modular

Abstract

Vascular filters and deflectors and methods for filtering bodily fluids. A blood filtering assembly can capture embolic material dislodged or generated during an endovascular procedure to inhibit or prevent the material from entering the cerebral vasculature. A blood deflecting assembly can deflect embolic material dislodged or generated during an endovascular procedure to inhibit or prevent the material from entering the cerebral vasculature.

Claims

1. A method of inhibiting embolic material from entering cerebral vasculature, the method comprising:

positioning a guidewire in a left subclavian artery upstream of a left vertebral artery;

tracking a distal portion of a protection device over the guidewire, the distal portion of the protection device comprising;

an outer sheath;

an inner member radially inward of the outer sheath, the inner member comprising a guidewire lumen; and

a self-expanding filter assembly radially between the outer sheath and the inner member;

at least one of proximally retracting the outer sheath and distally advancing the self-expanding filter assembly to deploy the self-expanding filter assembly from the outers heath in the left subclavian artery upstream of the left vertebral artery;

after deploying the self-expanding filter assembly, the inner member prolapses into an aortic arch;

performing an endovascular procedure, the deployed self-expanding filter assembly inhibiting embolic material from entering cerebral vasculature through the left vertebral artery during the endovascular procedure; and

after performing the endovascular procedure, withdrawing the self-expanding filter assembly from the left subclavian artery.

2. The method of claim 1, further comprising proximally retracting the inner member out of the aortic arch while the deployed self-expanding filter assembly remains in the left subclavian artery upstream of the left vertebral artery.

3. The method of claim 1, further comprising monitoring arterial pressure using the outer sheath.

4. The method of claim 1, further comprising providing fluid through the outer sheath.

5. The method of claim 1, further comprising positioning a filtering device in an innominate artery and a left common carotid artery, the filtering device inhibiting embolic material from entering cerebral vasculature through a right vertebral artery, a right common carotid artery, and the left common carotid artery during the endovascular procedure.

6. The method of claim 1, wherein the self-expanding filter assembly has a diameter between 7 mm and 12 mm.

7. The method of claim 1, wherein the self-expanding filter assembly has a diameter between 2 mm and 4.5 mm.

8. The method of claim 1, wherein the endovascular procedure being a mitral or aortic valve implantation or replacement.

9. A method of inhibiting embolic material from entering cerebral vasculature, the method comprising:

positioning a distal portion of a protection device at a location, the location being in the left subclavian artery, the distal portion of the protection device comprising;

an outer sheath; and

a self-expanding filter assembly or a self-expanding deflector assembly radially inward of the outer sheath;

an inner member radially inward of the outer sheath, wherein the inner member comprises a guidewire lumen; and

deploying the self-expanding filter assembly or self-expanding deflector assembly from the outer sheath at the location, the deployed self-expanding filter assembly or self-expanding deflector assembly inhibiting embolic material from entering cerebral vasculature during an endovascular procedure; and

after deploying the self-expanding filter assembly or self-expanding deflector assembly, the inner member prolapses into an aortic arch.

10. The method of claim 9, wherein positioning the distal portion of the protection device at the location comprises tracking the distal portion of the protection device over a guidewire.

11. The method of claim 9, further comprising monitoring arterial pressure using at least one of the inner member and the outer sheath.

12. The method of claim 9, wherein the distal portion of the protection device comprises the self-expanding filter assembly.

13. The method of claim 9, wherein the distal portion of the protection device comprises the self-expanding deflector assembly.

14. The method of claim 9, wherein the endovascular procedure comprises atrial valve or mitral valve implantation or replacement.

15. The method of claim 9, wherein deploying the self-expanding filter assembly or self-expanding deflector assembly comprises proximally retracting the outer sheath.

16. The method of claim 9, further comprising proximally retracting the inner member out of the aortic arch while the deployed self-expanding filter assembly or self-expanding deflector assembly remains in the location.

17. The method of claim 9, further comprising positioning a filtering device in an innominate artery and a left common carotid artery, the filtering device inhibiting embolic material from entering cerebral vasculature through a right vertebral artery, a right common carotid artery, and the left common carotid artery during the endovascular procedure.

18. The method of claim 9, wherein the self-expanding filter assembly has a diameter between 7 mm and 12 mm.

19. The method of claim 9, wherein the self-expanding filter assembly has a diameter between 2 mm and 4.5 mm.

20. The method of claim 9, further comprising monitoring arterial pressure.