Aortic dissection septal cutting tool

• US 9,387,039 B2
• Filed: 07/13/2015
• Issued: 07/12/2016
• Est. Priority Date: 11/17/2009
• Status: Active Grant

• Current Assignee: W. L. Gore & Associates (W.L. Gore & Associates)
• Original Assignee: W. L. Gore & Associates (W.L. Gore & Associates)
• Inventors: Bliss, Cody L., Cully, Edward H., Dake, Michael D., Greene, Joel M., Lovekamp, Joshua J., Nilson, Michael C., Patel, Himanshu J., Williams, David M., Witort, William P.
• Primary Examiner(s): Severson, Ryan J
• Assistant Examiner(s): DANG, ANH TIEU
• Application Number:
  US14/798,209
• Publication Number:
  US 20150313626A1
• Time in Patent Office: 365 Days
• US Class Current: 1/1
• CPC Class Codes: A61B 17/320016 Endoscopic cutting instruments, e.g. arthroscopes, resectoscopes A61B10/0233, A61B17/29, A61B17/3207 take precedence
• CPC Class Codes: A61B 17/3201 Scissors for biopsy A61B10/02
• CPC Class Codes: A61B 17/32075 Pullback cutting; combined forward and pullback cutting, e.g. with cutters at both sides of the plaque
• 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 18/18 by applying electromagnetic radiation, e.g. microwaves radiation therapy A61N5/00
• CPC Class Codes: A61B 2017/00778 Operations on blood vessels A61B2017/22097, A61B2017/320741 take precedence
• CPC Class Codes: A61B 2017/22052 eccentric
• CPC Class Codes: A61B 2017/22069 Immobilising; Stabilising

Abstract

The present invention relates to methods of using medical cutting tools for treating aortic septal dissections.

Claims

1. A method of treating an aortic dissection comprising:

providing a medical cutting tool for cutting a tissue wall of a false lumen of a vessel, said medical cutting tool comprising;

a catheter having an outer catheter tube, said outer catheter tube having a longitudinally extending lumen, said catheter having an inner member extending through said lumen;

at least one displacement element having a first end attached to said inner member of said catheter and an opposite second end attached to said outer catheter tube, such that a middle portion of said at least one displacement element between said first and second ends can be displaced radially in response to relative axial movement between said inner member and said outer catheter tube;

a cutting edge attached to said middle portion of said at least one displacement element and which displaces radially with said middle portion in response to relative axial movement between said inner member and outer catheter tube;

a collar attached to each of said first and second ends of said at least one displacement element, wherein said collar on said first end of said at least one displacement element is attached to said inner member of said catheter and said collar on said second end of said at least one displacement element is attached to said outer catheter tube; and

a hook fixedly secured to said middle portion of said at least one displacement element, said hook having an atraumatic surface, said cutting edge formed along a portion of said hook opposite said atraumatic surface;

placing said catheter within an arterial system;

advancing said catheter through said arterial system to a location distal to a primary entry tear of said aortic dissection;

contacting aortic tissue with said at least one displacement element;

engaging said cutting edge of said hook with a septum; and

advancing said cutting edge along said septum.

2. The method of claim 1 including cannulating a guidewire from said catheter through a hole in a tissue of said aortic dissection into a false lumen delimited by septal tissue prior to advancing said catheter.

3. The method of claim 1 including radially displacing said hook relative to said catheter by axially moving said inner member and said outer catheter tube relative to each other.

4. The method of claim 1 further comprising removing said catheter from said arterial system.