Aortic dissection septal cutting tool
First Claim
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1. A 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 displacing 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.
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Abstract
The present invention relates to methods of using medical cutting tools for treating aortic septal dissections.
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Citations
6 Claims
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1. A medical cutting tool comprising:
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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 displacing 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. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification