Retrieval systems and methods for use thereof
First Claim
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1. A medical device for removing an obstruction from a body passage, the medical device comprising:
- at least one leading wire having a first end and a second end;
a capturing portion having a surface extending between an open proximal end and a permeable distal end;
where the at least one leading wire extends through an interior of the capturing portion and diverges to form the permeable distal end, the at least one leading wire extends back in a proximal direction to form the capturing portion; and
where the surface of the capturing portion comprises a translating surface formed of the at least one leading wire and a capturing surface, each being configured so that the at least one leading wire causes a translating surface axial strength to be greater than a capturing surface axial strength, wherein application of a tensile force on the at least one leading wire causes axial compression of the capturing surface before causing axial compression and deformation of the translating surface as the capturing portion engages the obstruction.
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Accused Products
Abstract
The devices and methods described herein relate to improved structures for removing obstructions from body lumens. Such devices have applicability in through-out the body, including clearing of blockages within the vasculature, by addressing the frictional resistance on the obstruction prior to attempting to translate and/or mobilize the obstruction within the body lumen.
286 Citations
23 Claims
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1. A medical device for removing an obstruction from a body passage, the medical device comprising:
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at least one leading wire having a first end and a second end; a capturing portion having a surface extending between an open proximal end and a permeable distal end; where the at least one leading wire extends through an interior of the capturing portion and diverges to form the permeable distal end, the at least one leading wire extends back in a proximal direction to form the capturing portion; and where the surface of the capturing portion comprises a translating surface formed of the at least one leading wire and a capturing surface, each being configured so that the at least one leading wire causes a translating surface axial strength to be greater than a capturing surface axial strength, wherein application of a tensile force on the at least one leading wire causes axial compression of the capturing surface before causing axial compression and deformation of the translating surface as the capturing portion engages the obstruction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification