Retrieval systems and methods for use thereof
First Claim
Patent Images
1. A medical device retrieval system for securing an obstruction within a vessel lumen and for use with a catheter configured to be navigated through the vasculature, the device comprising:
- an elongated stent comprising a plurality of struts, the stent being collapsible for positioning in the catheter during delivery and having an expanded profile such that when expanded the struts are configured to engage the obstruction;
a shaft fixedly attached to the elongated stent and having a flexibility to navigate through tortuous anatomy;
a cover having a distal end coupled to a proximal end of the elongated stent, a cover wall defining a cavity and extending along the shaft, and a proximal end being moveable relative to the shaft, where the cover is collapsible for positioning in the catheter during delivery and self expands upon deployment from the catheter such that a portion of the cover expands outward against a vessel wall; and
where the cover is axially pliable such that when the device is deployed in the vessel and frictional forces are applied against the cover, proximal movement of the shaft and elongated stent cause inversion of the fluid permeable cover wall such that the cover wall everts over the elongated stent, where the cover is self-collapsing when inverted.
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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.
319 Citations
25 Claims
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1. A medical device retrieval system for securing an obstruction within a vessel lumen and for use with a catheter configured to be navigated through the vasculature, the device comprising:
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an elongated stent comprising a plurality of struts, the stent being collapsible for positioning in the catheter during delivery and having an expanded profile such that when expanded the struts are configured to engage the obstruction; a shaft fixedly attached to the elongated stent and having a flexibility to navigate through tortuous anatomy; a cover having a distal end coupled to a proximal end of the elongated stent, a cover wall defining a cavity and extending along the shaft, and a proximal end being moveable relative to the shaft, where the cover is collapsible for positioning in the catheter during delivery and self expands upon deployment from the catheter such that a portion of the cover expands outward against a vessel wall; and where the cover is axially pliable such that when the device is deployed in the vessel and frictional forces are applied against the cover, proximal movement of the shaft and elongated stent cause inversion of the fluid permeable cover wall such that the cover wall everts over the elongated stent, where the cover is self-collapsing when inverted. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A medical device retrieval system for securing an obstruction within a vessel lumen and for use with a catheter configured to be navigated through the vasculature, the device comprising:
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a capturing structure configured to engage the obstruction for removal from the vessel lumen; a shaft fixedly attached to the capturing structure and having a flexibility to navigate through tortuous anatomy; a cover having a distal end coupled adjacent to a proximal end of the capturing structure, a cover wall defining a cavity and extending along the shaft, and a proximal end being moveable relative to the shaft, where the cover is collapsible for positioning in the catheter during delivery and self-expands upon deployment from the catheter such that a portion of the cover expands outward against a vessel wall; and where the cover is axially pliable such that when the device is deployed in the vessel and frictional forces are applied against the cover, proximal movement of the shaft and capturing structure cause inversion of the fluid permeable cover wall such that the cover wall everts over the capturing structure. where the cover is self-collapsing when inverted. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25)
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Specification