Multiple layer filamentary devices for treatment of vascular defects
First Claim
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1. A device for implantation within a vascular defect or aneurysm, comprising:
- a self-expanding resilient outer layer including;
a proximal end,a distal end,a longitudinal axis,a plurality of elongate filaments disposed in a woven structure,the outer layer being movable to a radially constrained elongated state configured for delivery within a microcatheter with the elongate filaments extending longitudinally from the proximal end to the distal end radially adjacent each other along a length of the filaments, andthe outer layer being biased to an expanded relaxed state with a longitudinally shortened configuration relative to the radially constrained state with the elongate filaments being bundled and secured relative to each other at the distal end of the outer layer and the elongate filaments being bundled and secured relative to each other at the proximal end of the outer layer, the woven filaments forming a smooth path radially expanded from the longitudinal axis between the proximal end and distal end including a plurality of openings in the outer layer formed between the woven elongate filaments, the outer layer having a distal-most surface end defining a distal contour; and
an inner layer forming an enclosed volume which is disposed within a cavity of the outer layer, the inner layer including a plurality of woven filamentary members which are secured relative to each other at a free distal end of the inner layer and which are secured relative to each other and the proximal end of the outer layer at a proximal end of the inner layer with the free distal end of the inner layer being unsecured to the outer layer such that the inner layer forms a separate lobe from the outer layer and the free distal end of the inner layer can longitudinally shorten independently of the outer layer, the inner layer having a distal-most surface defining a distal contour, the distal contour of the inner layer being the same as the distal contour of the outer layer at least in the expanded relaxed state, an internal gap being established between the distal-most surface of the outer layer and the distal-most surface of the inner layer in the expanded relaxed state, the internal gap being between 5% and 40% of a total longitudinal height of the device measured along a longitudinal axis of the device.
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Abstract
Devices and methods for treatment of a patient'"'"'s vasculature with some embodiments configured for delivery with a microcatheter for treatment of the cerebral vasculature of a patient. Some embodiments may include a permeable shell and inner structure configured to occlude blood flow therethrough.
339 Citations
11 Claims
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1. A device for implantation within a vascular defect or aneurysm, comprising:
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a self-expanding resilient outer layer including; a proximal end, a distal end, a longitudinal axis, a plurality of elongate filaments disposed in a woven structure, the outer layer being movable to a radially constrained elongated state configured for delivery within a microcatheter with the elongate filaments extending longitudinally from the proximal end to the distal end radially adjacent each other along a length of the filaments, and the outer layer being biased to an expanded relaxed state with a longitudinally shortened configuration relative to the radially constrained state with the elongate filaments being bundled and secured relative to each other at the distal end of the outer layer and the elongate filaments being bundled and secured relative to each other at the proximal end of the outer layer, the woven filaments forming a smooth path radially expanded from the longitudinal axis between the proximal end and distal end including a plurality of openings in the outer layer formed between the woven elongate filaments, the outer layer having a distal-most surface end defining a distal contour; and an inner layer forming an enclosed volume which is disposed within a cavity of the outer layer, the inner layer including a plurality of woven filamentary members which are secured relative to each other at a free distal end of the inner layer and which are secured relative to each other and the proximal end of the outer layer at a proximal end of the inner layer with the free distal end of the inner layer being unsecured to the outer layer such that the inner layer forms a separate lobe from the outer layer and the free distal end of the inner layer can longitudinally shorten independently of the outer layer, the inner layer having a distal-most surface defining a distal contour, the distal contour of the inner layer being the same as the distal contour of the outer layer at least in the expanded relaxed state, an internal gap being established between the distal-most surface of the outer layer and the distal-most surface of the inner layer in the expanded relaxed state, the internal gap being between 5% and 40% of a total longitudinal height of the device measured along a longitudinal axis of the device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification
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Current AssigneeMicrovention Incorporated (Terumo Corporation)
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Original AssigneeSequent Medical, Inc. (Terumo Corporation)
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InventorsMarchand, Philippe, Cox, Brian J., Rosenbluth, Robert F., Nolting, John, Dinh, Tan Q., Wilder, Thomas C.
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Primary Examiner(s)Weisberg, Amy R
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Application NumberUS13/439,754Publication NumberTime in Patent Office2,176 DaysField of Search606157, 606200US Class CurrentCPC Class CodesA61B 17/12022 Occluding by internal devic...A61B 17/12113 within an aneurysmA61B 17/12118 for positioning in conjunct...A61B 17/12172 having a pre-set deployed t...A61B 17/12177 comprising additional mater...A61B 2017/00526 Methods of manufacturingA61B 2017/1205 Introduction devicesA61B 2017/22067 Blocking; Occlusion A61B201...
