Microcoil vaso-occlusive device with multi-axis secondary configuration
First Claim
1. A vaso-occlusive device comprising a filamentous structure formed into a minimum energy state secondary configuration comprising a plurality of interconnected, substantially closed loops of progressively decreasing diameter from a largest loop to a first smallest loop, wherein the device further comprises a second smallest loop immediately adjacent the largest loop, each of the loops defining a discrete axis, whereby the device, in its minimum energy state configuration, defines multiple axes.
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Accused Products
Abstract
A vaso-occlusive device includes a microcoil formed into a minimum energy state secondary configuration comprising a plurality of curved segments, each defining a discrete axis, whereby the device, in its minimum energy state configuration, defines multiple axes. In a preferred embodiment, the secondary configuration-comprises a plurality of interconnected closed loops defining a plurality of discrete axes. In a second embodiment, the secondary configuration defines a wave-form like structure comprising an array of laterally-alternating open loops defining a plurality of separate axes. In a third embodiment, the secondary configuration forms a series of tangential closed loops, wherein the entire structure subtends a first angle of arc, and wherein each adjacent pair of loops defines a second angle of arc. In a fourth embodiment, the secondary configuration forms a logarithmic spiral. In all embodiments, the device, in its secondary configuration, has a dimension that is substantially larger than the largest dimension of the vascular site (i.e., aneurysm) in which it is to be deployed. Thus, confinement of the device within an aneurysm causes it to assume a three-dimensional configuration with a higher energy state than the minimum energy state. Because the minimum energy state configuration of the device is larger (in at least one dimension) than the aneurysm, the deployed device is constrained by its contact with the walls of the aneurysm from returning to its minimum energy state configuration. The engagement of the device with the aneurysm wall minimizes shifting or tumbling due to blood flow. Furthermore, the secondary configuration is not conducive to “coin stacking,” thereby minimizing the compaction experienced.
127 Citations
15 Claims
- 1. A vaso-occlusive device comprising a filamentous structure formed into a minimum energy state secondary configuration comprising a plurality of interconnected, substantially closed loops of progressively decreasing diameter from a largest loop to a first smallest loop, wherein the device further comprises a second smallest loop immediately adjacent the largest loop, each of the loops defining a discrete axis, whereby the device, in its minimum energy state configuration, defines multiple axes.
- 9. A vaso-occlusive device comprising a filamentous element formed into a minimum energy state secondary configuration comprising a plurality of interconnected, substantially closed loops of progressively decreasing diameter from a largest loop to a first smallest loop, and wherein the device further comprises a second smallest loop immediately adjacent the lamest loop, each of the loops defining a plane and a discrete axis that is substantially perpendicular to the plane.
Specification
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- Resources
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Current AssigneeMicrovention Incorporated (Terumo Corporation)
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Original AssigneeMicrovention Incorporated (Terumo Corporation)
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InventorsSchaefer, Dean, Rosenbluth, Robert F., Cox, Brian J., Ferrera, David A., Fitz, Matthew, Greene, George R. Jr.
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Primary Examiner(s)HO, UYEN T
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Application NumberUS10/043,947Publication NumberTime in Patent Office1,565 DaysField of Search606/200, 606/191, 606/194, 623/1.15, 623/1.22, 623/1.2, 623/1.18, 623/1.21, 128/830US Class Current606/200CPC Class CodesA61B 17/12022 Occluding by internal devic...A61B 17/12113 within an aneurysmA61B 17/12145 having a pre-set deployed t...A61B 2017/00526 Methods of manufacturingA61B 2017/00867 shape memory effect for pro...
