Insitu formable and self-forming intravascular flow modifier (IFM) and IFM assembly for deployment of same
First Claim
1. An intravascular flow modifier (IFM) for use in a vessel, the vessel having an interior surface, the IFM comprising:
- an outer layer formed of a strand, said strand being formed of a shape memory material, said strand having a pre-deployed configuration that is substantially linear, and said strand having a deployed configuration of a longitudinally oriented coil of adjacent substantially circular helical loops extending between a first end and a second end of said outer layer, said outer layer adapted to be secured in the vessel in said deployed configuration by at least some of said helical loops pressing against a portion of the interior surface of the vessel; and
an inner layer formed of a strand, said strand being formed of a shape memory material, said strand having a pre-deployed configuration that is substantially linear, and said strand having a deployed configuration of a longitudinally oriented coil of adjacent substantially circular helical loops extending between a first end and a second end of said inner layer, at least a portion of said outer layer surrounding at least a portion of said inner layer in said deployed configuration so that at least some of said loops of said outer layer overlap and contact at least some of said loops of said inner layer no more than twice for each of said loops, wherein said outer layer and said inner layer are connected to form a continuous strand, and wherein said first end of said outer layer is connected to said second end of said inner layer to form a loop.
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Accused Products
Abstract
An intravascular flow modifier (IFM) for use in a vessel has an outer layer formed of a strand configured as a longitudinally oriented coil of adjacent helical loops extending between a first end and a second end of the outer layer. The outer layer is secured in the vessel by at least some of the helical loops pressing against a portion of the interior surface of the vessel. The IFM also has an inner layer formed of a strand configured as a longitudinally oriented coil of adjacent helical loops extending between a first end and a second end of the inner layer. At least a portion of the outer layer surrounds at least a portion of the inner layer so that at least some of the loops of the outer layer overlap and contact at least some of the loops of the inner layer An assembly and method for deploying are also disclosed.
360 Citations
48 Claims
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1. An intravascular flow modifier (IFM) for use in a vessel, the vessel having an interior surface, the IFM comprising:
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an outer layer formed of a strand, said strand being formed of a shape memory material, said strand having a pre-deployed configuration that is substantially linear, and said strand having a deployed configuration of a longitudinally oriented coil of adjacent substantially circular helical loops extending between a first end and a second end of said outer layer, said outer layer adapted to be secured in the vessel in said deployed configuration by at least some of said helical loops pressing against a portion of the interior surface of the vessel; and
an inner layer formed of a strand, said strand being formed of a shape memory material, said strand having a pre-deployed configuration that is substantially linear, and said strand having a deployed configuration of a longitudinally oriented coil of adjacent substantially circular helical loops extending between a first end and a second end of said inner layer, at least a portion of said outer layer surrounding at least a portion of said inner layer in said deployed configuration so that at least some of said loops of said outer layer overlap and contact at least some of said loops of said inner layer no more than twice for each of said loops, wherein said outer layer and said inner layer are connected to form a continuous strand, and wherein said first end of said outer layer is connected to said second end of said inner layer to form a loop. - 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, 24, 25, 26, 27)
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28. An intravascular flow modifier (IFM) for use in a vessel, the vessel having an interior surface, the IFM comprising:
a continuous length of strand having a pre-deployed substantially linear configuration and a deployed configuration formed as a longitudinally oriented coil surrounding another longitudinally oriented coil, said coils forming an outer layer of adjacent substantially circular helical loops, said outer layer adapted to urge against a portion of the interior surface of the vessel, said helical loops of said inner layer urging against said loops of said outer layer at crossing points, no more than twice for each of said loops, said continuous length of strand forming at least one end loop.
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29. An intravascular flow modifier (IFM) for use in a vessel, the vessel having an interior surface, the IFM comprising:
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an outer layer formed of a strand having a first end, a second end opposite said first end, and having a pre-deployed configuration that is substantially linear and a deployed configuration in the form of a longitudinally oriented coil of adjacent helical loops between said first and second ends, said outer layer adapted to be secured in the vessel in said deployed configuration by at least some of said helical loops pressing against a portion of the interior surface of the vessel;
an inner layer formed of a strand having a first end, a second end opposite said first end, and having a pre-deployed configuration that is substantially linear and a deployed configuration in the form of a longitudinally oriented coil of adjacent loops between said first and second ends, at least a portion of said outer layer in its deployed configuration surrounding at least a portion of said inner layer in its deployed configuration so that at least some of said loops of said outer layer overlap and contact at least some of said loops of said inner layer no more than twice for each of said loops, said strand of said outer and inner layers being a continuous strand formed of a high shape memory alloy, said helical loops of said outer and inner layers being substantially circular in said respective deployed configurations, said second end of said outer layerjoining said first end of said inner layer to form a loop, said first end of said outer layer and said second end of said inner layer being distal ends relative to an insertion point into the vessel, said second end of said outer layer and said first end of said inner layer being proximal ends relative to an insertion point into the vessel, said helical loops of said outer and inner layers winding in a predetermined direction.
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30. An intracranial intravascular flow modifier (IFM) for use in a cranial vessel, the vessel having an interior surface, the IFM comprising:
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an outer layer formed of a strand having a first end, a second end opposite said first end, and having a pre-deployed configuration that is substantially linear and a deployed configuration in the form of a longitudinally oriented coil of adjacent helical loops between said first and second ends, said outer layer adapted to be secured in the vessel in said deployed configuration by at least some of said helical loops pressing against a portion of the interior surface of the vessel;
an inner layer formed of a strand having a first end, a second end opposite said first end, and having a pre-deployed configuration that is substantially linear and a deployed configuration in the form of a longitudinally oriented coil of adjacent helical loops between said first and second ends, at least a portion of said outer layer in its deployed configuration surrounding at least a portion of said inner layer in its deployed configuration so that at least some of said loops of said outer layer overlap and contact at least some of said loops of said inner layer no more than twice for each of said loops, said strand of said outer and inner layers being a continuous strand formed of a high shape memory alloy, said helical loops of said outer and inner layers being substantially circular in said respective deployed configurations, said second end of said outer layer joining said first end of said inner layer to form a loop, said first end of said outer layer and second end of said inner layer being distal ends relative to an insertion point into the vessel, said second end of said outer layer and first end of said inner layer being proximal ends relative to an insertion point into the vessel, said IFM having an outside diameter of between about 1.5 and 12 mm. - View Dependent Claims (31)
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32. An assembly for an intravascular repair of a defect of a body vessel, the vessel having an interior surface, the assembly comprising:
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an elongated first catheter;
an intravascular flow modifier (IFM) having a deployed configuration when in the vessel at a site of the defect and a pre-deployed substantially linear configuration for movement through said first catheter;
said IFM in said deployed configuration including an outer layer formed of a strand, said strand being configured as a longitudinally oriented coil of adjacent substantially circular helical loops extending between a first end and a second end of said outer layer, once deployed said outer layer adapted to be secured in the vessel by at least some of said loops urging against a portion of the interior surface of the vessel, and an inner layer formed of a strand, said strand being configured as a longitudinally oriented coil of adjacent substantially circular helical loops extending between a first end and a second end of said inner layer, once deployed in the vessel at the site of the defect at least a portion of said outer layer surrounding at least a portion of said inner layer so that at least some of said loops of said outer layer overlap and contact at least some of said loops of said inner layer no more than twice for each of said loops, wherein said outer layer and said inner layer are connected to form a continuous strand, and wherein said first end of said outer layer is connected to said second end of said inner layer to form a loop; and
said first catheter having a proximal end, a distal end, and a central lumen extending axially therethrough, said lumen having a size and shape complementary to the pre-deployed configuration of said IFM such that said IFM is axially slidable therethrough. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40)
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41. An assembly for an intravascular repair of a defect of a body vessel, the vessel having an interior surface, the assembly comprising:
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an intravascular flow modifier (IFM) having a deployed configuration when in the vessel at a site of the defect and a pre-deployed substantially linear configuration for movement through the vessel towards the site of the defect;
said IFM in said deployed configuration including an outer layer formed of a strand, said strand being configured as alongitudinally oriented coil of adjacent substantially circular helical loops extending between a first end and a second end of said outer layer, once deployed said outer layer adapted to be secured in the vessel by at least some of said loops urging against a portion of the interior surface of the vessel, and an inner layer formed of a strand, said strand being configured as a longitudinally oriented coil of adjacent substantially circular helical loops extending between a first end and a second end of said inner layer, once deployed in the vessel at the site of the defect at least a portion of said outer layer surrounding at least a portion of said inner layer so that at least some of said loops of said outer layer overlap and contact at least some of said loops of said inner layer no more than twice for each of said loops, wherein said outer layer and said inner layer are connected to form a continuous strand, and wherein said first end of said outer layer is connected to said second end of said inner layer to form a loop; and
a means for moving and maintaining said IFM when in the pre-deployed configuration, the outer and inner layers of said IFM taking the deployed configuration when the moving and maintaining means is no longer applied thereto. - View Dependent Claims (42, 43, 44, 45, 46, 47)
an elongated first catheter having a proximal end, a distal end, and a central lumen extending axially therethrough, said lumen having a size and shape complementary to the respective size and shape of said IFM when in the pre-deployed configuration such that said IFM is axially slidable therein; and
an elongated second catheter having a proximal end, a distal end, and a central lumen extending axially therethrough, said lumen having a size and shape complementary to said first catheter such that said first catheter is axially slidable therein, and such that at least a portion of said distal end of said first catheter can be inserted into said lumen of said second catheter at said proximal end and passes through said lumen of said second catheter and exits said second catheter at said distal end.
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45. The IFM of claim 41, and further comprising means for selectively varying the gap between said adjacent helical loops of said outer and inner layers.
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46. The IFM of claim 45, wherein said selectively varying means comprises:
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an elongated first catheter having a proximal end, a distal end, and a central lumen extending axially therethrough, said lumen having a size and shape complementary to the respective size and shape of said IFM when in the pre-deployed configuration such that said IFM is axially slidable therein;
an elongated second catheter having a proximal end, a distal end, and a central lumen extending axially therethrough, said lumen having a size and shape complementary to said first catheter such that said first catheter is axially slidable therein, and such that at least a portion of said distal end of said first catheter can be inserted into said lumen of said second catheter at said proximal end and passes through said lumen of said second catheter and exits said second catheter at said distal end; and
means for controlling axial movement of said IFM when in the pre-deployed configuration through said first catheter and out of said distal end of said first catheter.
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47. The IFM of claim 46, wherein said controlling means includes means for controlling the axial movement of said IFM and said first catheter.
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48. An assembly for an intravascular repair of a defect of a cranial vessel, the vessel having an interior surface, the assembly comprising:
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an elongated first catheter;
an intravascular flow modifier (IFM) having a deployed configuration when in the vessel at a site of the defect and a pre-deployed substantially linear configuration for movement through said first catheter;
said IFM in said deployed configuration including an outer layer formed of a strand, said strand being configured as a longitudinally oriented coil of adjacent substantially circular helical loops extending between a first end and a second end of said outer layer, once deployed said outer layer adapted to be secured in the vessel by at least some of said loops urging against a portion of the interior surface of the vessel, and an inner layer formed of a strand, said strand being configured as a longitudinally oriented coil of adjacent substantially circular helical loops extending between a first end and a second end of said inner layer, once deployed in the vessel at the site of the defect at least a portion of said outer layer surrounding at least a portion of said inner layer so that at least some of said loops of said outer layer overlap and contact at least some of said loops of said inner layer no more than twice for each of said loops, said IFM having a deployed diameter of between about 1.5 and about 12 mm, wherein said outer layer and said inner layer are connected to form a continuous strand, and wherein said first end of said outer layer is connected to said second end of said inner layer to form a loop;
said first catheter having a proximal end, a distal end, and a central lumen extending axially therethrough, said lumen having an inside diameter of between about 0.004 and about .006 inches to receive the pre-deployed configuration of said IFM such that said IFM is axially slidable therethrough; and
a second catheter having a distal end, a proximal end, and a central lumen extending axially therethrough, said lumen of said second catheter having an inside diameter of at least about 0.022 inches to receive said first catheter such that said first catheter is axially slidable therein, and such that at least a portion of said distal end of said first catheter can be inserted into said lumen of said second catheter at said proximal end and passes through said lumen of said second catheter and exits said second catheter at said distal end.
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Specification