Insitu formable and self-forming intravascular flow modifier (IFM), catheter and IFM assembly, and method 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 configured as a longitudinally oriented coil of adjacent helical loops extending between a first end and a second end of said outer layer, said outer layer being secured in the vessel 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 configured as a longitudinally oriented coil of adjacent 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 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.
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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.
99 Citations
101 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 configured as a longitudinally oriented coil of adjacent helical loops extending between a first end and a second end of said outer layer, said outer layer being secured in the vessel 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 configured as a longitudinally oriented coil of adjacent 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 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. - 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, 28, 29, 30, 31, 32, 33)
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34. An intravascular flow modifier (IFM) for use in a vessel, the vessel having an interior surface, the IFM comprising:
a continuous length of strand formed as a longitudinally oriented coil surrounding another longitudinally oriented coil, said coils forming an outer layer of adjacent helical loops surrounding an inner layer of adjacent helical loops, said outer layer urging 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.
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35. 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 a longitudinally oriented coil of adjacent helical loops between said first and second ends, said outer layer being secured in the vessel 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 having a first end, a second end opposite said first end, and a longitudinally oriented coil of adjacent loops between said first and second ends, 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, said strand of said outer and inner layers being a continuous strand formed of a high shape memory alloy and having a cross-section, the cross-section being one of circular, oval, rectangle, and triangular, said helical loops of said outer and inner layers being substantially circular, said second end of said outer layer joining said first end of said inner layer, 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 wind in a predetermined direction.
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36. 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 a longitudinally oriented coil of adjacent helical loops between said first and second ends, said outer layer being secured in the vessel 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 having a first end, a second end opposite said first end, and a longitudinally oriented coil of adjacent helical loops between said first and second ends, 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, 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, said second end of said outer layer joining said first end of said inner layer, 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 (37)
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38. An intravascular flow modifier (IFM) for use in a vessel, the vessel having an interior surface having a defect, the IFM comprising:
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at least one outer helical loop formed of a strand, said outer loop being secured in the vessel by at least some portion of said helical loop pressing against a portion of the interior surface of the vessel; and
at least one inner helical loop formed of a strand, at least some portion of said outer helical loop surrounding at least a portion of said inner helical loop so that at least some of said outer helical loop overlaps and contacts at least some of said inner helical loop. - View Dependent Claims (39)
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40. 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 IFM having a deployed configuration when in the vessel at a site of the defect and a pre-deployed configuration for movement through said first catheter;
said IFM including an outer layer formed of a strand, said adjacent helical loops extending between a first end and a second end of said outer layer, once deployed said outer layer being 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 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; 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 (41, 42, 43, 44, 45, 46, 47, 48)
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49. 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 IFM having a deployed configuration when in the vessel at a site of the defect and a pre-deployed configuration for movement through the vessel towards the site of the defect;
said IFM including an outer layer formed of a strand, said strand being configured as a longitudinally oriented coil of adjacent helical loops extending between a first end and a second end of said outer layer, once deployed said outer layer being 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 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; 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 (50, 51, 52, 53, 54, 55)
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56. 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 IFM having a deployed configuration when in the vessel at a site of the defect and a pre-deployed configuration for movement through said first catheter;
said IFM including an outer layer formed of a strand, said strand being configured as a longitudinally oriented coil of adjacent helical loops extending between a first end and a second end of said outer layer, once deployed said outer layer being secured in the vessel by at least some of said loops urging against a portion of said interior surface of the vessel, and an inner layer formed of a strand, said strand being configured as a longitudinally oriented coil of adjacent 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, said IFM having a deployed diameter of between about 1.5 and about 12 mm;
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 0.006 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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57. A method of forming an intravascular flow modifier (IFM) at a pre-selected segment of a vessel, said IFM having a first portion comprising an outer layer of strand and a second portion comprising an inner layer of strand, the vessel having an interior surface, the method comprising the steps of:
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moving said IFM through a catheter up to the pre-selected segment of the vessel;
manipulating at least one of said outer layer of strand and said catheter to deploy said outer layer of strand in the pre-selected segment of vessel as a longitudinally oriented coil of adjacent helical loops; and
manipulating at least one of said inner layer of strand and said catheter to deploy said inner layer of strand in the pre-selected segment of vessel as a longitudinally oriented coil of adjacent helical loops within said first portion of said IFM. - View Dependent Claims (58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86)
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87. A method of forming an IFM at a pre-selected segment of a vessel, the vessel having an interior surface, the method comprising the steps of:
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straightening said IFM to a substantially linear configuration;
providing an angiographic catheter, a guide catheter, and a micro-catheter, each of said catheters having a distal end, a proximal end, and a central lumen extending axially therethrough;
inserting said angiographic catheter into the vessel;
inserting said micro-catheter into said guide catheter, and said guide catheter into said angiographic catheter;
inserting said IFM into said micro-catheter;
positioning said distal end of said angiographic catheter at a predetermined location in the vessel proximal to the pre-selected segment of the vessel;
advancing at least a portion of said distal end of said guide catheter through said angiographic catheter and exiting said angiographic catheter at said distal end;
positioning said guide catheter in the vessel with the distal end of said guide catheter being oriented between the pre-selected segment of the vessel and said distal end of said angiographic catheter;
advancing at least a portion of said distal end of said micro-catheter through said guide catheter and exiting said guide catheter at said distal end;
moving said IFM through said micro-catheter up to the pre-selected segment of the vessel;
manipulating at least one of said outer layer of strand and said catheter to deploy said outer layer of strand in the pre-selected segment of vessel as a longitudinally oriented coil of adjacent helical loops; and
manipulating at least one of said inner layer of strand and said catheter to deploy said inner layer of strand in the pre-selected segment of vessel as a longitudinally oriented coil of adjacent helical loops within said first portion of said IFM. - View Dependent Claims (88, 89, 90, 91, 92, 93)
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94. A method of forming an IFM at a pre-selected segment of a vessel, the vessel having an interior surface, the method comprising the steps of:
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straightening said IFM to a substantially linear configuration;
providing a guide catheter and a micro-catheter, each of said catheters having a distal end, a proximal end, and a central lumen extending axially therethrough;
inserting said micro-catheter into said guide catheter;
inserting said guide catheter into the vessel;
inserting said IFM into said micro-catheter;
positioning said guide catheter in the vessel with the distal end of said guide catheter being oriented between the pre-selected segment of the vessel and an insertion point into the vessel;
advancing at least a portion of said distal end of said micro-catheter through said guide catheter and exiting said guide catheter at said distal end;
moving said IFM through said micro-catheter up to the pre-selected segment of the vessel; and
manipulating said layer of strand and said catheter to deploy said outer layer of strand in the pre-selected segment of vessel as a longitudinally oriented coil of adjacent helical loops. - View Dependent Claims (95, 96, 97, 98, 99, 100, 101)
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Specification