Expandable intravascular occlusion material removal devices and methods of use
First Claim
1. An intravascular device for removing vascular occlusion material within a vascular lumen in a patient, wherein the occlusion material defines a configuration, the intravascular device comprising:
- an expandable material removal element having first and second ends and including a plurality of wires disposed between the first and second ends;
a catheter shaft extending to the first end of the expandable material removal element;
a drive shaft for energizing the material removal element intravascularly;
the drive shaft having a proximal end and a distal end, the drive shaft being connected to the second end of the material removal element proximate the distal end of the drive shaft extending through the material removal element and being shiftable with respect to the material removal element and the catheter shaft;
the drive shaft being disposed within the catheter shaft;
the material removal element being expandable responsive to shifting of the drive shaft; and
the expandable removal element being sufficiently deformable so that the element assumes a configuration corresponding to the configuration defined by the non-occluded diameter upon expansion of the element; and
a collection portion disposed on the material removal element for collecting removed occlusion material, the collection portion including a retention member disposed on the wires of the removal element.
2 Assignments
0 Petitions
Accused Products
Abstract
An intravascular occlusion material removal device for removing vascular occlusion material in a vascular lumen comprises an expandable material removal element movable between an expanded position and a contracted position. The material removal element has a distal end and a proximal end. A drive shaft is operatively connected to the distal end of the expandable material removal element for rotating the removal element. A catheter surrounds a portion of the drive shaft. The catheter has a distal end for operatively variably contacting the proximal end of the material removal element such that the removal element is rotatable with respect to the catheter. The catheter is shiftable with respect to the drive shaft for moving the material removal element between the expanded position and the contracted position. A number of novel methods for removing vascular occlusion material are also provided. One such method comprises the steps of: providing a vascular occlusion material removal device having an expandable occlusion material removal element, wherein the removal element comprises a plurality of braided wires, further comprising an abrasive disposed on the wires; providing a drive shaft disposed in and shiftable with respect to the removal element; intravascularly positioning the removal element distally of the occlusion material; shifting the drive shaft with respect to the removal element to expand the element intravascularly; and moving the removal element proximally within the vascular lumen to remove occlusion material. The removal element can also be moved distally within the vascular lumen to engage the occlusion material. Also, removed occlusion material can be collected by a collection portion on the removal element.
645 Citations
63 Claims
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1. An intravascular device for removing vascular occlusion material within a vascular lumen in a patient, wherein the occlusion material defines a configuration, the intravascular device comprising:
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an expandable material removal element having first and second ends and including a plurality of wires disposed between the first and second ends; a catheter shaft extending to the first end of the expandable material removal element; a drive shaft for energizing the material removal element intravascularly;
the drive shaft having a proximal end and a distal end, the drive shaft being connected to the second end of the material removal element proximate the distal end of the drive shaft extending through the material removal element and being shiftable with respect to the material removal element and the catheter shaft;
the drive shaft being disposed within the catheter shaft;
the material removal element being expandable responsive to shifting of the drive shaft; and
the expandable removal element being sufficiently deformable so that the element assumes a configuration corresponding to the configuration defined by the non-occluded diameter upon expansion of the element; anda collection portion disposed on the material removal element for collecting removed occlusion material, the collection portion including a retention member disposed on the wires of the removal element. - View Dependent Claims (2, 3)
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4. A method for removing occlusion material from a vascular lumen within a patient comprising the steps of:
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a) providing an occlusion material removal device having an expandable material removal element, a single rotatable drive shaft and a catheter shaft, the removal element having first and second ends, the catheter shaft extending to the first end and the drive shaft being connected to the second end, the single rotatable drive shaft extending through the material removal element, and the material removal element being variably expandable responsive to shifting of the single rotatable drive shaft with respect to the removal element and the catheter shaft; b) navigating the material removal element distally through the occlusion material; c) shifting the single rotatable drive shaft with respect to the material removal element and the catheter shaft thereby expanding the removal element; and d) moving the expanded material removal element proximally within the vascular lumen to engage the occlusion material. - View Dependent Claims (5, 6, 7)
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8. A vascular occlusion material removal device for removing vascular occlusion material in a vascular lumen, the removal device comprising:
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an expandable material removal element having a distal end and a proximal end insertable intravascularly into a patient; a catheter shaft extending to the proximal end of the removal element; a drive shaft disposed through the removal element and connected to the distal end of the expandable material removal element;
the drive shaft being shiftable within the material removal element;
the material removal element being expandable responsive to shifting of the drive shaft with respect to the removal element and the catheter shaft;
the drive shaft being disposed within the catheter shaft;a plurality of braided wires comprising the removal element; and an abrasive disposed on the wires for removing vascular occlusion material. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A vascular occlusion material removal device for removing vascular occlusion material in a vascular lumen, the removal device comprising:
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an expandable material removal element insertable intravascularly into a patient, the removal element having first and second ends; a catheter shaft extending to the first end; a drive shaft disposed through and connected to the second end of the expandable material removal element for energizing the removal element;
the drive shaft being disposed within the catheter shaft;
the drive shaft being shiftable with respect to the material removal element and the catheter shaft;
the material removal element being expandable responsive to shifting of the drive shaft;a plurality of braided wires comprising the removal element; and
the wires being made from a super-elastic alloy. - View Dependent Claims (17)
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18. A method for removing vascular occlusion material from a vascular lumen comprising the steps of:
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providing a vascular occlusion material removal device having an expandable occlusion material removal element, the removal element having first and second ends, the removal element including a plurality of braided wires and an abrasive disposed on the wires; providing a catheter shaft extending to the first end of the removal element; providing a drive shaft disposed in and connected to the second end of the removal element, the drive shaft being shiftable with respect to the removal element and the catheter shaft; intravascularly positioning the removal element distally of the occlusion material; shifting the drive shaft with respect to the removal element and the catheter shaft to expand the element intravascularly; and moving the removal element proximally within the vascular lumen to remove occlusion material. - View Dependent Claims (19)
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20. A vascular occlusion material removal device for removing vascular occlusion material in a vascular lumen, the material removal device comprising:
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an expandable material removal element movable between an expanded position and a contracted position having a distal end and a free-wheeling proximal end; a catheter shaft having a proximal and a distal end extending to the free-wheeling proximal end of the removal element; a drive shaft operatively connected to the distal end of the expandable material removal element to rotate the removal element, the drive shaft being shiftable with respect to the removal element and the catheter shaft to move the removal element between the expanded position and the contracted position, the distal end of the catheter shaft surrounding a portion of the drive shaft; and a bearing surface located at the distal end of the catheter variably engageable with the free-wheeling proximal end of the removal element to move the removal element between the expanded position and the contracted position. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A method for removing vascular occlusion material from a vascular lumen comprising the steps of:
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a) providing a vascular occlusion material removal device having an expandable occlusion material removal element, the material removal element having first and second ends;
a catheter shaft extending to the first end of the removal element;
a drive shaft disposed in and connected to the second end of the material removal element;
the material removal element being expandable responsive to shifting of the drive shaft with respect to the removal element and the catheter shaft;
the catheter shaft surrounding a portion of the drive shaft;b) intravascularly navigating the removal element to the occlusion material; c) energizing the removal element to remove occlusion material; d) supplying a first pressure through the drive shaft; e) supplying a second pressure through the catheter; and f) generating a pressure differential with the first pressure and the second pressure within the vascular lumen sufficient to draw removed occlusion material into the catheter. - View Dependent Claims (38, 39)
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40. A method for removing vascular occlusion material from a vascular lumen comprising the steps of:
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a) providing a vascular occlusion material removal device having an expandable occlusion material removal element, the material removal element having first and second ends;
a catheter shaft extending to the first end of the removal element; and
a drive shaft operably connected to the second end of the removal element wherein the removal element includes a plurality of braided wires, including an abrasive disposed on the wires;b) intravascularly navigating the removal element to the occlusion material; c) energizing the removal element to remove occlusion material; d) supplying a first pressure through the drive shaft; e) supplying a second pressure through the catheter shaft; and f) generating a pressure differential with the first pressure and the second pressure within the vascular lumen sufficient to draw removed occlusion material into the catheter. - View Dependent Claims (41, 42)
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43. A vascular occlusion material removal device for removing vascular occlusion material in a vascular lumen, the material removal device comprising:
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a) an expandable material removal element having a first and a second end and including a plurality of braid wires generally disposed between the first and second ends of the removal element, and the expandable material removal element being movable between an expanded position and a contracted position; b) a drive shaft connected to the first end of the expandable material removal element for rotating the removal element; c) a catheter surrounding a portion of the drive shaft;
the catheter having a distal end for operatively variably contracting the second end of the material removal element such that the removal element is rotatable with respect to the catheter; and
the catheter being shiftable with respect to the drive shaft for moving the material removal element between the expanded position and the contracted position. - View Dependent Claims (44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63)
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Specification