Balloon catheter apparatus and method
First Claim
1. A surgical device for controlling the expansion and shape of a body conduit, said surgical device comprising:
- an outer tube having a longitudinal axis extending between a proximal end and a distal end;
an inner member extending coaxially within said outer tube, said inner member longitudinally slidable within said outer tube and configured such that a longitudinal passageway is created between said inner member and said outer tube for passage of a fluid therethrough;
a balloon disposed coaxially about said inner member, said balloon having a proximal balloon end connected to said distal end of said outer tube and a distal balloon end connected to said inner member to define an annular balloon chamber in fluid connection with said longitudinal passageway, said balloon having properties for inflating and deflating in response to the fluid passing through the longitudinal passageway; and
an outer sleeve surrounding said balloon, said sleeve having a proximal sleeve end connected to said distal end of said outer tube and a distal sleeve end connected to the distal end of said inner member such that said outer sleeve is radially expandable and collapsible independent of said balloon through movement of the inner member relative to the outer tube.
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Accused Products
Abstract
A surgical device for cleaning and removing obstructing material from within a vascular conduit or other bodily passageway. The device comprises a balloon catheter having an independently operable outer woven sleeve having a plurality of mesh openings. The woven sleeve surrounds the radially expandable and contractible balloon. In one embodiment, the outer woven sleeve is configured into a predetermined shape through manipulation of the catheter and used to maintain the inflated balloon within that predetermined configuration. In another embodiment, the woven sleeve is radially expanded by the inflated balloon such that the woven mesh is driven into the vascular conduit. The woven sleeve may be used to abrade the surface of the vascular conduit and increase the flow passage or alternatively as traction for various other surgical procedures within the vascular conduit.
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Citations
39 Claims
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1. A surgical device for controlling the expansion and shape of a body conduit, said surgical device comprising:
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an outer tube having a longitudinal axis extending between a proximal end and a distal end;
an inner member extending coaxially within said outer tube, said inner member longitudinally slidable within said outer tube and configured such that a longitudinal passageway is created between said inner member and said outer tube for passage of a fluid therethrough;
a balloon disposed coaxially about said inner member, said balloon having a proximal balloon end connected to said distal end of said outer tube and a distal balloon end connected to said inner member to define an annular balloon chamber in fluid connection with said longitudinal passageway, said balloon having properties for inflating and deflating in response to the fluid passing through the longitudinal passageway; and
an outer sleeve surrounding said balloon, said sleeve having a proximal sleeve end connected to said distal end of said outer tube and a distal sleeve end connected to the distal end of said inner member such that said outer sleeve is radially expandable and collapsible independent of said balloon through movement of the inner member relative to the outer tube. - View Dependent Claims (2)
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3. A balloon catheter for enlarging a flow passage within a vascular conduit, said balloon catheter comprising:
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a catheter tube having a longitudinal axis extending between a proximal end and a distal end;
an inner member extending coaxially within said catheter tube, said inner member being longitudinally slidable within said catheter tube and being configured such that a longitudinal passageway is created between said inner member and said catheter tube for passage of a fluid therethrough;
a balloon disposed coaxially about said inner member, said balloon having a proximal balloon end connected to said distal end of said catheter tube and a distal balloon end connected to said inner member to define an annular balloon chamber in fluid connection with said longitudinal passageway, said balloon having properties for inflating and deflating in response to the fluid passing through the longitudinal passageway; and
an outer sleeve disposed about said balloon, said sleeve having a proximal sleeve end connected to said distal end of said catheter tube and a distal sleeve end connected to said inner member such that said outer sleeve is radially expandable and collapsible independent of said balloon through movement of the inner member relative to the catheter tube. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A balloon catheter for enlarging a flow passage in a body conduit, said catheter comprising:
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a catheter tube having a longitudinal axis extending between a proximal end and a distal end;
an inner tubular member disposed coaxially within said catheter tube, said inner tubular member being longitudinally slidable within said catheter tube and configured to provide a longitudinal passageway between said inner tubular member and said catheter tube for passage of a fluid therethrough;
a balloon disposed coaxially about said inner tubular member, said balloon having a proximal balloon end connected to said distal end of said catheter tube and a distal balloon end connected to said inner tubular member to define an annular balloon chamber; and
an outer sleeve surrounding said balloon, said sleeve having a proximal sleeve end connected to said distal end of said catheter tube and a distal sleeve end connected to said inner member such that said outer sleeve is radially expandable and collapsible independent of said balloon through movement of the inner member relative to the catheter tube. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A surgical device for cleaning and removing obstructions from a vascular conduit, said surgical device comprising:
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a catheter having a longitudinal axis extending between a proximal end and a distal end;
an inflatable and deflatable balloon, coaxial with said catheter and coupled to said catheter adjacent said distal end of said catheter; and
an outer tubular sleeve surrounding said balloon and having a sleeve proximal end and a sleeve distal end, said sleeve being radially expandable independent of said balloon and having an irregular outer surface for contacting said vascular conduit; and
at least one of said sleeve proximal end and said sleeve distal end being coupled to said catheter.- View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
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29. A balloon catheter for enlarging a flow passage within a vascular conduit, said balloon catheter comprising:
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a catheter tube having a longitudinal axis extending between a proximal end and a distal end;
an inner member extending co-axially within said catheter tube, said inner member being longitudinally slidable within said catheter tube;
a balloon disposed co-axially about said inner member, said balloon having a proximal balloon end connected to said distal end of said catheter tube and a distal balloon end connected to said inner member to define at least one annular balloon chamber having properties for inflating and deflating in response to a fluid passing through the catheter tube; and
an outer sleeve disposed about said balloon, said sleeve having a proximal sleeve end connected to said distal end of said catheter tube and a distal sleeve end connected to said inner member, the outer sleeve being radially expandable independent of said balloon through movement of the inner member relative to the catheter tube to a predetermined configuration including a pair of spaced-apart annular chambers.
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30. A method for using a balloon catheter to enlarge a flow passage within a body conduit, said method comprising the steps of:
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providing a catheter having an inflatable balloon and an expandable outer mesh sleeve disposed about said balloon;
inserting said catheter into the vascular conduit;
expanding the mesh into contact with the vascular conduit;
independently of the expanding step, inflating the balloon into contact with the expanded mesh sleeve;
deflating the balloon;
contracting the mesh sleeve; and
removing the balloon catheter from the vascular conduit. - View Dependent Claims (31, 32, 33, 34)
the expanding step includes the step of expanding the sleeve to a predetermined configuration; and
the inflating step includes a step of limiting the shape of the balloon to the predetermined configuration of the mesh sleeve.
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35. A method for removing an obstruction from a vascular conduit comprising the steps of:
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providing a balloon catheter having a radially expandable woven mesh sleeve disposed about a distensible balloon and a pair of coaxial tubular shafts comprising an inner shaft and an outer shaft, wherein said inner shaft is coupled to a distal end of the mesh sleeve and said outer shaft is coupled to a proximal end of said mesh sleeve such that movement of said inner shaft relative to said outer shaft expands and collapses said woven mesh sleeve;
inserting the balloon catheter into the vascular conduit;
directing the catheter along the vascular conduit until the mesh sleeve is disposed adjacent the obstruction;
moving the inner shaft relative to the outer shaft to enlarge said mesh sleeve into a predetermined configuration;
inflating said balloon to expand the balloon to the predetermined configuration of the woven mesh sleeve;
moving the catheter with the mesh sleeve against the obstruction to remove at least a portion of the obstruction from the vascular conduit;
deflating the balloon to collapse the balloon within the vascular conduit;
moving the inner shaft relative to the outer shaft to collapse said woven mesh sleeve; and
removing the balloon catheter from the vascular conduit. - View Dependent Claims (36)
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37. A method for cleaning a flow passage within an artificial graft conduit comprising the steps of:
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providing a balloon catheter having an inflatable inner balloon and a coaxial woven mesh sleeve surrounding said balloon, said inner balloon being inflatable to expand said mesh sleeve against said vascular graft;
placing the balloon catheter within said artificial vascular graft conduit;
expanding the mesh sleeve into contact with the vascular graft;
independently of the expanding step, inflating the balloon into contact with the mesh sleeve;
deflating the balloon to facilitate the independent collapse of the mesh sleeve; and
removing the balloon catheter from the artificial graft conduit. - View Dependent Claims (38, 39)
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Specification