Method and apparatus for providing external perfusion lumens on balloon catheters
First Claim
1. A catheter sleeve comprising:
- a flexible tubular body having a proximal end, a distal end, and a central lumen therethrough, wherein at least a portion of the tubular body is radially expansible as a result of a radial expansion force applied in the central lumen within said portion; and
at least one perfusion lumen disposed over said radially expansible portion of the tubular body, wherein said lumen has a plurality of axially spaced-apart ports distributed substantially uniformly over its length which permit blood flow through the lumen.
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Accused Products
Abstract
A catheter sleeve includes a radially expansible distal region having a plurality of axial blood perfusion lumens or channels formed thereon. The catheter sleeve may be introduced over a conventional angioplasty balloon catheter with the expansible region lying over the balloon. When the balloon of the angioplasty catheter is expanded, the perfusion lumens will provide a flow path for blood around the expanded balloon. Optionally, the catheter sleeve may further include drug infusion lumens over the radially expansible region. In this way, drugs can be delivered over prolonged periods while the underlying angioplasty balloon is inflated and blood flows through the lumens or channels to perfuse the distal myocardium.
301 Citations
85 Claims
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1. A catheter sleeve comprising:
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a flexible tubular body having a proximal end, a distal end, and a central lumen therethrough, wherein at least a portion of the tubular body is radially expansible as a result of a radial expansion force applied in the central lumen within said portion; and at least one perfusion lumen disposed over said radially expansible portion of the tubular body, wherein said lumen has a plurality of axially spaced-apart ports distributed substantially uniformly over its length which permit blood flow through the lumen. - View Dependent Claims (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)
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2. A catheter sleeve comprising:
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a flexible tubular body having a proximal end, a distal end, and a central lumen therethrough, wherein at least a portion of the tubular body is radially expansible as a result of a radial expansion force applied in the central lumen within said portion; and one or more channels disposed over said radially expansible portion of the tubular body, wherein the channels define flow paths between the tubular body and a surrounding blood vessel wall.
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29. A method for perfusing blood past a treatment site within a blood vessel, said method comprising:
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positioning a sleeve having a central lumen at said treatment site, said sleeve defining at least one flow path thereover, wherein said flow path provides both axial flow and radially inward and outward flow over substantially its entire length; and applying a radial force within the central lumen to expand the sleeve within the treatment site while blood flows past the expanded sleeve through said at least one flow path and radially in and out of the flow path over substantially the entire expanded length of the sleeve. - View Dependent Claims (30, 31, 32, 33, 34)
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35. A method for delivering a therapeutic agent to a treatment site on an interior wall of a blood vessel, said method comprising:
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positioning a sleeve at said treatment site, said sleeve having a plurality of axial flow paths thereover; radially expanding the sleeve to contact an exterior surface thereof against the interior wall of the blood vessel; and infusing the therapeutic agent through at least some of the flow paths to the blood vessel wall, wherein others of said flow paths establish blood perfusion past the radially expanded sleeve. - View Dependent Claims (36, 37, 38)
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- 39. An improved method for treating a target location within a blood vessel, said method being of the type wherein a balloon is expanded against an interior wall of the blood vessel, wherein the improvement comprises providing radially open perfusion flow paths over an outer surface of the balloon, whereby blood flow is established through said perfusion paths.
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43. A catheter sleeve comprising:
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a flexible tubular body having a proximal end, a distal end, and a central lumen therethrough, wherein at least a portion of the tubular body is axially split to permit radial expansion as a result of a radial expansion force applied in the central lumen within said portion; and means over a radially expansible portion of the tubular body near the distal end for establishing blood perfusion flow. - View Dependent Claims (44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60)
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61. A method for perfusing blood past a treatment site within a blood vessel, said method comprising:
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positioning a sleeve having a central lumen at said treatment site, said sleeve defining at least one flow path thereover and being axially split in the region of the flow path; and applying a radial force within the central lumen to expand the sleeve within the treatment site while blood flows past the expanded sleeve through said at least one flow path, wherein radial expansion causes circumferential separation of the axial split(s). - View Dependent Claims (62, 63, 64, 65, 66, 70)
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67. A catheter sleeve comprising:
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a flexible tubular body having a proximal end, a distal end, and a central lumen therethrough, wherein at least a portion of the tubular body is radially expansible as a result of a radial expansion force applied in the central lumen within said portion; and at least one perfusion lumen integrally formed as a single extrusion as part of the tubular body near the distal end for establishing blood perfusion flow. - View Dependent Claims (68, 69, 71)
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72. A method for perfusing blood past a treatment site within a blood vessel, said method comprising:
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positioning a sleeve having a central lumen at said treatment site, said sleeve including at least one perfusion lumen integrally formed as a single extrusion thereover; and applying a radial force within the central lumen to expand the sleeve within the treatment site while blood flows past the expanded sleeve through said at least one perfusion lumen. - View Dependent Claims (73, 74, 75, 76, 77)
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78. A method for perfusing blood past a treatment site within a blood vessel, said method comprising:
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inflating a balloon catheter to dilate a blood vessel treatment site to an initial inflation perimeter; deflating the balloon; positioning a sleeve having a central lumen over the deflated balloon at said treatment site, said sleeve defining at least one flow path thereover; and reinflating the balloon within the sleeve at low pressure in the range from 0.5 atm to 5 atm for a prolonged period to preserve the initial inflation perimeter of the balloon.
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79. A catheter sleeve comprising:
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a flexible tubular body having a proximal end, a distal end, and a central lumen therethrough, wherein at least a portion of the tubular body is radially expansible as a result of a radial expansion force applied in the central lumen within said portion; means over a radially expansible portion of the tubular body near the distal end for establishing blood perfusion flow; and means over the radially expansible portion of the tubular body near the distal end for infusing therapeutic agents. - View Dependent Claims (80, 81, 82, 83, 84, 85)
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Specification