Radiation delivery catheter
First Claim
Patent Images
1. A radiation delivery catheter for temporarily placing a radioactive source adjacent a vessel wall, comprising:
- an elongate, flexible tubular body, having a proximal end and a distal end;
an axially moveable core, having proximal and distal ends, extending through the tubular body; and
at least one radioactive source in the form of a flexible radioactive sheet on the distal end of the core;
wherein the radioactive sheet is moveable between a first position within the tubular body and a second position outside of the tubular body.
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Accused Products
Abstract
Disclosed is a delivery catheter adapted for delivery of a dose of radiation to a vessel wall. A radiation source is enlargeable from a first, reduced cross-sectional profile to a second, enlarged cross-sectional profile by unwinding around a central core. Following delivery of a radiation dose to the vessel wall, the source is reduced in profile by wrapping around the core and removed from the treatment site.
204 Citations
34 Claims
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1. A radiation delivery catheter for temporarily placing a radioactive source adjacent a vessel wall, comprising:
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an elongate, flexible tubular body, having a proximal end and a distal end; an axially moveable core, having proximal and distal ends, extending through the tubular body; and at least one radioactive source in the form of a flexible radioactive sheet on the distal end of the core; wherein the radioactive sheet is moveable between a first position within the tubular body and a second position outside of the tubular body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A radiation delivery catheter, comprising:
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a first elongate element, having a proximal end and a distal end; a second elongate element moveable with respect to the first element; and a radiation source attached to the second element, said radiation source having first and second ends; wherein rotation of the first end of the radiation source with respect to the second end causes the source to change from a reduced cross-sectional area to an enlarged cross-sectional area. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A radiation delivery catheter, comprising:
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an elongate, flexible tubular body, having a proximal end and a distal end; and a self expandable circumferentially rolled radiation delivery source on the distal end of the delivery catheter.
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16. A method of delivering a dose of radiation to a site in a vessel, comprising the steps of:
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providing a radiation delivery catheter having a self expandable radiation source on a distal end thereof, positioning the radiation source at the site; and permitting the radiation source to self expand at the site; radially reducing the radiation source, and withdrawing the radiation source from the site; wherein the permitting the radiation source to expand step comprises permitting at least one rolled flexible metal element to partially unroll from a reduced cross sectional area for positioning at the site to an enlarged cross sectional area for treating the site. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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23. A method of delivering a dose of radiation to a site in a vessel, comprising the steps of:
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providing a radiation delivery catheter having a thin sheet radiation source on a distal end thereof, positioning the radiation source at the site; expanding the radiation source at the site; radially reducing the radiation source, and withdrawing the radiation source from the site; wherein the expanding the radiation source step comprises at least partially unrolling at least one rolled flexible sheet from a reduced cross sectional area for positioning at the site to an enlarged cross sectional area for treating the site. - View Dependent Claims (24, 25, 26, 27, 28)
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29. A method of delivering radiation to a site in a vessel, comprising the steps of:
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providing a radiation delivery source in the form of a thin sheet having a radioactive isotope thereon; positioning the radiation delivery source at the site; and expanding the radiation delivery source at the site to bring the sheet into contact with the vessel wall; wherein the expanding the radiation delivery source step comprises at least partially unrolling the sheet from a tubular roll having a reduced cross sectional area for positioning at the site to an enlarged cross sectional area for treating the site. - View Dependent Claims (30, 31, 32, 33, 34)
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Specification