Radiation delivery balloon catheter
First Claim
1. A radiation delivery balloon catheter, comprising:
- an elongate flexible tubular body having a proximal end and a distal end;
an inflatable balloon on the tubular body having a proximal end, a distal end and a working length there between, said balloon in fluid communication with an inflation lumen extending axially through the tubular body;
a tubular non-liquid substantially inelastic radiation source secured to the balloon; and
an outer tubular sleeve surrounding the radiation source, wherein the sleeve is necked down to the tubular body proximally and distally of the balloon.
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Accused Products
Abstract
Disclosed is a balloon catheter having an inflatable balloon having a radiation carrier such as a radiation delivery layer thereon. In one embodiment, the radiation delivery layer comprises one or more layers of metal foil, such as gold. The foil is irradiated, and the balloon is thereafter positioned at a treatment site in a vessel and expanded to bring the metal foil layer into close proximity with the vessel wall. In another embodiment, the radiation carrier is in the form of a dopant in the balloon material. Methods of using the balloon include radiation dosing a site following a balloon dilatation or other procedure, and simultaneously performing balloon angioplasty and radiation dosing.
140 Citations
16 Claims
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1. A radiation delivery balloon catheter, comprising:
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an elongate flexible tubular body having a proximal end and a distal end;
an inflatable balloon on the tubular body having a proximal end, a distal end and a working length there between, said balloon in fluid communication with an inflation lumen extending axially through the tubular body;
a tubular non-liquid substantially inelastic radiation source secured to the balloon; and
an outer tubular sleeve surrounding the radiation source, wherein the sleeve is necked down to the tubular body proximally and distally of the balloon. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of treating a site within a vessel, comprising the steps of:
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identifying a site in a vessel to be treated;
providing a radiation delivery catheter including an elongate flexible tubular body having an expandable balloon with a continuous, annular, substantially inelastic radiation delivery layer thereon and an outer sleeve surrounding the radiation delivery layer, wherein the outer sleeve is necked down to the tubular body proximally and distally of the balloon;
positioning the balloon within the treatment site;
inflating the balloon to position the radiation delivery layer against the vessel wall;
delivering a circumferentially substantially uniform dose of radiation from the delivery balloon to the vessel wall; and
thereafter deflating the balloon and removing the balloon from the treatment site. - View Dependent Claims (14)
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15. A method of simultaneously performing balloon dilatation of a stenosis in a body lumen and delivering radiation to the body lumen, comprising the steps of:
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identifying a stenosis in a body lumen;
providing a treatment catheter having an elongate flexible tubular body with an inflatable balloon near the distal end thereof, a cylindrical non liquid substantially inelastic radiation delivery layer on the balloon, and an outer sleeve surrounding the radiation delivery layer wherein the outer sleeve is necked down to the tubular body proximally and distally of the balloon;
percutaneously inserting and transluminally advancing the balloon through the vessel;
positioning the balloon within the stenosis;
inflating the balloon to radially expand the vessel in the area of the stenosis;
simultaneously delivering radiation from the radiation delivery layer to the vessel wall; and
thereafter deflating the balloon and removing the balloon from the lumen. - View Dependent Claims (16)
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Specification