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 therebetween, said balloon in fluid communication with an inflation lumen extending axially through the tubular body;
a 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 beyond the working length 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.
177 Citations
64 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 therebetween, said balloon in fluid communication with an inflation lumen extending axially through the tubular body;
a 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 beyond the working length of the balloon. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A radiation delivery device, comprising:
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an elongate flexible tubular body having a proximal end and a distal end;
a substantially inelastic radially expandable support member on the tubular body;
a radiation source carried by the support member; and
an outer tubular sleeve surrounding the radiation source, wherein the sleeve is necked down to the tubular body proximally and distally of the source, and wherein the support member is expanded by means non-removably attached thereto. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. 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 radiation source carried by a substantially inelastic radially expandable support and an outer sleeve surrounding the radiation source, wherein the outer sleeve is necked down to the tubular body proximally and distally of the radiation source, and wherein the support member is expanded by means non-removably attached thereto;
positioning the radiation source within the treatment site;
expanding the expandable support to position the radiation source against the vessel wall;
delivering a circumferentially substantially uniform dose of radiation from the radiation source to the vessel wall; and
thereafter contracting the expandable support and removing said support from the treatment site. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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40. A radiation delivery catheter, comprising:
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an elongate flexible tubular body having a proximal end and a distal end;
a substantially inelastic radially expandable support on the tubular body, wherein the support is expanded by means non-removably attached thereto;
a radiation source carried by the support; and
a cover surrounding the radiation source extending from the body proximally of the source to the body distally of the source. - View Dependent Claims (41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51)
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52. A method of treating a site within a lumen, comprising the steps of:
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identifying a site in a lumen to be treated;
providing a radiation delivery catheter including an elongate flexible tubular body having a radiation source carried by a substantially inelastic radially expandable support and a cover surrounding the radiation source extending from the body proximally of the source to the body distally of the source;
positioning the radiation source within the treatment site;
radially expanding the expandable support using means fixedly attached to the support to position the radiation source against the wall of the lumen;
delivering a circumferentially substantially uniform dose of radiation from the radiation source to the wall; and
radially contracting the expandable support and removing the catheter from the treatment site. - View Dependent Claims (53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64)
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Specification