Dual catheter radiation delivery system
First Claim
1. A radiation delivery system, comprising:
- a sheath catheter, having proximal and distal ends;
a first inflatable balloon on a distal end of the sheath catheter, wherein said first balloon does not include a radiation source;
at least one lumen extending through the sheath catheter from the proximal end and communicating with the first balloon; and
a source catheter axially movably positionable in the lumen, and having a radiation source thereon, wherein the radiation source is moveable from a first position having a reduced cross-sectional profile to facilitate advancement through the lumen to a second position having an enlarged cross-sectional profile.
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Accused Products
Abstract
Disclosed is a dual catheter radiation delivery system, for delivering a dose of radiation to a treatment site, typically in a body lumen. The system comprises an outer sheath catheter, having an inflatable balloon thereon. The system further comprises an inner radiation delivery catheter, having a radially expandable structure such as a balloon with a radiation source thereon. The sheath catheter is positioned such that the sheath balloon is at the treatment site, and the radiation delivery catheter is transluminally advanced through the sheath catheter such that the radiation source is positioned within the sheath balloon. The radiation delivery balloon is inflated within the sheath balloon, to position the radioactive source near the vessel wall. The source may comprise a thin film carried by the radiation delivery balloon, having a radioactive isotope implanted therein or chemically bonded thereto. Alternatively, the radioactive isotope may be implanted within or adhered to the radiation delivery balloon.
151 Citations
9 Claims
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1. A radiation delivery system, comprising:
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a sheath catheter, having proximal and distal ends; a first inflatable balloon on a distal end of the sheath catheter, wherein said first balloon does not include a radiation source; at least one lumen extending through the sheath catheter from the proximal end and communicating with the first balloon; and a source catheter axially movably positionable in the lumen, and having a radiation source thereon, wherein the radiation source is moveable from a first position having a reduced cross-sectional profile to facilitate advancement through the lumen to a second position having an enlarged cross-sectional profile. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A radiation delivery system for delivering a dose of radiation to a site in a mammal, comprising:
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an elongate flexible tubular body, having proximal and distal ends; a first balloon having proximal and distal ends on a distal portion of the tubular body, wherein the distal end of the tubular body is spaced proximally apart from the distal end of the balloon, and said first balloon does not include a radiation source; at least one lumen extending through the tubular body and communicating with the balloon; and a radiation source carried on a second inflatable balloon, said second inflatable balloon advanceable through the lumen.
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Specification