Method for delivering radiation therapy to an intravascular site in a body
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United States of America Patent
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May 1, 2001
Grant Date -
N/A
app pub date -
Feb 8, 1999
filing date -
Feb 8, 1999
priority date (Note) -
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Abstract
An intravascular device such as a stent is placed in a plasma source ion implantation (PSII) chamber wherein a plasma of radioactive ions is introduced to surround the device. A negative potential is applied to the stent to accelerate the ions towards the device and implant them into the surface of the device, thereby rendering the device radioactive. The stent is next deployed intravascularly within a patient's body to maintain the patency of a blood vessel and irradiate the surrounding tissue to prevent the development of restenosis.
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