Expandable and retrievable radiation delivery system
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United States of America Patent
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-
Feb 2, 1999
Grant Date -
N/A
app pub date -
Mar 6, 1997
filing date -
Mar 6, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A device and method for irradiating human body vessel interior walls. One device includes a beta radiation emitting segmented metal tube disposed at the distal end of an elongate shaft. Another device includes a radioactive elastic sleeve mounted on a shaft. The device can be used to inhibit restenosis following angioplasty in coronary arteries. In use, the device can be advanced distally over the balloon portion of a positioned and deflated angioplasty balloon catheter, whereupon the balloon is inflated, pressing the radiation device into close contact with vessel walls. After a desired exposure period, the balloon is deflated, and the device, biased to contract, contracts with the balloon, allowing for ease of withdrawal from the patient.
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