| 摘要 |
A method and an apparatus are provided for delivery of radiation in vivo. A device includes a seal located proximal to a balloon through which a cavity of the balloon is inflated with a composition including a radioactive compound. The seal includes a passage therethrough which provides the only access to the balloon cavity and terminates at the proximal end of the balloon. The passage through the seal provides fluid communication with an inflation lumen within the medical device lumen, wherein a ratio of an inner diameter of the inflatable member to an inner diameter of the inflation lumen is about 0.5 or greater. In such a construction, inflation and evacuation can be accomplished without contamination of the entire medical device lumen. Thus, substantially all of the solution including the radioactive compound can be evacuated from the balloon cavity after treatment due to the positioning of the passage in the seal.
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