| 摘要 |
The present invention is directed to an apparatus and method for delivering a drug to a selected site in the vascular system of a patient. More specifically, the apparatus is a balloon catheter (10) comprising an expandable balloon (18) with a pouch (26) around at least a portion of the balloon. When the balloon is not expanded, an agent can be located in the area between the pouch and the balloon. The agent is released through the pouch when the balloon is expanded.
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