| 摘要 |
Apparatus for removing deposits from a selected location on the inner surface of a tubular structure, includes an expansible device introducible into the tubular structure, and at least one scraper cord carried on the outer surface of the expansible device so as to engage the inner surface of the tubular structure upon the expansion of the expansible device, and to be movable therealong to scrape away the deposits from the inner surface of the tubular structure. Preferred embodiments are described in the form of a catheter for removing atheroma or other undesirable deposits from blood vessels, wherein the expansible device is an inflatable balloon, and a flushing device is provided to flush out the scraped away deposits. The catheter preferably includes a plurality of such scraper cords occupying different portions of the inflatable balloon or different layers thereon, and individually movable over the outer surface thereof to produce a controlled and gentle scraping action.
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