Drug delivery device with instable sheath and/or push element
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United States of America Patent
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Apr 22, 2014
Issued Date -
N/A
app pub date -
Jun 6, 2012
filing date -
Jun 7, 2011
priority date (Note) -
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Abstract
A balloon carries a drug in drug-carrying regions, wherein the drug-carrying regions protect the drug during delivery through a patient's vasculature. Once at a target site, the balloon expands, causing the drug-carrying regions to expose the drug to the target site. One drug eluting balloon device includes a longitudinal sheath that defines an interior space having a balloon disposed therein. When the balloon expands, at least one push element at least partially inverts at least one pocket formed on an outer surface of the sheath. This inversion causes a drug contained within the at least one pocket to be released to the target site. In another embodiment, a plurality of bands is provided, each band made of material having a different resistance to elongation. Upon expansion, the bands invert to expose a drug provided on a surface of the bands.
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