Flexible catheter
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United States of America Patent
Stats
-
Jan 6, 1998
Grant Date -
N/A
app pub date -
Aug 22, 1996
filing date -
Nov 23, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention provides a catheter capable of delivering drugs or other fluids to a desired remote location in a bodily passageway, such as a small, tortuous artery. The catheter of the invention includes inner and outer tubular layers, and a continuous helical wire coil disposed between the tubular layers along substantially the entire length of the catheter. To enhance trackability and pushability, the wire coil is constructed to provide regions of differing flexibility to the catheter. The wire coil in a first portion of the catheter has a first coil pitch and the wire coil in a second section of the catheter has a second coil pitch which is larger than the first coil pitch to provide the second section of the catheter with greater flexibility than the first section.
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