Steerable variable stiffness device
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United States of America Patent
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-
Jul 2, 1996
Issued Date -
N/A
app pub date -
Aug 1, 1994
filing date -
Jun 11, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An apparatus includes a flexible tubular member containing a shape-memory tube formed to include a lumen extending along the central axis of the tubular member. A liner sleeve extends through the lumen of the shape-memory tube and lies inside the tubular member. A control system selectively heats the shape-memory tube to its activated state causing the shape-memory tube to move toward a predetermined shape if it is different than its present configuration. Whether the shape-memory tube moves or not, it will increase significantly in stiffness, both axial and bending to help retain, hold, or wedge the apparatus in place in a selected body cavity while catheters or other objects are passed through a lumen in the liner sleeve.
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