Micromachined actuators/sensors for intratubular positioning/steering
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United States of America Patent
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Jun 30, 1998
Grant Date -
N/A
app pub date -
Sep 25, 1995
filing date -
Sep 25, 1995
priority date (Note) -
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Abstract
Micromachined thin film cantilever actuators having means for individually controlling the deflection of the cantilevers, valve members, and rudders for steering same through blood vessels, or positioning same within a blood vessel, for example. Such cantilever actuators include tactile sensor arrays mounted on a catheter or guide wire tip for navigation and tissues identification, shape-memory alloy film based catheter/guide wire steering mechanisms, and rudder-based steering devices that allow the selective actuation of rudders that use the flowing blood itself to help direct the catheter direction through the blood vessel. While particularly adapted for medical applications, these cantilever actuators can be used for steering through piping and tubing systems.
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