Surgical tool with integrated pressure and flow sensors
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United States of America Patent
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May 25, 2004
Grant Date -
Dec 19, 2002
app pub date -
Jun 8, 2001
filing date -
Jun 8, 2001
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A surgical tool with a rigid body including a needle portion for entering tissue includes a fluid flow channel formed therethrough. A sensor is integrally formed on the tool to detect changing conditions (pressure and/or flow) in the channel. The sensor signal may be used to provide feedback control of pumping of fluid through the channel. The tool may be a micromachined silicon tool with the sensor integrally formed thereon from a silicon nitrate membrane and polysilicon resistors. The tool may be an ultrasonically activated cutting tool, which may be bonded to a package at a node thereof.
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