Apparatus and method for sensing force
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United States of America Patent
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Dec 27, 2011
Grant Date -
May 13, 2010
app pub date -
Nov 12, 2008
filing date -
Nov 12, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
A medical system comprises a medical probe including an elongated probe body, a lumen extending within the probe body, an axially flexible section, and a push-pull rod slidably disposed within the lumen. The system comprises a ditherer mechanically coupled to the rod for cyclically displacing it axially back and forth within the lumen, such that the ends of the probe body are axially displaced relative to each other via the axially flexible section. The system further comprises a sensor for sensing a force axially applied to the distal end of the probe body. A method comprises introducing a medical probe into a patient, axially dithering the distal end of the medical probe back and forth relative to the proximal end of the medical probe, and sensing a force applied between tissue of the patient and the distal end of the medical probe while the distal end is axially dithered.
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