Tissue structure identification in advance of instrument
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United States of America Patent
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Oct 25, 2011
Grant Date -
Feb 3, 2005
app pub date -
Apr 11, 2002
filing date -
Apr 11, 2001
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method and apparatus for identifying tissue structures in advance of a mechanical medical instrument during a medical procedure. A mechanical tissue penetrating medical instrument (22) has a distal end for penetrating tissue in a penetrating direction. An optical wavefront analysis system (32-50) provides light to illuminate tissue ahead of the medical instrument and receives light returned by tissue ahead of the medical instrument. An optical fiber (30) is coupled at a proximal end to the wavefront analysis system and attached at a distal end to the medical instrument proximate the distal end of the medical instrument. The distal end of the fiber has an illumination pattern directed substantially in the penetrating direction for illuminating the tissue ahead of the medical instrument and receiving light returned therefrom. The wavefront analysis system provides information about the distance from the distal end of the medical instrument to tissue features ahead of the medical instrument.
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