Ultrasonic instrument
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United States of America Patent
Stats
-
Jan 24, 1995
Grant Date -
N/A
app pub date -
Aug 11, 1992
filing date -
Dec 18, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An ultrasonic invasive instrument such as a biopsy needle has an ultrasonic transducer mounted at one end, with the transducer being electrically coupled to two conductors such as a stylet and central cannula forming the instrument body and transmitting signals from the transducer identifying the instrument's location in a field transmitted by an imaging scanner, the transducer being coupled to at least one of the conductors by an ohmic or capacitive coupling, with for example body fluids serving as the couplant material.
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Family
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Cited Art Landscape
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