Systems and methods for detecting tissue contact and needle penetration depth using static fluid pressure measurements
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United States of America Patent
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Nov 5, 2013
Grant Date -
Dec 23, 2004
app pub date -
Sep 5, 2003
filing date -
Jun 10, 2002
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Systems and methods for determining tissue contact and penetration depth are provided. In one aspect, the system includes a needle and a pressure measurement assembly. The needle, in one exemplary embodiment, includes a first end and a second end with at least one aperture located a predetermined distance from the first end. The fluid pressure measurement assembly is connected with a portion of the needle to measure pressure of fluid dispensed in the needle. The fluid pressure measurement assembly measures a first pressure of the fluid, a second pressure when the needle contacts tissue and a third pressure when the needle penetrates the tissue and the aperture becomes occluded.
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