MULTIPLE-ELECTRODE ELECTRICAL IMPEDANCE SENSING BIOPSY SAMPLING DEVICE AND METHOD
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United States of America Patent
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Issued Date -
Feb 5, 2015
app pub date -
Aug 2, 2013
filing date -
Aug 2, 2013
priority date (Note) -
Abandoned
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Abstract
A biopsy sampling device has an inner trocar having a sampling opening, an outer needle with 4 or more electrodes on it, an impedance measuring apparatus coupled to drive current through a first and a second electrode, while measuring voltages through a third and fourth electrodes to measure an impedance of tissue adjacent to the electrodes, the inner trocar slideably engaged within the central cavity of the outer needle such that its sharpened tip and sampling opening can protrude from an end of the outer needle and be removed to capture a sample in the sampling opening. The device is used to obtain biopsy samples by advancing the device into an organ while observing impedance of tissue near or adjacent the device before the operator withdraws the trocar to obtain a biopsy sample of an inclusion in the organ.
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