Surgery – Diagnostic testing – Measuring electrical impedance or conductance of body portion
Reexamination Certificate
2005-04-19
2005-04-19
Robinson, Daniel (Department: 3742)
Surgery
Diagnostic testing
Measuring electrical impedance or conductance of body portion
C604S508000
Reexamination Certificate
active
06882879
ABSTRACT:
An impedance spectroscopy system for monitoring ischemic mucosal damage in hollow viscous organs comprises a sensor catheter and an impedance spectrometer for electrically driving the catheter to obtain a complex tissue impedance spectrum. Once the catheter is in place in one of a patient's hollow viscous organs, the impedance spectrometer obtains the complex impedance spectrum by causing two electrodes in the tip of the catheter to inject a current into the mucosal tissue at different frequencies, while two other electrodes measure the resulting voltages. A pattern recognition system is then used to analyze the complex impedance spectrum and to quantify the severity of the mucosal injury. Alternatively, the complex impedance spectrum can be appropriately plotted against the spectrum of normal tissue, allowing for a visual comparison by trained personnel.
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Rigaud B et al., “Bioelectrical Impedance Techniques in Medicine”, Critical Reviews in Biomedial Engineering, CRC Press, Boca Raton, FL, US, vol. 24, No. 4-6, 1996, pp. 257-336.
Holland & Bonzagni, P.C.
Holland, Esq. Donald S.
Innovamedica S.A. de C.V.
Robinson Daniel
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