Methods and apparatus for inducing controlled renal neuromodulation
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United States of America Patent
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May 3, 2011
Grant Date -
Mar 22, 2007
app pub date -
Oct 18, 2005
filing date -
Nov 2, 2004
priority date (Note) -
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Abstract
Methods and apparatus are provided for inducing, monitoring and controlling renal neuromodulation using a pulsed electric field to effectuate electroporation or electrofusion. In some embodiments, tissue impedance, conductance or conductivity may be monitored to determine the effects of pulsed electric field therapy, e.g., to determine an extent of electroporation and its degree of irreversibility. Pulsed electric field electroporation of tissue causes a decrease in tissue impedance and an increase in tissue conductivity. If induced electroporation is reversible, upon cessation of the pulsed electric field, tissue impedance and conductivity should approximate baseline levels; however, if electroporation is irreversible, impedance and conductivity changes should persist. Thus, monitoring of impedance or conductivity may be utilized to determine the onset of electroporation and to determine the type or extent of electroporation. Furthermore, monitoring data may be used in one or more manual or automatic feedback loops to control the electroporation.
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