Patent ID: 8798764
Filing Date: 2014-08-05
Classification: A61N

Abstract:
1. A system comprising: a medical member comprising: a stimulation generator; a sensing module; a processor configured to control the stimulation generator to generate and deliver electrical stimulation via at least one of the segmented stimulation electrodes and configured to control the sensing module to sense a physiological signal of a patient via at least first and second segmented sense electrodes of the plurality of levels of segmented sense electrodes, the first and second segmented sense electrodes being symmetrically arranged relative to the at least one of the segmented stimulation electrodes; and a differential amplifier, wherein the processor is configured to control the sensing module to sense the physiological signal by at least controlling the sensing module to sense a first electrical signal with at least the first segmented sense electrode and sense a second electrical signal with at least one the second segmented sense electrode, and the processor is further configured to input the first and second electrical signals into the differential amplifier to cancel at least one common mode component in the first and second electrical signals, wherein the common mode component is at least partially attributable to substantially simultaneous delivery of electrical stimulation by the stimulation generator with the sensing of the first and second electrical signals by the sensing module, and wherein the differential amplifier outputs the physiological signal.