Patent ID: 9456763
Filing Date: 2016-10-04
CPC Classification: A61B

Claim Text:
1. An implantable medical device, comprising: a pair of electrodes; a biopotential sensing module coupled to the pair of electrodes and configured to acquire a biopotential signal present at the pair of electrodes at a first sampling rate; an impedance monitoring module comprising a drive signal circuit coupled to the pair of electrodes and configured to deliver a drive signal from the drive signal circuit to the pair of electrodes and acquire a bioimpedance signal across the pair of electrodes at a second sampling rate; a control module configured to control the first sampling rate of the biopotential signal and to control the impedance monitoring module to transition from an off state to an on state during a period of continuous sampling of the biopotential signal at the first sampling rate by enabling an onset of the drive signal that is synchronized to at least one of a leading edge and a trailing edge of a sampling cycle of the first sampling rate.