SYSTEMS AND METHODS FOR OBTAINING SUBSTANTIALLY SIMULTANEOUS MULT-CHANNEL IMPEDANCE MEASUREMENTS AND RELATED APPLICATIONS

摘要

An implantable system includes terminals, a pulse generator, a sensing circuit, separate signal processing channels, and first, second and third multiplexers. The terminals are connected to electrodes via conductors of leads. Different subsets of the electrodes are used to define different electrical pulse delivery vectors, and different subsets of the electrodes are used to define different sensing vectors. The pulse generator produces electrical pulses, and the sensing circuit senses a signal indicative of an impedance associated with a selected sensing vector. The first multiplexer selectively connects outputs of the pulse generator to a selected one of the different electrical pulse delivery vectors at a time. The second multiplexer selectively connect inputs of the sensing circuit to a selected one of the different sensing vectors at a time. The third multiplexer selectively connects an output of the sensing circuit to one of the plurality of separate signal processing channels at a time.

主权项

1. An implantable system, comprising:
a plurality of terminals configured to be connected to a plurality of implantable electrodes via electrical conductors of one or more implantable leads,
wherein a plurality of different subsets of the implantable electrodes are used to define a plurality of different electrical pulse delivery vectors, andwherein a plurality of different subsets of the implantable electrodes are used to define a plurality of different sensing vectors; a pulse generator configured to produce one or more electrical pulses for delivery via a selected one of the plurality of different electrical pulse delivery vectors at a time; a sensing circuit configured to sense a signal indicative of an impedance associated with a selected one of the plurality of different sensing vectors at a time; a plurality of separate signal processing channels each configured to perform signal processing on a sensed signal indicative of an impedance obtained using the sensing circuit; a first multiplexer configured to selectively connect outputs of the pulse generator to a selected one of the plurality of different electrical pulse delivery vectors at a time; a second multiplexer configured to selectively connect inputs of the sensing circuit to a selected one of the plurality of different sensing vectors at a time; and a third multiplexer configured to selectively connect an output of the sensing circuit to one of the plurality of separate signal processing channels at a time.