Abstract: A bioimpedance ring sensor configured to be worn on a finger of a human subject. The bioimpedance ring sensor may include a ring-shaped body having a central axis, a radially inner annular surface, and a radially outer annular surface. The bioimpedance ring sensor may also include a plurality of electrodes positioned on the radially inner annular surface. The plurality of electrodes may include injection electrodes and sensing electrodes. The bioimpedance ring sensor may also comprise a controller coupled to the plurality of electrodes. The controller may be configured to direct an electric current to at least one of the injection electrodes, to detect a voltage potential via at least one of the of sensing electrodes, and to determine bioimpedance associated with the human subject based upon the electric current and the voltage potential.

Abstract: A system for monitoring one or more physiological parameters includes a plurality of patches positionable at a plurality of locations on a surface of a body, wherein the plurality of patches are electrically isolated from each other, wherein a first patch of the plurality of patches includes a transmitter configured to inject an electrical signal into the body at a first location on the surface of the body, and wherein a second patch of the plurality of patches includes a sensor configured to detect a bio-impedance signal at a second location on the surface of the body that is spaced from the first location, and wherein the bio-impedance signal is induced within the body by the electrical signal injected from the first patch which is electrically isolated from the second patch.