Bioimpedance ring sensor for physiological monitoring

A system, comprising:

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

A method of monitoring a physiological parameter of a human subject, the method comprising:

• positioning a bioimpedance ring sensor on a finger of the human subject, the bioimpedance ring sensor comprising:
• a ring-shaped body having a central axis, a radially inner annular surface, and a radially outer annular surface;
• a plurality of electrodes positioned on the radially inner annular surface, wherein the plurality of electrodes comprise a plurality of injection electrodes and a plurality of sensing electrodes;
• and
• a controller coupled to the plurality of electrodes;
• directing an electric current to at least one of the plurality of injection electrodes;
• detecting a voltage potential via at least one of the plurality of sensing electrodes;
• and
• determining bioimpedance associated with the human subject based upon the electric current and the voltage potential.