Patent ID: 8185182

Claim:
Apparatus for noninvasive measuring of blood glucose level comprising: a first digit encircling liquid chamber with a first electrode assembly affixed to an inner surface of an outer wall of the chamber, the first electrode assembly including a first pair of spaced-apart signal electrodes and a pair of electrodes positioned beside the first pair of spaced-apart signal electrodes through which an electric current is fed into the chamber; a second digit encircling liquid chamber with a second electrode assembly affixed to an inner surface of an outer wall of the chamber, the second electrode assembly including a second pair of spaced-apart signal electrodes and a pair of electrodes positioned beside the second pair of spaced-apart signal electrodes through which an electric current is fed into the chamber; liquid in the first chamber having electrical conductivity substantially equal to electrical conductivity of fluid in the digit; liquid in the second chamber having electrical conductivity substantially more than the electrical conductivity of fluid in the digit; and pulsatile signal processing circuitry connected to the first and second pairs of signal electrodes to compare electrical signals on the two pairs of signal electrodes to calibration signals received during known glucose levels to thereby distinguish between normal glucose concentration, high glucose concentration, and low glucose concentration.