Patent ID: 7050847

Claim:
A method for non-invasively monitoring a component in a body fluid of a subject, the method comprising: (i) exposing a skin site of the subject at which a measurement is to be made to an aqueous salt solution for a pre-determined first period of time; (ii) (a) removing excess of the solution from the site; (b) measuring impedance at the site; (iii) exposing the site to the solution for a pre-determined second period of time and repeating step (ii); (iv) determining whether the impedance measured in step (iii) falls within a pre-determined range; (v) repeating steps (iii) and (iv) as necessary until the impedance measured in step (iii) falls within the pre-determined range; and (vi) determining the amount of the component in the fluid based upon the impedance measured in step (v).