Noninvasive blood glucose measuring device

A non-invasive glucose monitoring unit comprising:

• a. a housing means with flexible means to hold said housing means in contact with skin;
• b. a battery in said housing means;
• c. a replaceable strip means and a sealing ring means for said replaceable strip means in said housing;
• d. an oxygen reference cell and a glucose sensing unit, said glucose sensing unit comprising an oxygen measuring cell and a glucose oxidizing enzyme;
• e. a wick means in said housing means whereby clean perspiration may be picked up from the skin and hermetically transported past said oxygen reference cell and means whereby a portion of said clean perspiration may be hermetically transported past said glucose sensing unit with means for contacting said portion of said clean perspiration with said glucose oxidizing enzyme in said glucose sensing unit;
• f. a Wheatstone Bridge circuit means in said housing means and powered by said battery in said housing means wherein an output from said oxygen measuring cell in said glucose sensing unit is compared with said oxygen reference cell with a position of a variable resistor used to zero a null point ammeter indicating glucose concentration in said clean perspiration.

A non-invasive glucose monitoring unit comprising:

• a. a housing means;
• b. a replaceable strip means contained in said housing means;
• c. a sealing ring on said replaceable strip means allowing said housing means to seal said replaceable strip means to a person's skin;
• d. an oxygen reference cell and multiple glucose sensing units formed on said replaceable strip means;
• e. a wick means to collect and hermetically transport perspiration to contact said oxygen reference cell and said multiple glucose sensing units;
• said wick means extending through said housing means allowing evaporation and capillary action to cause said perspiration transport;
• f. an oxygen measuring cell, an oxygen permeable membrane and fixed glucose oxidase comprising each of said multiple glucose sensing units;
• g. a battery means in said housing means;
• h. an indicator means visible through said housing means and electronic circuitry means powered by said battery means and cooperating with said oxygen reference cell, said multiple glucose sensing units, and said indicator means to indicate glucose concentration by difference in output between said oxygen reference cell and said multiple glucose sensing units.

A non-invasive glucose monitoring unit comprising:

• a. an insulating band means with means to fasten said insulating band means close to a persons body;
• b. a replaceable strip fitting under said insulating band means;
• c. a chemical battery, an oxygen reference cell and multiple glucose sensing units formed on said replaceable strip;
• d. a wick means cooperating with said replaceable strip in said insulating band means to collect perspiration formed under said replaceable strip and to transport said perspiration past said oxygen reference cell and past said multiple glucose sensing units;
• said multiple glucose sensing units each comprising an oxygen measuring cell, an oxygen permeable membrane and fixed glucose oxidase membrane;
• e. a group of carbon electrodes each immersed in a plateable solution with each one of said group of electrodes connected with circuitry to compare the difference in electrical output between said oxygen reference cell and said oxygen measuring cells in each of said glucose sensing units by plating individual ones of said group of carbon electrodes;
• said group of carbon electrodes and said circuitry being formed on said replaceable strip.