Patent ID: 8315808

Claim:
A urine sugar meter having a function of estimating a urine sugar condition or a blood sugar condition, said urine sugar meter comprising: a urine sugar sensor, microcomputer and display means, said urine sugar sensor operatively connected to said microcomputer, and said microcomputer connected to said display means; said microcomputer comprised of a memory means, clock means, and an arithmetical and control means; said arithmetical and control means configured to: (1) measure a urine sugar value A at a time of day using said urine sugar sensor, and store said urine sugar value A together with said time and day in said memory means; (2) obtain an averaged value X of measured urine sugar values stored in said memory means, said urine sugar values measured during a past predetermined period of time, wherein said urine sugar values were measured at the same time of day as said urine sugar value A's time of day; (3) discriminate whether or not said urine sugar value A is less than a discriminating method classification boundary value stored in said memory means; (4) when said urine sugar value A is less than the discriminating method classification boundary value, calculate a difference (X−A) between said average value X and urine sugar value A; (5) when said difference (X−A) is not less than a positive discriminating reference difference stored in said memory means, discriminate said difference as a decrease in urine sugar value or blood sugar value, and display said difference discrimination decrease on said display means; (6) when said urine sugar value A is not less than said discriminating method classification boundary value, calculate a ratio (A/X) between said urine sugar value A and said averaged value X; and (7) when said ratio (A/X) is not greater than a first discriminating reference ratio stored in said memory means, discriminate said ratio as a decrease in urine sugar value or a blood sugar value, and display said ratio discrimination decrease on said display means.