Hydration monitor
AssigneeInova Design Solutions Ltd
InventorLeon Thomas Lee Marsh
Life of this patent
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Abstract
A hydration monitor includes a temperature sensor (20; 65) for measuring a subject's core body temperature and a processor (30). The processor is arranged to accept measurements from the temperature sensor (20; 65) and calculate a hydration level in dependence on changes in the measured core body temperature.
Claims16
A hydration monitor comprising a temperature sensor for measuring a subject's core body temperature and a processor, the processor being arranged to accept measurements from the temperature sensor and calculate a hydration level in dependence on changes in the measured core body temperature by the following formula:
- [(core body temperature current−core body temperature normal)×subject's weight]/(a value between 0.10° C. and 0.23° C.×100).
A method of measuring hydration of a subject wherein the following steps are performed with a hydration monitor having a processor:
- a. measuring an initial core body temperature of the subject;
- b. measuring a subsequent current core body temperature of the subject;
- c. subtracting the initial core body temperature from the subsequent core body temperature, thereby obtaining a difference;
- d. multiplying the difference by the subject's weight using the processor, thereby obtaining a multiplied difference;
- e. dividing the multiplied difference by a value between 0.10° C. and 0.23° C., thereby obtaining an indication of the subject's hydration level;
- f. providing output indicative of the subject's hydration level from the hydration monitor to the subject.
A portable hydration monitor including:
- a. a wearable temperature sensor having:
- (1) an earpiece worn on the ear for measuring a subject's core body temperature via the subject's tympanic membrane, and
- (2) a transmitter configured to communicate said measured core body temperature;
- and
- b. a remote unit to be carried or worn by the subject and including a receiver, a processor, and an output device wherein:
- (1) the receiver is configured to receive the communicated core body temperature from the transmitter and communicate the received core body temperature to the processor,
- (2) the processor is configured to:
- i. calculate the subject's hydration level from the measured core body temperature in substantially real time, and
- ii. cause an indication of the hydration level to be output via the output device.
Dependencies are inferred from the claim text.