Optical method and device for determining blood glucose levels
First Claim
1. A method of determining a blood glucose level of a human subject, comprising:
- providing a light pattern which provides a greater amount of stimulation to a first retinal system relative to a second retinal system, resulting in a first;
second stimulation ratio greater than one;
perceiving in the light pattern a characteristic that results from different sensitivities of the first retinal system and the second retinal system to the light pattern; and
determining a blood metabolite level of said subject from the perceived characteristic in the light pattern resulting from different properties of the first retinal system and the second retinal system.
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Abstract
Blood glucose levels of a person are determined by a device which provides a changing light pattern which changes in regard to one or several parameters defining its luminance, color, rate of flicker, spatial contrast, detail content, speed or otherwise provided that the change gradually stimulates one retinal system more than another retinal system. A person observes the changing light pattern until a subjective visual effect occurs, which is preferably an observer perceived dramatic change in the appearance of the light pattern, for example a change in the perceived direction of rotation. The subjective visual effect indicates a specific ratio of stimulation of the two retinal systems, for example the point of balanced stimulation of the two systems. Upon noting the subjective visual effect the patient actuates a mechanism which takes note of the current light pattern parameter values, allowing the device to relate such parameter values with a corresponding blood glucose level using predetermined calibration data. Thereby, the person'"'"'s glucose level is accurately determined in a completely non-invasive manner.
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Citations
25 Claims
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1. A method of determining a blood glucose level of a human subject, comprising:
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providing a light pattern which provides a greater amount of stimulation to a first retinal system relative to a second retinal system, resulting in a first;
second stimulation ratio greater than one;perceiving in the light pattern a characteristic that results from different sensitivities of the first retinal system and the second retinal system to the light pattern; and determining a blood metabolite level of said subject from the perceived characteristic in the light pattern resulting from different properties of the first retinal system and the second retinal system. - View Dependent Claims (2)
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3. A method of determining a blood glucose level of a person, comprising:
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observing a light pattern having a parameter which changes gradually over time; perceiving in the light pattern a subjective visual effect; and indicating a blood glucose level of the person observing the light pattern from the light pattern parameter. - View Dependent Claims (4, 5, 6, 7, 8)
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9. A method of determining a blood glucose level of a person having M-system and P-system retinal systems, comprising:
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observing a light pattern which changes over time with respect to at least one parameter and which stimulates the M-retinal system and the P-retinal system in a changing ratio; perceiving in the light pattern a subjective visual effect; and relating a value of a changing parameter in the light pattern when the subjective visual effect is perceived to a blood glucose level of the person observing the light pattern. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A device for measuring the glucose level of a person, comprising:
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a body member; and a means for generating a light pattern connected to the body member, wherein the light pattern stimulates a first retinal system and a second retinal system in a manner such that an observer will note a subjective visual characteristic in the light pattern which indicates a known blood glucose level of the person. - View Dependent Claims (16, 17)
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18. A device for determining the blood glucose level of a person, comprising:
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a body member; a means for generating a changing light pattern that changes over time with respect to at least one parameter, wherein the light pattern changes in a controlled manner and stimulates two complementary retinal systems in a continuously changing ratio of stimulation; an actuation means which is actuated to indicate the presence of a subjective visual effect, and which initiates measurement of the parameter as the light pattern when actuated; a microprocessor comprising a memory and software programming, which relates measured parameter values to a predetermined blood glucose level; and a means for displaying information about blood glucose levels. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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Specification