Systems and methods for detecting symptoms of hypoglycemia
First Claim
1. A system for detecting symptoms of hypoglycemia in a diabetic individual, comprising:
- a temperature sensing system for producing a temperature signal representative of a skin temperature of the diabetic individual;
a conductance sensing system for producing a conductance signal representative of a level of perspiration of the diabetic individual;
a trending system responsive to the temperature signal for producing a slope estimate representative of a rate of change of the skin temperature over a predetermined interval;
a threshold system responsive to the conductance signal and to the temperature signal for producing a slope threshold representative of a hypoglycemic decline in skin temperature observed over the predetermined interval; and
an alarm system responsive to the slope estimate and to the slope threshold for producing an indication of the presence of hypoglycemic symptoms.
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Accused Products
Abstract
A system for detecting symptoms of hypoglycemia in a diabetic individual. The system comprises a temperature sensing system, a conductance sensing system, a trending system, a threshold system, and an alarm system. The temperature sensing system produces a temperature signal representative of a skin temperature of the diabetic individual. The conductance sensing system produces a conductance signal representative of a level of perspiration of the diabetic individual. The trending system produces a slope estimate representative of a rate of change of the skin temperature over a predetermined interval in response to the temperature signal. The threshold system produces a slope threshold representative of a hypoglycemic decline in skin temperature observed over the predetermined interval in response to the conductance signal and to the temperature signal. The alarm system produces an indication of the presence of hypoglycemic symptoms in response to the slope estimate and the slope threshold.
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Citations
27 Claims
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1. A system for detecting symptoms of hypoglycemia in a diabetic individual, comprising:
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a temperature sensing system for producing a temperature signal representative of a skin temperature of the diabetic individual; a conductance sensing system for producing a conductance signal representative of a level of perspiration of the diabetic individual; a trending system responsive to the temperature signal for producing a slope estimate representative of a rate of change of the skin temperature over a predetermined interval; a threshold system responsive to the conductance signal and to the temperature signal for producing a slope threshold representative of a hypoglycemic decline in skin temperature observed over the predetermined interval; and an alarm system responsive to the slope estimate and to the slope threshold for producing an indication of the presence of hypoglycemic symptoms. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for detecting symptoms of hypoglycemia in a diabetic individual, comprising:
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a temperature sensing system for producing a temperature signal representative of a skin temperature of the diabetic individual; a conductance sensing system for producing a conductance signal representative of a level of perspiration of the diabetic individual; a signal estimation system responsive to the temperature signal and to the conductance signal for producing a basal conductance reference representative of a basal level of perspiration; a threshold system responsive to the basal conductance reference and to the skin temperature signal for producing a conductance threshold representative of a hypoglycemic level of perspiration; and an alarm system responsive to the conductance signal and to the conductance threshold for producing an indication of the presence of hypoglycemic symptoms. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A system for detecting symptoms of hypoglycemia in a diabetic individual, comprising:
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a temperature sensing system for producing a temperature signal representative of a skin temperature of the diabetic individual; a conductance sensing system for producing a conductance signal representative of a level of perspiration of the diabetic individual; a trending system responsive to the temperature signal for producing a slope estimate representative of a rate of change of the skin temperature over a predetermined interval; a temperature threshold system responsive to the conductance signal and to the temperature signal for producing a slope threshold representative of a hypoglycemic decline in skin temperature observed over the predetermined interval; a temperature alarm system responsive to the slope estimate and to the slope threshold for producing an indication of the presence of hypoglycemic symptoms; a signal estimation system responsive to the temperature signal and to the conductance signal for producing a basal conductance reference representative of a basal level of perspiration; a conductance threshold system responsive to the basal conductance reference and to the temperature signal for producing a conductance threshold representative of a hypoglycemic level of perspiration; a conductance alarm system responsive to the conductance signal and to the conductance threshold for producing an indication of the presence of hypoglycemic symptoms; and a selector system for selecting an operating mode from a plurality of operating modes. - View Dependent Claims (20, 21, 22, 23, 24)
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25. A method of detecting symptoms of hypoglycemia in a diabetic individual, comprising:
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producing a temperature signal representative of a skin temperature of the diabetic individual; producing a conductance signal representative of a level of perspiration of the diabetic individual; producing a slope estimate representative of a rate of change of the skin temperature over a predetermined interval in response to the temperature signal; producing a slope threshold representative of a hypoglycemic decline in skin temperature observed over the predetermined interval in response to the conductance signal and the temperature signal; and producing an indication of the presence of hypoglycemic symptoms in response to the slope estimate and the slope threshold.
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26. A method of detecting symptoms of hypoglycemia in a diabetic individual, comprising:
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producing a temperature signal representative of a skin temperature of the diabetic individual; producing a conductance signal representative of a level of perspiration of the diabetic individual; producing a basal conductance reference representative of a basal level of perspiration in response to the temperature signal and the conductance signal; producing a conductance threshold representative of a hypoglycemic level of perspiration in response to the basal conductance reference and the skin temperature signal; and producing an indication of the presence of hypoglycemic symptoms in response to the conductance signal and the conductance threshold.
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27. A method of detecting symptoms of hypoglycemia in a diabetic individual, comprising:
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producing a temperature signal representative of a skin temperature of the diabetic individual; producing a conductance signal representative of a level of perspiration of the diabetic individual; producing a slope estimate representative of a rate of change of the skin temperature over a predetermined interval in response to the temperature signal; producing a slope threshold representative of a hypoglycemic decline in skin temperature observed over the predetermined interval in response to the conductance signal and the temperature signal; producing an indication of the presence of hypoglycemic symptoms in response to the slope estimate and the slope threshold; producing a basal conductance reference representative of a basal level of perspiration in response to the temperature signal and the conductance signal; producing a conductance threshold representative of a hypoglycemic level of perspiration in response to the basal conductance reference and the temperature signal; producing an indication of the presence of hypoglycemic symptoms in response to the conductance signal and the conductance threshold; and selecting an operating mode from a plurality of operating modes.
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Specification