Analysis and regulation of food intake
First Claim
1. Apparatus comprising:
- one or more antral sensors, configured to be applied to an antrum of a subject, and to generate an antral signal; and
a control unit, configured to;
detect ingestion of food by the subject,determine antral impedance responsively to the antral signal, andinterpret a change in antral impedance vs. a as line value of less than a threshold value as indicating that the ingested food is predominantly solid.
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Accused Products
Abstract
Apparatus (18, 18′) is provided, which includes one or more fundic sensors (74), configured to be applied to a fundus of a subject (10), and to generate a fundic signal. The apparatus further includes a control unit (90), which is configured to make a tentative determination of ingestion by the subject (10), determine fundic impedance responsively to the fundic signal, and calculate a duration of a period during which the fundic impedance rose during the tentatively-determined ingestion. Upon finding that the duration is less than a fundic rise duration threshold value, the control unit (90) determines that the tentative determination of ingestion is a false positive. Other embodiments are also described.
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Citations
31 Claims
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1. Apparatus comprising:
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one or more antral sensors, configured to be applied to an antrum of a subject, and to generate an antral signal; and a control unit, configured to; detect ingestion of food by the subject, determine antral impedance responsively to the antral signal, and interpret a change in antral impedance vs. a as line value of less than a threshold value as indicating that the ingested food is predominantly solid. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method comprising:
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detecting ingestion of food by a subject; determining antral impedance of antral impedance of the subject; and interpreting a change in anti-al impedance vs. a baseline value of less than a threshold value as indicating that the ingested hand is predominantly solid.
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8. Apparatus comprising:
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one or more fundic sensors, configured to be applied to a fundus of a subject, and to generate a fundic signal; and a control unit, configured to; detect ingestion of food by the subject, determine fundic impedance responsively to the fundic signal, calculate a duration of it period during which the fundic impedance rose during the ingestion, and determine that the ingested food is predominantly solid upon finding that the duration of the period is greater than a threshold value. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A method comprising;
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detecting ingestion of food by a subject; determining fundic impedance of a fundus of the subject; calculating a duration of a period during which the fundic impedance rose during the ingestion; and determining that the ingested food is predominantly solid upon finding that the duration of the period is greater than a threshold value.
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17. Apparatus comprising:
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one or more antral sensors, configured to be applied m an antrum of a subject, and to generate an antral signal; and a control unit, configured to detect ingestion of food by the subject, calculate an antral local sense rate responsively to the antral signal, and determine that the ingested food is predominantly liquid upon finding that a reduction in the rate over a period of time is greater than a first threshold value, the period of time commencing during the ingestion of the food and having a period duration of less than a second threshold value. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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25. A method comprising;
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detecting ingestion of food by a subject; calculating an antral local sense rate of an antrum of the subject, and determining that the ingested food is predominantly liquid upon finding that a reduction in the rate over a period of time is greater than a first threshold value, the period of time commencing during the ingestion of the food and having a period duration of less than a second threshold value.
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26. Apparatus comprising:
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one or more fundic sensors, configured to be applied to a fundus of a subject, and to generate a fundic signal; and a control unit, configured to; make a determination of ingestion of food by the subject, determine fundic impedance responsively to the fundic signal, calculate a maximum rise rate, expressible as a measure of resistance over a measure of time, in the fundic impedance during a least one period of the ingestion, and determine that ingested food is liquid upon finding that the rise is at least equal to a fundic rise threshold value. - View Dependent Claims (27, 28, 29, 30)
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31. A method comprising:
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making a determination of ingestion of food by a subject; determining fundic impedance of a fundus of the subject; calculating a maximum rise rate, expressible as a measure of resistance over a measure of time, in the fundic impedance during at least one period of the ingestion; and determining that the ingested food is liquid upon finding that the rise is at least equal to a fundic rise threshold value.
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Specification