Devices for integrated, repeated, prolonged, and/or reliable sweat stimulation and biosensing
First Claim
1. An apparatus to measure or collect sweat over an extended period of time, comprising:
- a plurality of sweat stimulation pads, wherein each sweat stimulation pad includes;
a sweat stimulant, an electrode, and a sweat stimulant carrying medium, and wherein the pad is adapted to deliver the sweat stimulant to skin to generate sweat;
one or more sweat collectors;
one or more sensors for measuring a characteristic of an analyte in sweat, wherein the sensor is in fluidic communication with the sweat collector; and
a timing circuit adapted to selectively activate and deactivate said plurality of sweat stimulation pad for one or more limited periods of time, wherein each sweat stimulation pad is selectively operable by said timing circuit.
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Accused Products
Abstract
A sweat sensing device includes a plurality of sweat collection pads communicating with a sensor. Each of the pads is activated by a timing circuit which allows one or more of the pads to be activated at a selected time and subsequent deactivated after a defined period of time. This allows for selective collection of sweat from a plurality of pads over a prolonged period of time. An impedance measuring circuit can be employed to determine if one or more of the pads becomes disconnected, in order to avoid irritation. Further, the devices can use a common microfluidic device which both transports sweat activating substance, such as pilocarpine, to the surface of the skin and directs sweat away from the skin to a sensing device.
108 Citations
13 Claims
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1. An apparatus to measure or collect sweat over an extended period of time, comprising:
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a plurality of sweat stimulation pads, wherein each sweat stimulation pad includes;
a sweat stimulant, an electrode, and a sweat stimulant carrying medium, and wherein the pad is adapted to deliver the sweat stimulant to skin to generate sweat;one or more sweat collectors; one or more sensors for measuring a characteristic of an analyte in sweat, wherein the sensor is in fluidic communication with the sweat collector; and a timing circuit adapted to selectively activate and deactivate said plurality of sweat stimulation pad for one or more limited periods of time, wherein each sweat stimulation pad is selectively operable by said timing circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification