An adhesive device may include a first adhesive surface configured to be adhered to skin of a user, and a second adhesive surface opposite the first adhesive surface and configured to be adhered to a medical device. The adhesive device may also include an intermediate region between the first adhesive surface and the second adhesive surface, where the intermediate region includes a detector compound embedded in the intermediate region configured to change based on interaction of the detector compound with a target molecule.

An adhesive device may include a first adhesive surface configured to be adhered to skin of a user, and a second adhesive surface opposite the first adhesive surface and configured to be adhered to a medical device. The adhesive device may also include an intermediate region between the first adhesive surface and the second adhesive surface, where the intermediate region includes a detector compound embedded in the intermediate region configured to change based on interaction of the detector compound with a target molecule.

A non-invasive analyte sensor that includes one or more noise reduction components provided on the receive and/or transmit components to reduce extraneous radio frequency noise. A noise reduction component can be provided on the exterior of an electrical conductor that connects the receive antenna with the receive circuitry to suppress extraneous radio frequency noise that is generated on the exterior of the electrical conductor. The noise reduction component can be any type of noise reduction device that achieves such radio frequency noise suppression. In one embodiment, the noise reduction component can be a choke.

A non-invasive analyte sensor that includes one or more noise reduction components provided on the receive and/or transmit components to reduce extraneous radio frequency noise. A noise reduction component can be provided on the exterior of an electrical conductor that connects the receive antenna with the receive circuitry to suppress extraneous radio frequency noise that is generated on the exterior of the electrical conductor. The noise reduction component can be any type of noise reduction device that achieves such radio frequency noise suppression. In one embodiment, the noise reduction component can be a choke.

Sensors having an advantageous design and methods for fabricating such sensors are generally provided. Some sensors described herein comprise pairs of electrodes having radial symmetry, pairs of nested electrodes, and/or nanowires. Some embodiments relate to fabricating electrodes by methods in which nanowires are deposited from a fluid contacted with a substrate in a manner such that it evaporates and is replenished.

Sensors having an advantageous design and methods for fabricating such sensors are generally provided. Some sensors described herein comprise pairs of electrodes having radial symmetry, pairs of nested electrodes, and/or nanowires. Some embodiments relate to fabricating electrodes by methods in which nanowires are deposited from a fluid contacted with a substrate in a manner such that it evaporates and is replenished.

This document describes a conformable substrate that includes a hydrogel having adhesion-promoting moieties, said adhesion-promoting moieties comprising one or more catechol groups. The conformable substrate includes an array of microelectrodes bonded to the hydrogel by the adhesion-promoting moieties via the one or more catechol groups. This document also describes a method for transfer printing of an electronic structure to a hydrogel. The method includes the steps of coating a donor substrate with a film of polyacrylic acid, crosslinking the film of polyacrylic acid in a solution comprising divalent ions, patterning a microelectrode array onto the crosslinked film of polyacrylic acid, laminating an adhesive hydrogel substrate onto the donor substrate coated by the crosslinked film of polyacrylic acid comprising the patterned microelectrode array, and separating the crosslinked film of polyacrylic acid from the donor substrate in a monovalent solution.

In general, regardless of using an optical method or an electrical AC resistance impedance method, non-invasive blood glucose measurement has a problem in that variations in the level of glucose contained in blood are too small to be measured as a signal, and thus measurement results are inaccurate due to noises generated during measurement and errors caused by the difficulty in consistent measurement. To solve this problem, the present invention provides a non-invasive blood glucose sensor includes: a measurement-unit body; an impedance electrode sensor provided on an inner bottom surface of the measurement-unit body; a signal-generation and measurement unit configured to measure impedance while scanning frequency by supplying multiple frequencies to the impedance electrode sensor; a blood sensor configured to measure the amount of blood flowing through a body part brought into contact with the impedance electrode sensor; and a status display LED configured to display different colors according to the amount of blood measured using the blood sensor. Owing to this configuration, the present invention has an effect of measuring an accurate blood glucose level in a non-invasive manner.

In general, regardless of using an optical method or an electrical AC resistance impedance method, non-invasive blood glucose measurement has a problem in that variations in the level of glucose contained in blood are too small to be measured as a signal, and thus measurement results are inaccurate due to noises generated during measurement and errors caused by the difficulty in consistent measurement. To solve this problem, the present invention provides a non-invasive blood glucose sensor includes: a measurement-unit body; an impedance electrode sensor provided on an inner bottom surface of the measurement-unit body; a signal-generation and measurement unit configured to measure impedance while scanning frequency by supplying multiple frequencies to the impedance electrode sensor; a blood sensor configured to measure the amount of blood flowing through a body part brought into contact with the impedance electrode sensor; and a status display LED configured to display different colors according to the amount of blood measured using the blood sensor. Owing to this configuration, the present invention has an effect of measuring an accurate blood glucose level in a non-invasive manner.

The described systems and methods determine a driver's fitness to safely operate a moving vehicle based at least in part upon observed UVB exposure patterns, where the driver's UVB exposure levels may serve as a proxy for vitamin D levels in that driver's body. A smart ring, wearable on a user's finger, continuously monitors user's exposure to UVB light. This UVB exposure data, representing UVB exposure patterns, can be utilized, in combination with driving data, to train a machine learning model, which will predict the user's level of risk exposure based at least in part upon observed UVB exposure patterns. The user can be warned of this risk to prevent them from driving or to encourage them to get more sunlight exposure before driving. In some instances, the disclosed smart ring system may interact with the user's vehicle to prevent it from starting while exposed to high risk due to deteriorated psychological or physiological conditions stemming from insufficient UVB exposure.