Techniques for measuring ion related metrics at a user's skin surface are disclosed. In one aspect, a method for operating a wearable device may involve determining, based on output of one or more ion selective field effect transistor sensors, various physiological conditions such as a state of hydration, a state of skin health, or the cleanliness of the wearable device or an associated garment.

Provided is a method of controlling and adjusting at least one body feature of a subject using electronic mobile devices worked by a person in need thereof and measuring devices interconnected thereto.

Embodiments relate to a non-enzymatic glucose sensor. The non-enzymatic glucose sensor comprises one or more electrodes, a microfluidic channel, and at least one inlet, wherein the at least one inlet is configured to deliver a fluid to a microfluidic channel and wherein the microfluidic channel is configured to transport the fluid to the one or more electrodes. At least one of the one or more electrodes is a laser-induced graphene electrode, wherein the laser-induced graphene electrode comprises one or more uniform coatings of metal.

The present disclosure provides a stretchable and flexible sweat-activated graphene-coated Ni foam-based MgO.sub.2 battery capable of powering an intelligent and flexible electronics for health monitoring purposes with different biosensors.

Method and apparatus for receiving a first signal from a first working electrode of a glucose sensor positioned at a first predetermined position under the skin layer, receiving a second signal from a second working electrode of the glucose sensor positioned at a second predetermined position under the skin layer, the second signal received substantially contemporaneous to receiving the first signal, detecting a dropout in the signal level associated with one of the first or second signals, comparing the first signal and the second signal to determine a variation between the first and second signals, and confirming one of the first or second signals as a valid glucose sensor signal output when the determined variation between the first and the second signals is less than a predetermined threshold level are provided.

A smart wearable device system includes at least two wearable devices having a health parameter test module, an anti-lost terminal module and a communication interface; and a smart control device having a health parameter control module, an anti-lost control module, a display screen and a communication interface. Each wearable device is wirelessly connected to the smart control device, and every two wearable devices are wirelessly connected to each other. The health parameter test module transmits physical health parameter information to the smart control device, the health parameter control module performs computational processing, stores and sends image information that reflects body health conditions, and the display screen displays the image information. The anti-lost terminal module has a location and time feedback module, and the anti-lost control module has parameter setting module and a location and time receiving module. The system can monitor physical health and prevent persons from getting lost outside.

A wearable sensor for monitoring an external bodily fluid includes a sensor thread, a wick, a substrate, and a communication interface all of which are disposed on a substrate. The wick wicks the external bodily fluid to a functionalized region of the thread. The communication interface transmits, to an external device, data indicative of what the sensor thread has measured in said external bodily fluid. The external device can then carry out real-time analysis or storage.

Systems and methods are disclosed that provide smart alerts to users, e.g., alerts to users about diabetic states that are only provided when it makes sense to do so, e.g., when the system can predict or estimate that the user is not already cognitively aware of their current condition, e.g., particularly where the current condition is a diabetic state warranting attention. In this way, the alert or alarm is personalized and made particularly effective for that user. Such systems and methods still alert the user when action is necessary, e.g., a bolus or temporary basal rate change, or provide a response to a missed bolus or a need for correction, but do not alert when action is unnecessary, e.g., if the user is already estimated or predicted to be cognitively aware of the diabetic state warranting attention, or if corrective action was already taken.

A sweat sensing system comprises a mesh for location over a sweat surface on which sweat is formed or collected, and a vibration system for vibrating the mesh to nebulize sweat droplets. The nebulized sweat droplets are condensed on a sensing surface, and a sweat sensor performs biomarker sensing of the sweat at the sensing surface.

Systems and methods of use for continuous analyte measurement of a host's vascular system are provided. In some embodiments, a continuous glucose measurement system includes a vascular access device, a sensor and sensor electronics, the system being configured for insertion into communication with a host's circulatory system.