Medical device systems and methods for operating medical device systems conserve energy by efficiently managing computational demands of the systems. A first analysis, having relatively lower computational processing demand than at least a second analysis, processes signals from a subject to determine a first estimate of a propensity for the subject to have a neurological event. If the first estimate meets a set of specified criteria, a second analysis is performed to determine a second estimate of the propensity for the subject to have a neurological event.

A method for operating a medical device includes activating a processor in the medical device in a low-power operating mode, measuring a first voltage level of the battery, applying at least one discharge pulse to the battery in response to the first voltage level of the battery being greater than a predetermined passivation minimum voltage threshold and less than a predetermined passivation maximum voltage threshold, measuring a second voltage level of the battery after the at least one discharge pulse, and operating the processor in the medical device in an increased-power operating mode to continue operation of the medical device only in response to the second voltage level being greater than or equal to a predetermined operating voltage threshold, the predetermined operating voltage threshold being greater than the predetermined passivation minimum voltage threshold and less than or equal to the predetermined passivation maximum voltage threshold.

An example monitoring device for detecting and measuring a vital sign of a subject includes: a base; a battery mounted to the base; first and second transceivers attached to the base at opposing angles, and powered by the battery to transmit pulses and receive reflected pulses; an antenna powered by the battery, and configured to wirelessly transmit data acquired from the first and second transceivers; and a computing device powered by the battery, and operatively coupled to the first and second transceivers and the antenna, the computing device having a processing device and a memory storing instructions that, when executed by the processing device, cause the monitoring device to determine a respiration rate by detecting a cyclical change in distance based on the reflected pulses.

A system for detecting salt ion concentration, comprising a device further comprising a sensor having a carbon printed electrode on a flexible substrate with adhesive on one side (backside) and the circuit electronics to generate pulse signal stimuli and measure salt concentrations to determine hydration level of a person or a living being, wherein the device is a wearable device. The electrode can be made into different shapes changing the area as necessary, since it is a carbon printed electrode and is flexible.

Provided are a control and apparatus for a wearable device, an electronic device, and a computer-readable storage medium. The wearable device has a first operation mode and a second operation mode. The first operation mode is a mode for running a first system and a second system. The second operation mode is a mode for running only the second system. The first operation mode has a higher power consumption than the second operation mode. The control method includes: obtaining user behavior data (102), determining a user behavior status based on the user behavior data (104), and switching, in response to detecting that the user behavior status is a sleep status, the wearable device from the first operation mode to the second operation mode (106).

A device can be used for a long period of time without increasing the size and weight, and a biological signal is surely measured. An aspect of the present invention includes acquiring, from a first sensor, a first biological signal related to a heartbeat of a subject, acquiring, from a second sensor, a second biological signal related to the heartbeat of the subject, detecting a first feature from the first biological signal acquired, setting a light emission control pattern based on a detection timing of the first feature and information indicating time correlation between the first biological signal and the second biological signal, and driving a light emitting element of the second sensor to perform intermittent light emission based on the light emission control pattern set.

While power consumption is suppressed, biological information is measured without fail when a condition of a subject changes. An aspect of the present invention is configured to acquire a biological signal related to a beat of a heart of the subject from a biometric sensor, detect a feature of the biological signal from the biological signal acquired, determine an abnormal change in the feature based on the feature detected and first threshold information set in advance, set an operation mode of the biometric sensor to a continuous operation mode when the abnormal change in the feature is determined, and set the operation mode of the biometric sensor to an intermittent operation mode in a period without the abnormal change.

A brain measurement apparatus includes: a static magnetic field forming unit for forming a static magnetic field in a measurement area; a gradient magnetic field coil for forming a gradient magnetic field in the measurement area; a transmission coil for transmitting a transmission pulse toward a subject in the measurement area; a detection coil for detecting a nuclear magnetic resonance signal generated in the subject by transmission of the transmission pulse; and a generator for generating an MR image based on the nuclear magnetic resonance signal detected by the detection coil.

A method of determining one or more vital sign parameters by a wireless vital-sign measurement device comprises: measuring motion information of a user wearing the wireless measurement device, the measurement device being in the idle mode in which at least one opto-electronic sensor in the measurement device is deactivated; switching the measurement device in an active mode if the motion information is below a predetermined threshold, wherein in the active mode the at least one opto-electronic sensor is activated; during a predetermined measuring period, exposing part of a skin tissue of the user to light and measuring one or more optical response signals associated with the exposed skin tissue and the motion sensor measuring motion information associated with movements of the user; and, selecting or rejecting one or more pulses in the one or more optical response signals on the basis of the motion information measured during the measuring period and determining one or more vital sign parameters on the basis of the one or more selected pulses.

Devices, systems and methods are provided to implement key generation for secure pairing between first and second devices using embedded out-of-band (OOB) key generation and without requiring the devices to have input/output (IO) capability to enter authentication information. Bluetooth Smart or Low Energy (BLE) OOB pairing option can be used for pairing medical devices with added security of OOB key generation. The OOB key generation comprises providing first and second devices with the same predefined credential and secure hashing algorithm, and making input of the hashing algorithm of the first and second devices the same. The first device transmits unique data to second device (e.g., via BLE advertising) to share and compute a similar input. The first and second devices use the credential and shared data with the hashing function to generate a key that is the same at each of first and second devices.