A wearable respiration monitoring system having a transmitter coil that is adapted to generate and transmit multi-frequency AC magnetic fields, a plurality of receiving coils adapted to detect variable strengths in the AC magnetic fields and generate AC magnetic field strength signals representing anatomical displacements of a monitored subject, and at least one accelerometer that is configured to detect and monitor anatomical positions and movement of the subject, and generate and transmit accelerometer signals representing same. The wearable monitoring system further includes an electronics module that is adapted to receive the AC magnetic field strength signals and accelerometer signals, and determine at least one respiratory disorder as a function of the AC magnetic field strength signals and at least one anatomical position of the subject as a function of the accelerometer signals.

Methods for providing swimmers with performance metrics, turn detection, and stroke rate detection are disclosed. An example method comprises mounting a wearable device comprising an accelerometer, gyroscope and processor on a swimmer's head, continuously measuring acceleration using said accelerometer and angular velocity using said gyroscope to provide acceleration and angular velocity signals to said processor, processing said acceleration and angular velocity signals to determine first roll and pitch angles, applying a correction to axes of said gyroscope based on said roll and pitch angles to determine corrected angular velocity signals, initializing a heading angle at a pre-defined, non-zero value, integrating said corrected angular velocity signals over a time window to determine changes to the heading angle, determining maximum and minimum heading angles within the time window, and, recording a turn when a difference between the maximum and minimum heading angles within the time window is at least approximately 180 degrees.

Sleep systems having embedded sensors are described. In one aspect, a sleep system includes a mattress and one or more force sensors embedded within the mattress. The force sensors are positioned within the mattress to sense movement of an occupant of the mattress. The sleep system also includes one or more processors coupled with the one or more force sensors. At least one of the processors is configured to determine sleep state information for the occupant based on data obtained from one or more of the force sensors.

Sleep systems having embedded sensors are described. In one aspect, a sleep system includes a mattress and one or more force sensors embedded within the mattress. The force sensors are positioned within the mattress to sense movement of an occupant of the mattress. The sleep system also includes one or more processors coupled with the one or more force sensors. At least one of the processors is configured to determine sleep state information for the occupant based on data obtained from one or more of the force sensors.

Described herein are example methods, devices and systems for motion compensation in ultrasonic respiration monitoring. A respiration detection system includes a first probe placed on a front side of a patient's body and a second probe placed on a dorsal side of the body. The first probe includes an ultrasound transducer, a first accelerometer unit and a magnetic field sensor unit, and the second probe includes a second accelerometer unit and magnetic field sensor unit. Due to respiration of the patient, the abdominal region of the body moves, creating measurement errors when an ultrasound beam is directed towards an internal structure (internal tissue region) inside the patient's body. Correction for such measurement errors uses input data from the first and second accelerometer units and the magnetic field sensor unit.

A method for measuring life parameters during sleep by a device including an accelerometer attached to the body of a sleeping subject. The method includes: (a) setting a hysteresis width having a maximum hysteresis value and a minimum hysteresis value; (b) reading, from the accelerometer, values of acceleration in three axes; (c) filtering the values of acceleration in each of the three axes with a band-pass filter to obtain filtered acceleration signals; (d) combining the filtered acceleration signals to obtain a signal level; (e) checking whether the signal level is higher than the current maximum hysteresis value and if so, setting the maximum hysteresis value to the signal level and setting the minimum hysteresis value to the maximum hysteresis value decreased by the hysteresis width; and (f) signaling a breath detection when detecting a transition from a falling edge to a raising edge.

A method for measuring life parameters during sleep by a device including an accelerometer attached to the body of a sleeping subject. The method includes: (a) setting a hysteresis width having a maximum hysteresis value and a minimum hysteresis value; (b) reading, from the accelerometer, values of acceleration in three axes; (c) filtering the values of acceleration in each of the three axes with a band-pass filter to obtain filtered acceleration signals; (d) combining the filtered acceleration signals to obtain a signal level; (e) checking whether the signal level is higher than the current maximum hysteresis value and if so, setting the maximum hysteresis value to the signal level and setting the minimum hysteresis value to the maximum hysteresis value decreased by the hysteresis width; and (f) signaling a breath detection when detecting a transition from a falling edge to a raising edge.

Provided are systems and methods for medical diagnosis. The systems and methods may identify a coherence between paired sensor data respectively measured from a first sensor attached to a head of a subject and a second sensor attached to a body part of the subject. The systems and methods may determine an amount of volition in the subject's body based on the coherence. The systems and methods may determine a diagnosis or a treatment plan for a subject based on the amount of volition. The system and methods may be used to track interaction between individuals in a clinical setting or in a social group.

An improved device for monitoring respiration or other vital signs of a user using one or more sensors. The invention may be worn within the mouth of the user to allow more accurate, direct, and fast measurements. The invention may also include a distribution mechanism that may be used to administer a substance such as medication. The substance may be administered in response to data collected by one or more of the sensors in the device and/or in response to data received from another device.

The invention provides a system for measuring respiratory rate (RR) from a patient. The system includes an impedance pneumography (IP) sensor, connected to at least two electrodes, and a processing system that receives and processes signals from the electrodes to measure an IP signal. A motion sensor (e.g. an accelerometer) measures at least one motion signal (e.g. an ACC waveform) describing movement of a portion of the patient's body to which it is attached. The processing system receives the IP and motion signals, and processes them to determine, respectfully, frequency-domain IP and motion spectra. Both spectra are then collectively processed to remove motion components from the IP spectrum and determine RR. For example, during the processing, an algorithm determines motion frequency components from the frequency-domain motion spectrum, and then using a digital filter removes these, or parameters calculated therefrom, from the IP spectrum.