A foot-based wearable system disposed proximate to the dorsalis pedis artery can detect cardiac and muscular activities. Utilizing flexible iontronic sensing (FITS) technology, a sensing array detects both cardiovascular functions, such as heart rate, ECG, and respiration and motion artifact signals with a spatial reference to muscular activities based on the orientation of the array. Individual tendon responses are analyzed and correlated to different pedal gestures, from which multi-channel signals can be used to distinguish different activities. Wearable articles of the invention include a platform to simultaneously analyze both vital signals and body activities from the cardiac waveforms and muscular responses in a natural and unnoticeable fashion. The data-collecting wearable system provides a means to assess personalized health and daily activities on a continuous basis.

An electronic device receives a first input, where an air pump inflates and pressurizes an airbag. The electronic device obtains a pressure value of the airbag in a process of controlling the air pump to inflate and pressurize the airbag. The electronic device obtains a first pressure signal, where the first pressure signal is a signal indicating that the pressure value of the airbag changes with time in a process in which the air pump starts to inflate and pressurize the airbag until the pressure value of the airbag is equal to a preset pressure value. The electronic device determines, based on the first pressure signal, tightness of wearing a wristband by a user. The electronic device corrects, based on the tightness, a blood pressure measurement value determined based on a second pressure signal, to determine a blood pressure value of the user.

A portable device is configured to connect directly to an intraosseous (IO) catheter and provide a clinician with actionable information to determine whether the catheter is placed correctly, such as whether the catheter is placed in the medullary cavity of bone. The device provides this information leveraging the presence or absence of arterial pressure waveforms. A method for assessing placement of an intraosseous catheter includes coupling a pressure transducer to an IO catheter placed in tissue, obtaining a continuous pressure waveform from a pressure signal provided by the pressure transducer, and assessing placement of the catheter based on the continuous pressure waveform.

In a method and magnetic resonance (MR) apparatus for pulse wave velocity (PWV) measurement along the aorta of a subject using MR imaging, a multislice cardio synchronized segmented ciné MR data acquisition sequence is optimized in order to enhance inflow representation in the slice images, in order to make the multislice MR data acquisition sequence viable for clinical uses, so as to acquire intensity-based MR data from two transverse slices spaced from each other along the descending aorta. The respective intensities of relevant pixels in at least two respective slice images are analyzed in order to identify the arrival of a pulse wave in the respective slices by the onset of flow enhancement in the slices, represented by intensity changes in the pixels. From the onset of flow enhancement in the respective slice images, PWV is calculated. An electronic signal representing the calculated PWV is then provided from a computer.

An information processing apparatus includes a memory and at least one processor. In the memory, a program is stored. The processor is configured to execute the program stored in the memory, and generate prescription data for skincare of a skin based on history data of an index value representing change in blood flow before and after treatment. The index value is calculated based on a first skin image and a second skin image. The first skin image is obtained by imaging the skin before a blood flow enhancement treatment, and the second skin image is obtained by imaging the skin after the blood flow enhancement treatment.

A signal representing heartbeat behavior is accurately restored. The present signal restoration system includes: a signal acquirer configured to acquire a first heartbeat signal representing heartbeat behavior; a first band-pass filter configured to generate a first signal by performing first band-pass filter processing on the first heartbeat signal; an integral calculator configured to calculate an integral value by integrating frequency intensity of the heartbeat represented by the first signal; a second band-pass filter configured to generate a third signal by performing second band-pass filter processing on a second signal representing the integral value with respect to time; and a restored signal generator configured to generate a restored signal representing heartbeat behavior based on first data generated by dividing the third signal at intervals of a predetermined time.

An apparatus for estimating bio-information is provided. The apparatus for estimating bio-information according to an embodiment includes: an ultrasonic sensor configured to acquire a bio-signal from an object; and a processor configured to detect peaks from the bio-signal, and to determine false detection of a peak, among the detected peaks, by using at least one of a time interval between a current peak and an immediately preceding peak, amplitudes of the current peak and the immediately preceding peak, a shape of a waveform on a left region and a right region of the peak, and an occurrence position of the peak.

An apparatus for estimating blood pressure is provided. The apparatus may include a pulse wave sensor configured to measure from an object, a plurality of pulse wave signals having different wavelengths, a force sensor configured to measure a contact force applied by the object to the pulse wave sensor, and a processor configured to extract, from the plurality of pulse wave signals, at least one similarity feature indicating a similarity between the plurality of pulse wave signals, and estimate the blood pressure based on the similarity and the contact force that is measured at a point in time at which the at least one similarity feature is extracted.

An apparatus for estimating bio-information according to an embodiment includes: a sensor that measures a pulse wave signal from an object and contact pressure of the object; and a processor that obtains an oscillometric envelope based on an amplitude of the pulse wave signal and the contact pressure, and estimates bio-information based on a center of mass of a phase of contact pressure of the obtained oscillometric envelope.

A method of evaluating quality of a bio-signal includes receiving an input bio-signal; setting a quality evaluation region in thebio-signal; dividing a signal of the quality evaluation region into a plurality of sub-signals; extracting a representative waveform by using the plurality of sub-signals; evaluating a quality of each sub-signal based on the representative waveform; and evaluating a quality of the signal in the quality evaluation region based on quality evaluation results of the plurality of sub-signals.