Abstract: Systems and methods for a shape-memory in-ear biosensor for polysomnography and monitoring physiological signals are provided. Various embodiments include an earpiece made from a shape memory or temperature-dependent phase transition material embedded into polydimethylsiloxane elastomer body. The earpiece can use electrodes to detect physiological signals by making direct contact with a user's skin and without the use of electrically conductive gel. When heated above the glass transition temperature of the shape memory polymer, various embodiments of the biosensor may be folded. When cooled, the biosensor will maintain the folded shape. The folded biosensor may then be inserted into the ear canal of a user where, in response to heating by the user's body, it partially unfolds to conform to the shape of the ear canal.

Abstract: An active-pulse blood analysis system has an optical sensor that illuminates a tissue site with multiple wavelengths of optical radiation and outputs sensor signals responsive to the optical radiation after attenuation by pulsatile blood flow within the tissue site. A monitor communicates with the sensor signals and is responsive to arterial pulses within a first bandwidth and active pulses within a second bandwidth so as to generate arterial pulse ratios and active pulse ratios according to the wavelengths. An arterial calibration curve relates the arterial pulse ratios to a first arterial oxygen saturation value and an active pulse calibration curve relates the active pulse ratios to a second arterial oxygen saturation value. Decision logic outputs one of the first and second arterial oxygen saturation values based upon perfusion and signal quality.

Abstract: In some examples, a system is configured to determine, using a neural network algorithm of a cerebral autoregulation model, a cerebral autoregulation status of the patient based at least in part on a blood pressure of the patient over a period of time and regional cerebral oxygen saturation of the patient over the period of time.

Abstract: A method of sleep stage detection using vital sign features derived from PPG signals. The method includes performing a logistic regression operation based on a machine learning classifier model to calculate an indication value for an intermediate epoch. The indication value is calculated based on the vital sign features for the intermediate epoch as well as those of the preceding and succeeding epochs. The method then detects the sleep stage of the corresponding intermediate epoch based on the indication value for the corresponding intermediate epoch.

Abstract: Systems, methods, and apparatuses for enabling a plurality of non-invasive, physiological sensors to obtain physiological measurements from essentially the same, overlapping, or proximate regions of tissue of a patient are disclosed. Each of a plurality of sensors can be integrated with or attached to a multi-sensor apparatus and can be oriented such that each sensor is directed towards, or can obtain a measurement from, the same or a similar location.

Abstract: An electronic device includes a housing, a touchscreen display viewable through a first part of the housing, a photoplethysmogram (PPG) sensor exposed through a second part of the housing, a processor disposed in the housing and operatively connected to the touchscreen display and the PPG sensor, and a memory disposed in the housing and operatively connected to the processor, wherein the memory stores instructions that, when executed, are configured to cause the processor to receive first data from the PPG sensor, generate second data by band-pass filtering the first data, generate oxygen saturation data based on at least some of the second data, select a first portion related to a first period of time from the second data, and display, on the touchscreen display, a graphical user interface including information related to the oxygen saturation data except for data corresponding to the first portion from the graphical user interface.

Abstract: The present application relates to a device, system, and method for determining patient body temperature based on a multi-modal wearable biosensor applied to the surface of the body that measures multiple physiological, physical, and skin-surface/microclimatic thermal parameters, derives additional instantaneous parameters, learns contextual parameters based on temporal dynamics, and employs ensemble model fusion method to estimate core body temperature.

Abstract: A medical system comprising a first medical device, a second medical device, and a computer. The first medical device is configured to be placed beneath the dermis. The first medical device comprises an enclosure comprising non-electrically conductive material. A cap couples to the enclosure and is configured to seal the enclosure. The enclosure houses electronic circuitry configured to measure one or more parameter or provide a therapy. The cap couples to the ground of the electronic circuitry. The first medical device includes a dual band antenna. A first antenna is configured to operate within a first frequency band below 1 gigahertz. The second antenna is configured to operate at a frequency above 1 gigahertz. The second medical device is configured to transmit a radio frequency signal to the first medical device. The first medical device is configured to harvest the energy received from the radio frequency signal to enable the electronic circuitry and perform at least one task.

Abstract: A medical apparatus according to an embodiment includes a processing circuitry. The processing circuitry is configured: to receive an input of test result information including a test result of each of tests that are related to a biological valve and were carried out at two or more different times; to estimate one of a test time for a follow-up observation of the biological valve and a test time for replacing the biological valve, on the basis of a chronological change in an open/close state of the biological valve derived from the received test result information; and to output the estimated test time.

Abstract: A specimen collector for gathering tissue specimens includes a housing extending along a first axis between a first opening and a second opening to define a hollow interior. An inlet port and an outlet port are located axially between the first and second openings. A specimen tray defines a first specimen well and a second specimen well and is slideably disposed within the housing and axially slideable between a first position to dispose the first specimen well in fluid communication with the inlet and outlet ports and a second position to dispose the second specimen well in fluid communication with the inlet and outlet ports. The specimen tray comprises a pair of tray components each defining a respective one of the first and second wells and jointly slideable. The pair of tray components are separable from one another and each individually removable from the housing.

Abstract: Described herein are eye implants that can include a pressure-responsive material that can be capable of changing color in response to pressure exerted on it. Also described here are methods of implanting and using the eye implants described herein to monitor intraocular pressure in a subject. The pressure-responsive material can be used to diagnose and monitor human or animal subjects.

Abstract: A wound multiple sensing method, including: calculating the similarity between the current data sequence and each of the case-data sequences in each of the reference cases; selecting the case-data sequence which has the greatest similarity with the current data sequence, from the case-data sequences in each of the reference cases, to be a similar case-data sequence in each of the reference cases, wherein each similar case-data sequence corresponds to a similar case treatment; performing a multiple regression analysis using the similar case-data sequences and the similar case treatments to calculate a fitness function, wherein the dependent variable of the fitness function is a wound change; performing a parameter optimization algorithm using the current data sequence and the fitness function to calculate an optimal treatment which maximizes the wound change, and to calculate an expected wound change value that corresponds to the optimal treatment.

Abstract: A state of a user of a mobile terminal having a display for displaying an image may be estimated. A sightline detector detects a sightline of the user of a mobile terminal and processing circuitry is configured to estimate a state of the user. The processing circuitry is configured to determine a top-down index value that is correlated with an attention source amount allocated to top-down attention of the user with respect to an image displayed on a display of the mobile terminal. The processing circuitry is configured to determine a bottom-up index value correlated with the attention source amount allocated to bottom-up attention of the user with respect to the image displayed on the display. The processing circuitry is configured to estimate the user state including an attention function degraded state based on the top-down index value and the bottom-up index value.

Abstract: Proposed are concepts for predicting the likelihood of a brain injury of a subject resulting from a fall event experienced by the subject. Such concepts may therefore be useful for determining a need for further medical assessment or treatment of a fall by the subject. According to an exemplary concept, data from one or more sensors is used to determine information about a fall of a subject. Such information is then used in conjunction with a prediction algorithm to derive a probability of a brain injury.

Abstract: The terminal includes a touch panel including first electrodes arranged in a first direction and second electrodes arranged in the second direction intersecting the first direction, a display panel attached to the touch panel and to display an image, and a processor to control the touch panel and the display panel. In a measuring mode, the processor is configured to: apply a driving signal to the touch panel, the touch panel being configured to form an electric field and/or magnetic field when the driving signal is applied, and determine body composition of a user based on a sensing signal output from the touch panel in accordance with eddy current, the eddy current being induced to a body of the user by the electric field and/or magnetic field formed around the touch panel.

Abstract: An oximeter device determines an oxygen saturation for the tissue and determines a quality value for the oxygen saturation and associated measurements of the tissue. The quality value is calculated from reflectance data received at the detectors of the oximeter device. An accelerometer of the oximeter device can detect movement of the oximeter device when oximetry measurements are made by the oximeter device. An amount of the movement is an indicator of a probe face of the oximeter device changing position with respect to the tissue when the measurements are made. The accelerometer information is used by the oximeter device to adjust the quality value to reflect the amount movement. The oxygen saturation and the adjusted quality metric value are displayed on a display of the oximeter device so that a user may view the quality of the displayed information.

Abstract: A system and method are provided for performing physical activity monitoring and fall detection of a subject using a wearable sensor including at least one audio sensor and at least one of an accelerometer, a gyroscope and a magnetometer. The method includes monitoring activities of the subject using the at least one of the accelerometer, the gyroscope and the magnetometer, and identifying a characteristic motion pattern based on the monitored activities; detecting an apparent fall experienced by the subject based on the identified at least one characteristic motion pattern; monitoring sounds provided by the at least one audio sensor following the detected apparent fall; determining whether the detected apparent fall is an actual fall experienced by the subject based on the monitored sounds; and communicating an indication of the actual fall to a monitoring system, enabling commencement of responsive action.

Abstract: Systems and methods are disclosed for providing ongoing monitoring and updating of blood volume status, where the system or method can include guidance in the form of recommendations for treatment actions or alerts about altered patient status.

Abstract: Devices, systems, and methods are provided for disambiguating phase in radar-based waveforms. A method may include determining a first waveform, the first waveform associated with a first subcarrier and a second subcarrier in a frequency domain, and the first waveform based on radar measurements. The method may include determining a motion signal, and determining, based on the first subcarrier, the second subcarrier, a subcarrier spacing of the subcarriers, and the motion signal, a phase change differential value between the first subcarrier and the second subcarrier. The method may include generating, based on the phase change differential value, a second waveform, and generating a third waveform in the time domain by applying the second waveform to the first waveform.

Abstract: This disclosure is directed to techniques for recording and recognizing physiological parameter patterns associated with symptoms. A medical device system includes a medical device including an accelerometer configured to collect an accelerometer signal that indicates one or more patient movements that occur during a cough. Additionally, the medical device system includes processing circuitry configured to: determine whether the accelerometer signal satisfies a set of criteria corresponding to a cough pattern comprising a smooth increase from a baseline, then a sharp decrease, a peak within the sharp decrease, then a gradual return to the baseline; and identify a cough based on the determination that the accelerometer signal satisfies the set of criteria.