Abstract: An electronic device may include a housing and a PhotoPlethysmoGram (PPG) sensor disposed inside the housing. The PPG sensor may include a first Light Emitting Diode (LED) configured to generate light in a first wavelength band, a second LED configured to generate light in a second wavelength band, a third LED configured to generate light in a third wavelength band, a fourth LED configured to generate light in a fourth wavelength band, and a light receiving module including at least one photo diode. The electronic device may include a processor operatively coupled with the PPG sensor and a memory operatively coupled with the processor. The memory may include instructions that, when executed, cause the processor to measure optical densities of the light generated by the first LED to the fourth LED, and calculate a blood glucose value based at least in part on the measured optical densities.

Abstract: A method of operation of a compute system includes: generating a skin segmentation including a non-skin region and a skin prediction based on a patient image; generating a body part segmentation based on the patient image; generating a cropped image based on the skin segmentation and the body part segmentation with the cropped image includes the non-skin region based on the skin prediction; generating a psoriasis segmentation based on the cropped image and the skin prediction; generating intermediate scores for erythema, induration, desquamation for the cropped image; and generating a full body PASI score based a psoriasis segmentation and the intermediate scores on the for displaying on a device to assist in diagnosis.

Abstract: An apparatus for estimating bio-information may include a sensor configured to obtain a bio-signal from an object, and a processor configured to obtain a second-order differential signal of the bio-signal, and extract a progressive wave component from the bio-signal using, based on a first local minimum point of the second-order differential signal being stable, the first local minimum point of the second-order differential signal, or extract the progressive wave component from the bio-signal using, based on the first local minimum point of the second-order differential signal being unstable, a maximum amplitude point in a systolic portion of the bio-signal.

Abstract: Systems, devices, and methods are described herein for maintaining a physiological sensor at constant pressure against a subject. A system may include a wearable band that is wearable by a subject, a physiological sensor coupled to the wearable band, a pressure sensor coupled to the wearable band, a processor and a user interface. The physiological sensor may be positioned along an inside surface of the wearable band, embedded in the wearable band, or otherwise positioned in the band to be adjacent to the subject as the subject wears the wearable band. The pressure sensor may directly or indirectly measure a pressure of the physiological sensor against the subject. The processor may generate an alert when a pressure measurement for the physiological sensor against the subject is outside a specified range. The user interface may present the alert to the subject.

Abstract: The present invention relates to an improved tocodynamometer transducer that exhibits increased mechanical stability, dynamic range, accuracy, and reliability. Improvement components include top and bottom enclosures, plunger, ferrite core, LVDT transformer, transformer housing, flat spring, and other components. The flat spring includes four spring ribs that are symmetrical, curvilinear in shape, identical in path length, separated by an air gap, and equally spaced between the outer ring, inner ring, and the spring ribs that are adjacent. The spring constant is identical along two or more axes improving the accuracy of the improved tocodynamometer transducer. The ferrite core travel length is increased and mechanically constrained to remain between the LVDT transforming winding increasing the dynamic range and the linearity of the voltage output of the improved tocodynamometer transducer.

Abstract: Embodiments of the present technology may include a system for monitoring a physiological parameter in a person, the system including a frequency synthesizer configured to generate radio waves across a range of radio frequencies. Embodiments may also include at least one transmit antenna configured to transmit the radio waves below the skin surface of a person. Embodiments may also include a two-dimensional array of receive antennas configured to receive radio waves, the received radio waves including a reflected portion of the transmitted radio waves. Embodiments may also include processing circuits configured to generate data in response to the received radio waves and to coherently combine the generated data across the two-dimensional array of receive antennas and across the range of radio frequencies to produce a pulse wave signal of the person.

Abstract: A method, system, apparatus, and/or device to determine a condition of a user using a spectrometer with a collimator on a glass substrate. The method, system, apparatus, and/or device may include: a band comprising a shape, size, and flexibility designed for attaching the band to a body part of a user; a light source embedded in the band that emits light comprising a constituent wavelength that provides an indication of a feature of the body part; an optical sensor positioned in the band to receive the constituent wavelength; and a glass substrate oriented in the band to receive the light, the glass substrate comprising: an optical filter that comprises a passband to isolate the constituent wavelength from other wavelengths of the light; and a carbon nanotube grid structure comprising walls and through-channels, the carbon nanotube grid structure adhered to the glass substrate.

Abstract: A patient monitoring sensor having a communication interface, through which the patient monitoring sensor can communicate with a monitor is provided. The patient monitoring sensor includes a light-emitting diode (LED) communicatively coupled to the communication interface and a detector, communicatively coupled to the communication interface, capable of detecting light. The patient monitoring sensor includes a layer of material is provided over the LED on the patient-side of the sensor to reduce transmission of heat therefrom to the skin of the patient.

Abstract: A method for calculating physiological parameters includes: selecting a section of time domain signal corresponding to at least one signal of red light and infrared light obtained by sampling, and performing a conversion from time domain to frequency domain to obtain a corresponding frequency domain signal; selecting all rational frequency spectrum peak information, calculating energy information of selected reasonable frequency spectrum peaks, and forming a frequency spectrum peak energy ratio sequence; constructing a stability coefficient according to the frequency spectrum peak energy ratio sequence, and if the stability coefficient is low, constructing a compensation coefficient by using the frequency spectrum peak energy ratio sequence; and compensating for at least one of the time domain signal and the frequency domain signal by using the compensation coefficient, and calculating based on at least one of the compensated time domain signal and the frequency domain signal to obtain the physiological param

Abstract: An optical detection device for physiological characteristic identification includes a substrate, a light source and an optical receiver. The light source includes a plurality of first lighting units and a plurality of second lighting units symmetrically arranged on the substrate. The optical receiver is disposed on the substrate and adapted to analyze optical signals emitted by the light source for acquiring a result of the physiological characteristic identification.

Abstract: An apparatus is described which comprises the following: (a) a housing configured to be carried in an ear, (b) a motion sensor unit for acquiring motion data, (c) a physiological sensor unit for acquiring physiological data, (d) a data processing unit configured to generate performance data based on the motion data and/or the physiological data, (e) a signal processing unit configured to generate an audio signal based on the generated performance data, and (f) a loudspeaker for outputting the generated audio signal, wherein the motion sensor unit, the physiological sensor unit, the loudspeaker, the data processing unit, and the signal processing unit are incorporated in the housing. Furthermore, a system, a method and a use is described.

Abstract: Embodiments of the present technology may include a method for monitoring a physiological parameter in a person using a radar system, the method including generating a pulse wave signal from stepped frequency scanning data that corresponds to radio waves that have reflected from features below the skin of the person. In some embodiments, the stepped frequency scanning data is collected through stepped frequency scanning with a two-dimensional array of receive antennas over a range of stepped frequencies using frequency steps of a step size. Embodiments may also include changing a parameter of the stepped frequency scanning in response to the pulse wave signal. Embodiments may also include generating the pulse wave signal from stepped frequency scanning data using the changed parameter.

Abstract: The present disclosure provides methods and apparatus for evaluating the flow of blood in damaged or healing tissue. The present disclosure also provides methods of identifying a patient at the onset of risk of pressure ulcer or at risk of the onset of pressure ulcer, and treating the patient with anatomy-specific clinical intervention selected based on perfusion or blood oxygenation values, or a combination thereof. The present disclosure also provides methods of stratifying groups of patients based on risk of wound development and methods of reducing incidence of tissue damage in a care facility. The present disclosure also provides methods to analyze trends of perfusion or oxygenation measurements to detect tissue damage before it is visible, and methods to compare bisymmetric perfusion values to identify damaged tissue.

Abstract: A sensor system has a low-noise sensor controller providing communications between an active-temperature-regulated optical sensor and an external monitor. A low-noise sensor controller drives optical emitters, receives resulting detected signals after attenuation by a blood perfused tissue site and communicates the detector signals to the attached signal processor. An optically-isolated controller front-end receives and digitizes the detected signals. A controller serializer transmits the digitized detector signal to the processor via a single, shielded coaxial cable.

Abstract: A wearable device includes a housing; a wrist band attached to the housing; first and second emitters positioned within the housing and configured to respectively emit, through a back of the housing, a first beam of electromagnetic radiation having a first infrared (IR) wavelength and a second beam of electromagnetic radiation having a second IR wavelength. The second IR wavelength is different from the first IR wavelength. The wearable device also includes a photodetector positioned within the housing and filtered to detect a set of electromagnetic radiation wavelengths including the first IR wavelength and the second IR wavelength; and a matter differentiation circuit configured to indicate, at least partly in response to signals indicating amounts of the first IR wavelength and the second IR wavelength received by the photodetector, whether the back of the housing is likely proximate to human tissue.

Abstract: Data about concentration of one or more types of molecules present within a human body are determined noninvasively using radio frequency signals. These signals generated at very low power levels are emitted and acquired using an antenna mounted to a wearable device. Information about changes to the signals is indicative of the concentration of one or more types of molecules within the user. The antenna includes two or more elements with a varying distance between them which reduces or eliminates power reflection and improves overall efficiency. The varying distance provides a first impedance at terminals of the antenna and a second impedance elsewhere on the antenna, such as midway along a long axis of the antenna. The first impedance matches an impedance of a transmitter output, a receiver input, or both. The second impedance results in the signal extending away from the antenna towards the user.

Abstract: An apparatus for measuring foot blood flow has a platform with a platform contact surface configured to receive a foot force from a user placing their foot on the contact surface. The apparatus also has a plurality of PPG sets (having at least one light source and at least one detector) extending through the platform contact surface, and a plurality of springs. Each PPG set is coupled with one or more of the springs to movably couple with the platform. In addition, each spring is biased to produce a biasing force via its coupled PPG set when the contact surface of the platform receives the foot. To maintain consistent pressure against the skin and good signal to noise ratio, each PPG set and its corresponding one or more springs are configured so that the biasing force has a magnitude that is substantially independent of the foot force magnitude.

Abstract: A transdermal oxygen patch measures an oxygen concentration based on transcutaneous oxygen diffusing through an epidermal surface of a patient. Transcutaneous oxygen differs from hemoglobin-bound oxygen often measured in a patient blood flow. The patch employs an indicator responsive to an oxygen presence for emitting light having an intensity and lifetime (duration) based on the oxygen presence. An optical receptor is in communication with logic for receiving the intensity of emitted light and computing the oxygen concentration based on the received intensity and lifetime (duration). A wireless transmitter conveys the results to a base station or monitoring counterpart for untethered patient monitoring. Low power demands and circuit footprint are amenable to a wearable device such as a patch for continuous use.

Abstract: The accuracy of physiological data measured through contact with skin can be validated by characterizing the forces at the surfaces where data is measured. Conventional devices do not monitor the fit of skin-based sensors, making the accuracy and confidence in physiological data dependent on the user ensuring that the device is fitted properly. Over time, the seating of a device will vary due to changes in user activity and the need to periodically remove a device. Inevitably, instances will arise where the device is not fitted correctly, which may result in skewed physiological metrics. By monitoring the forces acting on the housing of a device, the interface of skin sensors can be characterized allowing for confidence metrics in the corresponding physiological data to be determined. In some cases, a user can be notified when a device is not seated properly, and in some cases, data may even be calibrated based on the fit of a device.

Abstract: A patient monitoring sensor having a communication interface, through which the patient monitoring sensor can communicate with a monitor is provided. The patient monitoring sensor includes a light-emitting diode (LED) communicatively coupled to the communication interface and a detector, communicatively coupled to the communication interface, capable of detecting light. The patient monitoring sensor includes a layer of material is provided over protruding components on the patient-side of the sensor to reduce the contact pressure of such protruding components.