Abstract: An imaging module of the invention including a flexible wiring substrate that includes: a first end portion including a connector; a second end portion including a mount portion; a mounting portion on which an imaging device is mounted; a first bend portion bended and provided between the mounting portion and the first end portion; and a second bend portion bended and provided between the mounting portion and the second end portion. The first end portion and the second end portion overlap each other at a rear side opposite to an imaging surface of the imaging device, a cable is connected to a surface of the first end portion on the opposite side of the second end portion, and a capacitor is mounted on a surface of the second end portion on the opposite side of the first end portion.

Abstract: There are provided an endoscope system, a processor device, and an operation method of an endoscope system that can calculate an accurate oxygen saturation by reducing artifacts. An endoscope system includes: an oxygen saturation correction unit that calculates the amount of change in oxygen saturation in the latest second period with respect to the oxygen saturation in the past first period and that maintains a value of the oxygen saturation in the second period in a case in which the amount of change is less than a threshold value and corrects the oxygen saturation in the second period to a value obtained as a result of setting the amount of change to the threshold value in a case in which the amount of change is equal to or greater than the threshold value; and an oxygen saturation image generation unit that generates an oxygen saturation image using the oxygen saturation in the second period.

Abstract: A guidewire comprises an elongate metal core, an inner layer, an optical core, and an outer layer. The metal core is configured to communicate torsional motion from a proximal end of the metal core to the distal end of the metal core. The inner layer extends about the metal core and has a first index of refraction. The optical core is disposed about the inner layer, wherein the optical core is configured to transmit light along the length of the guidewire. The optical core has a second index of refraction, which is greater than the first index of refraction. The outer layer is disposed about the optical core and has a third index of refraction. The third index of refraction is less than the second index of refraction.

Abstract: Colposcopes having light emitters and image capture devices and associated methods are disclosed. According to an aspect, a colposcope includes an elongate body having a distal end, a proximate end, and an axis extending between the distal end and the proximate end. The colposcope also includes a balloon attached to the elongate body and configured to be inflated to expand in a direction away from the axis of the elongate body. Further the colposcope includes an image capture device attached to the distal end of the elongate body and positioned to capture images of an area outside the elongate body. The colposcope also includes one or more light emitters attached to the distal end of the elongate body and positioned to generate and direct light towards the area outside of the elongate body.

Abstract: The invention relates to an apparatus (100) for monitoring the quality of an endoscopy, in particular a colonoscopy, performed on an individual (11), said apparatus includes: an elongate flexible endoscopic arm (2) adapted to be inserted into the large intestine (4) of an individual; and a sensor system (14) adapted to be arranged outside the body of an individual; and a quality assessment system (16) for evaluating the quality of a specific endoscopy procedure performed on an individual. The invention provides improvements in the quality of an endoscopic insertion of an endoscope in the large intestine of an individual. Furthermore, the invention provides for an optimized training of the medical staff performing the colonoscopy in order to improve the skills of that medical staff. Finally, the invention provides for an objective assessment as to the quality of an endoscopy.

Abstract: A dilation system includes a handle, guide member, balloon dilation member, balloon, dilation member movement actuator, and endoscope. The handle is configured to provide single-handed use to a user. The handle includes a first and second body member pivotably coupled together such that the first body member and the second body member are configured to pivot toward and away from one another. The handle includes a rotation mechanism configured to impart rotation upon the guide member. The handle further includes a locking feature configured to lock endoscope in position relative to the handle. The handle may further include a rotation limiting feature configured to limit rotation of the guide member and or the body members. The dilation member movement actuator is configured to translate to thereby cause translation of the balloon dilation member. One or more components of the dilation system may include a plurality of measure markings.

Abstract: Methods and systems for obtaining an ocular aberration measurement of an eye of a patient are provided. Exemplary techniques involve obtaining a first induced metric for the eye that corresponds to a first accommodation state of the eye, obtaining a second induced metric for the eye that corresponds to a second accommodation state of the eye, and determining a natural metric of the eye based on the first and second induced metrics. An induced metric may include a pupil size or a spherical aberration. Techniques can also include determining a target metric for the eye base on the natural metric, determining whether an actual metric of the eye meets the target metric, obtaining an ocular aberration measurement of the eye if the actual metric meets the target metric, and determining a treatment for the eye based on the ocular aberration measurement.

Abstract: Technology to determine the angle of repose of a lens, such as the angle of repose of a contact lens on an eye, includes storing an image including the lens captured using a camera and executing graphical user interface logic. The graphical user interface logic includes a frame or frames including the captured image, and graphical constructs prompting input identifying a set of locations on the captured image that are usable to define a location of the lens in the image, and a location usable to define an angle of repose of the lens in the image. The input data accepted via the graphical user interface is processed to determine angle of repose of the lens. The angle of repose of the lens is used to produce a specification for a lens.

Abstract: An ophthalmologic photographing apparatus includes: a photographing optical system that includes a scanning unit for scanning an examinee's eye with measurement light to obtain a tomographic image of the examinee's eye; an observing optical system that includes a light-receiving device for receiving reflected light from the examinee's eye to obtain a moving image of a front image of the examinee's eye based on a light-receiving signal from the light-receiving device; a display controller for displaying the front image acquired by the observing optical system in a still state on a monitor as well as enabling setting of a capturing position of the tomographic image, the setting using the front image; and a drive controller for controlling the scanning unit to acquire the tomographic image in accordance with the capturing position.

Abstract: An apparatus for implementing a method for determining the dominant eye of a spectacle wearer (1), includes a target (2), an element (3, 4) for occulting at least one eye, and a sighting device (5, 50) equipped with an optical window (6). The principal feature of the apparatus is that the sighting device (5, 50) includes an electronic sensor making it possible to identify the direction of movement of the sighting device (5, 50), during the method during various steps of viewing the target (2).

Abstract: Disclosed are a hand-held vision detecting device and a method for using the hand-held vision detecting device to realize various eyesight measurements without wearing glasses and the steps therefor, wherein the hand-held vision detecting device at least comprises: an imaging lens group consisting of at least one imaging lens and an eye chart. The cornea of the subject can be located at the focal point at one side f the imaging lens group. The center of the eye chart is provided at the other side of the imaging lens group and can move forwards and backwards along the optical path. People can detect vision anytime and anywhere through this device and detection method via simple and easy operations, and the detection results are accurate.

Abstract: Methods of performing en face Doppler total retinal blood flow measurement are disclosed. The methods involve obtaining a set of structural OCT scans; calculating a noise-reduced set of Doppler phase shift images by dividing the full spectrum OCT fringe data into a set of narrower filtered frequency bands for phase shift calculation; removing bulk motion along a depth direction; detecting retinal vessels in the set of images; applying a phase unwrapping algorithm to the images; classifying the vessels as veins and arteries; and calculating total retinal blood flow based on that classification.

Abstract: Apparatus and techniques can include using one or more of a portable or fixed optical system to obtain images of a desired anatomical target, such as the fundus region of a human eye. The optical system can include one or more of a laser-based focusing target, a laser-based fixation target, or a removable or adjustable alignment assembly. Such an alignment assembly can provide or allow user alignment based on using anatomical landmarks other than the fundus being imaged. One or more of the apparatus or techniques can be implemented in an optical assembly included as a portion hand-held fundus camera, such as including or using a consumer or commercial digital camera to capture an image.

Abstract: Provided are mechanisms and processes for a more effectively monitoring infants to enhance caregiving and infant development. A system may include a wearable infant monitoring device having multiple sensors, a transmission interface, and a wearable casing. The multiple sensors gather measurement data associated with activity of an infant. The transmission interface transmits the measurement data detected by the multiple of sensors to a remote monitoring hub. A wearable casing is configured to house the plurality of sensors and transmission interface. The wearable casing and the multiple sensors include mechanisms to determine whether the infant is prone or supine.

Abstract: Provided are mechanisms and processes for an infant caregiver system. The system includes a platform interface, platform storage, and a platform processor. The platform interface is configured to receive measurement data transmitted from an infant monitoring system. The infant monitoring system includes an infant monitoring device having a plurality of sensors that gather the measurement data corresponding to activity associated with a first infant. Platform storage is configured to store learning content and infant de-identified data. An infant profile is associated with the first infant and infant de-identified data is associated with a plurality of infants. The platform processor is configured to provide a platform portal. The platform portal serves as a user interface through which a caregiver associated with the first infant can access information from platform storage.

Abstract: Provided are mechanisms and processes for an infant data aggregation system. The system includes a platform interface and a platform processor. A platform interface is configured to receive measurement data from multiple infant monitoring systems, each of the multiple infant monitoring systems including an infant monitoring device and an infant monitoring hub. Each of the plurality of infant monitoring systems is associated with a corresponding infant. A platform processor is configured to remove personally identifiable information associated with the measurement data to generate infant de-identified data and analyze the measurement data from the plurality of infant monitoring systems to generate a dynamic model reflecting infant trends associated with infants of different ages. The dynamic model is viewable by users associated with infant monitoring systems. The platform interface may be further configured to send the dynamic model to a first infant monitoring system.

Abstract: Provided are mechanisms and processes for an infant data aggregation system. The system includes a platform interface and a platform processor. A platform interface is configured to receive measurement data from multiple infant monitoring systems, each of the multiple infant monitoring systems including an infant monitoring device and an infant monitoring hub. Each of the plurality of infant monitoring systems is associated with a corresponding infant. A platform processor is configured to remove personally identifiable information associated with the inferences received in order to generate infant de-identified inferences and analyze the inferences received from the plurality of infant monitoring systems in order to generate a dynamic model reflecting infant trends relating to the inference for infants of different ages. The dynamic model is viewable by users associated with infant monitoring systems.

Abstract: Provided are mechanisms and processes for an infant data aggregation system. The system includes a platform interface and a platform processor. A platform interface is configured to receive measurement data transmitted from multiple infant monitoring systems. Each of the multiple infant monitoring systems include an infant monitoring device and an infant monitoring hub. The infant monitoring device is configured to gather measurement data for an infant and the monitoring hub configured to process the measurement data. A platform processor is configured to analyze the measurement data to identify patterns including a first pattern of activity of infants associated with the multiple infant monitoring systems. The first pattern of activity is associated with an inference about the infants. The platform processor is further configured to generate a model for the inference based on the first pattern of activity for infants of various ages.

Abstract: Provided are mechanisms and processes for an infant data aggregation system. The system includes a platform interface and a platform processor. A platform interface is configured to receive measurement data from multiple infant monitoring systems, each of the multiple infant monitoring systems including an infant monitoring device and an infant monitoring hub. Each of the plurality of infant monitoring systems is associated with a corresponding infant. A platform processor is configured to remove personally identifiable information associated with the observations received in order to generate infant de-identified observations and analyze the observations received from the plurality of infant monitoring systems in order to generate a dynamic model reflecting infant trends relating to the observation for infants of different ages. The dynamic model is viewable by users associated with infant monitoring systems.

Abstract: Provided are mechanisms and processes for an infant data aggregation system. The system includes a platform interface and a platform processor. A platform interface is configured to receive measurement data transmitted from multiple infant monitoring systems. Each of the multiple infant monitoring systems includes includes an infant monitoring device and an infant monitoring hub. The infant is monitoring device configured to gather measurement data for an infant and the monitoring hub configured to process the measurement data. A platform processor is configured to analyze the measurement data to identify including a first pattern of activity of infants associated with multiple infant monitoring systems. The first pattern of activity is associated with an observation about the infants. The platform processor is further configured to generate a model for the observation based on the first pattern of activity for infants of various ages.

Abstract: A method and apparatus for surface scanning in medical imaging is provided. The surface scanning apparatus comprises an image source, a first optical fiber bundle comprising first optical fibers having proximal ends and distal ends, and a first optical coupler for coupling an image from the image source into the proximal ends of the first optical fibers, wherein the first optical coupler comprises a plurality of lens elements including a first lens element and a second lens element, each of the plurality of lens elements comprising a primary surface facing a distal end of the first optical coupler, and a secondary surface facing a proximal end of the first optical coupler.

Abstract: A method of operating a fluorescent imaging system during an open surgery procedure includes concurrently illuminating a tissue with NIR excitation light and visible light, wherein NIR fluorescent light is emitted from the tissue and collecting the NIR fluorescent light and reflected visible light that is reflected from the tissue. The method also includes blocking at least a portion of the NIR excitation light reflected from the tissue and attenuating the reflected visible light. The method further includes imaging, using a camera, the NIR fluorescent light and the attenuated reflected visible light.

Abstract: Provided are mechanisms and processes for determining physiological measurements associated with an infant. In one example, a system includes an infant monitoring device and a monitoring hub. An infant monitoring device interface is configured to receive measurement data transmitted wirelessly from multiple sensors associated with an infant monitoring device. The infant monitoring device is configured to be worn by an infant. A camera interface is configured to receive sensor data from a camera. The camera located in proximity to the infant. The sensor data comprises visual data of the infant. A processor is configured a physiological measurement of the infant based on the measurement data received from the infant monitoring device and the visual data received from the camera.

Abstract: A guide member system includes a guide member, a light source, and a detector. The guide member comprises at least one illumination fiber. The at least one illumination fiber distally transmits the light projected by the light source from the proximal end of the guide member to the distal end of the guide member. The distal end of the guide member is projects the distally transmitted light. The distal end of the guide member receives light projected from the distal end of the guide member and reflected back toward the distal end of the guide member. The at least one illumination fiber proximally transmits the reflected light from the distal end of the guide member to the proximal end of the guide member. The proximal end of the guide member projects the proximally transmitted light toward the detector. The detector detects the proximally transmitted light.

Abstract: A dental apparatus is provided. The dental apparatus include a handle. A controller operably couples to the housing. A subsystem is in operable communication with the controller and configured to generate an excitation signal causing an emitted fluorescence light to be reflected back to the subsystem and to the controller for analyzing one or more properties of the emitted fluorescence light. The one or more properties corresponding to a decay time of the emitted fluorescence light, wherein plaque emitted florescence light decays faster than tooth emitted florescence light. The controller is programmed to analyze detected emitted fluorescence light to determine if the emitted fluorescence light is indicative of a plaque emitted fluorescence decay time or tooth emitted florescence light decay time to detect the presence of one of dental plaque and tooth demineralization.

Abstract: A photoacoustic apparatus comprises a light source; an irradiation unit configured to radiate light from the light source to an object that contains a contrast agent; a receiving unit configured to receive acoustic waves generated when the contrast agent absorbs the light radiated by the irradiation unit and output an electrical signal; a correction processing unit configured to correct a signal strength of the electrical signal, based on a temporal change in a concentration of the contrast agent contained in the object; and an acquiring unit configured to acquire characteristics information on the object, based on the electrical signal that has been corrected by the correction processing unit.

Abstract: An exemplary embodiment of the present invention discloses a microwave signal processing method and apparatus which precisely focus a microwave onto a specific part of a biological tissue and rapidly images a temperature distribution in the biological tissue generated thereby.

Abstract: Systems configured to acquire temperature signals from an Abreu Brain Thermal Tunnel (ABTT), to analyze the temperatures signals, and to determine a condition of a human body from the analysis, and a method for doing the same, are described. In addition, systems for application of thermal signals to the ABTT for treatment of conditions are described.

Abstract: Novel methods and systems to map the structure of blood vessels and monitor the flow of blood through these vascular networks using thermal imaging techniques. To obtain high contrast thermal images of the vascular structure in tissue, there must be a temperature difference between the blood/blood vessels and surrounding tissue. If the blood and blood vessels are warmer than the surrounding tissue, the vessels will appear brighter in thermal infrared images. A temperature contrast between blood vessels and the surrounding tissue can be achieved through selective heating of the blood. Hemoglobin has major absorption peaks near 420 and 530 nm, while absorption due to water (the dominant component of soft tissue) is significantly lower at these wavelengths. Irradiation of blood and tissue at these wavelengths produces selective heating of the blood compared to the surrounding soft tissue.

Abstract: Provided are a pressure sensor including hybrid electronic sheet and a wearable device including the pressure sensor. The pressure sensor has excellent controllable electric characteristics and excellent mechanical flexibility and stability, and measures, for example, pressure in a simple and highly reproducible manner in which a resistance of a component in a sensor varies depending on applied pressure.

Abstract: A plethysmographic respiration processor is responsive to respiratory effects appearing on a blood volume waveform and the corresponding detected intensity waveform measured with an optical sensor at a blood perfused peripheral tissue site so as to provide a measurement of respiration rate. A preprocessor identifies a windowed pleth corresponding to a physiologically acceptable series of plethysmograph waveform pulses. Multiple processors derive different parameters responsive to particular respiratory effects on the windowed pleth. Decision logic determines a respiration rate based upon at least a portion of these parameters.

Abstract: An embodiment of a device for reporting a heart failure status of a patient comprises: a parameter acquisition module configured to acquire at least one trended heart failure parameter; a predetermined event acquisition module configured to acquire at least one predetermined event corresponding to the at least one trended heart failure parameter, wherein each of the at least one predetermined event represents an event condition where a predetermined event definition is satisfied; an alert acquisition module configured to acquire at least one heart failure status alert associated with the at least one predetermined event, wherein each of the at least one alert represents an alert condition where a predetermined alert definition is satisfied; and an output communication module configured to communicate the at least one heart failure status alert.

Abstract: Disclosed herein is a framework for facilitating patient signal analysis. In accordance with one aspect, the framework receives signal data including mechanical signal data, wherein the mechanical signal data is generated in response to mechanical contraction of blood vessels. A region of interest is segmented from the mechanical signal data. One or more mechanical signal ratios may be determined based on parameters extracted from the segmented region of interest to characterize waveform changes. A report may then be generated based at least in part on the one or more mechanical signal ratios.

Abstract: Systems and methods are disclosed for using patient-specific anatomical models and physiological parameters to predict viability of a target tissue or vessel to guide diagnosis or treatment of cardiovascular disease. One method includes: receiving a patient-specific vessel model and a patient-specific tissue model of a patient anatomy; receiving one or more patient-specific physiological parameters (e.g. blood flow, anatomical characteristics, etc.) for one or more physiological states; estimating a viability characteristic of the patient-specific tissue or vessel model (e.g., via a trained machine learning algorithm), using the patient-specific physiological parameters; and outputting the viability characteristic to an electronic storage medium or display.

Abstract: An implantable vital sign sensor including a housing including a first portion, the first portion defining a first open end, a second open end opposite the first end, and a lumen there through, the first portion being sized to be implanted substantially entirely within the blood vessel wall of the patient. A sensor module configured to measure a blood vessel blood pressure waveform is included, the sensor module having a proximal portion and a distal portion, the distal portion being insertable within the lumen and the proximal portion extending outward from the first open end.

Abstract: A biological information processing apparatus includes a pulse wave acquisition part that acquires a pulse wave signal of a user, an electrocardiogram acquisition part (heart rate acquisition part) that acquires an electrocardiogram signal of the user, and a processor (analyzer) that calculates biological information of the user based on the pulse wave signal. The processor (analyzer) analyzes the pulse wave signal based on a heart rate calculated from the electrocardiogram signal and calculates the biological information of the user if the pulse wave signal does not satisfy a predetermined condition.

Abstract: Disclosed herein is a framework for facilitating thermal patient signal analysis. In accordance with one aspect, the framework receives patient signal data including thermal signal data. The framework then segments a region of interest from the thermal signal data. One or more cardiac output indices may be determined based on one or more parameters extracted from the segmented region of interest to characterize cardiac output or stroke volume. A report may then be generated based at least in part on the one or more cardiac output indices.

Abstract: Provided are mechanisms and processes for more effectively monitoring infants to enhance caregiving and infant development. In one example, a platform receives measurement data from numerous infant monitoring systems corresponding to different infants in disparate locations and having different ages and developmental levels. Each of the infant monitoring systems includes an infant monitoring device and an infant monitoring hub. The platform analyzes the measurement data to generate a developmental model reflecting a range of characteristics corresponding to the numerous infants. The developmental model, which is customizable for individual infants, is sent to a first infant monitoring system.

Abstract: Provided are mechanisms and processes for more effectively monitoring infants to enhance caregiving and infant development using an infant health monitoring system. In one example, the system includes an infant monitoring device interface that receives measurement data transmitted wirelessly from an infant monitoring device associated with a first infant. The infant monitoring device includes sensors that gather the measurement data corresponding to the first infant. The system also includes a hub processor that compares the measurement data to a health model to determine if a health concern is present. The health model is generated at a remote platform based on aggregated measurement data from multiple infant monitoring systems and sent to the system. The hub processor generates a notification for a caregiver associated with the first infant if a health concern is present.

Abstract: A light emitting unit emits first light and second light having different wavelengths. A photoreception unit outputs first and second signals depending on photoreception intensities of the first and second light transmitted through or reflected by biological tissue. A processing period setting unit extracts a signal cycle corresponding to the cardiac cycle for the first or second signal and sets a processing period in a first part dominantly affected by arterial blood flowing to the tissue or a second part dominantly affected by venous blood flowing from the tissue in the signal cycle. First and second change amount acquisition units obtain first and second change amounts corresponding to the attenuation change amounts of the first and second light from the first and second signals in the processing period. A concentration calculation unit calculates the concentration of light absorbing substance in blood from the first and second change amounts.

Abstract: A system and method for analyzing blood flow in a subject's brain is provided. In some aspects, the method includes analyzing fMRI data to identify signals related to blood flow, and selecting a zero time lag seed regressor using the identified signals. The method also includes correlating the selected seed regressor to identify a subset of the fMRI data that correlates with the seed regressor and is offset in time, combining the subset of the data to determine a time-delayed regressor, and performing repetitions to obtain a number of time-delayed regressors, where for each repetition, the seed regressor is adjusted using a previous time-delayed regressor. The method further includes analyzing the data using the time-delayed regressors to determine blood delivery from vessels across the brain, and generating a report. In some aspects, a second recursive procedure may be performed using an optimized seed regressor obtained from a first recursive procedure.

Abstract: An implantable medical device is described. In an example, the implantable medical device includes an electromechanical substrate and sensor, such as a pressure sensor, disposed on the substrate. At least a portion of the sensor is packaged via a liquid encapsulation. The packaging includes a shaped flexible outer membrane that surrounds at least the portion of the sensor. The packaging also includes a hydrophobic liquid disposed between at least the portion of the pressure sensor and the flexible outer membrane. The implantable medical device can be a part of a medical system used for monitoring medical conditions or performing medical operations based on the implantable medical device. Additionally, manufacturing methods are described for packaging the sensor in a liquid encapsulation.

Abstract: A system for transducing arterial pressure includes a one-piece flexible cap configured to fit around a flexible piezo-electric sensor that is configured to alter an internal resistance upon deflection. The flexible cap includes a deflection wall configured to deflect towards the flexible piezo-resistive sensor in proportion to pressure applied by the artery. A pressure-transducing medium is sealed between the one-piece flexible cap and the flexible piezo-resistive sensor, such that deflection of the deflection wall towards the flexible piezo-resistive sensor causes proportional deflection of the flexible piezo-resistive sensor.

Abstract: A wrist-worn pressure sensing device includes a pressure sensor. The wrist-worn pressure sensing device also includes a first strap that sets the position of the pressure sensor on a wearer's wrist and a second strap that engages with the first strap to adjust the overall length of the strap without moving the set position of the pressure sensor on the wearer's wrist.

Abstract: A blood pressure measurement cuff is worn on a measurement site that extends in longitudinal direction in substantial round bar shape and gradually becomes thinner from one side to another side in longitudinal direction. A band-shaped body is included which is configured to contain an air bladder between an inner cloth that is to come into contact with the measurement site and an outer cloth that opposes the inner cloth, the band-shaped body being configured to be wrapped in a circumferential direction around the measurement site. A plate member is included which is provided between the outer cloth and the air bladder in a thickness direction and in a region that corresponds to at least a portion in the circumferential direction of the band-shaped body. The thickness of the plate member gradually becomes thinner from the one side to the other side in the longitudinal direction.

Abstract: What is disclosed is a system and method for classifying a time-series signal as being ventricular premature contraction, ventricular tachycardia, or normal sinus rhythm in a patient being monitored for cardiac function assessment. One embodiment hereof involves the following. A time-series signal is received which contains frequency components that relate to the function of the subject's heart. Signal segments of interest are identified in the time-series signal. Time-domain features, frequency-domain features, and non-linear cardiac dynamics are extracted from each of the identified signal segments of interest. The extracted features and dynamics become components of at least one feature vector associated with each respective signal segment of interest. Signal segments are then classified as one of: ventricular premature contraction, ventricular tachycardia, and normal sinus rhythm, based on each signal segment's respective feature vector(s).

Abstract: What is disclosed is a system and method for assessing risk for ventricular tachycardia from a time-series signal of a patient monitored for cardiac function assessment. One embodiment involves receiving a time-series signal which contains frequency components that relate to the function of the subject's heart. Signal segments of interest are identified in the time-series signal. Time-domain features are extracted for each signal segment of interest. The time-domain features are arranged into a two dimensional feature vector. Each feature vector is associated with a respective signal segment. A magnitude of each signal segment's respective feature vector is determined. Signal segments are classified as being ventricular premature contraction based on each segment's associated magnitude.

Abstract: An optical pulse rate detector includes at least one emitter, a photodetector, and an adaptive filter. The emitter transmits light at a first light output level and a second light output level into body tissue of a user. The photodetector receives reflected light from the body tissue and produces a voltage indicative of an amount of the reflected light. The adaptive filter receives a first output signal from the photodetector indicative of an amount of the light at the first light output level reflected from the body tissue and a second output signal indicative of an amount of the light at the second output level reflected from the body tissue. The adaptive filter removes the second output signal from the first output signal to generate a pulse rate signal indicative of a pulse rate of the user.

Abstract: A light guide system for a physiological sensor includes a light channel in optical communication with an emitter and a light channel in optical communication with a detector. The light channels are formed of a bio-compatible resilient plastic, such as a silicone, that is blended with a colorant. Each light channel has an optical transmission spectrum that passes the emitter spectral band and rejects most or all ambient light. The colorant can be a pigment provided as a suspension in a liquid or a dye provided in liquid form. The optical transmission spectrum defines a longpass optical filter where the shortest wavelength of the optical spectrum of the emitter is greater than the transition wavelength of the longpass optical filter. Each of the light channels is configured to be in contact with the skin, thereby reducing or eliminating optical loss due to transmission through an air gap.

Abstract: A wearable device includes: a touch screen; an acceleration sensor configured to generate an acceleration signal; an optical sensor using a light source and configured to generate a touch interrupt signal; and a control unit configured to detect a wearing state of the wearable device, the wearing state of the wearable device including a not-wearing state for the wearable device, a wrist wearing state, and a hand gripping state on the basis of the acceleration signal and the touch interrupt signal, and to execute a function corresponding to the wearing state of the wearable device.