Abstract: Presented are embodiments of an apparatus and methodology for non-invasive, continuous or semi-continuous monitoring of human blood pressure by photoplethysmography (PPG) based sensor system.

Abstract: A method for estimating blood pressure, including: identifying representative PPG pulse curve shapes associated with first and second direct non-invasive blood pressure measurements; generating at least one blood pressure correlation function representing at least a relationship between a first difference between the first shape and the second shape and a second difference between the first direct blood pressure measurement and the second direct blood pressure measurement; obtaining a measured PPG pulse signal from a patient; identifying a measured representative shape of a measured PPG pulse curve from the measured PPG pulse signal; and generating an estimated blood pressure based on the measured representative shape and the at least one blood pressure correlation function.

Abstract: A fall detection device having a wearable housing, a processor, a sensor system operatively connected to the processor and configured to detect a physiological condition of the wearer's body, a motion sensor, a wireless communication module processor, and a memory. The memory stores computer readable instructions that cause the processor to: monitor the motion sensor to detect a decrease in acceleration in the gravitational direction below a first threshold; start a timer upon detecting the decrease in acceleration; monitor the motion sensor to detect a fall-indicative acceleration above a second level prior to the timer reaching a first predetermined time; monitor the motion sensor to detect a recovery-indicative acceleration above a third level prior to the timer reaching a second predetermined time; and activate the wireless communication module to initiate an emergency alert if the fall-indicative acceleration is detected and the recovery-indicative acceleration is not detected.

Abstract: There is disclosed a respiration rate monitoring system and method using a non-invasive device and method of monitoring it nearly continuously. One aspect includes receiving a series of signal data points from an optical sensor, detecting a series of peaks or valleys for the filtered signal data points, determining the time difference between individual peaks or valleys of the series of peaks or valleys to produce a series of time difference values, detecting peaks or valleys for the series of time difference values, determining widths between the peaks or valleys of the series of time difference values, and estimating a respiration rate from the widths between the peaks or valleys of the series of time difference values, and converting the estimation of a respiration rate to an indicator indicative of a respiration rate.

Abstract: Presented are embodiments of an apparatus and methodology integrated in the system for non-invasive, continuous, wearable, remote and mobile monitoring of human blood pressure by photoplethysmography (PPG) based sensor and an electronic processing unit with the embedded radio allowing the reading and transmittal of the read blood pressure data to the remote location.

Abstract: A biosensor device having a housing having an inner surface, a band extending from the housing and configured to enclose an attachment site on a user's body, and a sensor package. The sensor package includes at least one optical emitter oriented to selectively emit a respective first light from the inner surface, and a plurality of optical receivers surrounding the at least one optical emitter and configured to receive reflected light at the inner surface.

Abstract: A photoplethysmographic (“PPG”) device having a housing, a band and a first optical sensor. The band extends from the housing and is configured to enclose an attachment site on a user's body. The PPG device has an inner surface oriented to face the attachment site and an outer surface oriented to face away from the attachment site. The first optical sensor includes at least one first optical emitter oriented to selectively emit a respective first light from the outer surface, and at least one first optical receiver oriented to receive a reflected portion of the respective first light returning to the outer surface. The respective first light is selected from one or more wavelengths operative to reflect from one or more of oxyhemoglobin and deoxyhemoglobin at an observation site on the user's body, the observation site being remote from the attachment site.

Abstract: Disclosed is a PPG signal measurement apparatus comprising a light source for emitting light pulses; a light sensor for receiving reflected light from the light source and generating a sensor signal; an electronic unit including a transimpedance amplifier and an ambient light cancelation unit, a first switch in a front end portion of the light sensor, a second switch in the front end portion of the light sensor, a microcontroller in communication with the light source, the light sensor, and the ambient light cancellation unit.

Abstract: Disclosed are systems and methods of determining the amount of a substance in a living organism. In one embodiment, the method comprises: applying an electrical signature signal to the living organism, wherein the electrical signature signal corresponds to a predetermined amount of the substance; measuring the response of the living organism to the applied signature signal; and determining whether an elevated response has resulted from applying the electrical signature signal, if so, then determining the amount of the substance in the living organism from the predetermined amount of the substance.

Abstract: Disclosed are systems and methods of determining the amount of a substance in a living organism. In one embodiment, the method comprises: applying an electrical signature signal to the living organism, wherein the electrical signature signal corresponds to a predetermined amount of the substance; measuring the response of the living organism to the applied signature signal; and determining whether an elevated response has resulted from applying the electrical signature signal, if so, then determining the amount of the substance in the living organism from the predetermined amount of the substance.

Abstract: Disclosed are systems and methods of determining the amount of a substance in a living organism. In one embodiment, the method comprises: applying an electrical signature signal to the living organism, wherein the electrical signature signal corresponds to a predetermined amount of the substance; measuring the response of the living organism to the applied signature signal; and determining whether an elevated response has resulted from applying the electrical signature signal, if so, then determining the amount of the substance in the living organism from the predetermined amount of the substance.

Abstract: Disclosed are systems and methods of determining the amount of a substance in a living organism. In one embodiment, the method comprises: applying an electrical signature signal to the living organism, wherein the electrical signature signal corresponds to a predetermined amount of the substance; measuring the response of the living organism to the applied signature signal; and determining whether an elevated response has resulted from applying the electrical signature signal, if so, then determining the amount of the substance in the living organism from the predetermined amount of the substance.