The present disclosure relates to noninvasive methods, devices, and systems for measuring various blood constituents or analytes, such as glucose. In an embodiment, a light source comprises LEDs and super-luminescent LEDs. The light source emits light at at least wavelengths of about 1610 nm, about 1640 nm, and about 1665 nm. In an embodiment, the detector comprises a plurality of photodetectors arranged in a special geometry comprising one of a substantially linear substantially equal spaced geometry, a substantially linear substantially non-equal spaced geometry, and a substantially grid geometry.

The present invention provides a photodiode for a wearable sensor system, the photodiode having a rectangular active area sensitive to wavelengths within the spectral range of 1200 nm to 2400 nm. The present invention also provides a wearable sensor system comprising the photodiode.

The wearable article (200) comprises a sensing component. The electronics module (100) is removably coupled to the wearable article (200). The electronics module comprises a housing and a processor disposed within the housing (101). An interface element (121, 123) interfaces with the sensing component so as to receive signals from the sensing component and provide the same to the processor. A sensor (105) is disposed within the housing (101). The sensor (105) monitors a property of the environment external the electronics module (100) through the housing (101). The housing (101) is constructed such that the sensor (105) has line of sight through the housing (101).

A system and method for positioning a sensor on a subject. In some embodiments, the system includes an instrument holder, the instrument holder being configured to be secured to a subject, and to hold an instrument temporarily.

The present invention relates to a device (100) for determining a vital sign of a subject by use of PPG. The device comprises a processing unit (110) configured to obtain multiple first detection signals derived from electromagnetic radiation (90) from multiple measurement spots (30) on a skin region (12) of the subject illuminated by one or more illumination spots (20), wherein the electromagnetic radiation (90) enters the skin region (12) at the one or more illumination spots (20) and exits the skin region (12) at the multiple measurement spots (30). The processing unit (110) further obtains 3D image information (130) of the skin region (12) which allows determining the actual spot distance (15) between the measurements spots (30) and an illumination spot (20), respectively. This information can be used to interpret the PPG signal more precisely as without having the 3D image information only a projected distance can be determined if the skin surface is tilted. Additionally, this allows averaging PPG signals derived from a homogenous skin area to improve PPG signal strength and reduce noise. A system (500) comprising such a device and a corresponding method are further described.

An electronic device for identifying occurrence of hypotension and a method therefor are provided. The electronic device includes a housing, a user interface, a photoplethysmogram (PPG) sensor exposed through at least part of the housing, a motion sensor disposed in the housing, at least one processor operatively coupled with the user interface, the PPG sensor, and the motion sensor, and a memory operatively coupled with the at least one processor. The memory may store instructions which, when executed by the at least one processor, cause the at least one processor to, based on first data from the motion sensor indicating a change of a selected pattern, identify a blood pressure value based at least in part on second data from the PPG sensor, and based on the identified blood pressure value being lower than a first threshold, provide a notification through the user interface.

A method and system are provided for estimating a physiological parameter using a parameter model determined by a deep neural network. An example method includes training a deep neural network with indirect and direct physiological parameters from a user database. The medical parameters include a respiratory rate, oxygen saturation, temperature, blood pressure, and pulse rate. The method includes determining if a new user belongs in a group. If the parameter model estimated physiological parameter using the closest group to the new user and associated calibration, then the method quantizes the parameter inputs to determine which physiological parameter a new user is most sensitive and to determine a new group and calibration coefficients or curves for the new user.

An adjustable measurement device is described that may include a housing, a power supply, a processor, a communication device, an elastic coupling member, a physiological sensor, and/or a clamp. The housing may be configured to attach to a wearable band that is wearable by a subject. The housing may include a chamber within the housing. The power supply, the processor, the communication device, the elastic coupling member, and or the physiological sensor may be disposed within the chamber. The elastic coupling member may couple the physiological sensor to the housing. A force exerted by the elastic coupling member on the physiological sensor may be in a direction through an opening towards a body part of a subject. As the subject wears the wearable band and the housing is coupled to the wearable band, the physiological sensor may be adjacent to or contact the subject.

A measurement apparatus includes a wearing portion to be worn by a subject and at least one sensor supported by the wearing portion and configured to acquire biological information of the subject while in contact with a measured part of the subject. The sensor contacts the measured part at a predetermined pressure or less while the wearing portion is worn by the subject.

An apparatus is suitable for measuring a photoplethysmogram (PPG). A photoplethysmographic sensor apparatus may include a casing defining a surface, a plurality of optical emitters configured to emit radiation extending from the surface, at least one photo sensor configured to capture radiation emitted by at least a subset of the plurality of optical emitters. At least a first measurement configuration and a second configuration is defined by the plurality of optical emitters and the at least one photo sensor such that the first and the second measurement configuration provide different measurement channels by including at least partially different sets of at least one optical emitter and at least one photo sensor. The first and second measurement configurations define different spatial configurations, each of which is line symmetric with respect to an imaginary line along the surface.