There is provided a pulse wave detector. A body portion includes a pulse wave detection sensor which detects a pulse wave from an artery in a wrist of a user. A strip-shaped band member secures the body portion to the wrist. In a secured state where the body portion is secured to the wrist with the band member, the body portion is placed in a position where a process of an ulna in the wrist or a process of a radius in the wrist is exposed. The band member includes a first region, and a second region which is higher in stretchability than the first region. In the secured state, the second region is at least in contact with the process of the ulna in the wrist or the process of the radius in the wrist.

A regional oximetry system comprises a pod having a pod housing defining a sensor end and an opposite monitor end. A dual sensor connector is in electrical communication with the sensor end of the pod housing. A monitor connector is in electrical communication with the monitor end of the pod housing. An analog board is disposed within the pod housing and is in electrical communications with the dual sensor connector. The analog board receives and digitizes sensor signals from at least one optical sensor plugged into the dual sensor connector. A digital board is disposed within the pod housing and in electrical communications with the analog board and the monitor connector. A digital signal processor (DSP) is mounted on the digital board and implements a regional oximetry signal processor so as to receive digitized sensor signals from the analog board, derive regional oximetry parameters from the digitized sensor signals and communicate the regional oximetry parameters to the monitor connector for display on an attached monitor.

Embodiments are disclosed that enable an electronic device to instruct as user how to user one or more noninvasive sensors to measure one or more physiological parameters of a patient. In one embodiment, the measured parameters are used to obtain a diagnosis, such as a diagnosis of a critical congenital heart defect.

A device for monitoring a health parameter of a person includes a semiconductor substrate, and an antenna array including at least one transmit antenna connected to the semiconductor substrate and configured to transmit radio waves below the skin surface of a person and a two-dimensional array of receive antennas connected to the semiconductor substrate and configured to receive radio waves, the received radio waves including a reflected portion of the transmitted radio waves, wherein the semiconductor substrate includes circuits configured to generate signals that correspond to an alignment of the antenna array relative to a vein in the person in response to the received radio waves, and means for determining an alignment of the antenna array relative to a vein in the person in response to the generated signals, and means for outputting a signal that is indicative of the determined alignment of the antenna array relative to the vein.

One or more electromagnetic radiation sources, such as a light emitting diode, may emit electromagnetic waves into a volume of space. When an object enters the volume of space, the electromagnetic waves may reflect off the object and strike one or more position sensitive detectors after passing through an imaging optical system such as glass, plastic lens, or a pinhole located at known distances from the sources. Mixed signal electronics may process detected signals at the position sensitive detectors to calculate position information as well as total reflected light intensity, which may be used in medical and other applications. A transparent barrier may separate the sources and detectors from the objects entering the volume of space and reflecting emitted waves. Methods and devices are provided.

A headset for detecting brain electrical activity may include a flexible substrate having first and second ends each configured to engage an ear of a subject and dimensioned to fit across the forehead of a subject. The headset may also include a plurality of electrodes disposed on the substrate and configured to contact the subject when the headset is positioned on the subject. First and second electrodes may contact top center and lower center regions of the forehead, respectively, third and fourth electrodes may contact front right and from left regions of the forehead, respectively, fifth and sixth electrodes may contact right side and left side regions of the forehead, respectively, and electrodes included within the s curing devices may contact the ear regions. The third and fourth electrodes may be moveable in at least a vertical direction relative to the other electrodes.

A processor-implemented method includes obtaining measurement data indicative of a physiological condition measured by a sensing arrangement located at a site on a body, determining a lag associated with the sensing arrangement based on a relationship between the measurement data and reference data, and identifying, based on the lag, the site at which the sensing arrangement is located from a plurality of sites on the body.

System and method for non-invasive monitoring of physiological measurements of a subject, including at least one monitoring device, to detect changes in measured physiological signals, the monitoring device including at least one measuring unit, wherein each measuring unit includes: at least two light emitting sources, and at least one sensor, to detect light beams emitted from the at least two light emitting source, and a computerized device, in communication with the at least one monitoring device, the computerized device to receive data from monitoring device, wherein the monitoring device is configured to be removably attachable to the subject's body.

A medical sensing system (100) includes an elongate interventional device (101) and an adjustable capacitance circuit (102). The elongate interventional device (101) includes a sensor (103) having a capacitance (C.sub.ss). The elongate interventional device (101) also includes a first electrical conductor (104) and a second electrical conductor (105). The first electrical conductor (104) and the second electrical conductor (105) are in electrical contact with the sensor (103) and extend along the elongate interventional device (101). The elongate interventional device (101) also includes i) an electrically conductive shield (106) that overlaps the electrical conductors (104, 105) and/or ii) an electrically conductive shaft (107). The adjustable capacitance circuit (102) provides an adjustable capacitance (C.sub.Adj1, C.sub.Adj2) between at least one of the electrical conductors (104, 105) and i) the electrically conductive shield (106) that overlaps the electrical conductors (104, 105) and/or ii) the electrically conductive shaft (107).

An on-body sensing system (30) comprises a plurality of skin interface elements for coupling electrical signals to and from the body. The system is adapted to derive an indication of a position of at least one positionable interface unit (32) based on transmission of signals between the positionable unit and a set of spatially separated reference units (34), the reference units being positioned at a set of known locations on the body. Transmitted signals are sensed at multiple pairs (52) of electrodes on each reference unit and signal characteristics derived for each pair, and based on this a direction of arrival of the signal determined. By collating all of the measured arrival angles, and by reference to a reference dataset containing information indicative of known signal arrival angles when signals are transmitted internally between the reference units themselves, an indication of position of the positionable unit is derived.