摘要:
This relates to systems and methods for determining one or more of a user's physiological signals. The one or more of the user's physiological signals can be determined by measuring pulsatile blood volume changes. Motion artifacts included in the signals can be canceled or reduced by measuring non-pulsatile blood volume changes and adjusting the signal to account for the non-pulsatile blood information. Non-pulsatile blood volume changes can be measured using at least one set of light emitter-light sensor. The light emitter can be located in close proximity (e.g., less than or equal to 1mm away) to the light sensor, thereby limiting light emitted by the light emitter to blood volume without interacting with one or more blood vessels and/or arterioles. In some examples, the systems can further include an accelerometer configured to measure the user's acceleration, and the acceleration signal can be additionally be used for compensating for motion artifacts.
摘要:
The present disclosure provides devices and methods for improved hemodynamic monitoring, including techniques for reducing signals related to hemodynamic activity outside the tissue or region of interest.
摘要:
Method and apparatus can be provided according to an exemplary embodiment of the present disclosure. For example, with at least one first section of an optical enclosure, it is possible to provide at least one first electro-magnetic radiation. In addition, with at least one second section provided within the enclosure, it is possible to cause, upon impact by the first radiation, a redirection of the first radiation to become at least one second radiation. Further, with at least one third section of the optical enclosure, it is possible to cause at least one second radiation to be provided to a tissue. For example, the redirection of the first radiation causes, at least approximately, a uniform optical illumination on of a surface of the tissue.
摘要:
Die Erfindung betrifft ein System sowie ein entsprechendes Verfahren zur optischen Kohärenztomographie mit einem Interferometer und einem Sensorkopf, über welchen elektromagnetische Strahlung vom Interferometer an ein zu untersuchendes Objekt ausgegeben und vom Objekt reflektierte elektromagnetische Strahlung in das Interferometer zurück geführt werden kann, einem Positionierelement (3) zum Positionieren des Sensorkopfes relativ zu dem zu untersuchenden Objekt mit einer Auflage, welche am Objekt angeordnet und auf welcher der Sensorkopf platziert werden kann, und einem ersten Bereich (4), weleher für die vom Interferometer ausgegebene und vom Objekt reflektierte Strahlung im Wesentlichen durchlässig ist, und einem zweiten Bereich (5), dessen Durchlässigkeit für die vom Interferometer ausgegebene und/oder vom Objekt reflektierte Strahlung von der Durchlässigkeit des ersten Bereichs (4) abweicht, einer Bilderzeugungseinrichtung zur Erzeugung eines oder mehrerer Bilder an- hand der vom Objekt und/oder vom Positionierelement (3), insbesondere vom zweiten Bereich (5) des Positionierelements (3), reflektierten elektromagnetischen Strahlung, einer Anzeigeeinrichtung zur Wiedergabe der erzeugten Bilder und einer Steuerungseinrichtung zur Steuerung der Erzeugung und Wiedergabe der Bilder in der Weise, dass der Sensorkopf anhand der erzeugten und wieder- gegebenen Bilder in eine gewünschte Position auf dem Positionierelement (3) gebracht werden kann. Durch das erfindungsgemäße System und Verfahren wird bei einfacher Handhabung eine zuverlässige und zeitsparende Untersuchung des Objekts ermöglicht.
摘要:
A method and apparatus for noninvasively measuring the concentration of a target analyte in a sample matrix (22), using a fiberless transflectance probe (20). It includes directing a beam of electromagnetic radiation, consisting of at least two components of different wavelengths, to the sample matrix (22) and conducting the backscattered radiation to a detector (18) which outputs a signal indicative of the differential absorption of the two wavelengths in the sample matrix (22). The transflectance probe (20) comprises a tapered tubular housing (50) having an inner reflective surface (52), an optical rod (40) having an outer reflective surface (45), and a detection window (46) which serves as an interface between the probe and the surface of the sample matrix (22). The method and apparatus described are particularly useful in measuring the concentration of glucose in tissue (22) containing blood.
摘要:
A method and apparatus for noninvasively measuring the concentration of a target analyte in a sample matrix (22), using a fiberless transflectance probe (20). It includes directing a beam of electromagnetic radiation, consisting of at least two components of different wavelengths, to the sample matrix (22) and conducting the backscattered radiation to a detector (18) which outputs a signal indicative of the differential absorption of the two wavelengths in the sample matrix (22). The transflectance probe (20) comprises a tapered tubular housing (50) having an inner reflective surface (52), an optical rod (40) having an outer reflective surface (45), and a detection window (46) which serves as an interface between the probe and the surface of the sample matrix (22). The method and apparatus described are particularly useful in measuring the concentration of glucose in tissue (22) containing blood.
摘要:
A system for measuring a physiological rhythm of a subject comprises a light source arranged to emit light, a photodetector arranged to receive the emitted light, a layer of compressible material directly contacting the light source, and a processing device connected to the photodetector and arranged to detect changes in the emitted light received by the photodetector. In a preferred embodiment, the system further comprises multiple light sources each directly contacting the layer of compressible material, wherein each light source is arranged to emit light in turn, so that no more than one light source is emitting light at any one time.
摘要:
A disposable light source device for the non-invasive visualization of veins, arteries or other subcutaneous structures of and objects in the body, or for facilitating and monitoring intravenous insertion or extraction of fluids, including a conforming layer for interfacing and optically coupling with the body surface, and adhering the device to the body portion, and a main light source for directing near infrared light through the conforming layer to illuminate the body. The disposable light source device can also include a light transmissive and electrically insulative layer that is disposed between and electrically insulates the main light source from the body- contacting conforming layer. The disposable light source device can also include a proximity sensor that controls activation of the first light source such that the light source is on only when the conforming layer is brought into proximity to the body surface.