789results about "Optical sensors" patented technology

Various wearable health monitoring devices are described herein. Some implementations include one or more emitter chamber covers injection molded out of a first material comprising transparent glass, one or more detector chamber covers injection molded out of a second material comprising transparent glass, and a light barrier construct injection molded out of a third material over the one or more emitter chamber covers and the one or more detector chamber covers. The third material may be opaque and can comprise glass and an optically absorbing pigment. Some implementations include a circuit board, emitter(s) mounted to the circuit board and arranged within the emitter chamber cover(s), and detector(s) mounted to the circuit board and arranged within the detector chamber cover(s). The circuit board, emitter(s), detector(s), emitter chamber cover(s), and detector chamber cover(s) can form part of a sensor assembly connected to a housing of the wearable health monitoring devices.

Various wearable health monitoring devices are described herein. Some implementations include a housing including a front side and a back side configured to face tissue of the wearer when the device is worn; and a sensor assembly positioned by the back side of the housing. The sensor assembly can include emitters and detectors positioned on a surface of a substrate and a frame positioned adjacent to the surface of the substrate and configured to inhibit transmission of optical radiation through the frame. The frame can comprise an emitter chamber housing the emitters; and one or more detector chambers housing the one or more detectors.

A chip package includes a housing, one or more electrical connections coupled to an exterior of the housing, a photonic integrated circuit, and a scanning unit. Both the photonic integrated circuit and the scanning unit are disposed within the housing. The photonic integrated circuit has at least one waveguide designed to guide a beam of light. The scanning unit is designed to laterally scan the beam of light across a focal plane outside of the housing. The scanning unit is aligned with the photonic integrated circuit such that the beam of light is coupled between the photonic integrated circuit and the scanning unit.

An optical physiological sensor configured to be secured to a user's nose includes a first prong configured to be positioned proximate an outside portion of the nose, a second prong configured to be positioned proximate an inside portion of the user's nose, a winged portion coupled to the first prong and configured to contact tissue of the user, one or more emitters configured to emit light of one or more wavelengths into the tissue, and one or more detectors configured to detect at least a portion of the light emitted from the one or more emitters after attenuation through at least a portion of the tissue. In some configurations, the winged portion comprises a width that is greater than a width of the second prong. In some configurations, at least a portion of the winged portion is curved toward the second prong.

An electronic interface device is configured for use with associated optics for employing coded light for illuminating a liquid, gaseous, or other analyte or target, such as for measuring or determining a composition or other property of the analyte or target. The arrangement can help enable a far higher level of performance, such as for spectral analysis, imaging, or both. A shared common clock on both the illumination and receive sides of the system can be included, such as together with one or more of reference detection, per-channel wavelength-dependent modulation, multiple concurrent feedback loops at different levels, orthogonal and circulant codes, phase-scrambling to better utilize ADC dynamic range, oversampling, and other signal processing can be provided.

A medical device system includes a stylet with an optical fiber and a console operatively coupled to the stylet. The optical fiber can include an electrically conductive concentric tube configured to transmit electrical signals and a plurality of core fibers within the concentric tube. Each of the plurality of core fibers can include a plurality of sensors, and each the plurality of sensors can be configured to reflect a light signal of a different spectral width based on received incident light and change a characteristic of the reflected light signal based on a condition experienced by the stylet. The console includes one or more processors and a non-transitory computer-readable medium with logic that causes operations including providing an incident light signal to the optical fiber and receiving reflected light signals of different spectral widths of the received incident light by the plurality of sensors.

Medical systems, devices, and methods for determining whether a blood vessel is a vein or an artery. The system includes an optical fiber configured for insertion into a blood vessel coupled with a console having a light source, an optical receiver, processors, and logic stored in memory. The optical fiber includes sensors disposed along its length configured to determine a state or condition of the optical fiber. The state or condition can include a strain, movement, pressure, and / or temperature. The logic is configured to analyze reflected signals from the sensors to determine whether the optical fiber is inserted within an artery or within a vein. The logic may also determine a red-blue shift of a projected light to determine a blood flow direction with respect to the optical fiber.

The embodiment of the invention provides a detection module and wearable equipment. The detection module comprises a cover plate, a coherent light source and an image sensor, the cover plate is used for being arranged on the side wall of a shell of the wearable equipment, the cover plate is provided with an outer surface and an inner surface opposite to the outer surface, and the outer surface is exposed out of the side wall; the cover plate is provided with a first light-transmitting area and a second light-transmitting area; the coherent light source is arranged on one side of the inner surface of the cover plate and used for emitting coherent light penetrating through the first light-transmitting area. The image sensor is arranged on one side of the inner surface of the cover plate, and the image sensor is used for imaging the light penetrating through the second light-transmitting area. According to the embodiment of the invention, more functions can be integrated in a small-size product, namely the wearable equipment.

The present disclosure provides systems and methods for monitoring an analyte present in a biological sample of a subject by using: a piercing element coupled to a support, the piercing element configured to pierce a body surface of the subject; an analyte binding probe on or inside the piercing element to provide a change in an optical signal upon contact with an analyte in a biological sample of the subject; and a detector configured to detect the light signal.

Embodiments herein relate to an optical chemical sensor system that is wearable and includes a microneedle array. In one embodiment, the invention includes a chemical sensing device having a set of microneedles and sensor elements. The sensor element may include a first low refractive index gel layer, a second low refractive index gel layer, and a chromogenic ionophore sensing film disposed between the first low refractive index gel layer and the second low refractive index gel layer. In one embodiment, a retardation layer may be disposed between the sensor element and a set of microneedles. An optical emitter may be configured to emit light into the sensor element. An optical detector may be configured to receive light from the sensor element. Other embodiments are also included herein.

A biometric wearable device (e.g. finger ring or smart watch) has optical sensors to measure body oxygenation level, hydration level, glucose level, heart rate, heart rate variability, and / or blood pressure. Light from light emitters is transmitted through body tissue and changes in the light are analyzed. The angles and / or vectors along which the light is transmitted through body tissue can be automatically changed by the device in order to scan different tissue regions and / or different tissue depths.

An imaging system is provided comprising an imaging probe and at least one delivery device. The imaging probe comprises an elongate shaft, a rotatable optical core and an optical assembly. The elongate shaft comprises a proximal end, a distal portion, and a lumen extending between the proximal end and the distal portion. The rotatable optical core is positioned within the lumen of the elongate shaft and comprises a proximal end and a distal end. The rotatable optical core is configured to optically and mechanically connect with an interface unit. The optical assembly is positioned in the elongate shaft distal portion and proximate the rotatable optical core distal end. The optical assembly is configured to direct light to tissue and collect reflected light from the tissue. The imaging probe is constructed and arranged to collect image data from a patient site. The at least one delivery device is constructed and arranged to slidingly engage the imaging probe. Methods of introducing the imaging probe and the at least one delivery catheter into a patient are also provided.

Medical-device visualization systems and methods utilize patient-based reference framing to improve shape sensing for elongate medical devices. A medical-device visualization system includes, in some embodiments, a stylet, patient-wearable sensors, and a console. The stylet includes an optical fiber and a field generator. Each of the patient-wearable sensors senses a field generated by the field generator. The console instantiates medical-device visualization processes for visualizing the elongate medical devices by way of at least the stylet. The medical-device visualization processes include a shape-sensing process, a registration process, and a reference-framing process. The shape-sensing process determines a shape of the stylet in real-time from reflected optical signals from the optical fiber. The registration process registers the distal tip of the stylet in real-time at each sensor of the patient-wearable sensors. And the reference-framing process places the stylet with its shape in a patient-based reference frame established by the patient-wearable sensors.

An apparatus for monitoring an oxygen saturation level of a wearer of the apparatus includes a processor, a memory operably coupled to the processor, a first housing portion, a second housing portion, and a connection member. The first housing portion includes at least one light-emitting diode (LED), and the second housing portion includes a photodetector. The connection member is mechanically coupled to each of the first housing portion and the second housing portion. The apparatus is sized and shaped to be worn about a portion of an ear of a wearer of the apparatus. During operation, the at least one LED emits light in a direction toward the photodetector. A portion of the emitted light passes through the portion of the ear prior to arriving at the photodetector. The photodetector detects a signal in response to the portion of the emitted light, and the memory stores instructions to cause the processor to calculate an oxygen saturation level of the wearer based on the detected signal.

A method for calculating an IPA of an intravascular OCT image, relating to the technical field of medical instruments, the method including: acquiring an intravascular OCT image (S101); determining a calcified plaque region of the intravascular OCT image (S102); determining a light attenuation coefficient of the intravascular OCT image, where the light attenuation coefficient of the intravascular OCT image does not include a light attenuation coefficient of the calcified plaque region (S103); and determining an IPA of the intravascular OCT image according to the light attenuation coefficient of the intravascular OCT image (S104). The above method can increase accuracy of an IPA.

The invention discloses a method and a related device for monitoring home rehabilitation of a patient after a cerebral apoplexy interventional operation, and the method comprises the steps: obtaining a flexible pressure sensor, an optical sensor and a three-axis acceleration sensor which are integrated on a wearable device of the patient; the blood pressure feature, the blood glucose feature and the motion feature of the patient are collected in real time and input into the stroke postoperative rehabilitation risk model, the rehabilitation risk level of the patient is obtained, and the rehabilitation risk level comprises a low risk, a medium risk and a high risk; inputting the blood pressure characteristics, the blood glucose characteristics, the motion characteristics and the rehabilitation risk levels into a stroke postoperative rehabilitation suggestion model to generate a personalized rehabilitation suggestion scheme; the blood pressure features, the blood glucose features, the motion features, the rehabilitation risk levels and the personalized rehabilitation suggestion schemes are synchronized to a cloud server, so that a doctor can remotely monitor the rehabilitation condition of the patient. Personalized rehabilitation suggestions are provided by monitoring the physiological and motion data of the patient in real time, and remote monitoring and management of the rehabilitation process of the patient are achieved.

Methods, systems, and devices for operating a wearable device are described. A wearable device may include an optoelectronic-transmitter configured to output an optical signal with a narrow angular spread. The optoelectronic-transmitter may be at least partially covered with a material protrusion that has at least one dimension based on the angular spread. The wearable device may include an aperture within an inner surface of a housing of the wearable device. The aperture may be configured to enable propagation of the optical signal through the housing, and a width of the aperture may be based on the angular spread such that the aperture permits propagation of the optical signal within the angular spread. An optoelectronic-detector configured to receive the optical signal may be disposed at a distance from the optoelectronic-transmitter that is based on the angular spread.

An electronic interface device is configured for use with associated optics for employing coded light for illuminating a liquid, gaseous, or other analyte or target, such as for measuring or determining a composition or other property of the analyte or target. The arrangement can help enable a far higher level of performance, such as for spectral analysis, imaging, or both. A shared common clock on both the illumination and receive sides of the system can be included, such as together with one or more of reference detection, per-channel wavelength-dependent modulation, multiple concurrent feedback loops at different levels, orthogonal and circulant codes, phase-scrambling to better utilize ADC dynamic range, oversampling, and other signal processing can be provided. Modulation codes can optionally employ a clock divider, such as which can be configured to satisfy one or more specified constraints.

A non-invasive diagnostic system assesses the optimal timing for aortic valve replacement (AVR) by quantifying left-ventricular Frank-Starling reserve before irreversible myocardial damage occurs. The system (i) acquires left-ventricular ejection time (LVET) and other systolic-time intervals from optical or vibrational sensors positioned on the patient, (ii) induces a reversible preload change—e.g., passive leg raise or posture transition—to create a controlled venous-return increment, (iii) processes the paired baseline and post-maneuver waveforms to extract systolic time interval metrics, and (iv) analyzes the ΔLVET / Δpreload relationship against historical or population references. A diminished LVET response signals loss of contractile reserve, enabling timely AVR while myocardial changes remain reversible. The platform integrates measurement hardware, a data-processing engine, a data-analysis module, and a reporting interface, and may be configured as a wrist, ring, chest, or ear sensor. The method can be implemented at point-of-care without operator-dependent imaging or invasive monitoring.

The present invention relates to a non-invasive cardiac monitoring device that records cardiac data to infer physiological characteristics of a human, such as cardiac arrhythmias or other vital signs. Some examples of the invention allow for long-term monitoring of physiological signals. Further examples allow for processing of ECG and PPG data to calculate pulse arrival time. Some examples include a wearable cardiac monitor device on a chest that includes both the ECG and PPG sensor for long-term adhesion to a mammal for prolonged detection of cardiovascular signals.

Methods, systems, and devices for a wearable ring device are described. In some cases, a printed circuit board (PCB) of a wearable ring device may include a first wing extruding from the PCB in a first direction and in accordance with a first angle between a bottom face of the first wing and a top face of the PCB, and a second wing extruding from the PCB in a second direction and in accordance with a second angle between a bottom face of the second wing and the top face of the PCB. In such cases, a light emitting component may be positioned on the first wing and a light detecting component may be positioned on the second wing, such that a first optical path may be defined between the first light emitting component and the first light detecting component based on the first angle and the second angle.

An aspect of the disclosure provides a non-invasive intracranial pressure sensing apparatus comprising an interferometric near infrared spectroscopy, iNIRS system, the iNIRS system comprising: a light emitting arrangement comprising: a light source configured to emit light; a sample delivery channel coupled to the light source and arranged to be coupled to the subject's scalp to direct light from the light source towards the subject's brain tissue; and a reference channel coupled to the light source for receiving light therefrom; a light detecting arrangement configured to be coupled to the subject's scalp and the light emitting arrangement, the light detecting arrangement comprising an interferometric optical detector configured to receive: (i) reference light from the reference channel, and (ii) sample light from the subject's brain, the sample light comprising light emitted from the light source; wherein the optical detector is arranged to combine the sample light with the reference light to provide combined light signals comprising one or more components at a beat frequency between sample light and reference light; and wherein the sensing apparatus comprises a controller configured to process data indicative of the combined light signals to determine an indication of intracranial blood pressure for the subject based on at least one property of a pulsatile waveform of one or more identified pulses of blood flow through the subject's brain.

According to various embodiments, a sensing device for measuring oxygen concentration cycles in breath is disclosed. The sensing device includes a laser configured to emit light at an A-band of oxygen, a lens configured to collimate the light, and a multi-pass cell configured to contain a replaceable sample cell. The light passes through the multi-pass cell and is attenuated by oxygen in the sample cell. The sensing device further includes a photodetector configurated to convert the attenuated light into an electrical signal, and a lock-in amplifier or an equivalent processing circuit configured to determine oxygen concentration from the electrical signal.

An attachment for use with a device to scan a surface, for example a bony surface, the attachment comprising: a first housing portion configured to releasably secure a device comprising a camera, a second housing portion connected to the first housing portion and having a wall defining an internal region of the second housing portion and an external region of the second housing portion, and a plurality of pins slidably secured to the wall, each of the plurality of pins having a proximal end disposed in the internal region and a distal end disposed in the external region. Upon abutment of the distal end of each of the pins against a surface, the proximal end of each of the pins is configured to translate relative to the wall. When the device is secured to the first housing portion, the proximal ends of the plurality of pins are viewable by the camera.

Aspects relate to mechanisms to control the effective optical path length through skin tissue for non-invasive optical spectroscopy measurements. An apparatus can include a path length control part configured to control the effective optical path length of diffusely scattered light transmitted through skin tissue to produce a target effective optical path length. The apparatus may further include a spectral sensor, a detector, and a light source configured to produce input light directed towards the path length control part or the spectral sensor. The detector is configured to obtain a spectrum of an analyte under test based on the diffusely scattered light. The spectral sensor is configured to either receive the input light, produce modulated light based on the input light, and direct the modulated light to the skin tissue, or to receive the diffusely scattered light from the skin tissue and obtain the spectrum using the detector.

An illustrative optical measurement system may include a module comprising a light source configured to emit light directed at a target, a plurality of detectors configured to detect target photon arrival times of target photons of the light after the light is scattered by the target, and a reference detector configured to detect reference photon arrival times of reference photons of the light after the light is reflected within the module. The system may further include a controller configured to determine, based on an output from the reference detector, an instrument response function (IRF) of the module.

Methods and systems for determining changes in muscle activity patterns based on the optical response of subcutaneous human body structures are presented, along with methods and systems for controlling assistive robotic systems based on the measured muscle activity patterns. Elements of a muscle activity measurement system are mechanically coupled to a wearable structure that fits closely to a portion of the body of a human user. The muscle activity measurement system includes multiple emitters and detectors at different spacing along the skin surface. In some embodiments, the illumination intensity of each measurement channel, the programmable gain of each measurement channel, or both, are calibrated to maximize measurement sensitivity. In some embodiments, optical measurement data is employed to more accurately locate the muscle activity measurement system with respect to the human body. In some embodiments, a muscle activity measurement system tracks changes in muscle structure over time.

Systems and methods are disclosed for r monitoring a subject by coupling a wearable device with one or more noninvasive health sensors including an optical sensor and at least one electrical sensor to the subject, the optical sensor comprising one or more light emitting diodes at different wavelengths and one or more detectors; using the optical sensor, driving the one or more light emitting diodes at different wavelengths toward the skin of the subject and detecting the emergent light with the one or more detectors; calibrating data from the one or more noninvasive health sensors with clinical grade health data to track the subject's medical data during one or more subject activity conditions; capturing current additional subject data or current activity condition; and estimating the subject's current medical data with the one or more noninvasive health sensors and the current additional subject data or activity condition.

Methods, systems, and devices for optical signal measurement are described. A wearable electronic device may activate a first combination of optical sensors, the first combination of optical sensors including a set of transmitter sensors and a set of receiver sensors. In some cases, one or more optical sensor of the first combination of optical sensors may be positioned under a protrusion on an inner surface of the wearable electronic device. The device may measure, at the set of receiver sensors at a first time, one or more signals from the set of transmitter sensors, determine a signal quality metric associated with the one or more signals, and select a second combination of optical sensors for use at a second time based on the signal quality metric.