9 results about "Plethysmograph" patented technology

The invention discloses a non-inductive physical and psychological health monitoring and early warning system and method before a coal miner goes down a well, and belongs to the technical field of coal mine safety production and personnel health monitoring. A physiological monitoring unit comprises a millimeter-wave radar, an infrared camera and an imaging type photoplethysmography device, the millimeter-wave radar is installed in the center of the top of a monitoring channel, and the infrared camera is installed on the imaging type photoplethysmography device; the infrared cameras are symmetrically installed on the two sides of the channel, the imaging type photoplethysmography devices are integrated in the infrared cameras and used for synchronously collecting the core body temperature and the oxyhemoglobin saturation, and the integrated imaging type photoplethysmography devices focus on the forehead and cheek areas through the RGB channel. Reflected light intensity fluctuation signals caused by blood vessel blood volume changes are collected. Through cooperation of the three devices, non-contact synchronous collection of multiple parameters can be completed without deliberate cooperation of workers, comprehensive and continuous basic data are provided for subsequent physical and psychological health analysis, the wellhead passing efficiency is improved, and the cross infection risk of contact type devices is avoided.

Systems and methods for synthetic generation of face videos are described. An embodiment includes receiving an input image; encoding the input image into a UV albedo map, a 3D mesh, an illumination model LSH, and a camera model c; decomposing the UV albedo map into a UV physiological map; varying the UV physiological map according to a target Remote Photoplethysmography (rPPG) signal; generating a plurality of modified PPG UV maps; combining at least one modified PPG UV map with the illumination model LSH, camera model c to render final frames with randomized motion; and generating a synthetic rPPG video using the final frames with randomized motion.

Systems and methods are described for assessing arterial blood oxygen saturation concurrently with performing continuous blood pressure monitoring via a volume clip approach. Generally, the cuff system may be configured to fit to a body appendage. The cuff system may include a pressurizable balloon and a photoplethysmograph. The method may perform arterial blood oxygen saturation when the artery of the body appendage is in an unloaded state. Small fluctuations in the plethysmogram signal may be used with the calculated calibration factor to calculate arterial blood oxygen saturation.

A foam cutout configured for polygraph equipment comprises a case body foam insert and a case lid foam insert. The case body foam insert is configured to occupy the volume of a hard-shelled case body, and the case lid foam insert is configured to occupy the volume of a hard-shelled case lid. A plurality of cutouts are provided within the case body foam insert and the case lid foam insert. The cutouts are configured to contain pieces of equipment that are required or recommended for use by polygraph examiners. The best embodiment includes cutouts configured to contain a Data Acquisition Subsystem and its cable, a blood pressure cuff and its hose, electrodermal sensors, pneumographic tubes, and a seat pad sensor. Alternative embodiments include receptacles configured to contain plethysmographs, a blood pressure gauge, arm and foot sensor pads, and a hidden transceiver.

A device, method, and system for measuring vasculature hemodynamics are disclosed. The device includes a pressurizing member that applies force to a tested body region to stop blood flow to the tested body region for a predetermined duration, data acquisition means comprising a plethysmograph configured to measure and receive one or more signals associated with one or more hemodynamic parameters in the tested body region, and a processor configured to analyze the one or more measured signals and provide an output of the hemodynamic parameters indicative of the hemodynamic status of the subject.

A method, apparatus, medium, product, and volume plethysmometer (1000) for determining a time constant are disclosed. The method includes: acquiring the leakage time of a leaking module at a preset opening degree, wherein the leakage time is the time when the leaking module releases gas from a target chamber at the preset opening degree, causing the gas pressure in the target chamber to reach a preset gas pressure threshold (S101); determining that the leakage time reaches a preset time interval; and determining the time constant of the target chamber based on the leakage time (S102). By employing a leaking module with an adjustable opening degree and acquiring the leakage time of the leaking module, the time constant is automatically calibrated based on the leakage time reaching the corresponding time interval and the leakage time at the corresponding opening degree. The entire time constant calibration process requires no manual intervention, improving the efficiency and accuracy of time constant calibration.

The utility model discloses a plethysmography device with an electric shock function. The device comprises a breathing tank, a plethysmography module and an electric shock control module, wherein a breathing detection sensor is arranged on the wall of the breathing tank, and the breathing detection sensor is used for collecting breathing data of an experimental subject in the breathing tank and transmitting the breathing data to the plethysmography module; an electric shock electrode is arranged at the bottom of the breathing tank, and the electric shock control module is used for transmitting an electric shock control signal to the electric shock electrode. According to the technical scheme, respiratory function detection and electric shock stimulation can be completed in the same space in the breathing tank, researchers do not need to switch operation among different devices, the experiment operation process is simplified, the experiment operation time is shortened, the experiment efficiency is improved, meanwhile, the state change risk of an experiment object is reduced, and the experiment efficiency is improved. The data relevance and accuracy are improved, and the occupied space of equipment can be reduced.

Systems, methods, apparatuses, and medical devices for harmonizing data from a plurality of non-invasive sensors are described. A physiological parameter can be determined by harmonizing data between two or more different types of non-invasive physiological sensors interrogating the same or proximate measurement sites. Data from one or more first non-invasive sensors can be utilized to identify one or more variables that are useful in one or more calculations associated with data from one or more second non-invasive sensors. Data from one or more first non-invasive sensors can be utilized to calibrate one or more second non-invasive sensors. Non-invasive sensors can include, but are not limited to, an optical coherence tomography (OCT) sensor, a bio-impedance sensor, a tissue dielectric constant sensor, a plethysmograph sensor, or a Raman spectrometer.

A method for determining blood pressure is provided. The method may involve obtaining measured plethysmograph data and pressure data that corresponds to a time period comprising a first portion during which an external pressure perturbation was not applied and a second portion during which the external pressure perturbation was applied. The method may involve generating predicted plethysmograph data using: (i) initial blood pressure values; (ii) at least a subset of the measured plethysmograph data associated with the first portion during which the external pressure perturbation was not applied; and (iii) the pressure data. The method may involve modifying the initial blood pressure values based on a difference between the predicted plethysmograph data and the measured plethysmograph data to generate final blood pressure values.