209 results about "Saturation level" patented technology

The invention relates to the technical field of image processing and biological signal detection, discloses a facial physiological detection method and system based on signal quality driven ROI selection, and aims to solve the problem of signal degradation of a traditional fixed geometric ROI in a complex scene. The method comprises the following steps: collecting a user face video stream through a camera and preprocessing the user face video stream; detecting a face bounding box and dividing the face bounding box into a plurality of sub-regions; calculating the signal-to-noise ratio, the periodic intensity and the motion artifact interference degree of each sub-region; screening an optimal sub-region according to a weighted fusion formula to generate a dynamic ROI mask; extracting a pure rPPG signal from the dynamic ROI mask coverage area; detrending and band-pass filtering are carried out on the rPPG signals, and physiological parameters such as the heart rate and the blood oxygen saturation degree are extracted. The system comprises a face video acquisition module, a face region positioning and segmentation module, a signal quality evaluation module, a dynamic ROI selection module, an rPPG signal extraction module and a physiological parameter estimation module. According to the technical scheme, signal degradation caused by local shielding, illumination abrupt change or attitude offset can be effectively avoided, the signal-to-noise ratio and the stability of the rPPG signal are remarkably improved, and the universality and the robustness of the method are enhanced.

The invention relates to a shale or coal rock gas evaluation method based on a gas-water two-phase flow isotope fractionation model. The shale or coal rock gas evaluation method comprises the following steps: 1, collecting data; 2, establishing a gas well model; 3, establishing a control equation set; 4, coupling the influence of the real gas effect and the effective stress; 5, establishing a gas transmission model and a relative permeability model; 6, establishing a relation between capillary pressure and saturation; 7, considering critical desorption pressure; 8, setting boundary conditions of initial conditions; 9, solving a control equation set; 10, calculating production dynamic parameters and isotope values; 11, performing history fitting; 12, verifying historical fitting quality; 13, predicting productivity; 14, calculating a gas dynamic output proportion; 15, identifying a fractionation inflection point and gas production mechanism conversion; by coupling gas-water two-phase flow, multiple gas transmission mechanisms, stress sensitivity and methane isotope competitive adsorption theories, yield prediction of the deep reservoir and quantitative evaluation of the dynamic proportion of produced gas are realized.

The invention relates to the technical field of breathing machine off-line evaluation, in particular to a breathing machine intelligent off-line evaluation system based on multiple parameters, which is characterized in that a data acquisition unit acquires breathing and physiological parameters of a patient in real time; the data analysis unit extracts a respiratory rate instantaneous value and a blood oxygen saturation continuous measurement value through preprocessing, inputs the respiratory rate instantaneous value and the blood oxygen saturation continuous measurement value into an intelligent analysis model composed of a deep residual network and a time convolution network, fuses a physiological hysteresis compensation coefficient to generate an offline index, and outputs a preliminary offline risk index; the data processing unit is embedded into a clinical rule base through a decision tree algorithm, generates a risk correction factor through a taboo check factor, allocates differentiation weights according to severity levels, corrects initial risk deviation and generates a comprehensive offline risk index, and the clinical rule base is continuously optimized through online learning, so that the offline risk assessment accuracy is improved; and a reliable basis is provided for clinical decision-making.

The invention relates to an oxygen supply device and an intelligent oxygen supply amount adjusting method, belongs to the technical field of medical equipment, and solves the problems of low resource utilization rate and poor individual comfort caused by extensive oxygen supply in the prior art. The oxygen supply device comprises a vibration sensor used for collecting weak vibration signals of a human body; the signal processing platform is used for extracting a respiration signal, a heart impact signal and related characteristics of the respiration signal and the heart impact signal in the human body weak vibration signals and calculating the blood oxygen saturation degree; regulating and controlling the oxygen supply amount and generating a corresponding regulation and control command by monitoring the change of the oxyhemoglobin saturation and the breathing signal; and the oxygen supply output device is used for adjusting the state of a valve to carry out oxygen supply output according to the regulation and control command of the signal processing platform. Through undisturbed non-intrusive real-time monitoring of vital signs, real-time intelligent adjustment of oxygen supply is achieved, the comfort of oxygen supply is improved, and energy consumption and resource waste are reduced.

An embodiment for determining a blood-oxygen level (e.g., SpO2) of a subject includes exposing a body portion of the subject to more than two wavelengths of electromagnetic energy, receiving a portion of the more than two wavelengths redirected by the body portion, converting the received portion of the redirected more-than-two wavelengths into signals each representing a respective group of at least one of the more than two wavelengths, and determining the blood-oxygen level (e.g., SpO2) of the subject in response to the signals. For example, such an embodiment can determine the blood-oxygen level of the subject with little or no skin-tone bias. That is, such an embodiment can determine the blood-oxygen level of the subject independently of the subject's skin tone, i.e., with little or no skin-tone-induced corruption of the determined blood-oxygen level.

Existing pulse oximeters have impaired accuracy in measuring blood oxygen levels (SpO2) in patients of color, where the presence of melanin in the skin tends to interfere with measurements of pulse oximetry, resulting in an overestimation of SpO2. Thus, the pulse oximeter often reports a higher oxygen saturation for patients with darker skin tones, often with increasing bias as the actual saturation (SaO2) decreases. This bias is further reinforced by calibration based on individuals with light skin pigmentation, which may lead to inequitable healthcare for patients of color. Our proposed solution is to modify current pulse oximetry calculations—which utilize the relative tissue absorbance of red and infrared light to estimate SpO2—to account for the concentration of melanin by additionally measuring the skin absorbance of UV˜A light. This derived concentration of melanin can then be used to modify the pulse oximetry algorithm output, thus estimating SpO2 more accurately for patients of color.

The invention belongs to the technical field of medical instruments, and discloses an oxygen saturation monitoring type integrated multi-module textile flexible urine controller which comprises an integrated flexible textile supporting body, a flexible textile skin-friendly layer, a urine control core component and an oxygen saturation measurer. The integrated flexible textile support body comprises a double-layer fabric unit A and a double-layer fabric unit B; the double-layer fabric unit A and the double-layer fabric unit B are respectively formed by selectively penetrating part of warp yarns through weft yarns by adopting a weaving process, and each of the double-layer fabric unit A and the double-layer fabric unit B consists of an upper-layer fabric and a lower-layer fabric; the flexible textile skin-friendly layer is made by adopting a non-woven spunlace process, and the flexible textile skin-friendly layer is fixed on the inner surface of the integrated flexible textile support body; the urine control core part is arranged between the upper-layer fabric and the lower-layer fabric of the double-layer fabric unit A; and the oxygen saturation measurer is arranged between the upper-layer fabric and the lower-layer fabric of the double-layer fabric unit B. By monitoring the oxygen saturation in real time, the pressure of a patient can be adjusted to proper pressure, and tissue necrosis is avoided.

The invention relates to a wirelessly usable sensor system, wherein the sensor system is suitable for being attached to the skin of a person and comprises the following components: (a) a measuring sensor which is suitable for measuring the oxygen saturation or the tissue perfusion of the skin covered by the sensor system and / or of the underlying tissue and outputting said oxygen saturation or tissue perfusion as a measured value; (b) an evaluation unit which is connected to the measuring sensor, is suitable for evaluating the measured value output by the measuring sensor, for comparing said measured value with a reference value and for outputting a signal if the measured value deviates from the reference value by a predetermined amount, and is suitable for learning the normal state of the tissue of a patient, for identifying patterns in the measured values measured by the measuring sensor by searching for repeating regularities in the sensor data and analyzing deviations from the determined normal state over a certain period of time, and for outputting a signal if the pattern deviates from a regularity; (c) a rechargeable energy store which supplies energy to the measuring sensor and to the evaluation unit and to further optional electronic components, and (d) a housing in which the components (a) to (c) and further optional electronic components are contained, wherein the housing is closed and impermeable to liquid such that the components (a) to (c) and further optional electronic components are protected from liquid. The sensor system is preferably used in medicine in decubitus prophylaxis.

This device for detecting oxygen saturation of percutaneous muscle comprises a light source for causing light to enter the body, and a first light detector and a second light detector for detecting reflected light reflected in the body. The second light detector is positionally shifted, in the circumferential direction about the light source, from a first imaginary line linking the light source and the first light detector.

The utility model provides a clamping type fixing device for an oxyhemoglobin saturation clip. The clamping type fixing device comprises an elastic band, a fixing buckle and a cable fixing piece. Wherein the elastic band is suitable for being worn on the wrist of a patient; the fixing buckle is fixedly connected with one end of the elastic band, and the other end of the elastic band can be wound around the fixing buckle so as to be fixed on the fixing buckle; the cable fixing piece is fixed or formed on the fixing buckle and used for fixing a transmission line of the blood oxygen saturation degree clamp. When the blood oxygen saturation degree is monitored, the elastic band is worn on the wrist of a patient, then the finger sleeve of the blood oxygen saturation degree clamp is sleeved on the finger, the monitor is worn behind the elastic band, and after the monitor is worn, the transmission line is fixed in the cable fixing piece. According to the clamping type fixing device for the oxyhemoglobin saturation clip, the transmission line is fixed into the cable fixing piece, the transmission line can be clamped and fixed, and therefore the fingerstall can be further fixed to the finger in an auxiliary mode, and monitoring failure caused by the fact that the fingerstall slips off when the oxyhemoglobin saturation is monitored is avoided.

This invention provides a pulse oximeter that offers high accuracy in measuring oxygen saturation and provides continuous data suitable for measuring the oxygen saturation decline index. [Solution] The pulse oximeter includes: a saturation measurement unit 21 that measures the blood oxygen saturation of a subject 9 from detection signals of a red light sensor 12 and an infrared light sensor 13 and converts them into a measurement data group 211; an abnormal value detection unit 22 that detects abnormal values ​​221 that appear in the measurement data group 211; a first data processing unit 23 that generates a first data group 233 by removing abnormal value intervals 232 that include the abnormal values ​​221 and adjacent time ranges 231 of a predetermined length; a second data processing unit 24 that generates a second data group 243 by removing low reliability intervals 242 in which the reliability index 241 calculated on the first data group 233 is lower than a predetermined threshold L; and a third data processing unit 25 that performs data interpolation processing on the second data group 243 to generate a third data group 252 of a predetermined time length.

A test platform for simulating patient conditions. In accordance with methods, systems, platforms and modules, the controller of a ventilator, may be tested. Where the ventilator manages automated mechanical ventilation controllers' maintenance of peripheral oxygen saturation (SpO2) for a simulated patient, an analogue blood oxygen output signal that is responsive to the fraction of inspired oxygen (FiO2) and the peak inspiratory pressure ventilator settings of the ventilator is tested by a test platform controller. Where the ventilator manages end-tidal carbon dioxide (EtCO2) of a simulated patient, operation of the test platform controlled by the platform controller of the test platform in providing carbon dioxide generation, lung compliance (CL) and airway resistance (RAW) states while providing an EtCO2 level that is responsive to changes in tidal volume and respiratory rate changes of the patient is tested.

An oxygen saturation measuring device determines a first light projection timing at which a first light emitting element projects red light and a second light projection timing at which a second light emitting element projects infrared light based on a peak timing and a bottom timing of a third pulse wave signal corresponding to a light intensity of received light of reference light having a wavelength at which an absorption coefficient of oxidized hemoglobin and an absorption coefficient of reduced hemoglobin are higher than those of the red light and the infrared light in one pulsation, causes the first light emitting element to project the red light at the first light projection timing, causes the second light emitting element to project the infrared light at the second light projection timing, and measures oxygen saturation of an artery based on a first pulse wave signal output from a light receiving element according to the red light projected at the first light projection timing and a second pulse wave signal output from the light receiving element according to the infrared light projected at the second light projection timing.

The application discloses a method for detecting the concentration of dissolved CO in fermentation liquor. The method comprises the following steps: (1) preparing CO saturated aqueous solution, oxygen-free aqueous solution, sodium hydrosulfite solution as a reference solution and deoxygenated myoglobin solution; (2) preparing an absorbance-CO saturation standard curve; (3) sampling and detection: taking a sample from the fermentation liquor as a sample to be detected by a sampling device, injecting the sample to be detected into a cuvette, adding 2.5 mL of deoxygenated myoglobin solution in the cuvette in advance and sealing the cuvette, adjusting zero with the reference solution, detecting the absorbance of the cuvette containing the sample to be detected at a wavelength of 415-425 nm by a spectrophotometer, substituting the obtained absorbance into the absorbance-CO saturation standard curve obtained in step (2) to obtain the corresponding CO saturation, and then converting the CO saturation into the concentration of dissolved CO according to the known CO solubility. The detection method has the characteristics of taking and measuring immediately, rapidness and simplicity.

A device comprising interconnected components for deoxygenating blood used in the treatment and prevention of reperfusion injury, including a configuration to reduce the ionized calcium concentration of the deoxygenated blood to less than 0.5 mmol / L. The components may include a syringe pump operably communicating with various configurations via a control unit / processor, a cannula, a pump communicating with the cannula, a heat exchanger, a device for generating / creating fluid flow, an infusion port, a mixing port, a device hub, and a catheter hub. These components are selectively connected to a subject, and monitoring and / or other lead wires / devices may be attached to the subject. The lead wires / devices may include sensors and other devices that can be attached to / connected to the subject, providing health indicators, such as a temperature sensor, electrodes for monitoring cardiac electrical activity, and an oxygen saturation (SpO2) sensor for monitoring the patient's blood oxygen saturation.

A system includes: a dialysis system configured to provide a dialysis treatment for a patient; an optical monitoring system in communication with the dialysis system, wherein the optical monitoring system is configured to obtain measurements of the patient's hematocrit, oxygen saturation and / or blood volume change during the dialysis treatment, wherein the measurements are indicative of a double pool refill rate for the patient during the dialysis treatment; and a massaging system in communication with the dialysis system, wherein the massaging system is configured to provide massaging for the patient during the dialysis treatment, wherein providing massaging for the patient includes running a massage sequence taking into account the measurements obtained by the optical monitoring system.

Provided is a method and a system for noninvasive measurement of blood viscosity based on oxygen saturation and blood flow rate, which may easily and quickly calculate the blood viscosity by using the method and the system for noninvasive measurement of blood viscosity based on oxygen saturation and blood flow rate, thereby enabling immediate obtaining of the blood viscosity.

A ring pulse oximeter. The present invention relates to the technical field of medical devices. The ring pulse oximeter comprises a ring assembly. The ring assembly comprises an elastic ring and a sensor. The sensor is arranged in the ring and is configured for measuring blood oxygen saturation. The ring is provided with a ring cavity for finger insertion, and at least part of the inner circumferential surface of the ring is connected to an elastic bag body. The elastic bag body can generate different elastic depressions for fingers with different circumferences. A finger can be accurately positioned by means of the elastic bag body, so that the finger is positioned in a monitoring area, thereby improving measurement accuracy, reducing time consumption, and improving user experience.

A system configured to enclose a premature fetus within an extracorporeal environment to promote growth of the fetus and increase viability of the fetus. The system includes a device for measuring oxygen saturation.

This invention relates to the field of ventilator technology, and discloses a method, device, ventilator, and medium for managing mechanical ventilation in a ventilator. The method includes: acquiring mechanical ventilation parameters; determining that the ventilator is operating in a target ventilation mode based on the mechanical ventilation parameters, performing leak detection on the ventilator, and obtaining a leak detection result; when the leak detection result indicates that mechanical ventilation is normal, performing oxygenation management on the target subject, and obtaining an oxygenation management result; when the oxygenation management result indicates that blood oxygen saturation reaches a preset oxygenation threshold, performing pH testing on the target subject, and obtaining a pH testing result; when the pH testing result indicates that the pH is within a preset pH testing range, maintaining continuous operation of the ventilator in the target ventilation mode. This invention simplifies complex adjustment processes through algorithmic control, reduces repetitive work, lowers the professional requirements for operators, and thus improves adjustment efficiency.

The invention relates to the technical field of hemodialysis monitoring, and provides a blood oxygen saturation monitoring method and device for a hemodialysis pipeline based on double optical paths, and the blood oxygen saturation monitoring method comprises the following steps: S1, obtaining the transmitted light intensity I1 red light of red light penetrating through a narrow-diameter section of the hemodialysis pipeline and the transmitted light intensity I1 infrared light of infrared light penetrating through the hemodialysis pipeline; s2, acquiring transmitted light intensity I2 red light of the red light penetrating through the wide-diameter section of the hemodialysis pipeline and transmitted light intensity I2 infrared light of the infrared light penetrating through the hemodialysis pipeline; s3, a data buffer area is constructed, N recent light intensity sampling values are stored in the data buffer area, the arithmetic average value of data in a data set is calculated, and representative narrow-diameter section red light transmission light intensity I1 red light avg (t), narrow-diameter section infrared light transmission light intensity I1 infrared avg (t), wide-diameter section red light transmission light intensity I2 red light avg (t) and wide-diameter section red light transmission light intensity I1 infrared avg (t) at the moment t are obtained; and the oxyhemoglobin saturation SpO2 is calculated. The device has the advantages that in-vitro blood oxygen saturation monitoring is achieved, and accuracy is improved.

An electronic device is provided. The electronic device includes a communication module, a display, a memory, a biosensor configured to measure oxygen saturation, and at least one processor. The at least one processor may be configured to obtain electronic medical record (EMR) data from an external server through the communication module, identify oxygen saturation-related medical records based on the EMR data, based on occurrence of an event, determine a specified oxygen saturation measurement period and a specified reference oxygen saturation range based on the oxygen saturation-related medical records, measure oxygen saturation based on the specified oxygen saturation measurement period by using the biosensor, identify whether the measured oxygen saturation satisfies the specified reference oxygen saturation range, and display the measured oxygen saturation and information indicating whether the measured oxygen saturation satisfies the specified reference oxygen saturation range on the display.

1. Name of the product in this design: Electrocardiogram (ECG) Monitor. 2. Purpose of this design: To monitor, record and display vital signs parameters of patients such as heart rate, blood oxygen saturation, blood pressure, and respiration. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

This application relates to a contactless atrial fibrillation identification and multi-physiological indicator monitoring system and method based on deep learning. The system includes: extracting pulse wave signals from a user's facial video; extracting facial temporal feature sequences from the user's facial video; assigning attention weights to the pulse wave signals and the facial temporal feature sequences and performing weighted processing; and predicting the probability of atrial fibrillation, heart rate zone, blood oxygen saturation level, and blood pressure level based on the weighted pulse wave signals and facial temporal features. This solution can effectively improve the robustness and accuracy of atrial fibrillation detection, while simultaneously monitoring multiple physiological indicators of the user.

The invention relates to a method for determining a substance concentration in a sample comprising a liquid containing particles, in particular oxygen saturation, comprising the following steps: - Obtaining a first perfusion index based on a reflected first component of an incident first light ray with a first wavelength; - Obtaining a second perfusion index based on a reflected second component of an incident second light beam with a second wavelength; - Receiving a reflected third component of an incident third light ray with a third wavelength, wherein the third light ray is in a wavelength range that is less sensitive to oxygen saturation than the first and second light rays; - Adjust at least one of the perfusion indices in response to the third component received; - Determining the oxygen saturation or a change thereof from at least one adjusted perfusion index and the respective other perfusion index.

The invention discloses a dissolved oxygen sensor calibration method, which comprises the following steps: at each set temperature, detecting through a to-be-calibrated dissolved oxygen sensor to obtain a sampling temperature value, and detecting through a standard temperature sensor to obtain a standard temperature value; performing linear regression fitting by using the recorded sampling temperature value and the standard temperature value, establishing a temperature correction function of the to-be-calibrated dissolved oxygen sensor, and obtaining a corrected temperature value; adjusting the saturation degree of dissolved oxygen in the water body at each set temperature, and recording phase values detected by the uncalibrated dissolved oxygen sensor and dissolved oxygen content values obtained by the calibrated dissolved oxygen sensor under different saturation degrees; performing linear regression fitting by using the phase value and the dissolved oxygen content value, establishing a linear fitting function of the dissolved oxygen content value and the phase value, and screening data records according to a fitting index R2; and carrying out dissolved oxygen sensor calibration function curved surface fitting by utilizing the reserved data record to generate a calibration formula so as to realize calibration of the dissolved oxygen sensor.

The present invention relates to design improvements to reflective and transmissive photoplethysmography (PPG) devices to reduce motion artifacts, avoid false and non-physiological baseline drift in the signal, and improve signal quality and the accuracy of various indicators derived from the PPG. The invention can improve the accuracy of all PPG driven parameter estimations, such as continuous measurements of oxyhemoglobin saturation (SpO2), heart rate, heart rate variability, respiratory rate, blood pressure, and arterial pulse wave volume (i.e., peripheral arterial tension measurements and arterial pulse tension measurements). The invention also incorporates the ability to measure and / or track and / or compensate for the variation or absolute value of the applied pressure between the sensor and the surface of the biological subject, which is applicable to all sensors or associated probes.

A wearable, skin adhesive blood gas monitoring device detects both oxygen and carbon dioxide for accommodating a potential inaccuracy in an oxygen level resulting from excessive carbon dioxide. Photoluminescent films in conjunction with a compact form-factor circuit provide a wearable and unobtrusive device that adheres directly to the epidermal surface for computation of blood gas levels based on transcutaneous and reflective properties of the blood gases. A wireless medium such as Bluetooth® enables communication to a standalone or portable device such as a smartphone or similar personal device having an application (app) for receiving the computed signals. Conditions such as hypercarbia, which tend to result in higher levels of carbaminohemoglobin, or hemoglobin bound to CO2 instead of oxygen, tend to compromise computed oxygen levels by interpreting the CO2-bound hemoglobin as oxygenated blood.

The application discloses a kind of shallow shale gas preservation condition microcosmic evaluation method, the method obtains blocky rock sample from study target layer, and carries out equal division, and is prepared into the sample of different water saturation;Through the results of several groups of different temperature and saturation conditions under the methane high-pressure adsorption experiment, and interpolation, the methane theoretical maximum adsorption amount under the condition of any formation temperature, water saturation and pressure can be obtained.Then compare with the gas content of present target layer, finally evaluate the preservation condition of the target reservoir on site.The application has a positive effect on shale gas production planning and reservoir evaluation.

A method for measuring oxygen saturation includes determining a difference in voltage value for a light emitting diode based on a first voltage at the light emitting diode for a first current and a second voltage at the light emitting diode for a second current and determining a temperature for the light emitting diode based on the difference in voltage value. The method further includes determining an intensity of a received photonic signal corresponding to an output photonic signal output using the light emitting diode and determining an oxygen saturation level based on the intensity of the received photonic signal and the temperature for the light emitting diode. The method further includes outputting an indication of the oxygen saturation level.