43 results about "Respiratory measurements" patented technology

A method of operating a CPAP apparatus in which the interface pressure is controlled to rapidly drop at the start of expiration by an expiratory relief pressure (ERP) that is independent of instantaneous respiratory flow, following which the pressure rises to an inspiratory level at or shortly before the end of expiration, or at the onset of an expiratory pause, if any. The ERP is an increasing function of the inspiratory pressure. The expiratory pressure follows a template that is a function of the expected expiration time, the magnitude of the template being equal to the ERP. The current estimated proportion of expiration is determined by comparing the expiration time of the breath in progress to low-pass filtered expiratory durations measured for a number of the preceding breaths.

A wearable system configured to collect thermal measurements related to respiration. The system includes a frame configured to be worn on a user's head, and at least one non-contact thermal camera (e.g., thermopile or microbolometer based sensor). The thermal camera is small and lightweight, physically coupled to the frame, located close to the user's face, does not occlude any of the user's mouth and nostrils, and is configured to take thermal measurements of: a portion of the right side of the user's upper lip, a portion of the left side of the user's upper lip, and a portion of the user's mouth. The thermal measurements are forwarded to a computer that calculates breathing related parameters, such as breathing rate, an extent to which the breathing was done through the mouth, an extent to which the breathing was done through the nostrils, and ratio between exhaling and inhaling durations.

An improved sensor (102) for respiratory and metabolic monitoring in mobile devices, wearables, security, illumination, photography, and other devices and systems uses an optional phosphor-coated broadband white LED (103) to produce broadband light (114), which is then transmitted along with any ambient light to a target (125) such as the ear, face, or wrist of a living subject. Some of the scattered light returning from the target to detector (141) is passed through narrowband spectral filter set (155) to produce multiple detector regions, each sensitive to a different waveband wavelength range, and the detected light is spectrally analyzed to determine a measure of respiration of the subject, such as respiratory rate, volume, effort, depth, or respiratory variability. In one example, variations in components of the bloodstream over time such as hemoglobin and water are determined based on the detected light, and said measure of respiration is then determined based on the in components of the bloodstream over time, with venous compartment changes as a result of body movement and body position changes, and skin surface compartment changes as a result of sensor movement, substantially removed. In the absence of the LED light, the ambient light may be sufficient illumination for analysis. The same sensor can provide identifying features of type or status of a tissue target, such as heart rate or variability, hydration status, or even confirmation that the tissue is alive. Respiratory monitoring systems incorporating the sensor, as well as methods, are also disclosed.

The invention is a pollutant aerobic-biodegradation breathing measuring method and device, relating to a method and device for measuring oxygen utilization ratio in the course of processing waste water by aerobes. And the measuring method comprises the steps of: checking dissolved oxygen sensor, keeping temperature of water tank constant, putting in microbial mixed solution, blending, circulating mixed solution, setting parameters, putting in to-be-measured sample and calculating; and the measuring device comprises water tank, magnetic blending mechanism, aeration mechanism, aeration chamber, breathing chamber, measuring chamber, pH sensor, dissolved oxygen sensor, signal transmit lines, transducer terminal box, computer and oxygen utilization ratio measuring software. And the invention has advantages of less interference, high testing accuracy and frequency, high instrument automation degree, etc. and it is applied to the aspects of city sewage composition characterization, inlet water toxicity detection, evaluation and early- warning in sewage factory, process control and operation management in sewage factory, etc.

A method of an apparatus control pressure in the patient interface. A vent valve may be used with a respiratory device, where the vent valve may selectively block fluid communication between components, such as the flow generator, the patient interface, and / or the vent. An expiratory flow model may be used to determine an expiratory characteristic such as an expiratory flow rate or pressure in the patient interface where an indicative measure may not be available. The expiratory flow model may receive inputs based on a measure of the patient's respiration, such as the tidal volume, peak inspiratory flow rate or length of inspiration. The expiratory characteristic may be used by a controller to control a pressure in the patient interface to provide respiratory therapy to a patient at or close to a target pressure.

An apparatus comprises a flow sensor configured to sense airflow between a respiration machine and a patient, a first connector configured to communicate air between the flow sensor and the patient, a second connector configured to communicate air between the flow sensor and the respiration machine, multiple pressure sensing ports configured for connection to pressure sensing tubes and configured to communicate gas pressure between the flow sensor and a pressure flowmeter, and a filter integrated with the flow sensor between the first connector and the pressure sensing ports and configured to communicate gas pressure therethrough while preventing contaminants from passing from the flow sensor to the pressure sensing tubes.

The invention is directed method for measuring respiration using impedance pneumography over a duration of at least several minutes, several hours or over the duration of night sleep, the method comprising: using at least one electrode (11) configured to be in contact with an arm (2) of a human body (1) and at least one electrode (22) configured to be in skin contact with the thorax of a human body (1); defining impedance signal changes which relate to the respiratory volume changes or time-differentiated impedance signal changes which relate to the respiratory flow; and analysing variation over time in flow-time, volume-time, flow-volume curves, or derived numerical indices, or plain respiratory impedance signal or its time derivate over the duration of at least several minutes, several hours or over the duration of night sleep.

A system and method of real-time monitoring of medical patient information, both within a medical facility, as well as during in home care. The system and method can include collection of substantial amounts of longitudinal data used to make deductions in trends across a single patients care, care across multiple patients within a facility, and quality of care across given practitioners. The system and method can also include providing information and feedback regarding a patient's perceived quality of care within a facility, as normalized to a given patient's prior experiences. The system and method can also include providing interactive feedback stimuli and patient care experiences to the patient, as well as real time care monitoring systems for practitioners. In embodiments, the present invention can be a system for holistic pain monitoring and prediction, a system for prevention of narcotic diversion, or a magnetometer sensor system for respiratory measurement.

The invention provides a respiration measurement method based on a camera and a spherical marker. The spherical marker attaches to the chest and abdomen of the human body, the images of the marker are collected by adopting the camera, the distance change between the marker and the camera can cause the change of the imaging size of the marker in the camera, by extracting the contour radius of the imaging region of the marker and recording the size change of the contour radius of the region in the continuous images, the respiration movement of the human body can be reflected, the respiration movement mode of the human body can be tracked, and the respiration frequency can be calculated. According to the respiration measurement method provided by the invention, the tracking on the respiration mode and the calculation for the respiration frequency are realized through the simple spherical marker and the camera, so that the connection of the expensive sensor and the discomfort caused to the human body are avoided, in addition, the complex tracking and calculating algorithm in other image measurement respiration algorithms are also avoided, and the respiration measurement method is beneficial for the measurement for the respiratory frequency and the tracking for the respiration mode in daily life.

The invention discloses a PPG-based non-contact non-invasive heart rate and respiration measuring method. The method comprises the following steps: step 1, image acquisition; step 2, region of interest ROI acquisition; step 3, ICA and consistency analysis; step 4, change signal acquisition; step 5, Gaussian filtering processing and multi-scale analysis; and step 6, fast Fourier transform. According to the method, a novel time domain heart rate and respiratory value signal extraction scheme based on a histogram statistics thought is used, noise information contained in obtained time domain signals is reduced, and the accuracy of heart rate detection is enhanced; a Gaussian filtering denoising method is innovatively used, so that the robustness of the system is greatly improved; Overlays isconstructed for an algorithm with a large calculation amount, and hardware acceleration is carried out at a PL end; and the PS end utilizes a time overlapping method to improve algorithm parallelism,realizes portability of hardware of the low-performance FPGA, and meets the requirements of real-time heart rate and respiratory value calculation on high frame number of a video.

A respiratory measurement system and a method for measuring respiratory motion are provided. The system includes a strapping device that is configured to be placed across a chest of a person. The strapping device is substantially transparent to x-rays. The system further includes a sensor operatively coupled to the strapping device generating a measurement signal indicative of a displacement of the strapping device during respiration by the person.

An electro-pneumatic assembly for use in a respiratory measurement system that includes a housing having a plurality of channels defined therein and a plurality of walls forming a cavity. The housing includes an upper face, a lower face, and a plurality of apertures defined in the lower face of the housing to. A cover is affixed to the upper face of the housing to enclose the cavity thereby forming a chamber, and to enclose the channels thereby forming a plurality of conduits. A control component is operatively coupled to at least one aperture in the plurality of apertures, and a measurement component is operatively coupled to at least one aperture in the plurality of apertures. This assembly provides a simple, robust component for managing the pneumatics of the respiratory measurement system.

In a method for acquisition of a measurement data set of a respirating examination subject by magnetic resonance technology, the measurement data set is acquired by numerous individual measurements, wherein, for each individual measurement, a respiratory position and a respiratory phase are determined, based on which it is decided whether the individual measurement is to be included in the final measurement data set from which an image data set is reconstructed.

The invention discloses an intelligent respiratory training implementation system, which comprises a sharing module, a mode creation module, an intensity adjustment module, an evaluation module, a display module and a voice prompt module on a mobile terminal APP, wherein the the mode creation module facilitates a user to create a respiratory training mode, the sharing module is used for sharing, communicating and guiding a training mode and a training result between a doctor and a patient, the intensity adjusting module is used for adjusting respiratory intensity and respiratory cycle, the evaluation module generates a corresponding lung function standard prediction value according to body indexes of the user, compares an actual respiratory measurement value of the user with a standard value, and generates an evaluation report, the display module displays the target respiratory intensity and the actual respiratory intensity of the user through multiple states, the user is guided to adjust the respiratory training intensity, and the user is reminded of all the steps of the respiratory training process through the voice prompt module. The system solves the problems that an existing respiratory training system cannot form standard guidance, and users cannot interact with one another.

The invention relates to the technical field of signal processing. The invention aims to provide a multi-target heart rate and breath measuring method and system matched with different radar bandwidths. Therefore, accurate non-contact measurement of heart rates and breath of a plurality of target human bodies is realized. According to the technical scheme, the method comprises the following stepsof: transmitting an electromagnetic wave signal to a to-be-measured space through a radar transmitter configured as a first bandwidth, and processing a received first echo signal reflected by each target human body to obtain position information of each target human body in the to-be-measured space; configuring a radar transmitter as a second bandwidth, and performing radar beam forming accordingto the position direction of each target human body in the to-be-measured space; processing second echo signals to obtain an echo sequence of each target human body; and obtaining breath characteristic signals and heart rate characteristic signals from the echo sequence, and performing noise reduction and fast Fourier transform on the two types of characteristic signals to restore breath and heartbeat motion information. According to the invention, the accuracy of breath and heartbeat measurement is improved.

The invention discloses a respiration measurement method applied to a mobile terminal. The respiration measurement method comprises the following steps: acquiring respiration parameters of a target object; and outputting a first visualization signal corresponding to the respiration parameters of the target object on a screen. The invention further discloses a respiration measurement device, the mobile terminal and a storage medium. The respiration measurement device has the advantages of convenience in use and sanitation, and intuitive degrees of respiration training and respiration measurement processes can be increased; and meanwhile, existing structures and circuits of existing equipment are adequately utilized, so that the cost is lowered.

The invention provides a PPG signal based respiratory rate measurement method and device. The method includes the following steps: collecting PPG signals in real time; performing first processing on the PPG signals so as to obtain a first processing signal, wherein the first processing includes filtering and differential processing; performing second processing on the first processing signal so asto obtain an upper envelope; and calculating final respiratory rate according to the upper envelope. In addition, a PPG signal based respiratory rate measurement device is also provided. Through theprovided measurement method and device, the measurement of the respiratory rate can be realized through the PPG based signals; and compared with existing respiratory rate measurement methods, the measurement method and device are small in influences from the outside, wide in application scenario, simple in operation, easy to carrying and faster in measurement.

In order to solve the problems that when an existing non-contact type three-dimensional measurement system is applied and respiratory monitoring is carried out, the resolution ratio and the frame rate are difficult to consider at the same time, and wearing is tedious, the invention discloses an infrared dynamic high-resolution non-contact type respiratory measurement system. The infrared structured light and a multi-frame super-resolution algorithm are utilized to perform high-precision three-dimensional reconstruction on the chest and abdomen in a non-contact manner under the condition of ensuring a certain frame rate, and the key point recognition algorithm is utilized to automatically recognize the left and right chest and abdomen wall boundaries of the human body, so that the respiration conditions of the left and right lungs and the whole lung can be simultaneously analyzed, and the whole measurement process is simple and efficient.

The invention relates to the technical field of medical equipment, in particular to a human health information detection and evaluation system and an operation method thereof. The system comprises: apower supply module for supplying power to other modules; an electrocardiographic respiration measuring module used for detecting an electrocardio signal and a respiratory signal; a pulse measuring module used for measuring pulse and heart rate; a body temperature measuring module used for measuring body temperature data; a blood pressure measuring module used for measuring blood pressure data; amotion module used for detecting a human motion state; a data communication module used for realizing data transmission among the electrocardiographic respiration measuring module, the pulse measuringmodule, the body temperature measuring module, the blood pressure measuring module, the motion module and a micro-processing unit; and the micro-processing unit used for processing and operating thereceived data by adopting a filtering data characteristic value extraction algorithm. According to the invention, real-time health monitoring of cardiovascular patients can be realized, and health early warning can be carried out in advance.

A (8, 6, 10, 12, 14) metabolic rate measuring apparatus comprising means to measure a reference metabolic rate of a user from at least one breath of the user, means to measure metabolic rate from a subsequent breath of a user, means (14) to indicate a deviation from the reference rate in a breath and prevent measuring of subsequent breaths, and means (50) for a user to override the measurement prevention means to enable measurement of metabolic rate from breaths which deviate from the reference rate.

The invention is a pollutant aerobic-biodegradation breathing measuring method and device, relating to a method and device for measuring oxygen utilization ratio in the course of processing waste water by aerobes. And the measuring method comprises the steps of: checking dissolved oxygen sensor, keeping temperature of water tank constant, putting in microbial mixed solution, blending, circulating mixed solution, setting parameters, putting in to-be-measured sample and calculating; and the measuring device comprises water tank, magnetic blending mechanism, aeration mechanism, aeration chamber, breathing chamber, measuring chamber, pH sensor, dissolved oxygen sensor, signal transmit lines, transducer terminal box, computer and oxygen utilization ratio measuring software. And the invention has advantages of less interference, high testing accuracy and frequency, high instrument automation degree, etc. and it is applied to the aspects of city sewage composition characterization, inlet water toxicity detection, evaluation and early- warning in sewage factory, process control and operation management in sewage factory, etc.

Method for measuring respiratory vibration on a human or animal skin, including emitting an emission light at a first position on the skin and receiving a diffused light from the emission light at a second position on the skin; storing a vibration signal including a light intensity of the diffused light received over time; wherein the vibration signal corresponds to a mechanical vibration of the skin, and extracting a respiratory parameter from the vibration signal. In particular, at least one of the first position and the second position is in proximity to or at a trachea, a neck or a chest.The system for carrying out the method includes an emitter, a receiver, a circuit, and a processing unit. A set of a sensor module and a skin adhesive patch is also provided.

A respiration measurement device includes: a first body which has an air flow path formed therein to allow air generated by respiration of a user to be introduced and moved therethrough, a part of the air flowpath being opened to form an opening; a second body which includes a respiration. measurement unit for measuring the pressure of air moving through the air flow path, is detachably formed at the first body, and is installed to close the opening formed through the first body; and a mouthpiece which is detachably coupled to the inlet side of the air flow path.

A mouthpiece for interfacing a subject to a respiratory measurement apparatus incorporates bite blocks and a tongue depressor such that when the bite blocks are clamped between teeth of the user's upper and lower jaws, the tongue depressor forces the user's tongue downward so as not to inhibit gas flow through a lumen of the mouthpiece. Also disclosed are cheek supports that can be coupled to the mouthpiece and where the space between adjacent cheek supports is selectively adjustable to fit the subject involved.