218 results about "Respiration monitoring" patented technology

Systems and methods provide for detecting respiration disturbances and changes in respiration disturbances, preferably by detecting variability in one or more respiration parameters. Respiration rate variability is determined for a variety of diagnostic and therapeutic purposes, including disease/disorder detection, diagnosis, treatment, and therapy titration. Systems and methods provide for generating a footprint, such as a two- or three-dimensional histogram, representative of a patient's respiration parameter variability, and generating one or more indices representative of quantitative measurements of the footprint.

The invention relates to a method for detection of respiration of a patient comprising the following steps: emitting an electromagnetic signal towards the patient; receiving a reflected electromagnetic signal reflected from the patient; converting the reflected electromagnetic signal, yielding a first signal; phase-shifting the reflected electromagnetic signal and converting the phase-shifted reflected electromagnetic signal, yielding a second signal; determining a first vector being defined by the time derivatives of the first signal and the second signal, for a common first point in time; determining a second and vector being defined by the time derivatives of the first signal and the second signal, for a common second point in time; and calculating the scalar product of the normalized first vector and the normalized second vector as an indicator value for a change from expiration to inspiration of the patient or vice versa. A change from expiration to inspiration of the patient or vice versa is preferably indicated if the indicator value is below a threshold value, preferably below a value of 0. In this way, a possibility for contactless remote respiration monitoring of a patient based on the Doppler radar principle is provided which is reliable and easy to handle.

A side-stream respiration monitoring sensor includes a body having a first end, a second end, and a detecting section disposed between the respective ends. The detecting section includes a first port and a second port positioned on generally opposite sides of a restricting member. The restricting member extends into a flow path formed through the body such that a pressure differential is generated between the first port and the second port. A sampling port is positioned downstream relative to a patient from the first and the second port and configured to acquire a respiration sample. The sensor is constructed to monitor respiration performance of premature infants “preemies”, or the like.

An improved non-invasive respiration monitor combines signals from a spirometer and laser chest displacement sensor to reduce signal error. The improved respirations signal can be used for position correction in radiation therapy and imaging applications and can be displayed to a user in breath control techniques.

A respiratory device is provided with a display showing a respiration signal related to a breathing pattern of a patient. This signal is derived from the difference between a sensed signal indicative of the respiration and airflow generated by the device and a baseline signal. The parameter is adjusted so that the respiration signal is restricted to a predetermined dynamic range. A short term average of the respiration signal (taken over about 0.5 seconds) and a long term average of respiration signals (taken over about 12 seconds) are calculated based on the CPAP measure. These averages are used to monitor the dynamic change in the respiration signal. If a large variation in either average is detected, the baseline is set to a value selected to rapidly reduce the respiration signal to a lower offset.

The invention comprises a patient respiration monitoring and/or control method and apparatus used in conjunction with multi-axis charged particle or proton beam radiation therapy of cancerous tumors. The respiration monitoring system uses thermal and/or force sensors to determine where a patient is in a respiration cycle in combination with a feedback signal control delivered to the patient to inform the patient when breath control is required. The resulting breath control is timed with charged particle delivery to the tumor to enhance accuracy, precision, and/or efficiency of tumor treatment.

The invention also relates to an optical sensor for a photoplethysmography measurement, comprising a light unit 1 with a light emitter 2 for emitting light into tissue of a patient 8 and/or a light detector 3 for detecting a part of the emitted light after interaction with the tissue, wherein the light unit is embedded in an elastic material 4. The invention further relates to a device for contactless respiration monitoring of a patient 8, comprising: a distance sensor for consecutively detecting the temporal distance variations relative to the patient's chest 12, preferably based on electromagnetic waves; and a calculating unit for determining the breathing activity based on the detected temporal distance variations. The invention is especially useful for providing a reliable and easy to use possibility for simultaneously monitoring respiration action, blood pressure and heart rate with a handheld device which can be used for spot-checking the vital parameters of patients in hospitals.

An impedance variation respiration monitor determines the variation in human body impedance between two electrodes coupled to the surface of the body. One of the two electrodes is attached to the thorax below the armpit and the other of the two electrodes is attached to the leg extending from the opposing side of the thorax. The variation in impedance between these two electrodes measured by the monitor is closely correlated to the respiration rate of the subject and is particularly responsive to and indicates combined abdominal and thoracic breathing.

A method of determining a respiration rate from a signal representative of a recorded respiration episode comprises identifying two or more uncorrupted segments within the signal, the uncorrupted segments being separated by corrupted segments, identifying the longest of the uncorrupted segments or the segment with a lowest average absolute deviation (AAD) between respiration peaks or troughs, and determining a respiration rate from the longest uncorrupted segment or the segment with the lowest AAD.

The invention provides a metabolism assessment system, which comprises a respiration monitoring module, a blood pressure and blood temperature monitoring module, a PH value measuring module, a living condition monitoring module, an impact factor monitoring module, an information processing module and a display module. The information processing module is in charge of continuously receiving, storing and transmitting information acquired by the respiration monitoring module and the impact factor monitoring module, calculating chest circumference and abdomen circumference differences of a sample between exhalation and inhalation under different impact factors, calculating a respiratory capacity within unit time in accordance with the chest circumference and abdomen circumference differences as well as a respiratory rate, and comparing the respiratory capacity with a preset threshold; and the information processing module, in combination with blood pressure, body temperature and PH value information, is used for analyzing work of respiratory dynamic performance and heart dynamic performance on blood circulation and lymphatic circulation, and for analyzing and assessing electromagnetic metabolism, chemical metabolism, mechanical metabolism and the like with the application of a correlation equation between the various impact factors. According to the comprehensive metabolism assessment system provided by the invention, human metabolism can be assessed by calculating the correlation equation on the basis of a big data technology.

The invention discloses a radio frequency respiration monitoring system and a compressive sensing implementing method. A radio frequency sensing network is formed by radio frequency nodes of the system; the radio frequency network is connected with a server through a base station; and the server is used for data storage and processing. The compressive sensing implementing method comprises the following steps of carrying out compressive sampling on a radio frequency link Received Signal Strength (RSS) signal in a random manner; reconstructing a respiratory movement signal by a sparse reconstruction algorithm; and extracting a respiration frequency value. According to the invention, thoracico-abdominal respiratory movement information is acquired by detecting the radio frequency link RSS signal; passive respiration monitoring is implemented; detection comfort is obviously improved; and respiration monitoring is simpler and more humanized. The radio frequency sensing network has low price, is convenient to deploy, is suitable for ubiquitous deployment and can be widely applied to places such as hospitals, clinics, nursing homes and families. A compressive sensing mechanism is introduced so as to not only limit data acquisition scale and reduce data transmission and storage cost, but also reduce energy consumption of the radio frequency sensing network and meet the application requirement for continuously monitoring for a long time.

The invention discloses a non-contact respiration monitoring method. The method comprises the following steps: positioning the thoracic-abdominal area of a monitored person in a depth video stream; carrying out dimension reduction on data in the thoracic-abdominal area of each frame image in the depth video stream; calculating variance of the dimension reduced data to obtain a thoracic-abdominal variation extent sequence; carrying out low-pass filtering on the thoracic-abdominal variation extent sequence to obtain a denoised respiration variation sequence; calculating a respiration frequency and a respiration pause time according to the respiration variation sequence. According to the method, the problem that the respiration process of the monitored person is possibly interfered by the contact type respiration monitoring is solved, the hardware cost and the equipment complexity are reduced.

The invention relates to the field of electronic devices, and discloses a humidity sensor, an electronic device and a respiration detection system and method. The humidity sensor is made of a sensitive thin film material sensitive to water vapor, response time can be greatly shortened, response amplitude is increased, several seconds to several minutes of the response time of a humidity sensor in the prior art are shortened below 0.1 second, the humidity (water vapor content) in environment gas can be measured, and real-time respiration monitoring is possible. Furthermore, the humidity sensor is adopted in the electronic device or the respiration detection system, the water vapor content in respiration can be monitored in real time, and therefore physical conditions are monitored and the guidance is provided for respiration exercise.

The invention discloses an anesthesia depth monitoring device and an anesthesia depth monitoring method and relates to the technical field of anesthesia depth monitoring. The anesthesia depth monitoring device comprises a casing, a touch display screen, a functional support and a monitoring system, wherein the monitoring system comprises a microprocessor as well as an auditory evoked potential, anentropy index module, a respiration monitoring module, an electrocardiogram monitoring module and a pulse monitoring module which are connected with the microprocessor respectively, each module acquires signals in real time and feeds the signals back to the microprocessor, and the signals are input into the touch display screen through a serial port communication module. The device can continuously and noninvasively monitor and display change of anesthesia depth in real time, create good operation conditions, better reflect change of anesthetic concentration and change of operation stimulation and reduce operation and anesthesia risks and is suitable to be promoted and applied in medical institutions.

Discloses are an improved device-less 4 dimensional-computed tomography (D4D-CT) imaging method, device and system. The method comprises the steps of determining lung zoom values on collected CT slices of a patient's lug area; generating a respiration curve of the patient according to the lung zoom values; and selecting the collected CT slices on the basis of the generated respiration curve so as to be used for D4D-CT imaging. Under the conditions that an external respiration monitoring device is not needed, the appropriate CT slices can be selected to be used for D4D-CT imaging, so that artifacts caused by the respiration curve of the patient in prior art of D4D-CT are removed, and quality of D4D-CT images is improved.

The invention discloses a vision technology-based respiration monitoring device which can monitor the fluctuating change of the chest when a patient breathes without contact so as to monitor the vital sign of the patient. The vision technology-based respiration monitoring device comprises a camera, a processor, an image acquiring unit, an image preprocessing module, a contour characteristic extracting module and a respiration analyzing module, wherein the camera is used for obtaining a sequence image frame of the patient; the processor is used for carrying out analysis processing and input and output signal control on the sequence image frame and displaying a monitoring parameter on a connected display screen; the image acquiring unit is used for transmitting the sequence image frame of the camera to the processor for processing after acquiring the sequence image frame; the image preprocessing module is used for carrying out the processing of denoising, strengthening, and the like on the sequence image frame; the contour characteristic extracting module is used for extracting the contour characteristic when the patient breathes from the sequence image frame; and the respiration analyzing module is used for calculating respiration frequency according to the change rule of the contour characteristic along with time and carrying out skin color monitoring, and the like.

The invention relates to a human heart rate and respiration measurement device, in particular to a device for continuously measuring heart rate and respiration and providing records and data treatment. The invention discloses a wearable heart rate and respiration monitoring device. The wearable heart rate and respiration monitoring device comprises a heart rate signal acquiring unit, a respiration signal acquiring unit, a signal processing unit, a signal converting unit and a data transmitting unit, wherein heart rate data are acquired through a piezoelectric film sensor, respiration data are acquired through elastic deformation of a double-side protruding structure, and the piezoelectric film sensor is located on the outer surface of the double-side protruding structure and used for making contact with skin. The monitoring device can monitor heart rate and respiration at the same time and is simple, data stability is high, and cardiovascular diseases can be effectively prevented.

The invention discloses a lung respiration monitoring system based on magnetic detection electrical impedance imaging. By means of an excitation source module, excitation signals are introduced to the chest cavity of an imaging body through a plurality of pairs of excitation electrodes bonded to the measured imaging body; a measurement module is composed of a series of measurement coils and used for measuring the magnetic induction intensity of an induced magnetic field caused by exciting current around the chest cavity; a control module is used for controlling the signal excitation and magnetic field measurement process during the whole respiration monitoring; an image reconstructing module obtains the image change of electrical inductance distribution of the chest cavity in the respiration process according to an electrical impedance image reconstruction algorithm on the basis of magnetic field distribution data. According to the system, the measurement coils of any number can be placed in the space around the chest cavity of the imaging body, limitation of a traditional electrical impedance imaging system on measurement information is changed, the system has the advantages of being high in measurement precision, high in speed and reliability and free of injuries to a human body, more importantly, information amount is increased by means of a magnetic field measurement mode, and therefore the electrical impedance reconstructing ill conditioning is changed, the resolution ratio of electrical impedance (or impedance spectrum) images is increased, and the image reconstruction quality is improved.