207 results about "Respiratory status" patented technology

A capnograph which performs an analysis of the breath waveforms measured by the carbon dioxide sensor, interprets the results of this analysis, and outputs to the operator diagnostic information about the respiratory status of the patient, or about the adequacy of the breathing support provided to the patient. The instrument compares a number of parameters characteristic of the waveforms of the patient's breath with an internal library of the values of those parameters expected from normal waveforms stored in its memory. These parameters may either relate to specific features of the waveform in the time domain, or may characterize spectral components of the waveform in the frequency domain. The capnographic waveform analysis may be combined with further non-invasive measurements in order to provide an indication of the deviation of the value of EtCO2 from PaCO2.

An improved sensor (102) for hydration 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 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 a 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 hydration, such as fluid losses, fluid ingested, fluid balance, or rate of fluid loss, in part based on a noninvasive measure of components of the bloodstream. In one example, variations in components of the bloodstream over time such as hemoglobin and water are determined based on the detected light, and the measure of hydration is then determined based on the in components of the bloodstream over time. In the absence of the LED light, 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 heart rate variability, respiratory status, or even confirmation that the tissue is alive. Hydration monitoring systems incorporating the sensor, as well as methods, are also disclosed.

The invention discloses a sleep apnea syndrome detecting system. The sleep apnea syndrome detecting system is composed of a sleep respiration detecting device, a processing and diagnosing device, a thermistor sensor, positive electrodes and negative electrodes, wherein the sleep respiration detecting device is composed of a protecting circuit, a resistance type respiration detecting module, an electrocardio signal detecting module, an acceleration detecting module, a oral-nasal respiration detecting module, a processor module and a wireless communication module; the thermistor sensor is used for detecting oral-nasal respiratory airflow; the positive electrodes and the negative electrodes are used for detecting body chest breathing and electrocardio signals. Through the sleep apnea syndrome detecting system, a patient does not need to be hospitalized; the sleep apnea syndrome detecting system is simple and avoids physiological and psychological burdens. The sleep apnea syndrome detecting system can comprehensively detect the respiratory status of different parts of a human body to achieve the aim of sleep apnea syndrome classification and diagnosis, and meanwhile is simple in operation and can be used at home.

The invention provides a breath monitoring device comprising means to record a first breathing state of a user, and means to detect a deviation from the recorded breathing state in a subsequent use of the device by a user. The invention further provides a method of monitoring breaths, the method comprising the steps of: (a) recording the first breathing state of a person from a breath of a person; and (b) detecting a deviation from the recorded first breathing state in a subsequent breath from a person.

A respiratory state monitor for a sleeping user is composed of a main body with microprocessor, amplifier, A / D converter, display unit, memory, battery unit and transmission interface, a respiratory state sensor unit, and a snore sound sensor unit. Its monitoring method is also disclosed.

Described are a positive airway pressure system and method for treatment of a sleeping disorder in a patient. The system includes a generator, a sensor and a processing arrangement. The generator supplies airflow and applies a pressure at to an airway of a patient. The sensor measures data corresponding to patient's breathing patterns. The processing arrangement analyzes the breathing patterns to determine whether the breathing patterns are indicative of at least one of the following patient's states: (i) a regular breathing state, (ii) a sleep disorder breathing state, (iii) a REM sleep state and (iv) a troubled wakefulness state. The processing arrangement adjusts the applied pressure as a function of the patient's state.

Ventilation therapy systems and methods are disclosed. The system comprises a computing device, and a plurality of sensors for acquiring a physiological bioelectrical impedance signal from a patient, wherein the sensors are functionally connected to the computing device. The computing device receives the physiological bioelectrical impedance signal from the sensors, analyzes the physiological bioelectrical impedance signal, based on the analyzed physiological bioelectrical impedance signal, monitors the patient's respiratory status before and / or after extubation, and provides audible or visual recommendations for additional respiratory treatment or medications based on the patient's respiratory status.

The invention discloses a breathing machine control method and a breathing machine applying the control method. The breathing machine comprises a flow sensor, a pressure sensor, a microcontroller, a motor power amplifier and a blower. The breathing machine adopts a breathing synchronization pressure control method; particularly, the flow sensor detects the change in the flow of a pipeline, an expiration state and an inspiration state of a patient are judged according to a set flow threshold; and further, a preset pressure level is selected for switching according to the breathing state. Generally, when inspiration is converted into expiration in an air path system, man-machine confrontation is caused due to air accumulation at a nasal mask end. Therefore, a deviation between a set inspiration duration and a forecast duration serves as a time stamp of the beginning of the expiration after adjustment. The lower expiratory pressure is selected in advance, so that the pressure can be released timely, the man-machine confrontation is eliminated, and the man-machine synchronism is improved. The control mode meets breathing physiology requirements of people, and the breathing comfort and effectiveness of the patient are guaranteed.

A system for improving a breathing pattern with an interactive multi-sensory approach is provided. The system includes a breathing condition detector and a processor, for guiding a user to learn a suitable breathing pattern. The breathing condition detector attached to the user, is adapted to detect a breathing condition according to a natural expansion or a natural shrinkage of a body of the user. The breathing condition at least includes a breathing mode (breast breathing or belly breathing), breathing rate, and breathing depth. The processor displays a relative breathing condition picture reflecting the detected breathing condition detected by the breathing condition detector on a monitor. As such, the user can understand the practical breathing condition by viewing the breathing condition picture, so as to be instructed to learn to use a breathing pattern suitable for him.

The invention discloses an auxiliary radiotherapy mattress system guided by images and breath, comprising a data processor, a breath detector, an auxiliary motion mattress and an auxiliary motion mattress controller. The breath state detected by the breath detector is sent to the data processor, and the auxiliary motion mattress controller is respectively connected with the data processor and the auxiliary motion mattress. The cooperation of the system and the traditional radiotherapy device endows the traditional radiotherapy device with the function of image guiding radiotherapy. When the system is used, a relational model of the breath state and the tumor displacement is built based on the breath state sequence and the tumor anatomical structure image sequence which are collected synchronously, the breath state of the next moment is forecasted according to the current breath state and the former breath state during the radiotherapy, then the relational model of the breath state and the tumor displacement is used to calculate the predicted tumor displacement and the position of the patient is adjusted in real time to align the center of the tumor with the focus of the radioactive source, thereby reducing the injuries to the normal tissue of the patient caused by the radioactive ray.

The invention relates to the field of medical instruments and particularly discloses a mechanical ventilation control method of a positive pressure respirator and the respirator. According to the mechanical ventilation control method of the positive pressure respirator, the respiration state is judged by a microcontroller according to air pressure and air flow, the pressure information is used as the input parameter of a PID controller, a control voltage is obtained after the pressure information is input into the PID controller, then an air supply device is controlled, and pressure is provided for a respiration catheter; a next inspiration time is predicted during the expiratory phase, the respirator is controlled to release pressure in advance during the inspiratory phase, and the respirator is controlled to generate positive pressure support at the tail stage of expiration. The mechanical ventilation control method of the positive pressure respirator and the respirator have the advantages that predetermined respiration pressure can be obtained fast, and pressure fluctuation is reduced; due to the fact that the pressure is released in advance before the inspiratory phase, man-machine synchronism is improved; in addition, due to the fact that the positive pressure support is added at the tail stage of expiration, the respirator can better conform with human body respiration physiological characteristics, and the problem that an air passage is closed again due to over low pressure support is solved.

The system 10 includes an endoscopic probe 20 and an expired air sampling device 24 functionally connected to a control console 28. In use, the endoscopic probe 20 is routed through a body lumen of a patient to, for example, visualize a selected region of a patient's body. As the endoscopic probe 20 is routed through the body lumens, the expired air sampling device 24 collects expired air from the patient, generates signals indicative of patient respiratory status, and outputs the generated signals to the control console 28. The control console 28 processes the signals and monitors the respiratory status of the patient. If the respiratory status of the patient changes based on the processed signals of the expired air sampling device 24, the control console 28 may output an audible or visual alert signal.

The invention belongs to the field of oxygen supply, and relates to a method for detecting breathing state during pulse oxygen supply. The method is characterized by comprising the following steps: detecting breathing pressure by using a pressure sensor; judging the breathing state by using a three-point pressure detection method; and performing correction by using a pressure detection lag method and a breathing experience judgment method as aiding methods so as to improve the accuracy for judging the breathing state. A voltage signal output by the pressure sensor is amplified by a signal amplification circuit, the amplified voltage signal is transmitted to an analog-digital conversion port of a main control chip and is transmitted to the main control chip after the analog-digital conversion, and the main control chip judges the breathing state through the method for detecting the breathing state; and a high-degree voltage regulator circuit supplies high-precision reference voltage to the analog-digital conversion so as to eliminate incorrect judgment caused by jitters of the reference voltage and improve the accuracy for judging the breathing state; and besides, the oxygen supply frequency is completely determined by a breather so as to eliminate phenomena of missed blowout and continuous blowout.

A ventilator turbine volume-controlled ventilation method that implements volume-controlled ventilation for a ventilator by means of turbine motor rotational speed control, inhalation phase control, and exhalation phase control. The method comprises the main steps of: the ventilator is started up, a control unit in the ventilator issues a rotation speed U control instruction to a turbine driver, the turbine driver drives a turbine motor, and then the control unit detects the breathing state of a patient, if the patient needs to inhale air, proceeds to an inhalation phase control, and, if the patient needs to exhale air, proceeds to an exhalation phase control, where the inhalation phase control is implemented by the control unit that outputs driving voltage V 1 to regulate the extent to which an inhalation valve is opened, and the exhalation phase control is implemented by the control unit that outputs driving voltage V 2 to regulate the extent to which an exhalation valve is opened. By combining control of some operating parameters of the ventilator with the rotational speed of the turbine motor, the method implements constant current control and real-time synchronous control of the turbine motor, thus allowing air supply to be provided to the ventilator by the turbine motor at places such as in the field where air supply cannot be provided.

The invention provides a control method of an oxygen therapy instrument. A pressure sensor is added in an air outlet of the oxygen therapy instrument to detect the respiratory conditions of a user, during inspiration of the user, oxygen is output by controlling a proportional valve, and during expiration of the user, oxygen output is closed. The control method of the oxygen therapy instrument hasthe advantages that under the situation that the user needs the same oxygen flow, the oxygen therapy instrument of the method reduces the power of oxygen production by 2 / 3, and then the noise of oxygen production and the size of the oxygen therapy instrument can also be correspondingly reduced; continuous oxygen delivery can cause dry injury of the mucous membrane in the local respiratory tract, and during expiration, oxygen output is stopped so that the breath of the patient can be more smooth; the breath state can be accurately judged, the control precision of the oxygen flow is high, the adjustment of the oxygen output amount is sensitive, the comfort of the oxygen inhalation is improved, and side effects are reduced; a blood oxygen detection module is added to detect the oxyhemoglobinsaturation of the user during use and monitor the treatment condition of the user in real time, and the oxygen flow is intelligently adjusted according to the oxyhemoglobin saturation to save energy under the best treatment effect.

Methods and apparatus provide monitoring of a sleep disordered breathing state of a person such as for screening. One or more sensors may be configured for non-contact active and / or passive sensing. The processor(s) (7304, 7006) may extract respiratory effort signal(s) from one or more motion signals generated by active non-contact sensing with the sensor(s). The processor(s) may extract one or more energy band signals from an acoustic audio signal generated by passive non-contact sensing with the sensor(s). The processor(s) may assess the energy band signal(s) and / or the respiratory efforts signal(s) to generate intensity signal(s) representing sleep disorder breathing modulation. The processor(s) may classify feature(s) derived from the one or more intensity signals to generate measure(s) of sleep disordered breathing. The processor may generate a sleep disordered breathing indicator based on the measure(s) of sleep disordered breathing. Some versions may evaluate sensing signal(s) to generate indication(s) of cough event(s) and / or cough type.

The invention relates to an apparatus and method for determining physiologic parameters of a patient. The apparatus comprises a patient monitor reading in a pressure signal from a pressure sensor measuring an arterial pressure of the patient employing an arterial catheter. The patient monitor can also read in an electrocardiography signal from an ECG device The patient monitor determines curve characteristics indicative for a breathing state and / or a heart rhythm state of the patient and switches from a first volume responsiveness indication state to a second volume responsiveness indication state, if a first condition is met by the curve characteristics, and from the second volume responsiveness indication state to the first volume responsiveness indication state, if a second condition is met. Thus, two visually and / or audibly distinguishable indication states are provided depending on - whether the relevant curve characteristics indicate that the patient is in an arrhythmic condition, and / or - whether the relevant curve characteristics indicate that the patient is breathing spontaneously.

During treatment by brachytherapy, radiation passes beyond the target volume and delivers radiation dose to adjacent tissue such as the lungs and, especially in the case of treatment of the left breast, to the heart. The heart is particularly vulnerable to radiation; to minimise the dose it receives in such circumstances, we propose an apparatus for treatment by brachytherapy comprising an X-ray source sized for insertion into a patient, a respiration state monitor, and a control apparatus adapted to receive respiration state information from the respiration state monitor and control the output of the X-ray source; the control apparatus being arranged to operate the X-ray source at a first output level when the respiration state monitor indicates a degree of lung inflation above a first preset threshold and operate the X-ray source at a second and lower output level when the respiration state monitor indicates a degree of lung inflation below a second preset threshold.

The invention discloses a respiratory signal extraction and respiratory movement guide device which comprises a treatment couch, a frame above the treatment couch, a laser generator, three sets of image pick-up units, a display and an image processing center. The frame comprises a crossbeam at the front upper place of the frame and the both sides of the crossbeam are provided respectively with a side beam which can be fixed in a rotatable manner. The laser generator is fixed on the crossbeam and the three sets of image pick-up units are respectively fixed in the center of the crossbeam and in front of the two side beams; a data processing center is connected with a camera and the display respectively. The respiratory signal extraction and respiratory movement guide device has the advantages that: (1) the body surface movement of the breast or abdomen of a patient is traced by the three sets of image pick-up units and then shooting data are processed for extracting respiratory signals of the patient; and (2) simultaneously, video guide and audio guide are carried out to the patient and the extracted respiratory signals of the patient are compared with module signals of respiratory movement so as to ensure that the patient can effectively control the respiratory status of the patient, thereby realizing the respiratory guide.

A system for controlling administration of a respiratory depressant drug or mixture of drugs to a spontaneously breathing patient comprises a drug delivery unit (3), being adapted for indexed or continuous and automatic titration of a respiratory depressant drug or mixture of such drugs to said patient (1), and a control apparatus (6), receiving measurement signals (20) relative to the respiratory state of said patient (1) and issuing control signals (27) to said drug delivery unit (3), wherein the control apparatus is adapted to keep said measurement signals relative to the respiratory state to a predetermined condition and thereby providing adequate sedation and / or analgesia to said patient.

The invention relates to a respiratory signal determination algorithm for a positive pressure ventilation therapeutic machine. The determination algorithm comprises the following steps: collecting flow data of the positive pressure ventilation therapeutic machine by virtue of an MCU (micro-programmed control unit) in accordance with a recurrence method, and calculating a gas flow variation; and in accordance with a current respiratory state of a patient, regulating a pressure state of the respiratory machine (the positive pressure ventilation therapeutic machine). The determination algorithm, which is free from influence of a basic airflow, can conduct accurate respiratory signal determination even when measurement on the basic airflow is inaccurate; the algorithm is simple and high in response speed; and a determination threshold is adjustable, so that the most appropriate parameters can be obtained when the therapeutic machine is applied to different patients.

A pressurized flow of breathable gas is delivered to the airway of a subject in accordance with a therapy regimen. One or more fluid parameters of the pressurized flow of breathable gas are adjusted based on the therapy regimen. The therapy regimen dictates that such adjustments be made based on the respiratory state of the subject. Transitions in respiratory state are identified without relying on measurement or estimation of flow at or near the airway of subject. Transitions in respiratory state are identified based on changes in the first time derivative of flow at or near the airway of the subject. In one embodiment, an effort parameter is determined that approximates the second time derivative of flow. Based on comparisons of the effort parameter to a dynamic threshold, transitions in respiratory state are identified.

The invention relates to a respirator system capable of estimating the respiration state of a patient, for smart health care and a control method of the respirator system. The respirator system is characterized in that a respirator comprises a controller, a fan, a pipeline and a sensor, wherein the fan is used for outputting rotating speed under a set working voltage, and then wind pressure is transformed by blades to be transported to the pipeline; the sensor is used for detecting air duct real-time flow, air duct real-time pressure and real-time carbon dioxide concentration and performing feeding back to the controller; and the controller is used for controlling the respirator according to the air duct real-time flow and the air duct real-time pressure, and estimating the respiration state of the patient according to the acquired air duct real-time pressure data.

Methods and system for treating obstructive sleep apnea and snoring are disclosed. The system generally comprises a mask for delivering pressurized air to patient's breathing orifice, a sensing mechanism for continuously assessing the state of patient's breathing and a pressure generator for generating the pressurized air in the mask. The pressurized air is applied to the breathing orifice only during selected portions of the breathing cycle, when such pressure might be required to prevent occlusion of the airway or to restore patency of the airway after such occlusion occurs.

Ventilation therapy systems and methods are disclosed. The system comprises a computing device, and a plurality of sensors for acquiring a physiological bioelectrical impedance signal from a patient,wherein the sensors are functionally connected to the computing device. The computing device receives the physiological bioelectrical impedance signal from the sensors, analyzes the physiological bioelectrical impedance signal, based on the analyzed physiological bioelectrical impedance signal, monitors the patient's respiratory status before and / or after extubation, and provides audible or visualrecommendations for additional respiratory treatment or medications based on the patient's respiratory status.

The invention relates to a motion control method for a flexible endoscope operation robot. The method comprises the steps of firstly, obtaining image information within a complete respiratory motion cycle of a human body; accurately determining the edge contour of organ tissue by using a medical image wave filtering and partitioning algorithm; determining displacement change condition of the organs along with the time according to the edge contour information, and drawing a displacement-time curve under respiration; and under the condition that the displacement-time curve of the organ is determined, performing motion compensation on the endoscope operation robot by referencing the cycle of the displacement-time curve and a fluctuation amplitude. A real-time ultrasound image is used for directly tracking the motion of the organs, so that the respiratory motion law of different human bodies and the same human body in different time ranges can be directly displayed; the displacement-timecurve of the organs under the breathing state, obtained by collected ultrasonic images and orifical hole images acquired by the endoscope are registered, so that compensation can be performed on displacement deviation between the endoscope and human organs generated by breathing.