26 results about "Expiratory gas flow" patented technology

The embodiment of the invention provides a PetCO2-based RER estimation method, device and equipment and a storage medium, firstly, an upper computer sends a connection signal to measurement equipment for connection when a user state is an initial state, and then displays a user real-time expiration flow and a user Ef when the user state is converted from a quasi expiration state to a constant flow expiration state; the difference value between the real-time expiratory flow of the user and the user Ef is within a preset threshold range, then a measurement stopping instruction is sent to the measuring device when the preset time is up and the user state is an exhalation state, and the end-expiratory carbon dioxide concentration is calculated according to the real-time expiratory flow; and finally, obtaining a corresponding RER value according to the mapping relationship between the end-expiratory carbon dioxide concentration and the RER. The RER value is estimated through the end-expiratory carbon dioxide concentration, so that the measurement process is simplified, and the manufacturing cost and the maintenance cost of equipment can be reduced.

The invention provides a lung expiration training system for nursing a patient outside a chest, which relates to the technical field of medical rehabilitation training and comprises a respiratory signal acquisition module, a main control and signal processing module, a feedback and excitation module and a data management and scheme customization module, the respiratory signal acquisition module is used for acquiring an instantaneous pressure difference signal in the expiration process of a patient in real time by utilizing a differential pressure type flow sensor; the main control and signal processing module converts the pressure difference signal into instantaneous flow, obtains an expiration flow-time curve, a primary expiration amount and expiration efficiency based on discrete sampling, smooth operation and integral calculation, and calculates an error sum of squares and a curve goodness of fit to form a comprehensive control amount; the feedback and excitation module provides visual, auditory or tactile feedback according to the comprehensive control quantity, and can present a gamification interface to guide the patient to adjust the breathing rhythm; the data management and scheme customization module is used for setting a personalized training scheme and recording training data, and the trend analysis unit generates a rehabilitation trend report based on historical indexes.

The invention discloses an electric turbine anaesthesia machine with an automatic air supply function of an air storage bag and a method, and the anaesthesia machine comprises a turbine which is used as an active inspiration air source; a detachable air storage bag; an air supply one-way valve; the breathing circuit is connected between the turbine outlet and the patient end and comprises an inspiration branch provided with a flow diaphragm, an expiration branch provided with an expiration EV valve and an expiration flow diaphragm, and a patient breathing circuit tank assembly containing the air storage bag and the soda lime tank; a plurality of sensors; the control unit is electrically connected with and controls the turbine and the expiration EV valve, receives signals of the sensor and is used for achieving different breathing ventilation modes. According to the anesthesia machine and method, turbine driving is adopted, the tidal volume adjusting range is wide, and physical limitation of a folding bag is avoided; the air storage bag is externally arranged and replaceable, so that cleaning and maintenance are facilitated; a one-way valve automatic gas supply mechanism ensures continuous and stable gas supply; the device supports various breathing modes, and is suitable for various scenes such as anesthesia maintenance, postoperative awakening, oxygen therapy and the like.

To provide a user interface capable of easily confirming evaluation of a daily fluctuation of an exhalation flow rate.SOLUTION: A program for displaying a measurement result of an exhalation flow rate on a display device in a graph causes a computer to execute display control for displaying a bar graph connecting a maximum and a minimum in the graph for each day on the basis of a plurality of measurement values of the exhalation flow rate measured in one day and causing the display device to perform identification display for making visibility different according to an evaluation value of a daily fluctuation of the plurality of measurement values.SELECTED DRAWING: Figure 3

The utility model provides a breathing circuit and an anaesthesia machine, the breathing circuit comprises an inspiration flow sensor, an expiration flow sensor, a heating module and a wireless power supply module, the heating module is arranged on the inspiration flow sensor and / or the expiration flow sensor; the wireless power supply module is wirelessly connected with the heating module; the wireless power supply module is configured to transmit a wireless power supply signal to the heating module; and the heating module is configured to start a heating function when a wireless power supply signal is received so as to heat gas flowing through the inspiration flow sensor and / or the expiration flow sensor. Therefore, the influence of gas condensation on the test precision can be prevented, the heating module can be prevented from being damaged due to disassembly, the service life of the heating module is prolonged, and meanwhile, the cost of the breathing loop is reduced.

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.

The invention relates to the field of intelligent testing, and discloses an anaesthesia machine testing method, device and equipment and a medium, and the method comprises the steps: controlling an anaesthesia machine to close an exhaust port of a mechanical ventilation loop of the anaesthesia machine, transmitting gas to the mechanical ventilation loop until the airway pressure of the mechanical ventilation loop reaches a preset testing pressure, stopping gas transmission, and maintaining a preset pressure stabilization duration, recording the initial pressure, the highest pressure and the end pressure in the gas transmission process through a pressure sensor of the mechanical ventilation loop; the gas conveying flow, the inspiration flow and the expiration flow in the gas conveying and preset pressure stabilizing duration maintaining process are collected; and according to the initial pressure, the highest pressure, the end pressure and the corresponding initial moment, the highest moment and the end moment, combining the gas transmission flow, the inspiration flow and the expiration flow, calculating the leakage rate of the mechanical ventilation loop and the pipeline compliance, and according to the leakage rate of the mechanical ventilation loop and the pipeline compliance, obtaining a test result. The problems of high test cost and complex operation of the anaesthesia machine in the prior art are solved.

This utility model provides a respiratory training device for respiratory function training, relating to the field of respiratory function training technology. It includes a lung flute body, with a connecting tube fixed to the output end of the lung flute body. A connecting tube is provided at the end of the connecting tube away from the lung flute body, and a mask is fixed to the end of the connecting tube away from the connecting tube. Supports are fixed to both ends of the outer wall of the lung flute body. The mask design transforms the traditional mouthpiece at one end of the connecting sleeve into a mask-type mouthpiece, preventing air leakage during patient exhalation and improving training effectiveness. Furthermore, the strap design allows the mask to be securely attached to the user's face, preventing accidental drop and enhancing stability. Additionally, the device incorporates a flow sensor to accurately measure the airflow velocity and flow rate during exhalation. By continuously monitoring the expiratory flow rate data, it can observe whether the expiratory flow rate has increased after a period of lung flute training.

Disclosed herein are apparatuses for monitoring user health via an inhaler as well as systems and methods thereof. The apparatus can include the inhaler as well as a power source, sensors, and a computing system. The sensors can include a first sensor configured to capture expiratory flow data from within the inhaler and a second sensor configured to capture pulse oximetry or heart rate data from a user of the inhaler. The computing system can be configured to process the data captured by the sensors and record the data as corresponding peak expiratory flow information and pulse oximetry or heart rate information. The apparatus can also include an electronics board, configured to communicatively couple the power source, the sensors, and the computing system.

An inhalation device includes a housing defining an air flow channel, a pressure sensor configured to detect air flow within the air flow channel, and a piezoelectric driven ejector configured to eject droplets of a fluid into the air flow channel. A controller is electrically coupled to the pressure sensor and the piezoelectric driven ejector. During an initialization phase in which a user takes a set number of deep breaths, the controller determines a trigger point based on measured inhalation flow. The pressure sensor generates a peak inspiratory flow measurement based on a minimum pressure during inhalation and a pulmonary output based on a maximum flow achieved during exhalation. During a dosing inhalation, the controller actuates the piezoelectric driven ejector when the trigger point is reached to dispense a dose of the fluid. The device may further generate pulmonary health management information based on inspiratory and expiratory flow measurements.

The invention discloses a child respiratory training device integrating respiratory muscle strength detection and muscle strength training, which comprises a main body shell, a respiratory interface and a pressure detection unit, the respiratory interface is arranged at the front end of the main body shell, the pressure detection unit is located in the main body shell, and a multi-stage pressure regulation chamber is arranged in the main body shell. The multi-stage pressure adjusting cavity comprises a first pressure cavity, a second pressure cavity and a third pressure cavity which are communicated in sequence, the pressure cavities are connected through adjustable resistance valves, and the opening degree of the adjustable resistance valves is automatically adjusted by an intelligent control module according to breathing parameters of a user; a two-way flow sensor is arranged in the first pressure cavity and can detect inspiration flow and expiration flow at the same time. And a vortex regulator is mounted in the second pressure cavity and comprises a rotatable guide vane and a driving motor.

The invention relates to a breathing circuit structure of an anaesthesia machine and a method for calibrating a flow probe. The breathing loop structure comprises a water accumulation cup branch which is branched from an expiration flow path between the expiration flow probe and the expiration one-way valve, and a water accumulation cup is detachably connected to the tail end of the water accumulation cup branch. The calibration method comprises the following steps: connecting the connecting pipe between the expiration connector and the inspiration connector to form fluid communication between the expiration connector and the inspiration connector; the water accumulating cup branch is separated from the water accumulating cup, so that the water accumulating cup branch is communicated with the external atmosphere; working gas is injected through the fresh gas branch, sequentially passes through the inspiration one-way valve, the inspiration flow probe, the inspiration connector, the connecting pipe, the expiration connector and the expiration flow probe and finally flows out of the water accumulation cup branch. The flow of the working gas flowing out of the water accumulation cup branch and the output results of the inspiration flow probe and the expiration flow probe corresponding to the flow are detected, so that the inspiration flow probe and the expiration flow probe are calibrated.

The invention discloses an oscillation frequency testing system and method, and the system comprises an air storage unit which is used for providing an airflow source with preset flow and preset pressure; the testing unit is connected with the gas storage unit and used for recording the pressure value, the flow value and the operation time of the output gas generated by the gas storage unit; and the control unit is connected with the test unit and the gas storage unit, and is used for inputting and transmitting preset parameters to the test unit and the gas storage unit, outputting the pressure value, the flow value and the operation time, and outputting an oscillation frequency operation curve. The testing method comprises the following steps: connecting the connecting pipe with the gas storage unit in a sealing manner; output gas with expiration frequency, expiration flow, expiration pressure and expiration volume is provided for the oscillation frequency testing system through the connecting pipe, testing is started, and an oscillation frequency operation curve is obtained; and outputting the calculated value of the oscillation frequency. The test system can ensure high precision of test, improve test efficiency and meet test requirements of different devices.

The application discloses a kind of based on multi-source data fusion expiratory nitric oxide detection method, system and equipment.Belong to medical detection technical field.It includes: using phased multitask learning framework, utilize standard gas data training model to master the basic nonlinear response of sensor and environmental cross sensitivity;Then, the clinical expiratory real sample data are fused, and the model is consolidated physical law while learning the ability to suppress complex expiratory matrix effect and individual difference interference by multitask learning.Training completed lightweight artificial intelligence correction model is deployed in embedded microprocessor, and can carry out integrated intelligent correction to real-time acquisition sensor signal, environmental temperature and humidity and expiratory flow.The application breaks through the performance limit of commercial sensor, realizes the sub-ppb level ultra-sensitive detection of expiratory nitric oxide and high clinical consistency output, and has strong environmental robustness, provides low-cost, high-precision and reliable solution for primary medical care and family health monitoring.

The application provides a VR respiratory rehabilitation training system based on gas sensing and terminal virtual mapping, adopts a BLE peripheral to collect nose / mouth-inhale / exhale flow signals (including a special detection device, and a reminder is triggered when the nose / mouth-inhale / exhale is not used) and mouth-exhale flow signals in real time, generates individualized inhale relative indexes and drives the water absorption and water spraying actions of the VR scene through filtering and dynamic calibration. The system supports two fire extinguishing scene modes, inhale and exhale detection is enabled and the user is guided to master the correct method of 'nose / mouth-inhale / exhale + mouth-exhale' during the initial training, and the training time is strictly controlled within 10 minutes. The training amount is quantified and visual feedback is realized through an integral model, the difficulty is automatically adjusted according to the historical performance, and an integral ranking function is newly added. The data only retains feature abstract, integral statistics and desensitization ranking information, and the privacy safety is ensured. The scheme has the advantages of low contact, portability and interesting, and is suitable for children or adult lung function rehabilitation and home training scene.

A present ventilator system for detecting and treating concurrent chronic obstructive pulmonary disease (COPD) and overlap syndrome of obstructive sleep apnea (OSA events) includes a pressure generator for generating a pressurized flow of breathable gas for delivery to an airway of a subject, a sensor(s) for generating an output signal conveying information related to a parameter of the breathable gas, and a processor(s) operably connected to the sensor(s) and the pressure generator, configured to detect the presence of an OSA event and / or expiratory flow limitation (EFL) in the subject based on the output signal. In response to detecting the concurrent presence of an OSA event and EFL, the processor is configured to determine an OSA event therapy parameter for treating the detected OSA event in the subject, determine an EFL therapy parameter for treating the detected EFL in the subject, determine a priority treatment based on a comparison between the OSA event therapy parameter and the EFL therapy parameter, and control the pressure generator to deliver the determined priority treatment.

The invention relates to the technical field of respiratory rehabilitation equipment, in particular to an airway clearance device capable of adaptively adjusting oscillation frequency based on fluid resonance, which comprises a shell and a mouthpiece, a dehumidification mechanism is arranged on one side of the shell, a flow guide mechanism is mounted in the shell, the flow guide mechanism divides the space in the shell into an air inlet cavity and a vibration cavity, and the air inlet cavity is communicated with the vibration cavity. The input part and the output part of the dehumidification mechanism are respectively communicated with the mouthpiece and the air inlet cavity through fluid; an oscillation plate mechanism is mounted in the vibration cavity and is in driving connection with the moisture absorption part of the dehumidification mechanism; and a fixed magnet is mounted on the oscillating plate mechanism. In the using process, when the expiration flow is attenuated, the swinging amplitude of the oscillation plate is automatically reduced, so that the vibration frequency is improved, frequency reduction caused by factors such as lung function reduction of a user or insufficient power in the later period of expiration is effectively compensated, the effective treatment time of the device is widened, the duration time of the resonance effect is prolonged, and the treatment effect of the device is improved. Therefore, the continuity and the stability of the treatment effect in a single expiration period are ensured.

The application discloses an intelligent evaluation system for ventilation function examination, and solves the problem that the quality evaluation of ventilation function examination is mainly based on subjective feeling, lacks reasonable and objective evaluation standards, and is prone to evaluation errors and confusion, and the technical scheme is as follows: a lung function instrument for measurement, a VC measurement and judgment module for judging the measurement result of vital capacity, a curve display and judgment module for synchronously measuring and displaying a forced vital capacity curve and a maximum expiratory flow volume curve, a measurement reminding module for measurement reminding, and a processing and evaluation module for evaluating the measurement result and selecting a corresponding curve for parameter calculation.The intelligent evaluation system for ventilation function examination can objectively and accurately evaluate the quality of ventilation examination, and significantly improves the accuracy and efficiency of lung ventilation function examination.

The embodiment of the invention provides a cough peak flow rate control method and device, electronic equipment and a storage medium, and relates to the technical field of instrument control. The method comprises the following steps: acquiring a gas pressure difference signal, and calculating an analog voltage signal based on the gas pressure difference signal; acquiring expiration flow data, and fitting a plurality of expiration flow data and the forced vital capacity in a preset time period; calculating a corresponding target cough peak flow rate based on the forced vital capacity; and adjusting the opening degree of a valve body of the expectoration machine to enable the expectoration machine to output the target cough peak flow rate. According to the method, the cough peak flow rate required by a patient can be well analyzed; the valve body is opened and closed according to the needed cough peak flow rate, and power waste is reduced. And the power can be well saved.

The invention discloses a multi-dimensional monitoring type first-aid kit system for vital signs. An electronic stethoscope monitors auscultation signals of auscultation parts of a patient; the camera device shoots a wound part image of the patient; an inspiration pressure sensor and an inspiration flow sensor respectively monitor the inspiration pressure and the inspiration flow of the patient; the expiration pressure sensor and the expiration flow sensor are used for monitoring the expiration pressure and the expiration flow of the patient respectively; the controller receives the inspiration pressure, the inspiration flow, the expiration pressure, the expiration flow, the auscultation signal and the trauma part image, preprocesses the auscultation signal and extracts the characteristics to obtain corresponding sound characteristics, and processes the trauma part image to obtain a corresponding trauma part and trauma characteristics; the inspiration air pressure, the inspiration flow, the expiration air pressure, the expiration flow, the sound characteristics, the wound part and the wound characteristics form a vital sign vector, the vital sign vector is input into a target first-aid model to be analyzed, the wound condition and the first-aid scheme of the patient are analyzed, and the sound production device is controlled to broadcast the first-aid scheme.

The invention provides a metabolism detection device and method based on an adjustable mixing tank. The metabolism detection device is composed of a human body breathing gas collection module, an expired gas concentration detection module, a calibration gas supply module, an electromagnetic valve switching module, a control module and a computer. The human body breathing gas collecting module is used for separating breathing gas, providing a breathing channel, detecting the expiration flow and collecting and physically averaging the gas; the expired gas concentration detection module is used for detecting oxygen and carbon dioxide concentrations of gas to be detected; the calibration gas supply module provides calibration gas; the electromagnetic valve switching module provides gas switching selection; the control module is responsible for controlling each component and acquiring signals; and the computer is responsible for data processing, index calculation and result display. The detection method comprises the following steps: firstly calibrating the concentration, then carrying out a motion or resting metabolism test based on spontaneous respiration, and finally calculating the metabolism index according to the measured gas concentration and flow data. The method can be applied to metabolism detection scenes of resting and different exercise intensities, and is reliable in test and simple in engineering realization.

The invention discloses a progressive exercise vital capacity training device, and relates to the technical field of vital capacity training, the progressive exercise vital capacity training device comprises an L-shaped support plate and a plurality of vertical cylinders, the vertical cylinders are uniformly distributed at the upper end of the L-shaped support plate, one side of the L-shaped support plate is fixedly provided with an air guide pipe, one end of the air guide pipe is in threaded connection with a respirator, and the other end of the air guide pipe is in threaded connection with the respirator. The device further comprises a pushing mechanism, an air flow adjusting mechanism and a collecting mechanism, the pushing mechanism is arranged above the L-shaped supporting plate, the air flow adjusting mechanism is arranged on the outer side of the air guide pipe, and the collecting mechanism is arranged at the lower end of the L-shaped supporting plate. According to the vital capacity training device, the pushing mechanism is arranged, the upward moving difficulty of the pushing plate can be gradually increased by additionally arranging a balancing weight, trainees can conveniently conduct vital capacity training with different difficulties according to self requirements, the expiration flow adjusting mechanism is arranged, the expiration flow adjusting requirement in unit time during training is met, the expiration time of the trainees is conveniently recorded, and the training efficiency is improved. And the method has good universality.

The application discloses a kind of based on multi-source data fusion expiratory nitric oxide detection method, system and equipment.Belong to medical detection technical field.It includes: using phased multitask learning framework, utilize standard gas data training model to master the basic nonlinear response of sensor and environmental cross sensitivity;Then, the clinical expiratory real sample data are fused, and the model is consolidated physical law while learning the ability to suppress complex expiratory matrix effect and individual difference interference by multitask learning.Training completed lightweight artificial intelligence correction model is deployed in embedded microprocessor, and can carry out integrated intelligent correction to real-time acquisition sensor signal, environmental temperature and humidity and expiratory flow.The application breaks through the performance limit of commercial sensor, realizes the sub-ppb level ultra-sensitive detection of expiratory nitric oxide and high clinical consistency output, and has strong environmental robustness, provides low-cost, high-precision and reliable solution for primary medical care and family health monitoring.

An embodiment includes use of a predictive model to ascertain a likelihood of a patient having expiratory flow limitation (EFL) to adjust the application of ventilator-based therapy. An embodiment may operate one or more predictive model on patient data alone to obtain a prediction of EFL for the patient, avoiding a need to perform invasive or ventilator based EFL detection, e.g., via a forced oscillation technique (FOT). An embodiment may be used in a system or method that adjusts ventilator settings for respiratory therapy, for example to abolish detected EFL in a patient having a positive classification for EFL.

This invention discloses a respiratory guidance device and its control method and system, relating to the field of medical device technology. The device includes a gas supply unit, a disposable lip-holding tube, an exhalation detection module, and a feedback module. The lip-holding tube has a middle lip-holding section with a breathing port. When the patient is in working condition, they hold this lip-holding section with their lips, the breathing port being located between the lips and outside the teeth, allowing the upper and lower teeth to close normally, achieving natural swallowing without stress on the masseter muscle. The gas supply unit provides a constant flow of clean gas, the exhalation detection module collects the patient's expiratory flow rate in real time, and the feedback module provides guidance prompts based on the expiratory status, helping the patient adjust to the correct oral breathing mode in real time. This invention, through its unique lip-holding tube design and intelligent feedback guidance, fundamentally solves the problem of nasal exhalation causing endoscope fogging during endoscopic examinations, significantly improving patient comfort and compliance, and can be extended to scenarios such as nebulizer therapy and postoperative monitoring.

The utility model discloses a direct suction negative oxygen ion generating device with a breathing machine function, which comprises a breathing mask in contact with the face, the breathing mask is connected with a Y-shaped connecting pipe, the upper end of the Y-shaped connecting pipe penetrates through the breathing mask to be communicated with the oral cavity of a patient, and the lower end of the Y-shaped connecting pipe is connected with the breathing mask. The lower end of the Y-shaped connecting pipe is fixedly connected with the upper end of the inspiration channel and the upper end of the expiration channel. Gas in the expiration channel is discharged to the surrounding environment through the water removal bottle, the expiration pressure sensor, the expiration control valve, the expiration flow sensor and the check valve. A negative oxygen ion generating device is arranged at the tail end of the inspiration channel, and negative oxygen ions generated by the negative oxygen ion generating device enter a Y-shaped connecting pipe through an overpressure protector, an inspiration flow sensor, an inspiration control valve, an inspiration pressure sensor and a temperature controller and are input into an airway and pulmonary alveoli of a patient; a certain amount of negative oxygen ions are generated at the input end of the breathing machine, and the negative oxygen ions can further promote rehabilitation of a patient.