15 results about "Inspiratory flow" patented technology

The embodiment of the invention provides a breathing machine inspiration detection method and device and a computer readable storage medium, and the method comprises the steps: collecting first pressure data and first flow data in a current breathing period, and calculating a target flow baseline according to the first pressure data, the first flow data and a preset fitting formula; calculating a virtual traffic baseline according to the target traffic baseline and the first traffic data; if it is judged that the inspiration triggering state is not reached or the virtual inspiration flow change rate in the inspiration triggering state is smaller than a preset flow change threshold value, second pressure data and second flow data of the next respiratory cycle are continuously collected, and the virtual inspiration flow change rate is calculated; and judging that inspiration is detected until the detected virtual inspiration flow change rate is greater than or equal to the preset flow change threshold value. According to the invention, the phenomena of inspiration detection delay, group delay and the like can be avoided, the difference between detected inspiration and actual inspiration is reduced, and the sensitivity of inspiration detection is improved.

A mechanical ventilation system comprises a plurality of ventilation therapy sub-systems. Each of the ventilation therapy sub-systems is adapted to assist a respiratory function of the patient. The system also comprises a detector of the respiratory drive of the patient, an operator interface receiving one or more control parameters, and a main controller. The main controller assigns a therapeutic contribution to each of the ventilation therapy sub-systems based on the respiratory drive of the patient and on the control parameters. The controller modulates the respiratory drive of a patient by controlling each of the plurality of the ventilation therapy sub-systems according to its assigned therapeutic contribution. Distinct ventilation therapy sub-systems may apply negative pressure on the abdomen of the patient, deliver a non-pressurizing inspiratory flow to the patient, or induce a positive pressure in the airways of the patient.

The application discloses a combustion mode-based metabolite testing device and method. The metabolite testing device comprises a combustion control module, a respiratory gas flow control module, an exhaled gas heating and humidifying control module, a respiratory gas separation module, a control unit and a computer. The combustion control module is used for simulating human exhaled gas; the respiratory gas flow control module is used for simulating human respiratory flow; the exhaled gas heating and humidifying control module is used for simulating the temperature and humidity state of human exhaled gas; and the respiratory gas separation module is used for simulating the human mouth and nose breathing process. The control unit is responsible for the control of motors and valves, and the computer is responsible for data acquisition, calculation analysis and result display. The testing method is to set human metabolic parameters, connect a human metabolic tester and test, and finally perform quality inspection analysis on the metabolic parameters of the human metabolic tester according to the test result. The application can be applied to the application scene of human metabolic tester accuracy evaluation, and realizes easy, economical and effective verification of the human metabolic tester.

The invention provides a quantitative aerosol inhalation system, which comprises a mouthpiece, a tee joint, a filter, an atomization device, an electromagnetic valve and a one-way valve, and is characterized in that the system is arranged in the tee joint, when a user exhales from the mouthpiece, the one-way valve is opened, airflow flows out of the filter through the one-way valve, when the user inhales, the one-way valve is closed, and the user can only inhale gas flowing in from the atomization device; and the control module is used for receiving the gas pressure value detected by the pressure detection element and controlling the action of the electromagnetic valve according to the gas pressure value. By means of the quantitative aerosol inhalation system, it can be ensured that aerosol administration is conducted on each patient under the optimal inhalation flow, once the inhalation flow is lower than the optimal flow range, administration is stopped immediately, and the accuracy of aerosol administration is greatly improved; meanwhile, the unique one-way valve design is adopted, and cross infection is eradicated; the dosing dosage can be automatically calculated, so that different dosing dosages can be generated by using a single concentration, and the gallipot does not need to be frequently replaced.

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.

This invention relates to the field of machine-to-machine communication technology, specifically to an edge communication control method for a medical oxygen generation system. It tracks the inspiratory flow velocity trajectory to construct ventilation rhythm segments, calculates time offsets by combining chest cavity displacement responses, analyzes the offset evolution trend to screen for asynchronous cycles with increasing amplitude, synchronously monitors the flow velocity rise pattern to identify abrupt changes such as trend interruptions, configures oxygen supply actions for cycles exhibiting both asynchronous and abrupt characteristics, and integrates control commands to obtain an edge communication cycle control configuration set. This invention constructs rhythm intervals and multi-dimensional temporal mapping relationships using dual-channel data of inspiratory flow velocity and chest cavity displacement, tracks fluctuation evolution across cycles to doubly screen asynchronous responses and flow velocity abrupt changes, incorporates time offsets and synchronization states into the edge communication configuration by combining oxygen supply action insertion logic, and establishes a mechanism corresponding to rhythm numbers and status labels to achieve precise oxygen supply timing linkage matching and command control.

The present disclosure relates to a filtration apparatus for filtering liquid from a gas, the apparatus having a first housing having a gas inlet and a gas outlet, a first filter medium disposed in the first housing, a second filter medium disposed in the housing, and a second housing forming a first collection trough disposed in a flow path between the first filter medium and the second filter medium, thereby defining a path for gas to flow from the inlet, through the first filter medium, past the collection trough, through the second filter medium, and to the outlet. The present disclosure also relates to a method of passing a gas through a coalescing filter medium and through a hydrophobic filter medium.

A device (100) for providing oxygen to a patient for inhalation, the device comprising: a first sensor (24) for determining an inspiratory flow rate of the patient; a second sensor (50) for measuring the blood oxygen saturation of the patient; at least one mass flow controller and associated valve (26) operable to adjust the flow rate and control the duration of the oxygen pulse provided from the device to the patient; and a controller (22) configured to repeatedly and adjustably: initiate opening of the valve to release a pulse of oxygen for inhalation by a patient; adjusting a flow rate of an oxygen pulse through a mass flow controller based on the inspiratory flow rate; and controlling the duration of the oxygen pulse by closing the valve based on the oxyhemoglobin saturation. A method of using such a device to provide oxygen to a patient for inhalation is also provided.

The invention discloses a sleep hypopnea type automatic discrimination method and system based on a multi-modal signal, and aims to solve the technical bottlenecks of strong subjectivity, poor consistency and limited single signal feature discrimination capability of the existing visual scoring method. The method comprises the following steps: collecting multi-modal signals in a polysleep pattern (PSG), wherein the multi-modal signals comprise nasal ventilation airflow, thoracico-abdominal breathing movement, blood oxygen saturation and other signals; extracting multi-dimensional features related to hypopnea typing, wherein the multi-dimensional features comprise an inspiration flow limited index, thoracico-abdominal movement coordination, an event termination mode, an awakening sequential relationship and a sleep stage associated feature; the features are fused and optimized based on a machine learning algorithm, a high-precision classification model is constructed, and automatic discrimination of obstructive and central hypoventilation is realized. According to the method, the key problems that a traditional method depends on manpower in hypopnea typing, feature utilization is not comprehensive, and judgment precision is insufficient are solved, and a reliable basis is provided for accurate diagnosis, typing and treatment strategy formulation of sleep breathing disorder.

Architectures for production of nitric oxide (NO) include systems and methods for generating NO having one or more plasma chambers configured to ionize a reactant gas to generate a plasma for producing a product gas containing NO using a flow of the reactant gas through one or more plasma chambers; a controller configured to regulate the amount of nitric oxide in the product gas using one or more parameters as an input to the controller, one or more parameters including information from a plurality of sensors configured to collect information relating to at least one of the reactant gas, the product gas, and a medical gas into which product gas flows; and a flow divider configured to divide a product gas flow from the plasma chamber into a first product gas flow to provide a variable flow to a patient inspiratory flow and a second product gas flow.

Modular respiratory device (1) for the diagnosis and treatment of a patient's respiratory problems, comprising a diagnostic module (2) with a housing (5), wherein a mainboard (6) is arranged inside the housing (5) and is connected to a screen (8) arranged in an outer wall (7) of the housing (5), a measuring module (3) with a flow channel (10) for guiding the patient's expiratory and / or inspiratory air, wherein the measuring module (3) is detachably coupled to the diagnostic module (2) and the measuring module (3) and / or the main board (6) have at least one sensor for measuring a flow rate or pressure of the expiratory and / or inspiratory air, wherein the at least one sensor is connected to the main board (6), a computing unit arranged on the mainboard (6) and designed to evaluate and process the measured values, wherein the processed values ​​can be displayed on the screen (8), a therapy module (4) with a second flow channel (18) for guiding the patient's expiratory and / or inspiratory air, which is detachably coupled to the diagnostic module (2), wherein the flow channel (10) of the measuring module (3) is fluidly connected to the second flow channel (18) of the therapy module (4) and the therapy module (4) has a control element (19, 25) for changing a process variable of the therapy module (4), wherein the control element (19, 25) can be controlled by means of the computing unit.

This invention relates to the field of neurophysiological signal acquisition technology, and proposes an olfactory evoked potential acquisition system and method based on respiratory gas flow triggering. The system includes preprocessing the acquired inspiratory flow signal, identifying the inspiratory signal, and determining a valid inspiratory event when the inspiratory flow value, inspiratory flow rate of change, inspiratory duration, and local inspiratory integral value simultaneously meet preset conditions. A labeling signal is then sent to the EEG acquisition device to obtain a labeled event. For each labeled event's time node, waveforms within a set time period before and after the obtained EEG signal are extracted. The waveforms extracted from all labeled events are then superimposed and averaged to obtain the olfactory evoked potential signal waveform. This invention constructs a closed-loop triggered olfactory evoked potential acquisition architecture based on real inspiratory behavior, achieving precise synchronization between stimulus input and EEG labeling.

Methods and apparatus involve generation of an anti-infection therapy. The method / apparatus may include a controller controlling setting of a respiratory flow therapy device for the therapy. The controller may compute a target flow rate profile for a patient using a margin function, such that the target flow rate profile, according to the margin function, exceeds a minimum inspiratory flow rate profile of the patient's inspiration. The controller may control setting the respiratory flow therapy device to generate a flow of air to a patient interface according to the target flow rate profile, where the generation may be in synchrony with a sensed parameter that is indicative of a breathing cycle of the patient.

The invention discloses a clinical anesthesiology department medicine supply anesthesia device which comprises an air blower, an outlet of the air blower is connected with an inspiration check valve in a penetrating mode, one end of the inspiration check valve is connected with an expiration check valve in a penetrating mode, and an anesthetic gas output end is connected between the inspiration check valve and the expiration check valve in a penetrating mode. One end of the expiration check valve is connected with a soda lime tank in a penetrating mode, one end of the soda lime tank is connected with an inlet of an air blower in a penetrating mode, an outlet of the air blower is further connected with a first throttling valve in a penetrating mode, a mixing device is arranged at one end of the first throttling valve, and one end of the mixing device is connected with a fresh gas supply end in a penetrating mode. The fresh gas supply end is in through connection with a second throttling valve, the mixing device is in through connection with the soda lime tank, one end of the suction check valve is in through connection with a suction flow sensor, and the device solves the problem of poor practicability at present.