747 results about "Exhalation" patented technology

The invention belongs to the technical field of intelligent rehabilitation equipment control, and relates to a multi-parameter feedback regulation and control method for postoperative lung function rehabilitation training, which comprises the following steps: acquiring an electrocardiosignal, a respiration signal and a limb movement signal of a patient; identifying a heart rate fluctuation form of the electrocardiosignal to generate an abnormal fluctuation time period, and analyzing a time difference between an inspiration phase and an expiration phase of the respiratory signal to generate a starting point of respiratory rhythm disorder; judging a cardiopulmonary risk level; the exercise intensity of rehabilitation training equipment is automatically adjusted based on the cardiopulmonary risk level, and meanwhile a regulation and control mode is dynamically selected according to the proportion change of the chest fluctuation amplitude and the abdomen fluctuation amplitude; when the heart rate recovery rate is lower than a preset reference and the respiratory rhythm stabilization time exceeds a critical value, gradually improving the exercise intensity; calculating a motion intensity correction coefficient and triggering a motion posture correction instruction; and generating a rating report containing the cardiopulmonary function fitness. According to the invention, the problem of lack of comprehensive quantitative evaluation of rehabilitation efficiency in the prior art is solved.

Disclosed herein is a medical system (100, 400) comprising: a magnetic resonance imaging system (102) configured for providing a respiratory signal. The respiratory signal is descriptive of a respiratory position as well as of inhalation and exhalation of the subject. The execution of machine executable instructions (140) causes the computational system to repeatedly: perform (200) the individual acquisition of k-space data using the magnetic resonance imaging system; receive (202) the respiratory signal; bin (204) the individually acquired k-space data into one of a predetermined number of k-space bins (148) using the respiratory signal and perform outlier rejection. Execution of the machine executable instructions further causes the computational system to reconstruct (208) a magnetic resonance image for each of the predetermined number of k-space bins to provide a respiratory-state resolved magnetic resonance image (150).

The invention relates to the field of anesthetic concentration regulation and control, in particular to a method for analyzing and evaluating the administration concentration of an inhalation type anesthetic. The method comprises the following steps: firstly, according to characteristic data such as basic physiological data, previous anesthesia sensitivity and operation information of a patient, applying a fuzzy matching algorithm to obtain an initial administration concentration; physiological sign data such as blood pressure, heart rate, pulse oxyhemoglobin saturation and end-expiratory carbon dioxide partial pressure of the patient are monitored in real time in the anesthesia process and compared with a normal range, whether the physiological sign data are abnormal or not is judged, and an adjustment scheme of the administration concentration is determined according to the administration concentration-physiological sign correlation model; after the administration concentration is adjusted, the electroencephalogram double-frequency index is monitored to evaluate the anesthesia depth, the anesthesia depth matching degree is analyzed to judge the adjustment effect, and therefore closed-loop control over the anesthetic administration concentration is achieved. According to the method, the administration concentration can be accurately regulated and controlled, the concentration regulation mechanism is optimized, the safety and effectiveness of the anesthesia process are effectively improved, and a reliable guarantee is provided for clinical anesthesia.

The invention relates to the technical field of atomization rate control, in particular to an intelligent atomization compliance monitoring method and system for children. The method comprises the following steps: firstly, acquiring expiration flow velocity, inspiration flow velocity and multi-direction motion acceleration time sequence data of a child in a historical monitoring period, and reflecting breathing and behavior action conditions; dynamically analyzing the numerical characteristics of the expiration flow velocity and the inspiration flow velocity to divide a respiratory cycle, and analyzing the cycle length, the inspiration flow velocity cumulant and the like to construct a respiratory characteristic vector; screening a target monitoring period based on the breathing feature vector and the period number similarity; further analyzing the motion acceleration change and accumulation characteristics in the target monitoring period, and quantifying the behavior compliance expression degree; the behavior compliance expression degree and the breathing feature vector are deeply fused, a'breathing state-behavior cooperation 'joint evaluation model is established, the breathing and behavior states of children are dynamically recognized, the medicine atomization rate is accurately adjusted, and effective deposition of lung medicine is improved.

The utility model discloses a breathing synchronous following oxygen supply nasal oxygen cannula, it includes main tube, control subassembly, branch tube and nasal tip, the control subassembly includes shell, valve body and oxygen supply subassembly, oxygen supply subassembly is equipped with first air chamber and second air chamber inside, first air chamber and second air chamber are equipped with air control subassembly inside, the first air chamber and second air chamber are equipped with air control subassembly inside. A trigger gas path, an oxygen inlet gas path and a pressure maintaining gas path are arranged in the control assembly, an oxygen supply gas path is arranged in the valve body, the gas control assembly controls the first vent hole, the oxygen inlet gas path and the oxygen supply gas path to be opened during inspiration, and the gas control assembly controls the first vent hole to be closed during expiration. According to the nasal oxygen cannula, the breathing synchronous following oxygen supply function is achieved, the oxygen inhalation comfort of a patient is improved, oxygen resources are greatly saved, waste is reduced, and practicability is high.

The utility model relates to the technical field of equipment testing, in particular to a passive following type respirator testing device and system.The device comprises a respiration simulation assembly provided with a passive following type respirator; the muscle simulation assembly is connected with the respiration simulation assembly and used for driving the respiration simulation assembly to move and simulating the expiration and inspiration exchange process of the human body based on the movement of the respiration simulation assembly; and the upper computer is communicated with the muscle simulation assembly and is used for inputting a test instruction to enable the muscle simulation assembly to move and outputting a test result of the passive following type respirator according to the test data of the passive following type respirator. Therefore, the problem that the test accuracy is low due to the fact that the simulated lung lacks a power source and the spontaneous respiration state of human muscles cannot be simulated in the prior art is solved.

The invention relates to a breathing pipeline adapter capable of adjusting the air displacement and a breathing nasal mask.The breathing pipeline adapter comprises a tubular body, a through airflow channel is formed in the tubular body, the tubular body is provided with a first end and a second end, the first end is used for being connected with nasal masks of different models, and the second end is used for being connected with an external breathing pipeline; the exhalation hole group comprises a plurality of exhalation holes, and the multiple exhalation holes are uniformly formed in the circumferential outer wall of the tubular body in an annular array mode and directly communicate with the airflow channel; the adjusting knob is coaxially arranged on the outer side of the tubular body in a sleeving mode, and a through hole is formed in the adjusting knob; the through holes can be aligned with or staggered with different numbers of exhalation holes, and the air displacement of the airflow channel is adjusted. According to the breathing nasal mask, the exhaust area can be adjusted, exhaled air can be exhausted out of the nasal mask more effectively, for a patient with a large amount of exhaled air, the effective exhaust area can be increased, the exhaled air can be exhausted in time, accumulation of the exhaled air in the nasal mask is avoided, and therefore the relapse phenomenon is reduced.

The invention provides a radiotherapy abdominal pressure plate device capable of monitoring abdominal external pressure in real time, and the device comprises a thermoplastic film which is provided with a fastener; the abdominal pressure plate body is fixedly connected to one side of the thermoplastic body film; the pressurizing air bags are distributed on the abdominal pressure plate in an array mode, air inlet valves are arranged on air inlet pipelines of the pressurizing air bags, exhaust valves are arranged on exhaust pipelines of the pressurizing air bags, and air pressure sensors are arranged in the pressurizing air bags; a thin film pressure sensor; the control module is used for judging whether the patient is in an inspiration phase or an expiration phase in real time according to numerical values detected by the multiple thin film pressure sensors, and controlling the air inlet valves or the exhaust valves on the corresponding pressurizing air bags to be opened so as to adjust radiotherapy pressure; and judging the pressure difference according to the detection values of the air pressure sensors on the two adjacent pressurizing air bags and carrying out cooperative compensation. By means of detection of the thin film pressure sensor and the air pressure sensor, the breathing phase is dynamically recognized, pressure is actively released in the inspiration phase, pressure is compensated in the expiration phase, and the displacement error of the target area can be controlled to be smaller than or equal to 2 mm.

The invention belongs to the technical field of medicine, and particularly relates to a method and application for evaluating the respiratory muscle movement function of an IPF patient based on dynamic MRI. Performing dynamic MRI processing on the to-be-tested person to obtain a lung dynamic MRI image; manually marking and segmenting an end-expiratory image and an end-inspiratory image on the lung dynamic MRI image along the inner edge of the thoracic cavity outline, and checking and correcting; obtaining evaluation parameters of chest wall movement and evaluation parameters of diaphragm movement and form by using the images; measuring parameters are analyzed, and the pulmonary fibrosis degree and pulmonary vessel and chest wall muscle parameters of the HRCT image are quantified; and comparing and statistically analyzing the parameters of different to-be-tested persons so as to evaluate the respiratory muscle movement function of the IPF patient. The dynamic MRI technology is adopted, and a quantitative basis is provided for evaluating the respiratory muscle dysfunction and severity of the IPF patient.

The present application relates to a kind of respiratory synchronous diaphragm nerve electric stimulator in vitro, belong to medical equipment technical field.The technical scheme of a kind of diaphragm nerve electric stimulation based on real-time breathing signal synchronization trigger is proposed for the problems of high weaning failure rate and quality of life decline caused by VIDD.The technical scheme points include: detecting inspiration negative pressure signal through nasal cavity air pressure sampling tube, control unit dynamically adjusts trigger threshold according to negative pressure signal, when negative pressure is lower than preset value and waveform slope meets the standard, trigger electric stimulation module to output biphasic pulse, pulse parameters include positive and negative alternating waveform, width 0.1ms to 1ms, frequency 10Hz to 50Hz and current intensity 5mA to 30mA, and strictly limit electric stimulation to be only output in inspiration cycle, and expiration cycle is completely blocked stimulation by hardware switch circuit.It is mainly suitable for intensive care and rehabilitation therapy scene, effectively prevent and treat VIDD, improve patient weaning success rate and quality of life.

The present disclosure provides embodiments of a personal protective device which include one or more sensors. The personal protective device is in the form factor of a filtered mask to cover the nose and the mouth of the subject when in use. One or more sensor modules are connected to the mask for detecting one or more parameters related to an inhalation and or exhalation of the subject. The mask is held onto the face of the subject by one or more support members.

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.

There is provided a device for measuring a person's ventilation including oxygen consumption. The device includes a sensor assembly. The device includes a breathing conduit through which at least one exhalation is received. The device includes a dehumidification cartridge configured to receive a sample amount of said exhalation from the breathing conduit, dehumidify the sample amount of said exhalation, and direct the sample amount of said exhalation so dehumidified to the sensor assembly. The dehumidification cartridge includes a dehumidification conduit having a proximal end at said sensor sampling port and which extends from the sensor sampling port towards the sensor assembly. The dehumidification cartridge includes a dehumidification chamber enclosing the dehumidification conduit. The dehumidification chamber is shaped to promote a flow of air therethrough. The dehumidification cartridge is shaped to facilitate for sanitary purposes, periodic replacement of either or both of the replaceable dehumidification cartridge and the dehumidification conduit thereof.

The invention belongs to the technical field of medical instruments. In order to solve the problems that an existing lung function detection device is low in detection result accuracy and cannot detect parameters such as the residual gas amount, the device for assisting in detecting the lung function of the chronic obstructive pulmonary disease patient is provided and comprises a detection device, a helium bottle, a sealing mask, a nose clip, an air suction pipe, an air outlet pipe, a sealing unit and a plugging switching mechanism; one end of the air suction pipe is connected with the helium tank, and the other end is connected with the plugging switching mechanism; one end of the air outlet pipe is connected with the detection device, and the other end is connected with the plugging switching mechanism; the nose clip is arranged at the upper end of the sealing mask. According to the embodiment of the invention, a subject cannot inhale external air and cannot exhale in-vivo air from the nasal cavity through the nasal clip, and the plugging switching mechanism can thoroughly open the pipe orifice of the air outlet pipe or the air inlet pipe, so that the subject can inhale or exhale easily, the detection accuracy is high, and the detection efficiency is high. And the method can be combined with a closed helium dilution method to obtain parameters such as residual gas amount.

The invention discloses an atomization machine for adjuvant therapy of children cough, and relates to the technical field of atomization therapy, the atomization machine comprises a main machine, an atomization cup, a respiration adjusting assembly and a respiration piece, the atomization cup is provided with a mist outlet pipe, the respiration piece is installed at the tail end of the mist outlet pipe, and the respiration adjusting assembly is installed between the respiration piece and the mist outlet pipe; the breathing adjusting assembly comprises an adjusting and controlling part and a flow guiding part, an airflow sensor used for monitoring the breathing direction and the airflow quantity and a flow guiding blade used for guiding the airflow direction are arranged in the flow guiding part, adjusting and controlling blades used for adjusting and controlling the inspiration resistance are arranged in the adjusting and controlling part, and the adjusting and controlling blades can adjust the shape according to signals fed back by the airflow sensor. Therefore, the breathing resistance is increased or reduced. The breathing state is monitored through the air flow sensor, the resistance is dynamically adjusted through the breathing adjusting assembly, a child is guided to form a slow and deep standard atomization breathing rhythm in cooperation with seeing and hearing of the display screen, turbulent flow is avoided through the flow guide blades, fog particles are pushed to directly reach the lung, and meanwhile expired air is prevented from polluting medicine liquid.

A combined system of a concealed closed tracheoscope and an artificial airway breathing circuit includes an artificial airway breathing tubing and a tracheoscope. The artificial airway breathing tubing includes an inhalation circuit and an exhalation circuit that are connected through a connecting tube. The tracheoscope includes a handle portion and an insertion portion connected to the handle portion. The tracheoscope handle portion wraps around a section of the exhalation circuit. The tracheoscope insertion portion is hidden in the extendable breathing circuit, which extends and retracts to make the tracheoscope insertion portion advance or retreat in a closed condition. The tracheoscope handle function assembly cleverly wraps around the surface of the breathing circuit tubing, organically combining the functions of the tracheoscope handle and the breathing circuit. Meanwhile, the tube interface can be cleaned to keep the tracheoscope clean and unobstructed, such that the service life of the tracheoscope can be extended.

The invention relates to the technical field of atomizers, and particularly discloses a pediatric medical emergency atomizer which comprises a compressor body and an atomizing cup. The two sides of the breathing mask are respectively and fixedly connected with a bandage; the medical emergency atomizer for the department of pediatrics comprises a breathing mask, two bandages, a wearing mechanism, an expiration frequency monitoring mechanism and an atomization rate regulating and controlling mechanism, the wearing mechanism is connected with the two bandages, the expiration frequency monitoring mechanism is connected with the wearing mechanism, and according to the medical emergency atomizer for the department of pediatrics, the breathing mask is worn on the face of a patient through the wearing mechanism; if the breathing frequency of the child patient is rapid, airflow exhaled by the child patient impacts the breathing mask at the moment, the bandage is pulled when the breathing mask is impacted by the airflow, the expiration frequency monitoring mechanism is triggered through the bandage, and the atomization rate regulation and control mechanism is controlled to work according to the rapid expiration degree of the child patient; the atomization rate regulation and control mechanism regulates the flow amount of high-speed airflow entering the atomization cup from the connecting guide pipe.

Disclosed is a breathing adjustment apparatus, comprising: a body provided with a breathing channel, the body being of a hollow tubular structure; a first opening disposed at one end of the body and configured to be inserted into the mouth of a user; a second opening in communication with the first opening, wherein the second opening is disposed at the other end of the body and configured for exhalation; and an inner core housed within the body for providing a breathing resistance; wherein air enters the body through the first opening and reaches the second opening through the inner core.

A filtering facepiece respirator is provided. The filtering facepiece respirator includes a facemask adapted to fit over the nose and mouth of a wearer, where the facemask comprises a mask body containing a filtering structure. A harness is coupled to the mask body for securing the facemask on the face of the wearer, and a mechanical valve is coupled to a portion of the mask body proximate the wearer's mouth. The valve may be adjusted between a first mode of operation and a second mode of operation, where in the first mode of operation is permitted to flow through the valve on exhalation but not on inhalation and in the second mode of operation air is obstructed from flowing through the valve on exhalation and inhalation. There is an optional third mode of operation where air is permitted to flow through the valve on inhalation and exhalation.

The invention relates to the technical field of medical monitoring, in particular to a patient cardiopulmonary function monitoring system and method and a computer readable storage medium, the monitoring system comprises a breathing machine, a pulmonary membrane oxygenation device, a first monitoring module and a second monitoring module, and the breathing machine comprises a breathing circuit, a processing module and a display module; the pulmonary membrane oxygenation equipment comprises an oxygenator; the first monitoring module is used for monitoring carbon dioxide exhaling parameters in gas exhaled by a patient in real time; the second monitoring module is used for monitoring carbon dioxide discharge parameters in gas discharged by the oxygenator in real time. By means of real-time monitoring of exhaling parameters of carbon dioxide in gas exhaled by a patient and discharging parameters of carbon dioxide in gas discharged by an oxygenator, continuous monitoring of the change condition of the cardiac function and / or the lung function of the patient is achieved, oxygen consumption of the patient can be truly reflected, parameter adjustment of a breathing machine and lung membrane oxygenation equipment is facilitated, and the patient experience is improved. And guidance is provided for turning of the pulmonary membrane oxygenation equipment.

The invention provides a method and equipment for constructing lung function characteristics during sleep. The method is applied to lung function data processing. The method comprises the following steps: collecting a breathing velocity waveform of a target object; determining an inspiration stage and an expiration stage in each respiratory cycle based on the respiratory velocity waveform; the duration of each stage is determined based on the inspiration stage and the expiration stage, and the duration of the inspiration sub-stage and the duration of the expiration sub-stage are obtained; basic features, a stability measurement feature group and a comprehensive feature group are calculated based on the inspiration sub-stage duration and the expiration sub-stage duration; according to the method, the breathing speed waveform is acquired without burden, and the comprehensive lung function evaluation feature group suitable for the radar breathing waveform is constructed.

The present invention relates to the technical field of medical devices, and specifically to a medical anesthesia machine capable of preventing anesthetic reflux. The present invention comprises: a main body mechanism, a drug filling mechanism and a mask mechanism. The main body mechanism comprises a columnar shell and a support frame. An anti-skid column is fixedly installed on the top of the columnar shell, an anesthetic treatment medicine tube is installed on the anti-skid column, an anesthetic treatment medicine tube is fixedly connected to the inner wall of the anesthetic treatment medicine tube with an anesthetic evaporator, and a sealing plug is slidably embedded between the anesthetic treatment medicine tube and the anesthetic evaporator. During the atomization anesthesia process, the present invention can coordinate the operation of various components of the device through an automated control system according to the patient's inhalation and exhalation states, push the atomized anesthetic gas to be delivered to the mask for the patient to inhale during inhalation, stop the delivery in time and close the corresponding passage during exhalation, so that the anesthetic delivery is synchronized with the patient's breathing, which not only ensures the anesthesia effect but also greatly reduces the possibility of anesthetic reflux caused by reverse pressure difference.

The invention provides a breathing mask which is matched with the mouth or / and nose of a user to provide breathing airflow for a breathing device, the breathing mask comprises a main body, an expiration one-way valve, an inspiration one-way valve and a sealing piece, and the main body is provided with a first opening and a second opening; the expiration one-way valve is arranged in the first opening and comprises a first valve clack and a first stop block, the first valve clack is close to the exterior of the main body, the first stop block is close to the interior of the main body, and the expiration one-way valve is used for allowing expired air to flow out of the main body in one direction through the first opening; the air suction one-way valve is arranged in the second opening and comprises a second valve clack and a second check block, the second valve clack is close to the interior of the body, the second check block is close to the exterior of the body, and the air suction one-way valve is used for allowing external air to unidirectionally flow into the body through the second opening; the sealing member selectively seals the first opening or the second opening. By means of the breathing mask, expiration training and inspiration training can be achieved, and ventilation can be achieved easily.

The present invention provides a training device for training the respiratory muscle group. 【Solution means】In one embodiment, the device includes a hood body 30 covered at a position on the face of the user 9 with respect to the intake and outlet of air. The hood body is provided with an air flow adjustment element 31 for setting the intake resistance, which simulates the occlusion of the airway during the user's inhalation process and brings negative pressure to the airway. The device is used to execute a training step that enables the user to achieve training reference information related to the respiratory function by performing at least one inhalation or exhalation movement under the intake resistance.

According to an example, there may be provided a method for classifying a carbon dioxide oscillogram, the method comprising obtaining a respiratory waveform from a carbon dioxide oscillogram, determining one or more turning points of the respiratory waveform, where the turning points include: a delta turning point between an expiratory baseline and an expiratory ascending branch, a gamma turning point between the inspiration descending branch and the inspiration base line, and an alpha turning point between the expiration ascending branch and the expiration platform; extracting the characteristics of the breathing waveform by using the turning point; and applying a trained machine learning model to the extracted features, where the trained machine learning model is configured to output a classification of the carbon dioxide oscillogram according to the features.

The invention relates to a breathing machine, a pressure and tidal volume adjusting method, device and equipment thereof and a medium, and the method comprises the steps that the carbon dioxide concentration of the expiration tail end of a patient is obtained; determining a pressure compensation value of the breathing machine according to the carbon dioxide concentration and a preset carbon dioxide concentration threshold value; real-time pressure of the breathing machine is obtained, and a target pressure value is obtained based on the pressure compensation value and the real-time pressure; calculating a target tidal volume according to the target pressure value; and adjusting the pressure and tidal volume of the breathing machine based on the target pressure value and the target tidal volume. In the whole process, the pressure and the tidal volume of the breathing machine are compensated / adjusted based on the carbon dioxide concentration of the exhalation tail end of the patient, the breathing machine can continuously and stably provide appropriate pressure and tidal volume support according to the actual exhalation carbon dioxide concentration of the patient, and stable adjustment of the pressure and the tidal volume of the breathing machine is achieved.

The invention relates to the technical field of auxiliary medical treatment, in particular to an oxygen generator on-demand pulse oxygen supply control method based on respiratory rhythm perception, and the method comprises the steps: obtaining a plurality of respiratory pressure sequences, and dividing the respiratory pressure sequences into an expiratory phase and an end-expiratory transition section; determining a signal confidence coefficient according to the performance of the expiratory phase and the end-expiratory transition section in the respiratory pressure sequence; a regularization item of physiological rationality constraint is introduced into the regression loss function, and time sequence smooth constraint is applied to a model cell state updating process to obtain an optimized respiratory rhythm prediction model; taking the three-dimensional feature vector as input data of a respiratory rhythm prediction model to obtain an end-expiratory stationary section duration ratio of a next respiratory cycle; and determining a pre-judgment window period from the beginning of inspiration according to the duration proportion of the end-expiratory stationary section of the next respiratory cycle, and controlling pulse oxygen supply of the oxygen generator by taking the pre-judgment window period as a pulse trigger countdown parameter of the oxygen generator, thereby realizing accurate synchronization of the oxygen supply action and the inspiration action.

The disclosure provides systems and methods for treating obstructive sleep apnea using an inertial measurement unit (IMU) comprising an accelerometer and a gyroscope, wherein the IMU is configured to detect chest and / or abdominal movement by a patient during the inspiration and expiration stages of a respiratory cycle and to generate positional data based on the detected movement. Positional data generated by the IMU is used by an implanted stimulation system to determine when to deliver electrical stimulation to a nerve which innervates an upper airway muscle, such as the hypoglossal nerve, to treat sleep apnea.

The utility model is applicable to the technical field of medical apparatus and instruments, and provides a structure for simulating human respiratory rate and a respirator test tooling, the structure for simulating human respiratory rate comprises a three-way connecting piece, the three-way connecting piece comprises a first connecting port, a second connecting port and a third connecting port, the first connecting port is connected with a simulated lung, and the second connecting port is connected with a simulated lung; the inspiration power part is connected to the second connecting port through a first gating valve, the expiration power part is connected to the third connecting port through a second gating valve, and when the first gating valve is opened and the second gating valve is closed, the inspiration power part works to blow air to the simulated lung to simulate the inspiration state of the human body; when the first gating valve is closed and the second gating valve is opened, the expiration power part works to pump out and discharge gas in the simulated lung, the expiration state of the human body is simulated, a complete breathing cycle is completed, the structure is simple and reliable, accurate simulated human body breathing monitoring parameter data can be provided for a breathing machine, and the breathing machine can be used for simulating the breathing state of the human body. And the requirements of special case test cases of the breathing machine are met.

This disclosure relates to systems and methods for monitoring sedated patients that are receiving supplemental oxygen flows. A method of monitoring a patient's breathing while sedated includes identifying an end expiratory pause in the patient's breathing pattern and obtaining a first respiratory signal corresponding to a nasal pressure of a patient. The method may also include delivering a pulse of high-flow oxygen during the end expiratory pause at a rate of about 30 liters-per-minute (L / min) and delivering the pulse of high-flow oxygen during the end expiratory pause for less than 0.5 seconds. The method may further include measuring a peak nasal pressure and a peak oxygen flow and synthesizing a second respiratory signal. The second respiratory signal may correspond to the peak nasal pressure and the peak oxygen flow, and may be normalized for the patient. The method may additionally include determining the patient's breathing pattern, rate, or frequency.