31 results about "Expiratory Time" patented technology

A method of operating a CPAP apparatus in which the interface pressure is controlled to rapidly drop at the start of expiration by an expiratory relief pressure (ERP) that is independent of instantaneous respiratory flow, following which the pressure rises to an inspiratory level at or shortly before the end of expiration, or at the onset of an expiratory pause, if any. The ERP is an increasing function of the inspiratory pressure. The expiratory pressure follows a template that is a function of the expected expiration time, the magnitude of the template being equal to the ERP. The current estimated proportion of expiration is determined by comparing the expiration time of the breath in progress to low-pass filtered expiratory durations measured for a number of the preceding breaths.

Provided is a device for attachment to the head of a horse to enable recording of respiratory sounds in the intensely exercising animal, e.g., in a breezing Thoroughbred racehorse. Also provided are methods for predicting racing performance in a horse, e.g., a Thoroughbred race horse, comprising measuring expiratory and / or inspiratory times for a subject horse during exercise and relating such information to anatomy, front leg stance times and / or front leg stance distances and / or to speed (velocity) to determine the animal's potential to sustain a superior rate of ground coverage for a desired amount of time and identify a maximum comfortable velocity for the animal. A presently preferred embodiment of the methods of the invention comprises predicting performance via identification of expiratory time determined directly from the analysis of recorded respiratory sound from the exercising animal.

At least an expiratory period during which a user is instructed to take an expiratory action as a respiratory action and an inspiratory period during which the user is instructed to take an inspiratory action as the respiratory action are set. One of enlargement and reduction of a first object is performed during the expiratory period, and the other of the enlargement and the reduction of the first object is performed during the inspiratory period, the first object representing a loop path. During the expiratory period, a second object is caused to move along and complete one full circuit of the path in a time from a beginning to an end of the expiratory period, and during the inspiratory period, the second object is caused to move along and complete one full circuit of the path in a time from a beginning to an end of the inspiratory period.

The invention comprises a ventilation apparatus and method for operating a ventilator of a ventilator apparatus, wherein in the method at least one duration ratio factor is set in a computing system of the ventilator apparatus; at least one minute volume, at least one functional dead space volume and at least one time constant are determined; a respiration frequency is computed, based on a previously defined lung model, depending on said determined parameters, where said computed respiration frequency is optimized on at least one minimum of a delivered parameter, which is induced to a patient using said ventilator; an inspiratory time and an expiratory time are determined based on said computed respiration frequency and said duration ratio factor; at least one tidal volume based on said previously computed respiration frequency and said determined minute volume is computed; and a delivered respiratory parameter of the ventilator is closed loop controlled.

The invention relates to a pneumatic air-controlled ventilator. The pneumatic air-controlled ventilator uses gas as the power source, and the high-pressure gas forms periodic work through the pneumatic valve to supply the patient with an appropriate tidal volume and respiratory rate. The pneumatic air-controlled ventilator only needs to be connected to the air source, and the patient's appropriate respiratory rate and tidal volume can be supplied through the pressure reducing valve and control valve of the pneumatic air-controlled ventilator itself. The control valve of the pneumatic air-controlled ventilator can control the respiratory frequency and tidal volume adjustment. When the pressure of the normally open valve control air chamber rises to the set value, close the normally open valve, and the control gas in the normally closed valve control air chamber is discharged from the air resistance at the same time as the normally open valve is closed, and the normally closed valve resumes closing state, then stop the air supply at the rear end of the normally closed valve, the time period from this moment to the next normally closed valve ventilation is the patient’s exhalation time, and the process from inhalation to exhalation is completed, and the pneumatic air-controlled ventilator works in a cycle like this.

The invention provides an inhaling holding method for an electrically powered electrically controlled ventilator. The method comprises the following steps of: setting the electrically powered electrically controlled ventilator into a volume controlled ventilation working mode, and setting inhaling holding parameters; obtaining target inhaling time and target exhaling time during the ventilation of inhaling holding according to the inhaling holding parameters and the preset conventional respiratory parameters; and performing ventilation control according to the target inhaling time, the targetexhaling time, the inhaling holding parameters and the conventional respiratory parameters. The inhaling holding method is applicable to the situation that the ventilator is in transit and has no compressed air sources, does not need medical staff to stay for operation, simplifies the manual operation of realizing an inhaling holding function, and ensures that the medical staff who perform lung function radiography are free from physical injury caused by high-intensity radiation, so the inhaling holding method solves the problems that a pneumatically powered electrically controlled ventilatorin the prior art fails to be used under the condition of transit or no compressed air sources and has adverse effect on the health of the medical staff who perform lung function radiography.

The invention relates to a breathing switching based breathing machine pressure control method and a breathing machine. The breathing switching based breathing machine pressure control method comprises the steps that gas flow data of the breathing machine is acquired, an expiration time point corresponding to an expiration inflection point of a user during expiration in each expiration period is determined according to the acquired gas flow data; whether a breathing state of the user is rapid breathing or normal breathing is judged based on the gas flow data corresponding after the expiration time point within the same expiration period, and whether an inspiration time point when the user begin to inspire corresponding in a breathing period is determined according to a judgement result; a breathing machine pressure is controlled based on the gas flow data corresponding to the expiration time point in each breathing period and the gas flow data corresponding to the inspiration time point. The breathing switching can accurately control the breathing machine pressure, discomfort brought to the user in the using process is avoided, and the usage experience of the user is improved.