Breathing machine

Abstract

The invention discloses a breathing machine. The breathing machine comprises a main machine, a gas conveying pipeline and a gas flow measuring system; the tail end of the gas conveying pipeline is connected with a breathing mask; the gas flow measuring system is used for measuring the volume flow of output gas of the breathing machine; the gas flow measuring system comprises a thermal flow sensorwhich is installed on the gas conveying pipeline, and is used for measuring volume flow of gas flowing through the gas conveying pipeline; a temperature sensor which is installed on the gas conveyingpipeline and used for obtaining the temperature of gas flowing through the gas conveying pipeline; a gas pressure sensor which is connected with the gas conveying pipeline and used for obtaining gas pressure in the gas conveying pipeline; and a flow converter which is used for calculating the volume flow of the output gas of the breathing machine according to a preset formula, the mass flow, the temperature and the gas pressure. By using a reasonable temperature and pressure compensation technology and optimizing a detection pipeline, the measurement precision of output gas of the breathing machine can be greatly improved, and it is guaranteed that the monitoring of the output gas of the breathing machine is not affected by temperature and atmospheric pressure changes in the working environment of the breathing machine.

Description

technical field [0001] The invention relates to the technical field of ventilators, in particular to a ventilator. Background technique [0002] As an effective means of artificially replacing the spontaneous ventilation function, the ventilator has been widely used in respiratory failure caused by various reasons, anesthesia breathing management during major surgery, respiratory support treatment and emergency resuscitation, and occupies an important position in the field of modern medicine. very important position. Ventilator is a vital medical equipment that can prevent and treat respiratory failure, reduce complications, save and prolong the life of patients. [0003] There are several ways to measure the output gas flow of the ventilator, including measurement with ultrasonic flow sensors, differential pressure flow sensors or thermal mass flow sensors. [0004] Among them, the information fed back by the ultrasonic flow sensor is the volume flow (which is the final c...

AI Technical Summary

Problems solved by technology

Some ventilators even directly take the sensor values ​​under the standard state as the actual detection values ​​without any temperature and pressure compensation, which makes the ventilators unusable in application environments with large temperature and air pressure changes such as mountaineering rescue or helicopter rescue; or some ventilators The machine has made temperature and pressure compensation for the data of the flow sensor, but because the temperature and air pressure data are not well fitted, the gas flow calculation deviation is large and the accuracy is not high in applications where the temperature and air pressure change greatly

[0013] 2. At present, most ventilators on the market use built-in flow sensors to monitor the output flow of the ventilator, which will lead to inaccurate output gas detection data due to air leakage in the breathing pipeline

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