Gas relief valve and anesthesia machine containing same

Abstract

The invention discloses a gas relief valve and an anesthesia machine containing the same. The gas relief valve comprises a valve body and a diaphragm, wherein the valve body is provided with an inner cavity and an airway channel, and the inner cavity is communicated with the airway channel through a valve port; the diaphragm is arranged on the valve port and divides the inner cavity into a first cavity and a second cavity; the first cavity is communicated with the airway channel, and the second cavity is far from the airway channel; the valve body is provided with a gas outlet communicated with the first cavity; when the diaphragm is opened, the gas outlet is connected with the airway channel through the second cavity; the valve body is also provided with a gas relief channel communicated with the second cavity; and the gas relief channel selectively communicates the second cavity with the outside of the airway channel or valve body. The gas relief valve can implement quick switching between opening and closing by controlling the magnitude of the pressure in the valve relative to the pressure in the main airway. Meanwhile, by selectively discharging partial gas to control the gas pressure in the gas relief valve, the invention ensures the normal use of the gas feeder, and effectively prolongs the service life of the gas feeder.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to an overflow valve and an anesthesia machine including the same. Background technique [0002] At present, anesthesia machines mostly use the process of injecting anesthetics through the breathing process of patients. During the use of anesthesia machines, anesthetics flow into the patient's respiratory system along with oxygen. Existing anesthesia machines mostly use turbines as power sources. This kind of turbine cannot meet the conditions of quick start, and can only continuously provide low-pressure and constant-pressure airflow. [0003] During the patient's breathing process, using the airflow provided by the turbine as the driving gas cannot meet the rapid transition of the patient's inhalation and exhalation state, increases the resistance of the patient's exhalation, and also makes the turbine be in the state of extreme pressure load for a long time, which seriously sho...

AI Technical Summary

Problems solved by technology

[0002] At present, most anesthesia machines inject anesthesia through the breathing process of the patient. During the use of the anesthesia machine, the anesthesia flows into the patient's respiratory system along with oxygen. Most of the existing anesthesia machines use turbines as the power source. This kind of turbine cannot meet the conditions of quick start, and can only continuously provide low-pressure constant-pressure airflow

[0003] During the patient's breathing process, using the airflow provided by the turbine as the driving gas cannot meet the rapid transition of the patient's inhalation and exhalation state, increases the resistance of the patient's exhalation, and also makes the turbine be in the state of extreme pressure load for a long time, which seriously shortens the speed of the turbine. service life

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