dre anesthesia machine principle and structure classification

　　The dre anesthesia machine is an essential part of an anesthesiologist's routine work. Most surgeries nowadays require general anesthesia, which is especially true with an inhalation dre anesthesia machine. dre anesthesia machine is used to mix gas source (oxygen) with anesthesia gas through an artificial mechanical circuit. Anesthetic gas with variable concentration will be delivered to the patient's alveoli to form partial pressure of anesthetic gas, which will diffuse into the blood to produce inhibition on the central nervous system and achieve the purpose of general anesthesia.

　　Respiratory circuit:

　　Simple ventilation system → non-valvular system → valvular system → Circulating loop system → Adding the ventilator → Adding the dre anesthesia machine component

　　The basic structure of the dre anesthesia machine:

　　In principle, the dre anesthesia machine consists of four main systems: the gas supply and control loop system, the respiratory and ventilation loop system, the clearance system, and a set of system function and respiratory loop monitors. From the basic structure, it includes the following parts:

　　1. Air supply device

　　2. Flow meter

　　3. Evaporator

　　4. Ventilation system

　　5. Anesthetic ventilator

　　6. Monitoring and alarm devices

　　7. Anesthetic residual gas removal system

　　Anesthetic ventilator Type:

　　1. According to the power source can be divided into: pneumatic, electric, the combination of the two

　　2. According to the driving mechanism can be divided into: double ring road, pneumatic type

　　3. According to the periodic mechanism can be divided into: constant volume, constant pressure, timing

　　4. Modern dre anesthesia machine: constant volume and timing switch

　　Common ventilator introduction

　　1. Drager ventilator

　　1.1 Features: piston design, electric control

　　Precise delivery of tidal volume

　　No need to consume drive gas, just supply fresh air

　　No machine automatic PEEP

　　Rolling film design, very low compliance, precise piston positioning

　　1.2 Advantages: Suitable for all patients: newborn to adult

　　With all ventilation modes: volume control ventilation pressure control ventilation PCV synchronous intermittent command