Do you know the type of inhalation anesthesia machine ?
Anesthesia machine is through the mechanical circuit of anesthetics into the patient's alveoli, the formation of anesthetics gas partial pressure, diffusion to the blood, directly inhibit the central nervous system, thus producing the effect of general anesthesia. Anesthesia machine belongs to semi-open anesthesia device. It is mainly composed of anesthesia evaporation tank, flow meter, folding bellows ventilator, breathing circuit (including suction, expiratory one-way valve and manual air bag), corrugated pipeline and other components.
Type of inhalation anesthesia machine:
Air anesthesia machine
The device is portable and applicable, can directly use air and oxygen as carrier gas, can assist breathing and control breathing, to meet various surgical requirements.
It works by connecting the air anesthesia machine to a closed mask or tracheal tube after the patient has completed anesthesia induction. During inhalation, the anesthetic gas mixture enters the patient's body through an open suction valve. On exhalation, the expiratory valve opens and the inspiratory valve closes to expel the exhaled air. Folding bellows are available when assisted or controlled breathing is used. Press down on the inhale and pull up on the exhale to ensure client has adequate ventilation. At the same time, ether switch is adjusted according to actual needs to maintain a stable anesthesia level. The deficiency of this device is the low concentration of ether, can only be used as the maintenance of anesthesia, and ether consumption is large, easy to cause environmental pollution.
Direct flow anesthesia machine
Direct flow anesthesia machine is composed of high pressure oxygen, pressure reducer, flow meter and anesthesia liquid evaporator.
Circular closed anesthesia machine
The device provides the patient with a low - flow anesthetic mixture through the valve (portal). The exhaled gas passes through the expiratory valve into the CO2 absorber for reuse. Its structure is mainly composed of oxygen supply and nitrous oxide device, gas flow meter, evaporator, CO2 absorber; The modern anesthesia machine is also equipped with ventilator-airway pressure, expiratory flow, CO2 concentration at the end of expiratory, inhalation anesthetic concentration, oxygen concentration monitor, hypoxia alarm and hypoxic-nitrous oxide automatic protection device.
