What is anesthesia machine?

As COVID-19 cases continue to rise, hospitals are concerned about shortages of personal protective equipment and ventilators to help critically ill patients breathe.

An anaesthesia machine is a medical device commonly used to administer inhalation anesthesia. It provides patients with a mixture of anesthetic gas and oxygen, while also monitoring blood pressure, pulse rate and body temperature. The anesthesia machine consists of flowmeter, evaporator, CO2 absorber, compressed gas source and mechanical breathing unit.

Why use an anesthetic machine?

(1) No matter what kind of anesthesia method is used in clinic, it can be said that anesthesia machine is the “life-saving machine” for anesthesia and surgery patients, and it is a very important equipment and tool for anesthesiologists;

(2) the anesthesia machine is designed for patients with general anesthesia, and is mainly used for patients with general anesthesia, but not in patients with general anesthesia (such as spinal nerve block intra-spinal canal or cervical plexus and arm plexus block) must also have the anesthesia machine for anesthesia, because any anesthetic method could cause respiratory depression or stop, or cardiac arrest, which requires anesthesia in patients with side must be ready for anesthesia machine, In order to provide assisted breathing or mechanical ventilation support to ensure the safety of patients, that is, anesthesiologists should ensure that there should be a functional anesthesia machine on site;

(3) Usually, the respiratory rate, inhaling ratio and ventilation rate of anesthesia machine are set according to the body weight and general condition of patients under general anesthesia. Anesthesia machine must be operated by human, and the safety of application is crucial. Therefore, it is important to be familiar with the performance of anesthesia machine before use, and check and test before operation, because clinically related adverse events caused by anesthesia machine often occur.

What is a Ventilator machine?

A hospital ventilator machine that helps a patient breathe when they can’t breathe on their own. For example, some patients in the intensive care unit, due to various reasons caused by weak spontaneous breathing or spontaneous breathing stop patients need to use ventilators to assist treatment.

Difference between anesthesia machine and ventilator

In fact, hospital anesthesia machine and ventilator have the intersection of functions, but have their own special aspects. The common point is that they can give patients breathing exercises (assisted breathing). The first difference is the composition of the breathing circuit. Anesthesia machine is composed of air supply system, breathing apparatus, breathing circuit system, anesthesia volatile tank, breathing safety monitoring system and anesthesia exhaust gas discharge system. The hospital ventilator machine is only composed of power system, control system, ventilation source and breathing air path. Secondly, they have different emission methods. The exhaust from the anesthesia machine has a carbon dioxide absorption loop, while the exhaust from the ventilator is directly discharged to the outside world. To put it simply, the anesthesia machine has the function of delivering anesthetic drugs to the patient, while the ventilator does not. Ventilators have therapeutic functions, anesthesia machines do not.

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