Maintenance of anesthesia is the next stage of induction. At this stage, the patient has lost consciousness and the body is gradually stabilizing. However, at this stage, the patient can still be threatened by the effects of surgery and anesthesia, so this stage requires close monitoring to prevent, detect early and handle complications that may occur.

Induction is one of the stages of the anesthesia process. In any stage of the anesthesia process, complications caused by anesthetic drugs can occur. The induction stage is the most dangerous stage where dangerous complications can occur due to the effects of anesthetic drugs.

Intravenous anesthesia is a method of injecting anesthetic drugs into the body through the veins, leading to a temporary loss of consciousness, sensation, and reflexes to serve the surgery. Compared with respiratory anesthesia, intravenous anesthesia has many advantages as well as certain disadvantages.

Anesthesia and resuscitation include all pre-anesthesia examinations. Accordingly, anesthesia, recovery, surgical resuscitation and pain control play a decisive role in the success of a surgery. Anesthetists also need to pay attention to the cardiovascular physiology and circulatory system of the patient because instability in the cardiovascular system can lead to complications during anesthesia or surgery, even death.