Anesthesia is a state of absence of pain as a sensation due to the effect of anesthetics on nerve cells. In Russian science, the concept was first introduced in 1865. This term was introduced by the famous Russian surgeon N.I. Pirogov. Initially, anesthesia was understood as just a loss of sensitivity of the sensitivity itself: for a child experiencing severe toothache and losing consciousness from it, the word “anesthesia” was not yet