Anesthesia is the procedure of inducing insensitivity to external stimuli. Operations without anesthesia are impossible to imagine today. General anesthesia is a state of the body similar to deep sleep, in which the patient does not feel pain or other external stimuli. It begins by setting up an intravenous infusion to the patient and injecting a fast-acting sedative, and continues with further administration of strong analgesics and various anesthetics.
Siniša Franjić (Tue,) studied this question.