general anesthesia (GA), the absence of sensation and consciousness as induced by various anesthetic medications, given by inhalation or IV injection. The components of general anesthesia are analgesia, amnesia, muscle relaxation, control of vital signs, and unconsciousness. The depth of anesthesia is planned to allow the surgical procedure to be performed without the patient experiencing pain, moving, or having any recall of the procedure. Endotracheal intubation or insertion of another artificial airway device and respiratory support are often necessary. General anesthesia may be administered only by an anesthesiologist with or without an assistant or a certified registered nurse anesthetist and by a dentist with postgraduate training and licensing. Compare local anesthesia, regional anesthesia, topical anesthesia. See also anesthesia.
