Occurence of a patient becoming conscious during a procedure performed under GENERAL ANESTHESIA and subsequently having recall of these events. (From Anesthesiology 2006, 104(4): 847-64.)

Devices used to assess the level of consciousness especially during anesthesia. They measure brain activity level based on the EEG.

The act of "taking account" of an object or state of affairs. It does not imply assessment of, nor attention to the qualities or nature of the object.

Procedure in which patients are induced into an unconscious state through use of various medications so that they do not feel pain during surgery.

The period during a surgical operation.

The constant checking on the state or condition of a patient during the course of a surgical operation (e.g., checking of vital signs).

Agents that are capable of inducing a total or partial loss of sensation, especially tactile sensation and pain. They may act to induce general ANESTHESIA, in which an unconscious state is achieved, or may act locally to induce numbness or lack of sensation at a targeted site.

Patient care procedures performed during the operation that are ancillary to the actual surgery. It includes monitoring, fluid therapy, medication, transfusion, anesthesia, radiography, and laboratory tests.

The process whereby a representation of past experience is elicited.

Complications that affect patients during surgery. They may or may not be associated with the disease for which the surgery is done, or within the same surgical procedure.