One of the risks that can occur during general anesthesia or procedural sedation is the possibility of patient awareness. This is a condition in which the patient is awake during surgery or procedure and can recall events or surroundings. This event can occur in 1:100 open heart surgery, in painless patients in 1:1000, and in pain in 1:3000.

Anesthesia is the use of drugs or other methods to temporarily cause loss of consciousness or sensation in a part or the whole body. To ensure good control of the risk of reactions, allergies and anaphylactic shock during anesthesia for patients, doctors need to comply with the pre-anesthesia examination.