The following terms provide a foundation for understanding the field of anesthesiology and its associated practices and procedures:
Analgesia: The absence of pain in response to stimulation that would normally be painful.
Analgesic: A medication used to relieve pain without causing loss of consciousness.
Anesthesia: A state of controlled, temporary loss of sensation or awareness induced for medical purposes. It can be general, regional, or local.
Anesthesiologist: A physician who specializes in anesthesia, pain management, and critical care medicine.
Anesthetic: A drug or agent used to induce anesthesia.
ASA Classification: A system used by anesthesiologists to assess and communicate a patient’s pre-anesthesia medical comorbidities (American Society of Anesthesiologists Physical Status Classification System).
Bispectral Index (BIS): A monitoring method used to measure the depth of anesthesia based on brain activity.
Emergence: The phase during which a patient transitions from an anesthetized state back to consciousness after a procedure.
Epidural Anesthesia: A regional anesthesia technique that involves injecting anesthetic medication into the epidural space surrounding the spinal cord.
General Anesthesia: A medically induced state of unconsciousness and loss of protective reflexes, resulting in insensitivity to pain during a procedure.
Induction: The initial phase of anesthesia during which a patient transitions from an awake state to an anesthetized state.
Intravenous (IV) Anesthesia: Anesthesia administered through a vein.
Intubation: The insertion of a tube into the trachea to maintain an open airway, often necessary during general anesthesia.
Laryngeal Mask Airway (LMA): A device placed in the mouth and throat to help keep the airway open during anesthesia.
Local Anesthesia: Anesthesia that causes loss of sensation in a small, specific area of the body without affecting consciousness.
MAC (Monitored Anesthesia Care): A planned anesthesia service during which local anesthesia is combined with varying levels of sedation and pain control, while an anesthesiologist closely monitors the patient.
Maintenance: The phase during which anesthesia is sustained throughout a surgical or procedural intervention.
Nerve Block: An injection of an anesthetic near a nerve or group of nerves to block sensation in a specific area of the body.
PONV (Postoperative Nausea and Vomiting): A common complication that can occur following anesthesia and surgery.
Propofol: A commonly used intravenous anesthetic medication for the induction and maintenance of general anesthesia.
Regional Anesthesia: Anesthesia that affects a larger area of the body, such as a limb or the lower half of the body, typically by blocking nerve conduction.
Sedation: The administration of medications to promote relaxation, reduce anxiety, or induce varying levels of sleepiness during a procedure.
Spinal Anesthesia: A type of regional anesthesia involving the injection of anesthetic medication into the cerebrospinal fluid within the subarachnoid space.
TIVA (Total Intravenous Anesthesia): General anesthesia maintained exclusively with intravenous medications, without the use of inhaled anesthetic gases.
Ventilation: The mechanical process of assisting or controlling breathing, often used during surgery when a patient is under general anesthesia.