Cer.A.T.T. key terms

A cylinder-to-yoke safeguard in which two pins on the machine yoke must align with matching holes in the cylinder valve, so only the correct gas cylinder can be attached.

Gas-specific paired connectors with two different diameters that physically prevent a hose or regulator from being attached to the wrong pipeline outlet or wall source.

A fail-safe mechanism that reduces or cuts off nitrous oxide and other gas flow when oxygen supply pressure falls, helping prevent delivery of a hypoxic gas mixture.

A device that turns a liquid volatile anesthetic into vapor and adds a controlled, temperature- and flow-compensated concentration to the fresh gas stream entering the breathing circuit.

A canister of soda lime or similar hydroxide granules that chemically removes exhaled carbon dioxide from the rebreathing circuit so unused gas can be rebreathed.

A one-way check valve in the breathing circuit that keeps gas moving in a single direction, preventing rebreathing of exhaled gas and backward flow during manual ventilation.

Tubing, reservoir, and connections that capture waste anesthetic gas leaving the circuit or ventilator and carry it outdoors, reducing staff exposure in the anesthetizing area.

A standardized pre-use sequence that verifies gas supplies, high- and low-pressure integrity, vaporizer function, alarms, and breathing circuit tightness before an anesthetic begins.

A noninvasive monitor that estimates arterial oxygen saturation by comparing light absorption of red and infrared wavelengths through pulsating tissue, displayed as a percentage with a waveform.

Continuous measurement and display of carbon dioxide in respired gas, usually as a waveform, used to confirm tracheal tube placement and to assess ventilation, circulation, and circuit integrity.

The carbon dioxide concentration or partial pressure measured at the very end of exhalation, which approximates alveolar and therefore arterial carbon dioxide levels.

A fluid-filled catheter and diaphragm assembly that converts arterial pressure waves into an electrical waveform, requiring zeroing and leveling at the phlebostatic axis to be accurate.

Peripheral nerve stimulation that delivers four supramaximal twitches in sequence, allowing assessment of the depth of neuromuscular blockade and adequacy of recovery.

The alveolar concentration of an inhaled anesthetic at which half of patients do not move in response to a standard surgical stimulus; used to compare potency and guide depth.

Applying drug name, concentration, dose, and preparation time to every syringe or container immediately after it is filled, so drugs can be identified without relying on memory.

Documented dispensing, administration, wasting with a witness, and end-of-shift reconciliation of scheduled drugs, as required by regulation and institutional policy.

A drug given to counteract residual effects of an anesthetic or neuromuscular blocker, such as neostigmine paired with an anticholinergic, or sugammadex for aminosteroid blockers.

A bedside grading of which oropharyngeal structures are visible with the patient seated, mouth open, and tongue protruded, used with other findings to estimate difficulty of laryngoscopy.

An airway that sits above the larynx and ventilates without entering the trachea, used for rescue ventilation, short procedures, or as a conduit for intubation.

An inflatable balloon near the distal end of a tracheal tube that seals the airway for positive-pressure ventilation; pressure is monitored to limit tracheal mucosal ischemia.

A standardized, immediately available collection of alternative blades, stylets, supraglottic devices, and rescue equipment that is checked regularly and restocked after every use.

A laryngoscope with a camera at the blade tip that projects the glottic view onto a screen, often improving visualization when direct laryngoscopy is difficult or blood is present.

Cleaning hands with alcohol-based rub or soap and water at defined moments before and after patient contact; the single most effective action for preventing healthcare-associated infection.

Infection control practices applied to every patient regardless of diagnosis, including hand hygiene, gloves, gowns, masks, eye protection, and safe handling of sharps and body fluids.

A process that destroys all microorganisms except large numbers of bacterial spores, used for semicritical items such as laryngoscope blades, supraglottic airways, and flexible bronchoscopes.

The area of sterile drapes and opened sterile items where only sterile objects may contact; anything below table level or outside the drape is considered contaminated.

A pause by the entire team immediately before the procedure to verbally confirm patient identity, site, procedure, consent, and any special requirements such as antibiotics or equipment.

A structured team review after a serious event that traces causal and contributing system factors and produces corrective actions rather than focusing blame on an individual.

A small-scale improvement method that tests a change, measures the result, and adjusts before wider adoption, repeated in rapid cycles to build reliable processes.

An unexpected occurrence involving death or serious physical or psychological harm, or the risk of either, that triggers immediate investigation and a required response.

A structured handoff format covering Situation, Background, Assessment, and Recommendation, used to deliver critical information concisely and reduce omissions during transitions of care.

The clinical and legal document that captures drugs, fluids, vital signs, airway events, and monitoring throughout the anesthetic; entries must be accurate, legible, and made in real time.

The documented process in which a patient, after receiving an explanation of risks, benefits, and alternatives, voluntarily agrees to a procedure or treatment.

A pharmacogenetic hypermetabolic crisis triggered by volatile anesthetics or succinylcholine, marked by rising end-tidal carbon dioxide, muscle rigidity, hyperthermia, and tachycardia.

The specific antidote for malignant hyperthermia; it blocks calcium release from skeletal muscle and is given as a rapid intravenous bolus, repeated until the crisis abates.

Team behaviors used in high-stakes emergencies, including role clarity, closed-loop communication, callouts, and a shared mental model, that improve performance when events are rare and sudden.