ASA Difficult Airway Guidelines

Difficult airway management starts before the laryngoscope touches the patient: prior difficult airway history, distorted neck anatomy, and bedside exam findings can predict trouble. The 2022 ASA difficult airway guidelines emphasize standard preparation, early backup planning, awake intubation for selected patients, and waveform capnography for confirmation.

ASA Difficult Airway Approach

• Preintubation airway assessment: Prior difficult airway documentation, head and neck radiation, sleep apnea, aspiration history, and distorted anatomy are high-yield clues that should shape the first-pass plan before medications are pushed.
• Bedside exam predictors: Limited neck mobility, small mouth opening, prominent upper teeth, beard, and upper lip bite test findings all raise the odds of difficult laryngoscopy and difficult rescue.
• Standardized setup routine: Preparation should be done the same way every time, with suction, oxygenation gear, induction and paralysis drugs, routine equipment, and a difficult airway cart ready before the attempt begins.
• Primary and backup devices: Video laryngoscopy is strongly favored as the initial device, but the safer move is choosing it alongside at least one backup such as an SGA, bougie, flexible scope, or cric kit.
• Awake intubation option: Expected difficult airways may be better managed with awake intubation, keeping the patient upright and breathing spontaneously while topical lidocaine supports tolerance. We get into the practical setup in the episode.
• Definitive tube confirmation: Confirmation starts with seeing the tube pass, but in-line waveform capnography is the preferred standard over colorimetric devices, with bilateral mid-axillary breath sounds as an added check.

References:

1. Jeffrey L, et al. 2022 American Society of Anesthesiologists Practice Guidelines for Management of the Difficult Airway. Anesthesiology 2022; 136:31–81. Link.