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A difficult airway occurs when a trained clinician anticipates or encounters difficulty with any aspect of airway management, including facemask ventilation, supraglottic airway placement, tracheal intubation, or emergency front-of-neck access. Modern airway management emphasizes structured planning, maintenance of oxygenation, maximizing first-pass success, and early recognition and declaration of difficulty. Anatomic, physiologic, and situational factors may all contribute to airway challenges, requiring clinicians to apply systematic assessment and escalation strategies. Increasingly, human-factors principles, effective teamwork, and the use of cognitive aids are recognized as essential components of safe airway management and improved patient outcomes. This continuing education activity reviews the recognition and evaluation of difficult airways and outlines evidence-based strategies for preparation and management. The activity also highlights the role of interprofessional collaboration, structured airway plans, and crisis resource management principles in optimizing patient safety. By participating in this activity, healthcare professionals strengthen their ability to anticipate airway difficulty, implement appropriate management pathways, and respond effectively to airway emergencies. Objectives: Identify anatomic, physiologic, and situational factors that increase the risk of a difficult airway. Implement structured airway management plans that prioritize oxygenation and first-pass success. Apply evidence-based techniques and devices, such as videolaryngoscopy and supraglottic airways, during airway management. Communicate clearly with team members during airway management using shared situational awareness and closed-loop communication. Access free multiple choice questions on this topic.

A difficult airway exists when a clinician skilled in airway management encounters difficulty with one or more standard techniques: facemask ventilation, supraglottic airway placement, tracheal intubation (direct or video), or emergency front-of-neck access. Contemporary international guidance emphasizes both anticipated and unanticipated difficulty across the entire airway episode, including extubation.[1][2][3][4] This framework appears in recent guidelines aimed at improving planning and escalation.[1][4] Also, this helps clinicians anticipate potential challenges and select appropriate airway management strategies before complications arise through this. Airway difficulty may be categorized as: Anatomic (eg, restricted mouth opening, distorted airway anatomy) Physiologic (eg, hypoxemia, hemodynamic instability, acidosis) Situational (eg, resource-limited settings, time-critical emergencies) Despite structured assessment, prediction is imperfect, and large registry data show many difficult airways are unanticipated. Airway management failures continue to drive morbidity and mortality; analyses from the American Society of Anesthesiologists Closed Claims database and recent national audits reiterate these risks and emphasize limiting attempts, maximizing first-pass success, and prioritizing oxygenation. Human-factors contributors—including fixation error, delayed escalation, and cognitive overload—remain major recurring themes in airway-related adverse events reported in national audits.[2][3][5] Modern airway management strategies center on: Maintenance of oxygenation throughout the procedure First-pass success with appropriate devices Early recognition and declaration of difficulty Structured escalation and contingency plans (eg, Plans A–D).[4]

Airway management can result in several complications, many of which are preventable with appropriate monitoring and technique. Unrecognized esophageal intubation is among the most dangerous and should be prevented by routine use of continuous waveform capnography with confirmation of sustained exhaled CO2. The Project for Universal Management of Airways recommends the default removal of the tube if sustained CO2 is not detected, unless removal would place the patient at immediate risk.[23] Mainstem bronchial intubation may occur if the endotracheal tube is advanced too deeply and should be suspected when unilateral breath sounds or asymmetric chest expansion are present; correction involves withdrawing the tube until bilateral breath sounds are restored. Other complications include laryngeal or airway trauma, vocal fold injury, dental injury, aspiration, hypoxemia, hypotension, and cardiac arrest, with risk increasing as the number of attempts rises and physiologic reserve decreases. Videolaryngoscopy reduces some complications, particularly esophageal intubation, compared with direct laryngoscopy in critically ill populations.[9] Postextubation complications such as hoarseness, stridor, and extubation failure highlight the importance of a planned extubation strategy and appropriate monitoring. Early otolaryngology consultation should be considered if arytenoid or laryngeal injury is suspected, and national audit data emphasize vigilance during emergence and recovery.[5] Worsening hypoxemia, rising capnography baselines, or increasing airway pressures during or after intubation attempts should prompt immediate evaluation and corrective action. The DOPES mnemonic can help rapidly identify and manage common causes of postintubation deterioration: D (Displacement): Check end-tidal CO2, confirm tube depth at the lips or teeth, and assess for bilateral breath sounds. O (Obstruction): Attempt to pass a suction catheter through the tube. If obstruction from secretions or a plug is suspected, remove and replace the tube if necessary. P (Pneumothorax): Perform bedside ultrasound or obtain an urgent chest radiograph. If breath sounds are absent and there is high clinical suspicion, perform a thoracostomy. E (Equipment): Disconnect the patient from the ventilator and initiate manual ventilation with a bag-valve-mask to rule out ventilator malfunction.

O (Obstruction): Attempt to pass a suction catheter through the tube. If obstruction from secretions or a plug is suspected, remove and replace the tube if necessary. P (Pneumothorax): Perform bedside ultrasound or obtain an urgent chest radiograph. If breath sounds are absent and there is high clinical suspicion, perform a thoracostomy. E (Equipment): Disconnect the patient from the ventilator and initiate manual ventilation with a bag-valve-mask to rule out ventilator malfunction. S (Stacked breaths or stomach distention): Disconnect from the ventilator and ventilate manually; consider gentle chest wall pressure or placement of a nasogastric or orogastric tube to decompress gastric insufflation.

When encountering a difficult airway, healthcare professionals should call for assistance early. Shared mental models, clear role assignment, and the use of cognitive aids are essential to effective team performance. Attempts with any single technique should be limited, with a prompt transition to alternative strategies if airway management is unsuccessful. In cannot intubate, cannot oxygenate (CICO) situations, the most experienced operator should perform subsequent attempts or eFONA. Institutions should support airway leads, standardized difficult airway trolleys, and regular simulation training.[4] Human-factors principles are increasingly recognized as central to safe airway management. Cognitive offloading with preintubation checklists, closed-loop communication, and clear declaration of failed attempts reduces fixation errors and task saturation. International guidelines also stress the importance of shared situational awareness, in which all team members—not only the primary operator—monitor oxygen saturation trends, hemodynamic responses, and the number and quality of attempts. Institutions should regularly review airway-related incidents and integrate lessons learned into simulation and protocol updates. This continuous quality improvement process helps identify system vulnerabilities and reinforces best practices in airway management.