In airway management, first pass success in tracheal intubation is associated with fewer complications such as hypoxemia, aspiration, hypotension, airway trauma, and cardiac arrest. Multiple studies across emergency departments, intensive care units, and prehospital settings have demonstrated that the risk of adverse events increases significantly with each additional attempt. Improving first pass success in intubation requires a systematic approach that integrates patient assessment, preparation, equipment optimization, pharmacologic strategy, team coordination, and technical proficiency.
The foundation of first pass success is thorough airway assessment. While no assessment tool perfectly predicts difficulty, structured evaluation using established frameworks—such as evaluation of mouth opening, neck mobility, dentition, mandibular space, and external anatomy—can identify patients at risk for difficult laryngoscopy or ventilation. In critically ill patients, physiologic difficulty often poses a greater threat than anatomic difficulty. Severe hypoxemia, hypotension, metabolic acidosis, or right ventricular failure can precipitate rapid decompensation during apnea. Anticipating both anatomic and physiologic challenges allows clinicians to adjust strategy before the first attempt.
Preoxygenation should be optimized to maximize safe apnea time. Strategies may include non-rebreather masks at flush rates, high-flow nasal oxygen, noninvasive ventilation, or positive pressure ventilation with a well-sealed mask, depending on the clinical context. In patients at high risk for desaturation, combining modalities and providing apneic oxygenation can extend oxygen reserves. Hemodynamic optimization prior to induction, including judicious fluid administration or vasopressor support, reduces the risk of peri-intubation hypotension.
Equipment selection plays a central role in first pass success for intubation. Video laryngoscopy has been associated with improved glottic visualization and higher first attempt success rates in many settings, particularly among less experienced operators or in predicted difficult airways. However, device familiarity is paramount; clinicians should preferentially use equipment with which they are most skilled. The airway plan should include immediate availability of adjuncts such as bougies or stylets, which can significantly increase success when glottic exposure is suboptimal. Proper patient positioning, including ramping in obese patients to align the external auditory meatus with the sternal notch, improves laryngoscopic view and ventilation mechanics.
Pharmacologic strategy must be individualized. Adequate dosing of induction agents and neuromuscular blockers is crucial, as underdosing can result in poor intubating conditio