Managing the airway of critically ill patients with obesity in the ICU presents a high-stakes combination of anatomical and physiological hurdles. Increased adipose tissue narrows the upper airway and makes soft tissues highly collapsible. Simultaneously, a reduced functional residual capacity (FRC) drastically shortens safe apnea time, leaving these patients highly vulnerable to severe hypoxemia during intubation.

To mitigate these risks and avoid cardiovascular collapse, clinicians must implement targeted preoxygenation, precise hemodynamic monitoring, and advanced visualization tools.

The Hypoxemia Threat: Due to a significantly reduced FRC, patients with obesity have a dangerously brief window before desaturation occurs.

Airway Optimization: Non-invasive, positive-pressure ventilation is highly effective in increasing FRC and should be utilized continuously from pre-induction through laryngoscopy. For high-risk individuals, awake intubation should be strongly considered.

The Critical Transition: Switching from negative to positive intrathoracic pressure can severely strain the cardiovascular system (especially the right ventricle). Clinicians must carefully evaluate hemodynamic status—ideally using ultrasound—and cautiously titrate positive end-expiratory pressure (PEEP).

Future research is still needed to determine the safety of pre-emptive vasopressors to prevent post-intubation collapse, as well as the absolute optimal dosing of hypnotic agents.

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