Bariatric Intubation

Morbid obesity turns airway management into a physiologic emergency: reduced reserve, rapid desaturation, and chest-wall load make crash intubation especially dangerous. Bariatric intubation is won with positioning, preoxygenation with PEEP, and an airway plan built before the patient loses their work of breathing.

Bariatric airway and ventilation

• Early airway decision: Morbidly obese patients in respiratory distress have little reserve and can desaturate fast, so a prepared early intubation is often safer than waiting for a peri-arrest airway.
• Ramped positioning target: Positioning matters most: raise the patient until the external auditory meatus aligns with the sternal line, a practical ramping endpoint that improves laryngoscopy and mechanics.
• Triple setup strategy: Have a video laryngoscope, video bronchoscope, and cricothyrotomy kit at the bedside from the start; that full difficult-airway layout is worth hearing in the episode.
• DSI over RSI: Rapid sequence intubation is a poor fit when induction dosing is uncertain; ketamine-facilitated delayed sequence intubation reduces awareness risk before paralysis.
• PEEP-first preoxygenation: Preoxygenation should emphasize PEEP because atelectasis is already looming; CPAP, BiPAP, or a BVM with a PEEP valve can meaningfully extend safe apnea time.
• Post-intubation ventilator approach: Use tidal volume based on predicted body weight, not total body weight, and expect higher PEEP needs because the heavy chest wall commonly requires 10-26 cm H2O.

References:

1. De Jong A, Molinari N, Pouzeratte Y, et al. Difficult intubation in obese patients: incidence, risk factors, and complications in the operating theatre and in intensive care units. Br J Anaesth. 2015;114(2):297-306. PMID: 25431308
2. Dargin J, Medzon R. Emergency department management of the airway in obese adults. Ann Emerg Med. 2010;56(2):95-104. PMID: 20363528
3. Nestler C, Simon P, Petroff D, et al. Individualized positive end-expiratory pressure in obese patients during general anaesthesia: a randomized controlled clinical trial using electrical impedance tomography. Br J Anaesth. 2017;119(6):1194-1205. PMID: 29045567
4. De Jong A, Wrigge H, Hedenstierna G, et al. How to ventilate obese patients in the ICU. Intensive Care Med. 2020;46(12):2423-2435. PMID: 33095284