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Ventilatory Management of the Patient with Severe Obesity

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Practical Trends in Anesthesia and Intensive Care 2020-2021

Abstract

Obesity is an important risk factor for major complications, morbidity, and mortality related to intubation procedures and ventilation in the intensive care unit (ICU). The fall in functional residual capacity promotes airway closure and atelectasis formation. In this chapter, we will present the impact of obesity on the respiratory system and the key points to optimize airway management and noninvasive and invasive mechanical ventilation in ICU patients with obesity. Noninvasive strategies should first optimize body position with reverse Trendelenburg position or sitting position. Noninvasive ventilation (NIV) is considered as the first-line therapy in patients with obesity having a postoperative acute respiratory failure. Positive pressure pre-oxygenation before the intubation procedure is the method of reference. The use of videolaryngoscopy has to be considered by adequately trained intensivists, especially in patients with several risk factors. Regarding mechanical ventilation in patients with and without acute respiratory distress syndrome (ARDS), low tidal volume (6 ml/kg of predicted body weight) and moderate to high positive end-expiratory pressure (PEEP), with careful recruitment maneuver in selected patients, are advised. Prone positioning is a therapeutic choice in severe ARDS patients with obesity. Prophylactic NIV should be considered after extubation to prevent reintubation. If obesity increases mortality and risk of ICU admission in the overall population, the impact of obesity on ICU mortality is less clear and several confounding factors have to be taken into account regarding the “obesity ICU paradox.”

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Chiumello, D., Chiodaroli, E., Zuanetti, G.M. (2022). Ventilatory Management of the Patient with Severe Obesity. In: Chiumello, D. (eds) Practical Trends in Anesthesia and Intensive Care 2020-2021. Springer, Cham. https://doi.org/10.1007/978-3-031-14612-1_10

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