Prospective randomized controlled crossover study compares high flow nasal oxygen and face mask oxygen in pregnant individuals, suggesting improved outcomes.
( Int J Obstet Anesth. 2024;60:104236. DOI: 10.1016/j.ijoa.2024.104236) Pregnant individuals face higher risks of difficult airway management, failed ventilation, and rapid oxygen desaturation during general anesthesia compared with the nonpregnant adult population. Preoxygenation techniques are critical to minimize maternal and neonatal risk. The commonly used method for preoxygenation in parturients is a face mask (FM), and it remains unclear whether this technique can consistently achieve the recommended end-tidal oxygen (EtO2) concentration of at least 90% before intubation. High flow nasal oxygen (HFNO) could potentially offer benefits such as faster application, increased comfort for the patient, and improved respiratory mechanics due to continuous positive airway pressure (CPAP).
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