Preoxygenation and Hemodynamics With Bag-valve-mask and Noninvasive Mechanical Ventilation

A BVM equipped with an oxygen reservoir, coupled with a correctly fitted oronasal mask was used.

Preoxygenation was conducted over a three-minute period using NIMV employing a properly fitted oronasal mask. This was facilitated by a mechanical ventilator operating in pressure support mode. The preoxygenation protocol entailed the administration of 100% FiO2, applying Positive End-Expiratory Pressure set at 5 cmH2O, delivering breaths at a frequency of 15 per minute, and providing a tidal volume ranging between 6 to 8 ml/kg of body weight.