Which of the following is a true statement? A) It has not been demonstrated that recruitment maneuvers in obese, mechanically ventilated patients are effective at improving respiratory system compliance and oxygenation without affecting hemodynamics. B) It is not advisable to perform a recruitment maneuver whenever PEEP is increased or after temporary PEEP discontinuation. C) It has been shown that the elevation of the head of bed is effective at improving respiratory system compliance, oxygenation, reducing expiratory flow limitation, and reducing PEEP requirements for optimal ventilation in obese patients. D) PEEP should be weaned before FiO₂ and pressure support level is decreased.

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It has been demonstrated in intraoperative settings that recruitment maneuvers in obese, mechanically ventilated patients are effective at improving respiratory system compliance and oxygenation without affecting hemodynamics. This effect is due to the reversal of atelectasis which forms during induction and which persists without adequate levels of PEEP during mechanical ventilation. It is advisable to perform a recruitment maneuver whenever PEEP is increased or after temporary PEEP discontinuation. It has been shown that the elevation of the head of bed is effective at improving respiratory system compliance, oxygenation, reducing expiratory flow limitation, and reducing PEEP requirements for optimal ventilation in obese patients. FiO₂ and pressure support level should always be weaned before PEEP level is decreased.

Which of the Following Is a True Statement