What might be the advantages of NMB in a ventilated patient? (Select all that apply)

A. One of the main indications for NMB in mechanically ventilated patients is to improve patient-ventilator synchrony. Some patients may fight the ventilator, causing “bucking” or asynchronous breaths, which can increase work of breathing, elevate airway pressures, and compromise gas exchange. NMB temporarily paralyzes skeletal muscles, eliminating involuntary movements and allowing the ventilator to deliver precise tidal volumes with minimal resistance. This can improve oxygenation and reduce the risk of ventilator-induced lung injury (VILI). B. NMB does not increase peak airway pressures; in fact, it often reduces them. By relaxing the chest wall and diaphragm, NMB allows more uniform lung expansion, decreasing the pressure needed to deliver the set tidal volume. Higher peak airway pressures are typically harmful and may contribute to barotrauma or volutrauma. C. NMB reduces oxygen consumption by paralyzing skeletal muscles and preventing excessive work of breathing. Normally, active respiratory muscles and accessory muscles consume significant oxygen, especially in patients with severe respiratory distress. NMB decreases metabolic demand, conserving oxygen for vital organs and improving systemic oxygen delivery. D. By improving ventilator synchrony, reducing oxygen consumption, and allowing for more efficient alveolar ventilation, NMB can enhance oxygenation and tissue oxygen delivery. This is particularly important in patients with acute respiratory distress syndrome (ARDS) or severe hypoxemia, where optimizing oxygen delivery is critical to prevent organ dysfunction. E. NMB relaxes all skeletal muscles, including the intercostal and accessory respiratory muscles, resulting in better chest wall compliance. This facilitates even distribution of tidal volumes, reduces localized overdistension, improves alveolar recruitment, and decreases the risk of ventilator-induced lung injury. Improved compliance allows the ventilator to work more effectively, providing adequate ventilation at lower pressures.