Sigh breaths could be beneficial during which of the following situations?
a. Continuous positive airway pressure (CPAP) used for the treatment of hy-poxemia.
b. Mechanical ventilation with VTS = 8-10 mL/kg.
c. Ventilating acute respiratory distress syn-drome (ARDS) patient with plateau pres-sure Pplateau >30 cm H2O.
d. Pressure-supported ventilation with tidal volume (VT) = 4-6 mL/kg
ANS: D
Sigh breaths are not indicated for patients on continuous positive airway pressure (CPAP) for hypoxemia because it may be harmful. Sighs are not recommended for patients being ventilated with tidal volumes >7 mL/kg or in the presence of plateau pressures >30 cm H2O. Sighs may be beneficial to patients who are receiving pressure-supported ventilation and who have low tidal volumes with mild hypoxemia.
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