What role do noninvasive ventilation and oxygen therapy play in ADHF with respiratory distress?

• A. NIV reduces work of breathing and improves oxygenation in cardiogenic pulmonary edema; oxygen as needed.
• B. Invasive ventilation is always required.
• C. Oxygen should never be used.
• D. NIV worsens outcomes.

Answer: (A)

In acute decompensated heart failure with respiratory distress from cardiogenic pulmonary edema, noninvasive ventilation (NIV) provides positive airway pressure that makes breathing easier and improves oxygen delivery. By delivering CPAP or BiPAP, NIV increases lung volumes, helps reopen collapsed alveoli, and improves ventilation-perfusion matching. This reduces the work of breathing and often lowers the heart’s filling pressures, which helps relieve pulmonary edema and further improves oxygenation.

Oxygen therapy complements NIV by correcting hypoxemia. It should be titrated to keep oxygen saturation in a target range (typically about 92–96%), avoiding excessive oxygen that can worsen vasoconstriction or oxygen toxicity in some patients.

NIV is especially valuable because it can avert endotracheal intubation and its risks, provided the patient is cooperative, hemodynamically stable, and able to protect the airway. If NIV is not effective within a short time or if there are contraindications (for example, inability to protect the airway, severe agitation, or deteriorating consciousness), escalation to invasive ventilation may be necessary.

So the best approach is using NIV to reduce work of breathing and improve oxygenation, with oxygen therapy as needed to maintain adequate oxygen levels.