What are the interventions for a patient with cyanosis and acute respiratory failure?

• A. Place them supine and monitor.
• B. Sit them up and put them on O2.
• C. Administer diuretics.
• D. Perform chest physiotherapy.

Answer: (B)

When a patient has cyanosis with acute respiratory failure, the immediate goal is to improve oxygenation. Positioning the patient upright and providing supplemental oxygen directly address the cause of the cyanosis—low arterial oxygen. Sitting up enhances lung expansion, diaphragmatic movement, and ventilation–perfusion matching, which helps more air reach the better-ventilated parts of the lungs and reduces the work of breathing. Oxygen therapy raises the amount of oxygen carried in the blood, counteracting hypoxemia and the visible cyanosis.

Keeping the patient supine can worsen ventilation in certain lung regions and makes breathing more effortful, so it is not as effective in this situation. Diuretics target fluid overload and pulmonary edema, but they aren’t an immediate fix for hypoxemia and can cause adverse effects if not clearly indicated. Chest physiotherapy can aid mucus clearance when secretions are present but does not rapidly correct the low oxygen levels seen in acute respiratory failure.

So, the best initial approach is to sit the patient up and administer supplemental oxygen, with ongoing monitoring and escalation of support if oxygenation does not improve.