What are the most common early manifestations of acute respiratory distress syndrome that a nurse will assess in a patient?

A. Bradycardia and increased work of breathing: Bradycardia is not typically an early sign of ARDS; it may develop later due to hypoxia or cardiac compromise. Increased work of breathing can occur, but bradycardia is not a reliable early manifestation. B. Cyanosis and apprehension: Cyanosis and anxiety may appear as ARDS progresses and hypoxemia worsens, but these are usually later signs after respiratory compromise has advanced. Early recognition relies on subtler, more common findings. C. Dyspnea and tachypnea: Dyspnea (shortness of breath) and tachypnea (rapid breathing) are the most common early manifestations of ARDS. They reflect impaired gas exchange from alveolar-capillary membrane injury and pulmonary edema. Early recognition of these signs allows prompt intervention to prevent progression to severe hypoxemia. D. Respiratory distress and frothy sputum: Frothy sputum is more characteristic of cardiogenic pulmonary edema rather than ARDS. While respiratory distress is present, frothy sputum is not a typical early finding in ARDS, which initially presents with subtle hypoxemia and increased respiratory effort.