The nurse is caring for a client who has a fluid-volume overload related to heart failure (HF) and is admitted to the nursing unit for treatment. Vital signs are: Temperature: 98.0 oral Heart rate (HR) 88 beats/minute Respiratory rate (RR) 22 breaths/minute Oxygen saturation: 94% on room air What is the PRIORITY nursing action?

A. Insert a 20-gauge peripheral IV catheter: Establishing venous access is necessary for administering intravenous diuretics but is not the most immediate action. Assessment of the clinical status must precede invasive interventions to determine the severity of the fluid overload. The nurse should prioritize gathering objective data on respiratory compromise before performing venipuncture. B. Administer oxygen at 2 liters per minute via nasal cannula: The current oxygen saturation is 94% on room air, which is generally considered acceptable for many patients. While supplemental oxygen may be indicated later, it is not the most critical first step given these stable saturation levels. Respiratory assessment should guide the necessity and titration of oxygen therapy. C. Place the client on a cardiac monitor: Continuous cardiac monitoring is important for detecting arrhythmias associated with heart failure or electrolyte shifts. However, it does not provide immediate information regarding the patient's primary risk of pulmonary congestion or respiratory distress. Monitoring is an adjunctive task rather than the primary diagnostic priority. D. Auscultate the client's breath sounds: Assessing for crackles or diminished sounds is the priority to determine the extent of pulmonary edema. This assessment provides immediate data on the severity of the fluid-volume overload and the risk of respiratory failure. Objective respiratory findings are essential for prioritizing subsequent medical and nursing interventions.