A nurse is caring for a client with severe mitral stenosis who is scheduled for mitral valve replacement surgery. Which nursing intervention should be the priority in the preoperative period?

Monitoring for pulmonary edema is the priority due to mitral stenosis causing left atrial pressure elevation and pulmonary congestion. Other interventions like education or deep breathing are important but less urgent preoperatively.

Understanding the Priority: Airway and Breathing in Severe Mitral Stenosis

The correct answer is to monitor for signs of pulmonary edema and maintain oxygen saturation above 92%. In a client with severe mitral stenosis, the core pathophysiological problem is a mechanical obstruction to blood flow from the left atrium to the left ventricle. This obstruction creates a back-pressure effect, leading to increased pressure in the pulmonary vasculature. The left atrium, facing a narrowed valve, struggles to empty, causing blood to pool and pressure to rise retrograde into the pulmonary veins and capillaries. This elevated hydrostatic pressure forces fluid into the pulmonary interstitium and alveoli, resulting in pulmonary edema, a life-threatening condition that directly impairs gas exchange.

Applying the nursing process and Maslow’s hierarchy of needs, physiological integrity takes precedence, and within that, the ABCs (Airway, Breathing, Circulation) are paramount. Before addressing education, preventing future thromboembolic events, or teaching postoperative exercises, the nurse must first stabilize the client’s immediate, life-threatening risk of respiratory failure. The primary concern preoperatively is that any factor increasing cardiac output or heart rate—such as anxiety, pain, or fever—can worsen the pressure gradient across the stenotic valve, precipitating acute pulmonary edema. Monitoring oxygen saturation and assessing for early signs of pulmonary edema (e.g., crackles, dyspnea, frothy sputum) are critical nursing actions to detect and manage this rapid deterioration .

Why the Other Options Are Not the Priority

- Option 2 (Deep breathing and ambulation): While incentive spirometry and early mobility are vital components of Enhanced Recovery After Surgery (ERAS) protocols to prevent postoperative atelectasis and pneumonia, they are not the immediate preoperative priority for a client with a structurally compromised heart at high risk for acute decompensation . The client’s activity tolerance is likely very limited due to dyspnea, and ambulation could dangerously increase myocardial oxygen demand and pulmonary congestion.
- Option 3 (Administer anticoagulants): Anticoagulation is a key consideration, particularly if the client has concurrent atrial fibrillation, to prevent thromboembolic events like stroke. However, this addresses a potential future complication (circulation) rather than the immediate and direct threat to breathing. Furthermore, the risk of a thromboembolic event, while serious, is not as acutely life-threatening as the inability to oxygenate due to fulminant pulmonary edema .
- Option 4 (Provide detailed education): Preoperative education is essential for informed consent and reducing anxiety, which can indirectly affect hemodynamics. However, it is a psychosocial and safety need that is secondary to a critical physiological problem. A client in respiratory distress cannot effectively learn. The nurse must first ensure the client is physiologically stable before proceeding with comprehensive teaching.

Connecting to Perioperative Management

The rationale for this priority is reinforced by the multidisciplinary approach to cardiac surgery. A key goal of the heart team during the perioperative period is to optimize the patient’s hemodynamic and respiratory status to prevent complications that could delay surgery or worsen outcomes . For a patient with mitral stenosis, this optimization centers on controlling pulmonary congestion. The nurse’s vigilant monitoring and interventions to maintain an oxygen saturation above 92% are foundational to this process. This directly mitigates the risk of the severe complication described in surgical contexts, where myocardial tissue integrity and hemodynamic stability are paramount to prevent events like atrioventricular groove hematoma or cardiac rupture . A patient who is hypoxic and in pulmonary edema is a profoundly unstable surgical candidate. Therefore, the nursing priority is to recognize that the stenotic valve’s most immediate threat is backward failure into the lungs, making respiratory assessment and support the non-negotiable first step.