The nurse is administering low dose dopamine to a client who is in septic shock. Which physiologic parameter should the nurse use to evaluate a therapeutic response to the dopamine?

• Increase the fraction of inspired oxygen (FiO₂). The client has severe COVID pneumonia and is on mechanical ventilation with high inspiratory pressures, suggesting acute respiratory distress syndrome (ARDS). Increasing FiO₂ is indicated if oxygenation is inadequate (e.g., low PaO₂ or SpO₂). However, oxygen toxicity should be avoided, so adjustments should be made based on arterial blood gases (ABGs) and oxygen saturation.
• Collect equipment for a needle aspiration. Needle aspiration is typically used for pneumothorax management, but there is no mention of clinical signs such as sudden hypotension, absent breath sounds, or tracheal deviation. While ventilated COVID-19 patients are at risk for barotrauma, this procedure is not justified without evidence of pneumothorax.
• Replace the ventilator. There is no indication that the ventilator is malfunctioning or that the settings are inappropriate. If ventilation issues arise (e.g., high plateau pressures, auto-PEEP, or ventilator asynchrony), adjustments to settings, sedation, or lung-protective strategies should be considered before replacing the ventilator.
• Measure the nasogastric tube output. The client is intubated and sedated, meaning they cannot protect their airway or tolerate oral intake. A nasogastric (NG) tube is commonly placed for gastric decompression and feeding. Monitoring NG output is essential to assess for gastrointestinal bleeding, ileus, or high residual volumes, which can affect feeding tolerance.
• Place the client in Trendelenburg. The Trendelenburg position increases the risk of aspiration, impairs lung expansion, and worsens ventilation-perfusion mismatch, especially in ARDS patients. Instead, prone positioning is often preferred in severe COVID pneumonia to improve oxygenation and alveolar recruitment.

A. Turn off the pacemaker. Turning off the pacemaker is not appropriate because the client has a third-degree heart block, which means their heart is not conducting impulses properly. Disabling the pacemaker could lead to severe bradycardia or asystole. The goal is to troubleshoot the issue rather than stopping pacing altogether.
B. Check the sensitivity control. Loss of sensing means the pacemaker is not detecting the client's intrinsic heart activity, which can lead to inappropriate pacing or failure to respond to the heart’s natural rhythm. Adjusting the sensitivity setting ensures that the pacemaker can recognize the client's heartbeats and pace appropriately. This is the first step in troubleshooting pacemaker malfunctions related to sensing issues.
C. Increase the milliamps (mA). Increasing the milliamps (mA) is used when there is failure to capture, meaning the pacemaker is delivering impulses but the heart is not responding. Since the problem here is failure to sense, adjusting the sensitivity setting is the correct first action.
D. Position the client on the left side. Repositioning the client is sometimes recommended for displacement of a transvenous pacemaker lead, but in this case, the issue is sensing failure, not lead displacement. Checking and adjusting the pacemaker settings is a more appropriate first step before considering repositioning.