A client is admitted to the critical care unit (CCU) with a third degree complete heart block. A temporary transvenous pacemaker is inserted by the healthcare provider (HCP). An hour after pacemaker insertion, the device stops sensing the client's intrinsic heart rate. Which action should the nurse implement first?
Turn off the pacemaker.
Check the sensitivity control.
Increase the milliamps (mA).
Position the client on the left side.
The Correct Answer is B
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
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.
Correct Answer is A
Explanation
A. Administer a PRN bolus normal saline. The client is exhibiting signs of hypovolemic shock, including tachycardia (HR 110 bpm), tachypnea (RR 24), and hypotension (BP 80/50 mmHg) following massive gastrointestinal bleeding and multiple blood transfusions. Immediate fluid resuscitation with a normal saline bolus is the priority to restore intravascular volume, maintain perfusion, and prevent further deterioration.
B. Obtain a blood specimen for hematocrit. While monitoring hematocrit is important to assess ongoing blood loss, it does not take priority over treating the client’s current hypovolemia. A delay in resuscitation could worsen hypotension, decrease organ perfusion, and lead to shock.
C. Measure strict hourly urinary output. Monitoring urine output is important in assessing renal perfusion and fluid balance, but the client’s immediate need is volume replacement. If fluid resuscitation is delayed, renal perfusion could worsen, leading to acute kidney injury.
D. Switch oxygen delivery to a face mask. The client’s oxygen saturation is 94% on 4 L/min nasal cannula, indicating adequate oxygenation at this time. Increasing oxygen delivery is not immediately necessary compared to fluid resuscitation. However, if the client’s condition worsens, oxygen therapy adjustments may be needed.
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