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The nurse is caring for a patient who has acute pancreatitis and the mixed venous oxygen saturation (SvO2) is decreasing. Which of the following parameters should the nurse assess to determine the possible cause of the decreased SvO2?
- A. Weight
- B. Amylase
- C. Temperature
- D. Urinary output
Correct Answer: C
Rationale: Elevated temperature increases metabolic demands and oxygen use by tissues, resulting in a drop in oxygen saturation of mixed venous blood. Information about the patient's weight, urinary output, and amylase will not help in determining the cause of the patient's drop in SvO2.
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The nurse notes that a patient's endotracheal tube (ET), which was at the 21-cm mark, is now at the 24-cm mark and the patient appears anxious and restless. Which of the following actions should the nurse take first?
- A. Listen to the patient's lungs.
- B. Offer reassurance to the patient.
- C. Bag the patient at an FIO2 of 100%.
- D. Notify the patient's health care provider.
Correct Answer: A
Rationale: The nurse should first determine whether the ET tube has been displaced into the right mainstem bronchus by listening for unilateral breath sounds. If so, assistance will be needed to reposition the tube immediately. The other actions also are appropriate, but detection and correction of tube malposition are the most critical actions.
The nurse is caring for a patient who has an intra-aortic balloon pump in place. Which of the following actions should be included in the plan of care?
- A. Avoid the use of anticoagulant medications.
- B. Keep the head of the bed elevated 45 degrees.
- C. Measure the patient's urinary output every hour.
- D. Provide passive range of motion for all extremities.
Correct Answer: C
Rationale: Monitoring urine output will help determine whether the patient's cardiac output has improved and also help monitor for balloon displacement. The head of the bed should be no higher than 30 degrees. Heparin is used to prevent thrombus formation. Limited movement is allowed for the extremity with the balloon insertion site to prevent displacement of the balloon.
The intensive care unit nurse educator is teaching a new staff nurse about hemodynamic monitoring. Which of the following actions indicates that the teaching has been effective?
- A. Positions the zero-reference stopcock line level with the phlebostatic axis.
- B. Balances and calibrates the hemodynamic monitoring equipment every hour.
- C. Rechecks the location of the phlebostatic axis when changing the patient's position.
- D. Ensures that the patient is lying supine with the head of the bed flat for all readings.
Correct Answer: A
Rationale: For accurate measurement of pressures, the zero-reference level should be at the phlebostatic axis. There is no need to rebalance and recalibrate monitoring equipment hourly. Accurate hemodynamic readings are possible with the patient's head raised to 45 degrees or in the prone position. The anatomic position of the phlebostatic axis does not change when patients are repositioned.
The nurse notes thick, white respiratory secretions from a patient who is receiving mechanical ventilation. Which of the following interventions will be most effective in resolving this problem?
- A. Suction the patient every hour.
- B. Reposition the patient every 2 hours.
- C. Add additional water to the patient's enteral feedings.
- D. Instill 5 ml of sterile saline into the endotracheal tube (ET) before suctioning.
Correct Answer: C
Rationale: Because the patient's secretions are thick, better hydration is indicated. Suctioning every hour without any specific evidence for the need will increase the incidence of mucosal trauma and would not address the etiology of the ineffective airway clearance. Instillation of saline does not liquefy secretions and may decrease the SpO2. Repositioning the patient is appropriate but will not decrease the thickness of secretions.
A patient has a nursing diagnosis of disturbed sleep pattern related to difficulty maintaining sleep state. Which of the following actions should the nurse include in the plan of care?
- A. Discontinue assessments during the night to allow uninterrupted sleep.
- B. Administer prescribed sedatives or opioids at bedtime to promote sleep.
- C. Silence monitor alarms to allow 30- to 40-minute rest periods.
- D. Cluster nursing activities so that the patient has uninterrupted rest periods.
Correct Answer: D
Rationale: Clustering nursing activities and providing uninterrupted rest periods will minimize sleep-cycle disruption. Sedative and opioid medications tend to decrease the amount of rapid eye movement (REM) sleep and can contribute to sleep disturbance and disturbed sensory perception. Silencing the alarms on the cardiac monitors would be unsafe in a critically ill patient, as would discontinuing assessments during the night.