Question

Difficulty: HardReduction of Risk Potential

An intensive care nurse evaluates a critically ill client being treated for severe viral pneumonia. Over the past 30 minutes, the client has become increasingly agitated and disoriented. Current vital signs reveal a heart rate of 126 beats/min, a respiratory rate of 34 breaths/min, and a blood pressure of 98/78 mm Hg. Stat arterial blood gas (ABG) analysis on a non-rebreather mask demonstrates a pH of 7.26, PaCO2PaCO_2 of 64 mm Hg, PaO2PaO_2 of 52 mm Hg, and HCO3−HCO_3^- of 24 mEq/L. What is the most appropriate action by the nurse to mitigate the risk of immediate cardiorespiratory arrest?

  1. Assemble the necessary equipment for immediate rapid sequence intubation and mechanical ventilation.Answer
  2. B
    Administer a continuous intravenous infusion of sodium bicarbonate to resolve the client's metabolic acidosis.
  3. C
    Administer a prescribed intravenous sedative to manage the agitation and decrease the client's myocardial oxygen demand.
  4. D
    Lower the head of the bed to a flat, supine position to promote venous return and increase cerebral perfusion.

Answer

The nurse must assemble the necessary equipment for immediate rapid sequence intubation and mechanical ventilation.
The correct action is to prepare for immediate intubation and mechanical ventilation. The client's profound hypoxemia (PaO2PaO_2 of 52 mm Hg despite high-flow oxygen via a non-rebreather mask), severe uncompensated respiratory acidosis (pH 7.26, PaCO2PaCO_2 64 mm Hg), and signs of impending shock (narrowing pulse pressure of 20 mm Hg, agitation, tachycardia) indicate acute respiratory failure. Securing the airway and providing mechanical ventilation is the most critical intervention to mitigate the risk of imminent cardiorespiratory arrest.

Step-by-Step Solution

1
Analyze the arterial blood gas (ABG) results.
The ABG reveals uncompensated respiratory acidosis (low pH, high PaCO2PaCO_2, normal HCO3−HCO_3^-) and severe, refractory hypoxemia (PaO2PaO_2 52 mm Hg on a non-rebreather mask).
Accurate ABG interpretation is essential to identify the underlying physiological disturbance causing the client's clinical decline.
2
Evaluate the client's vital signs and neurological status for systemic complications.
The narrowing pulse pressure (20 mm Hg), marked tachycardia, tachypnea, and new-onset agitation indicate impending physiological shock secondary to profound tissue hypoxia.
Recognizing early signs of shock and hypoxia prevents the administration of contraindicated medications, such as sedatives, which would mask symptoms and suppress respiratory drive.
3
Determine the highest priority intervention to reduce the risk of cardiorespiratory arrest.
Immediate airway control and positive pressure ventilation are required.
The client is failing non-invasive oxygenation strategies and is in imminent danger of respiratory collapse. Airway and breathing interventions must take precedence over other actions.

Key Concept

Prioritizing airway management in clients with uncompensated respiratory acidosis and impending shock
Rate this question