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Question

Difficulty: MediumPhysiological Adaptation

While reviewing the chart of a client hospitalized with severe bilateral pneumonia, the central monitor alarms. The nurse enters the room and observes the client is highly agitated, diaphoretic, and increasingly confused. The client is currently receiving oxygen therapy via a non-rebreather mask at 15 L/min. Current vitals indicate a heart rate of 134 bpm, blood pressure of 84/46 mmHg, respiratory rate of 38 breaths/min, and an oxygen saturation of 84%. A stat arterial blood gas (ABG) is drawn and reports: pH 7.21, PaCO2 68 mm Hg, PaO2 50 mm Hg, and HCO3- 23 mEq/L. Which action is the priority for this client?

  1. Prepare the client for immediate endotracheal intubation and mechanical ventilation.Answer
  2. B
    Administer a prescribed intravenous push of sodium bicarbonate.
  3. C
    Increase the primary intravenous fluid rate to address the decreasing blood pressure.
  4. D
    Instruct the client to take slow, deep breaths while maintaining a high Fowler's position.

Answer

Prepare the client for immediate endotracheal intubation and mechanical ventilation.
The correct action directly addresses the most critical and life-threatening issue. The ABG results demonstrate uncompensated respiratory acidosis and severe hypoxemia despite maximum non-invasive oxygen delivery (non-rebreather at 15 L/min). Coupled with the client's altered mental status (confusion, agitation) and hemodynamic instability (hypotension, tachycardia), the client has exhausted their compensatory mechanisms and is in acute respiratory failure. The priority is to secure the airway and mechanically ventilate.

Step-by-Step Solution

1
Analyze the client's physical assessment findings.
The client is agitated, confused, diaphoretic, tachypneic (38 breaths/min), tachycardic (134 bpm), and hypotensive (84/46 mmHg).
Identifying these clinical manifestations points toward severe hypoxemia and inadequate tissue perfusion, suggesting the client is in a life-threatening physiological crisis.
2
Interpret the arterial blood gas (ABG) results in the context of the oxygen therapy.
pH 7.21 (acidosis), PaCO2 68 (respiratory cause), HCO3- 23 (normal/uncompensated), and PaO2 50 (severe hypoxemia) despite being on 15 L/min via non-rebreather.
This confirms acute uncompensated respiratory acidosis with refractory hypoxemia. The client's respiratory effort is failing to adequately ventilate or oxygenate.
3
Prioritize nursing interventions based on the ABCs (Airway, Breathing, Circulation).
Airway and Breathing are severely compromised and must be addressed first before Circulation (fluids).
Because the client cannot maintain oxygenation on maximum non-invasive support and has an altered level of consciousness, mechanical ventilation is the immediate life-saving priority.

Key Concept

Prioritization of advanced airway management in acute uncompensated respiratory acidosis with refractory hypoxemia.
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Topics

Physiological Adaptation

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