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Difficulty: MediumPhysiological Adaptation

A hospitalized individual with community-acquired pneumonia is currently receiving supplemental oxygen via nasal cannula at 2 L/min2\text{ L/min}. During hourly rounds, the nursing staff observes that the individual has become highly restless, confused, and is utilizing accessory muscles to breathe.

ParameterCurrent Value
Heart rate122 bpm122\text{ bpm}
Respiratory rate32 breaths/min32\text{ breaths/min}
Blood pressure148/88 mm Hg148/88\text{ mm Hg}
Oxygen saturation84%84\%
ABG ComponentResultReference Range
pH\text{pH}7.267.267.35−7.457.35 - 7.45
PaCO2\text{PaCO}_266 mm Hg66\text{ mm Hg}35−45 mm Hg35 - 45\text{ mm Hg}
PaO2\text{PaO}_254 mm Hg54\text{ mm Hg}80−100 mm Hg80 - 100\text{ mm Hg}
HCO3−\text{HCO}_3^-24 mEq/L24\text{ mEq/L}22−26 mEq/L22 - 26\text{ mEq/L}

Which action represents the priority intervention for this individual?

  1. A
    Increase the nasal cannula flow rate to 6 L/min6\text{ L/min} and reassess the respiratory status in 15 minutes15\text{ minutes}.
  2. B
    Administer the prescribed as-needed intravenous anxiolytic medication to reduce the client's severe restlessness.
  3. C
    Infuse a rapid bolus of isotonic crystalloids to manage the elevated heart rate and impending shock.
  4. Notify the healthcare provider immediately and prepare the room for emergent airway management.Answer

Answer

The priority intervention is to notify the healthcare provider immediately and prepare for emergent airway management (intubation).
The correct answer involves recognizing that the individual is in acute respiratory failure. The ABG reveals severe uncompensated respiratory acidosis with significant hypoxemia. Combined with clinical signs of increased work of breathing and altered mental status, this indicates impending respiratory collapse. The priority is to secure the airway and provide mechanical ventilation.

Step-by-Step Solution

1
Analyze the arterial blood gas values and vital signs.
The ABG indicates uncompensated respiratory acidosis (pH<7.35\text{pH} < 7.35, elevated PaCO2\text{PaCO}_2) with severe hypoxemia (PaO2<60 mm Hg\text{PaO}_2 < 60\text{ mm Hg}).
Understanding the physiological state is crucial for identifying acute decompensation and prioritizing interventions.
2
Correlate laboratory findings with the physical assessment data.
The client's severe restlessness, confusion, and use of accessory muscles are direct physiological responses to severe oxygen deprivation and carbon dioxide retention.
Restlessness and confusion are hallmark early neurological signs of profound hypoxia.
3
Determine the most appropriate and definitive nursing intervention.
The client is in acute respiratory failure and requires immediate positive pressure ventilation or intubation.
Conservative measures (like increasing a nasal cannula) are no longer sufficient, and delaying advanced airway interventions could lead to respiratory arrest.

Key Concept

Acute Respiratory Failure and ABG Interpretation
Estimated Time:1m 0s
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Topics

Physiological Adaptation

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