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Difficulty: Very hardReduction of Risk Potential

A nurse in the intensive care unit is caring for a client with acute respiratory distress syndrome (ARDS) who is mechanically ventilated. The most recent assessment reveals a mean arterial pressure (MAP) of 54 mm Hg54 \text{ mm Hg} and arterial blood gas (ABG) values showing: pH=7.25pH = 7.25, PaCO2=62 mm HgPaCO_2 = 62 \text{ mm Hg}, HCO3−=25 mEq/LHCO_3^- = 25 \text{ mEq/L}, and PaO2=54 mm HgPaO_2 = 54 \text{ mm Hg} on an FiO2FiO_2 of 0.800.80. To reduce the risk of further physiological deterioration, which of the following interventions should the nurse implement? Select all that apply.

  1. Prepare to initiate prescribed prone positioning therapy.Answer
  2. B
    Administer a prescribed intravenous bolus of sodium bicarbonate to correct the acidosis.
  3. C
    Maintain the client in a continuous supine position to facilitate endotracheal suctioning.
  4. Prepare to administer a prescribed continuous infusion of a neuromuscular blocking agent.Answer
  5. E
    Collaborate with the respiratory therapist to increase the positive end-expiratory pressure (PEEP) to treat the hypoxemia.
  6. Implement a prescribed conservative fluid management strategy to achieve a negative fluid balance.Answer

Answer

The correct interventions are: preparing to initiate prescribed prone positioning therapy, preparing to administer a prescribed continuous infusion of a neuromuscular blocking agent, and implementing a prescribed conservative fluid management strategy to achieve a negative fluid balance.
In severe ARDS, the primary goals are to improve oxygenation while maintaining hemodynamic stability. Prone positioning recruits collapsed posterior alveoli and improves ventilation-perfusion matching. Neuromuscular blocking agents eliminate patient-ventilator dyssynchrony and reduce cellular oxygen consumption. A conservative fluid management strategy reduces pulmonary edema, which improves lung compliance. All of these evidence-based actions directly reduce the risk of further physiological decompensation.

Step-by-Step Solution

1
Analyze the arterial blood gas (ABG) results and the client's hemodynamic status.
The ABG reveals uncompensated respiratory acidosis and severe hypoxemia. The MAP of 54 mm Hg54 \text{ mm Hg} indicates clinically significant hypotension and shock.
Accurate interpretation of physiological data is essential to identify the risks of cardiopulmonary collapse before selecting interventions.
2
Evaluate the safety of adjusting mechanical ventilation settings.
Increasing PEEP is rejected due to the risk of worsening the client's hypotension.
High intrathoracic pressure from PEEP impedes venous return, which will exacerbate existing shock.
3
Evaluate positioning strategies for a client with severe hypoxemia.
Prone positioning is selected over the continuous supine position.
Prone positioning redistributes pulmonary blood flow and recruits dependent alveoli, significantly improving oxygenation.
4
Determine appropriate pharmacological and fluid management interventions.
Neuromuscular blockade and conservative fluid management are selected, while sodium bicarbonate is rejected.
Paralytics reduce oxygen demand, and fluid restriction minimizes pulmonary edema. Sodium bicarbonate is contraindicated because it generates additional carbon dioxide, worsening respiratory acidosis.

Key Concept

Management of severe Acute Respiratory Distress Syndrome (ARDS) and reduction of physiological complications
Estimated Time:2m 30s
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Topics

Reduction of Risk Potential

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