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Zorluk: ZorPhysiological Adaptation

While managing the care of a critically ill client diagnosed with severe sepsis, the nurse monitors for the complication of acute respiratory distress syndrome (ARDS). Which specific assessment findings signify that the client has entered the early stages of this pulmonary complication? Select all that apply.

  1. Arterial oxygen tension (PaO2) of 54 mm Hg (7.2 kPa) despite oxygen therapy via a non-rebreather maskCevap
  2. B
    Initial arterial blood gas analysis indicating respiratory acidosis
  3. C
    Pulmonary artery wedge pressure (PAWP) of 22 mm Hg
  4. Chest radiograph revealing diffuse, bilateral pulmonary opacitiesCevap
  5. Sudden onset of severe tachypnea and use of accessory musclesCevap

Cevap

The correct findings indicating early-stage ARDS are a PaO2 of 54 mm Hg despite high-flow oxygen, bilateral diffuse opacities on the chest radiograph, and a sudden onset of severe tachypnea with accessory muscle use.
The diagnosis of early-stage ARDS is supported by the presence of refractory hypoxemia (low PaO2 despite high oxygen delivery), diffuse bilateral pulmonary opacities on a chest radiograph due to increased capillary permeability, and early clinical signs of respiratory distress such as sudden tachypnea and accessory muscle use.

Adım Adım Çözüm

1
Recall the pathophysiology and diagnostic criteria for acute respiratory distress syndrome (ARDS).
ARDS is a form of non-cardiogenic pulmonary edema characterized by widespread inflammation, increased capillary permeability, and loss of surfactant, leading to alveolar collapse.
Understanding the underlying mechanism distinguishes ARDS from cardiogenic causes of respiratory failure.
2
Analyze the options for early clinical manifestations of ARDS.
Early signs include severe tachypnea, increased work of breathing, and respiratory alkalosis due to hyperventilation. The chest radiograph will show bilateral opacities.
Identifying timeline-specific symptoms is critical, as manifestations change (e.g., progression from respiratory alkalosis to respiratory acidosis) as the condition worsens.
3
Evaluate the hemodynamic and oxygenation indicators associated with ARDS.
Refractory hypoxemia is present, meaning PaO2 remains low despite high FiO2. The pulmonary artery wedge pressure (PAWP) should be normal (less than 18 mm Hg) because the edema is non-cardiogenic.
Hemodynamic parameters like PAWP definitively differentiate ARDS from left-sided heart failure and cardiogenic shock.

Anahtar Kavram

Acute Respiratory Distress Syndrome (ARDS) Pathophysiology and Assessment
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Konular

Physiological Adaptation

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