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Zorluk: ZorPhysiological Adaptation

An emergency department nurse is evaluating a client who presented 45 minutes ago with a severe asthma exacerbation. Initially, the client exhibited profound expiratory wheezing, use of accessory muscles, and a respiratory rate of 34 breaths per minute. Currently, the nurse notes that the client is becoming increasingly lethargic, the respiratory rate has decreased to 14 breaths per minute, and breath sounds are notably diminished bilaterally. An arterial blood gas (ABG) analysis reveals a pH of 7.29, PaCO2 of 54 mm Hg, HCO3 of 24 mEq/L, and PaO2 of 62 mm Hg. Which of the following is the most appropriate interpretation and corresponding priority action?

  1. Uncompensated respiratory acidosis indicating impending respiratory failure; prepare for immediate advanced airway management.Cevap
  2. B
    Uncompensated metabolic acidosis resulting from lactic acid buildup; prepare to administer an intravenous sodium bicarbonate infusion.
  3. C
    Clinical improvement evidenced by decreased wheezing and respiratory rate; maintain current continuous bronchodilator therapy.
  4. D
    Uncompensated respiratory alkalosis due to initial tachypnea; administer a prescribed intravenous anxiolytic medication.

Cevap

The clinical findings and ABG indicate uncompensated respiratory acidosis and impending respiratory failure, requiring preparation for immediate advanced airway management.
The client is exhibiting signs of a 'silent chest,' a critical and life-threatening complication of severe asthma. As respiratory muscles fatigue, the respiratory rate drops, and airflow becomes so restricted that wheezing is no longer audible. This clinical picture, accompanied by lethargy, indicates severe carbon dioxide retention and impending respiratory arrest. The ABG confirms uncompensated respiratory acidosis (pH < 7.35, PaCO2 > 45 mm Hg, normal HCO3). The highest priority action is to prepare for immediate advanced airway management (endotracheal intubation and mechanical ventilation) to prevent cardiopulmonary arrest.

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1
Analyze the clinical presentation trend.
The client transitioned from tachypnea and profound wheezing to lethargy, a decreased respiratory rate, and diminished breath sounds.
Identifying changes in clinical status is crucial for detecting a 'silent chest,' which indicates severe airflow obstruction and respiratory muscle fatigue.
2
Interpret the arterial blood gas (ABG) values.
pH is 7.29 (acidosis), PaCO2 is 54 mm Hg (respiratory origin), and HCO3 is 24 mEq/L (normal, uncompensated).
ABG analysis confirms the physiological state of uncompensated respiratory acidosis due to profound carbon dioxide retention.
3
Determine the priority nursing intervention based on the synthesis of data.
Prepare for immediate advanced airway management, such as endotracheal intubation.
The combination of uncompensated respiratory acidosis and clinical signs of respiratory muscle fatigue requires immediate mechanical ventilation to sustain life and reverse the hypoxemia and hypercapnia.

Anahtar Kavram

Recognition and management of impending respiratory failure ('silent chest') in severe asthma exacerbations.
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Konular

Physiological Adaptation

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