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Difficulty: EasyGeneral Internal Medicine

A 68-year-old man comes to the emergency department complaining of progressive shortness of breath and an increasingly productive cough over the last 3 days. He notes his sputum has changed from clear to thick and yellowish-green. His medical history is significant for chronic obstructive pulmonary disease (COPD) and a 45-pack-year smoking history. Temperature is 37.6°C (99.7°F), blood pressure is 138/86 mmHg, pulse is 92/min, and respiratory rate is 22/min. Oxygen saturation is 89% on room air. Physical examination reveals a barrel-shaped chest with diffuse bilateral expiratory wheezing and a prolonged expiratory phase. Jugular venous pressure is normal, and there is no lower extremity edema. A bedside chest radiograph demonstrates hyperinflated lungs with flattened diaphragms, but no focal consolidations, pleural effusions, or cardiomegaly. Which of the following is the most appropriate next step in management?

  1. Administer inhaled bronchodilators, systemic corticosteroids, and an oral macrolide antibioticAnswer
  2. B
    Administer intravenous furosemide and initiate noninvasive positive pressure ventilation
  3. C
    Administer intravenous piperacillin-tazobactam and obtain blood cultures
  4. D
    Administer intravenous sodium bicarbonate to correct the anticipated acid-base disturbance
  5. E
    Obtain serum thyroid-stimulating hormone and free thyroxine levels

Answer

The most appropriate next step is to administer inhaled bronchodilators, systemic corticosteroids, and an oral macrolide antibiotic.
The correct answer includes the three mainstays of therapy for an acute exacerbation of chronic obstructive pulmonary disease (COPD) with infectious signs: inhaled bronchodilators (e.g., albuterol and ipratropium), systemic corticosteroids (e.g., oral prednisone), and a targeted antibiotic (e.g., azithromycin or doxycycline). This patient presents with the classic cardinal symptoms of a COPD exacerbation (increased dyspnea, increased sputum volume, and increased sputum purulence). The presence of purulent sputum specifically dictates the need for antibiotic therapy to cover common respiratory pathogens (such as Streptococcus pneumoniae, Haemophilus influenzae, and Moraxella catarrhalis).

Step-by-Step Solution

1
Analyze the patient's clinical presentation and vital signs.
The patient has increased dyspnea, increased sputum volume, and increased sputum purulence (changing to yellowish-green) in the setting of chronic COPD.
Identifying the three cardinal symptoms of an acute exacerbation of COPD determines the need for comprehensive medical therapy.
2
Rule out alternative causes of acute dyspnea using physical exam and imaging.
Heart failure is highly unlikely due to the normal jugular venous pressure, absence of peripheral edema, and a chest radiograph showing only hyperinflation without cardiomegaly or effusions.
Differentiating between a primary pulmonary etiology and a cardiovascular one ensures targeted therapy and avoids harmful interventions like unnecessary diuresis.
3
Determine the appropriate therapeutic interventions based on established guidelines.
Select short-acting bronchodilators, systemic corticosteroids, and targeted, narrow-spectrum antibiotics.
Standard of care for a moderate to severe COPD exacerbation with purulent sputum requires all three modalities to reduce airway inflammation, relieve bronchospasm, and treat the underlying bacterial trigger.

Key Concept

Management of Acute Exacerbation of COPD
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Topics

General Internal Medicine

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