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Difficulty: EasyPulmonary and Critical Care

An established patient at a primary care clinic presents with worsening breathlessness over the past four days. The patient has a longstanding history of tobacco use and severe chronic obstructive pulmonary disease. Over the last week, the patient noticed a significant increase in daily sputum production, which has recently changed in appearance from clear to thick and dark green. Vital signs include a blood pressure of 135/85135/85 mmHg, a heart rate of 9898/min, a respiratory rate of 2222/min, and an oxygen saturation of 92%92\% on room air. Physical examination demonstrates a barrel-shaped chest, distant heart sounds, and diffuse expiratory wheezing without any crackles. Jugular venous pressure is normal, and there is no dependent peripheral edema. In addition to optimizing short-acting bronchodilator therapy and administering systemic corticosteroids, which of the following is the most appropriate next step in management?

  1. Prescription of a short course of an oral macrolide antibioticAnswer
  2. B
    Initiation of daily oral furosemide
  3. C
    Immediate referral to the emergency department for intravenous broad-spectrum antibiotics
  4. D
    Urgent transthoracic echocardiogram to assess ejection fraction
  5. E
    Arterial blood gas analysis to calculate Winter's formula for acid-base compensation

Answer

Prescription of a short course of an oral macrolide antibiotic
This patient is presenting with a classic acute exacerbation of chronic obstructive pulmonary disease (COPD). The standard of care for an acute COPD exacerbation includes optimizing bronchodilators, administering a short course of systemic corticosteroids, and providing supplemental oxygen if needed. In addition, antibiotic therapy is highly indicated. The decision to use antibiotics relies on the presence of cardinal symptoms: increased dyspnea, increased sputum volume, and increased sputum purulence. Because this patient exhibits all three, a short course of an oral antibiotic (such as a macrolide, advanced generation cephalosporin, or respiratory fluoroquinolone) is the most appropriate next step in management.

Step-by-Step Solution

1
Evaluate the patient's presenting symptoms against baseline COPD status.
The patient has increased breathlessness, increased sputum volume, and increased sputum purulence (changed to dark green).
Identifying changes from baseline is necessary to diagnose an acute exacerbation of COPD.
2
Assess for signs of alternative diagnoses, specifically acute decompensated heart failure.
The physical exam shows no crackles, normal jugular venous pressure, and no peripheral edema.
Heart failure and COPD exacerbations can present similarly with dyspnea, but the absence of volume overload points to a primary respiratory etiology.
3
Determine the indication for antibiotic therapy based on Anthonisen criteria.
The patient exhibits all three cardinal symptoms (dyspnea, sputum volume, sputum purulence).
Empiric antibiotics are indicated for COPD exacerbations when patients have all three cardinal symptoms or two symptoms if one is increased purulence.

Key Concept

Patients experiencing an acute exacerbation of chronic obstructive pulmonary disease (COPD) should be prescribed a short course of empiric antibiotics (e.g., macrolide, cephalosporin, or fluoroquinolone) if they present with increased sputum purulence along with either increased dyspnea or increased sputum volume.
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Topics

Pulmonary and Critical Care

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