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Difficulty: EasyPulmonary and Critical Care

A 6464-year-old man presents to the urgent care clinic due to a 33-day history of worsening shortness of breath. He reports that his baseline chronic cough has increased in frequency, and his sputum has changed from small amounts of clear mucus to copious amounts of thick, yellow-green phlegm. The patient has a history of severe chronic obstructive pulmonary disease (COPD) and uses daily inhaled tiotropium and as-needed albuterol. He smoked a pack of cigarettes daily for 4040 years but quit 22 years ago. His temperature is 37.3∘C37.3^\circ\text{C} (99.1∘F99.1^\circ\text{F}), blood pressure is 132/84 mm Hg132/84\text{ mm Hg}, pulse is 92/min92/\text{min}, and respiratory rate is 20/min20/\text{min}. Pulse oximetry is 94%94\% on room air. He is speaking in full sentences and is in no acute distress. Lung auscultation reveals a prolonged expiratory phase with diffuse bilateral wheezing, but no crackles are heard. Cardiovascular examination shows no jugular venous distension and no lower extremity edema. The physician administers nebulized albuterol and ipratropium and prescribes a 55-day course of oral prednisone. Which of the following is the most appropriate additional step in management?

  1. Prescribe oral azithromycinAnswer
  2. B
    Administer intravenous piperacillin-tazobactam
  3. C
    Administer intravenous vancomycin
  4. D
    Prescribe oral furosemide
  5. E
    Obtain an arterial blood gas to calculate expected respiratory compensation

Answer

Prescribe oral azithromycin
The correct step is to prescribe an oral antibiotic such as azithromycin. This patient is experiencing an acute exacerbation of chronic obstructive pulmonary disease (AECOPD). The standard outpatient management of AECOPD includes optimizing bronchodilator therapy (e.g., short-acting beta-agonists and muscarinic antagonists) and administering a short course of systemic glucocorticoids (e.g., oral prednisone) to reduce airway inflammation. Additionally, antibiotics are indicated when a patient has increased sputum purulence along with either increased dyspnea or increased sputum volume. Since this patient exhibits all three cardinal symptoms, an antibiotic is highly recommended to target common respiratory pathogens (e.g., Haemophilus influenzae, Moraxella catarrhalis, Streptococcus pneumoniae). A macrolide (azithromycin) or an advanced-generation cephalosporin is an appropriate, targeted choice for an uncomplicated outpatient exacerbation.

Step-by-Step Solution

1
Identify the patient's clinical syndrome.
The patient has an acute exacerbation of chronic obstructive pulmonary disease (AECOPD).
He presents with acute worsening of respiratory symptoms (dyspnea, cough, sputum changes) beyond normal day-to-day variations.
2
Assess the severity and cardinal symptoms to determine the need for antibiotics.
The patient has all three cardinal symptoms: increased dyspnea, increased sputum volume, and increased sputum purulence.
Current guidelines recommend antibiotics for AECOPD if the patient has all three cardinal symptoms, or two cardinal symptoms if one of them is increased sputum purulence.
3
Select the appropriate pharmacotherapy for a stable outpatient.
A narrow-spectrum oral antibiotic such as a macrolide (e.g., azithromycin) is the most appropriate choice.
The patient lacks risk factors for Pseudomonas aeruginosa or poor outcomes, so broad-spectrum intravenous antibiotics are not indicated.

Key Concept

Patients presenting with an uncomplicated acute exacerbation of COPD (AECOPD) who exhibit increased sputum purulence along with increased dyspnea and/or sputum volume should be treated with short-acting bronchodilators, systemic glucocorticoids, and a targeted oral antibiotic such as a macrolide.
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Topics

Pulmonary and Critical Care

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