A 55-year-old man with a long-standing history of chronic bronchitis presents to the emerg… — USMLE Step 2 CK

A 55-year-old man with a long-standing history of chronic bronchitis presents to the emergency department reporting a 2-day history of progressively worsening dyspnea. He states that his daily cough has become more frequent and is now producing thick, yellow-green phlegm, which is a change from his baseline clear secretions. Vital signs show a temperature of $37.6^\circ\text{C}$ ( $99.7^\circ\text{F}$ ), heart rate of $112\text{ /min}$ , respiratory rate of $22\text{ /min}$ , and oxygen saturation of $89\%$ on ambient air. Physical examination is notable for diffuse bilateral expiratory wheezing and a prolonged expiratory phase. Cardiac auscultation reveals a regular rhythm with no murmurs or gallops. There is no jugular venous distention, and peripheral edema is absent. Chest radiography demonstrates lung hyperinflation without focal consolidations or pleural effusions.

Which of the following pharmacologic therapies are indicated as part of this patient's immediate acute management? (Select all that apply)

Nebulized ipratropium bromideAnswer
Oral prednisoneAnswer
Oral azithromycinAnswer
D
Intravenous bumetanide
E
Intravenous piperacillin-tazobactam

Answer

The correct indicated therapies are nebulized ipratropium bromide, oral prednisone, and oral azithromycin.

This patient is experiencing an acute exacerbation of chronic obstructive pulmonary disease (AECOPD), defined by an acute change in baseline dyspnea, cough, or sputum production. The standard initial pharmacologic management for AECOPD includes short-acting bronchodilators (e.g., ipratropium or albuterol) to relieve acute bronchospasm and systemic glucocorticoids (e.g., oral prednisone) to decrease airway inflammation and improve recovery time. Furthermore, antibiotics (e.g., azithromycin) are indicated because the patient exhibits all three cardinal symptoms of an exacerbation: increased dyspnea, increased sputum volume, and increased sputum purulence (yellow-green phlegm). Oral administration of steroids and antibiotics is preferred and highly effective in hemodynamically stable patients.

Step-by-Step Solution

Identify the patient's clinical syndrome.

The patient is experiencing an acute exacerbation of COPD (AECOPD), evidenced by worsening dyspnea, increased sputum volume, and increased sputum purulence.

Recognizing the triad of cardinal symptoms guides the indication for specific pharmacological therapies.

Determine the required baseline respiratory interventions.

Short-acting bronchodilators (e.g., ipratropium) and systemic corticosteroids (e.g., prednisone) should be administered.

These medications directly address the acute bronchospasm and underlying airway inflammation that characterize the exacerbation.

Evaluate the specific criteria for antibiotic therapy.

Because all three cardinal symptoms are present, narrow-spectrum targeted antibiotics (such as azithromycin) are indicated.

Bacterial infection is a common trigger for exacerbations presenting with purulent sputum, and antibiotics have been shown to improve outcomes in these specific patients.

Rule out alternative diagnoses and unnecessarily aggressive therapies.

Heart failure therapies and broad-spectrum intravenous antibiotics are ruled out.

The absence of volume overload signs (no JVD, no edema, no crackles) makes loop diuretics inappropriate, and the lack of specific risk factors makes antipseudomonal coverage unnecessary.

Key Concept

The standard initial pharmacologic management for an acute exacerbation of COPD includes short-acting bronchodilators, systemic glucocorticoids, and targeted narrow-spectrum antibiotics if cardinal symptoms (increased dyspnea, sputum volume, and sputum purulence) are present.

Estimated Time:1m 0s

Question

Answer

Step-by-Step Solution

Key Concept

Common Mistakes

Topics

More questions from this topic