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Zorluk: KolayPulmonary and Critical Care

A 68-year-old male arrives at the emergency department reporting a two-day history of progressively worsening shortness of breath. He also notes a significant increase in his baseline daily cough and reports that his sputum has changed from clear to thick and yellow-green. He has a 45-pack-year smoking history and was diagnosed with chronic obstructive pulmonary disease (COPD) three years ago. Vital signs show a temperature of 37.5°C (99.5°F), blood pressure of 140/90 mmHg, heart rate of 108/min, and respiratory rate of 24/min. Pulse oximetry demonstrates an oxygen saturation of 89% on room air. Physical examination reveals a barrel-shaped chest, use of accessory muscles of respiration, and a prolonged expiratory phase with diffuse bilateral wheezing. Jugular venous pressure is normal, and there is no peripheral edema. An arterial blood gas analysis on room air reveals the following:

ParameterValue
pH7.34
PaCO2\text{PaCO}_256 mmHg
PaO2\text{PaO}_255 mmHg
HCO3−\text{HCO}_3^-29 mEq/L

In addition to supplemental oxygen, which of the following is the most appropriate initial combination of pharmacotherapy for this patient?

  1. A
    Intravenous furosemide and sublingual nitroglycerin
  2. B
    Intravenous piperacillin-tazobactam and intravenous vancomycin
  3. Inhaled albuterol, oral prednisone, and oral azithromycinCevap
  4. D
    Intravenous sodium bicarbonate and inhaled albuterol
  5. E
    Inhaled albuterol, oral prednisone, and intravenous meropenem

Cevap

The correct answer is inhaled albuterol, oral prednisone, and oral azithromycin.
The correct answer includes inhaled albuterol, oral prednisone, and oral azithromycin because this combination directly addresses the pathophysiology of a standard acute COPD exacerbation. Short-acting bronchodilators and systemic corticosteroids relieve bronchospasm and reduce airway inflammation. The addition of a narrow-spectrum antibiotic like azithromycin is indicated when patients present with the cardinal symptoms of an exacerbation, specifically increased sputum purulence along with increased dyspnea and sputum volume.

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1
Identify the primary clinical syndrome based on the patient's history and physical examination.
The patient has an acute exacerbation of COPD, evidenced by his smoking history, baseline COPD, wheezing, and cardinal symptoms of increased dyspnea, sputum volume, and sputum purulence.
Correctly diagnosing the underlying cause of respiratory distress dictates the management pathway and helps rule out alternative diagnoses like heart failure.
2
Analyze the objective laboratory data provided.
The arterial blood gas reveals an acute-on-chronic respiratory acidosis (low pH, elevated PaCO2, and elevated compensatory HCO3-).
This confirms the etiology of his acidemia is respiratory and rules out a primary metabolic acidosis that would require different interventions.
3
Determine the required pharmacologic interventions for this specific presentation.
The patient needs a short-acting bronchodilator (albuterol), a systemic corticosteroid (prednisone), and a targeted antibiotic (azithromycin).
Standard COPD exacerbation management requires bronchodilation and anti-inflammatory therapy. Antibiotics are specifically indicated because he meets the Anthonisen criteria (specifically the presence of purulent sputum). Proper stewardship requires using a narrow-spectrum agent like a macrolide rather than broad-spectrum intravenous antibiotics.

Anahtar Kavram

The initial management of an uncomplicated acute COPD exacerbation includes short-acting bronchodilators, systemic corticosteroids, and a targeted, narrow-spectrum antibiotic if cardinal symptoms (particularly increased sputum purulence) are present.
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Pulmonary and Critical Care

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