COPD exacerbation vs Asthma exacerbation
How to tell COPD exacerbation and Asthma exacerbation apart when a board question makes them look alike.
Step 2 CK pairs are in open beta while clinical review finishes. Spot an issue? Tell us.
Post-bronchodilator reversibility of FEV1 at least 12% and 200 mL favors asthma over COPD.
Side by side
Older smoker with chronic sputum and persistent obstruction who acutely worsens, often with hypercapnia, fits COPD exacerbation.
Younger atopic patient with episodic wheeze and marked bronchodilator reversibility fits asthma exacerbation.
Chronic airway inflammation and emphysematous remodeling cause fixed airflow limitation with acute infectious or irritant worsening.
Reversible bronchial hyperresponsiveness and mucosal inflammation cause episodic airflow obstruction.
COPD exacerbation often shows post-bronchodilator FEV1/FVC below 0.70 with limited reversibility, and severe episodes may show pH below 7.35 with PaCO2 above 45 mm Hg.
Asthma exacerbation often shows peak flow under 50% predicted in severe attacks with bronchodilator reversibility of FEV1 at least 12% and at least 200 mL from baseline between episodes.
The trap
Both may wheeze and present hypoxemic, so clinicians sometimes delay COPD-specific steroid and antibiotic decisions or undertreat severe asthma; baseline smoking history and objective reversibility prevent wrong-path management.
The repair move
Next best step: give controlled oxygen targeting saturation 88% to 92%, start inhaled albuterol plus ipratropium, begin prednisone 40 mg daily for 5 days, add antibiotics such as azithromycin 500 mg day 1 then 250 mg daily for 4 days when sputum purulence is present, and initiate noninvasive ventilation for persistent hypercapnic acidosis.
Try a free question
CoreA 69-year-old smoker with chronic COPD develops worsening dyspnea and green sputum. BP 150/84 mm Hg, HR 114/min, temp 38.0 C, RR 28/min, oxygen saturation 85% on room air. ABG shows pH 7.32 and PaCO2 56 mm Hg. What is the next best step in management?
Show answer and explanation
Answer: B. Controlled oxygen, inhaled albuterol-ipratropium, systemic steroid, and antibiotic therapy. Standard initial COPD exacerbation management includes targeted oxygen, bronchodilators, systemic steroids, and antibiotics when purulence is present.
Why the other choices are tempting
- A. Wrong because excessive oxygen can worsen CO2 retention in susceptible COPD patients.
- C. Wrong because NIV should be considered first in many hypercapnic patients unless immediate airway failure is present.
- D. Wrong because inhaled corticosteroid monotherapy is insufficient for acute severe exacerbation.
- E. Wrong because provocation testing has no role during acute respiratory decompensation.
Flashcards
Tap a card to flip it.
Which spirometric change favors asthma rather than COPD in obstructive symptoms?
An increase in FEV1 of at least 12% and at least 200 mL after bronchodilator favors asthma.
What oxygen saturation target is recommended in acute COPD exacerbation to limit CO2 retention risk?
Target oxygen saturation is 88% to 92% in most acute COPD exacerbations.
Quick answers
What is the fastest way to tell COPD exacerbation from Asthma exacerbation?
Post-bronchodilator reversibility of FEV1 at least 12% and 200 mL favors asthma over COPD.
What is the key clue for COPD exacerbation?
Older smoker with chronic sputum and persistent obstruction who acutely worsens, often with hypercapnia, fits COPD exacerbation.
What is the key clue for Asthma exacerbation?
Younger atopic patient with episodic wheeze and marked bronchodilator reversibility fits asthma exacerbation.
What is the common trap with COPD exacerbation vs Asthma exacerbation?
Both may wheeze and present hypoxemic, so clinicians sometimes delay COPD-specific steroid and antibiotic decisions or undertreat severe asthma; baseline smoking history and objective reversibility prevent wrong-path management.