Which findings indicate possible COPD or asthma?

• A. Wheezing or a history of COPD/asthma, smoking history, and elevated ETCO2 readings.
• B. No wheeze, normal ETCO2 readings.
• C. Fever and productive cough.
• D. Hypotension and bradycardia.

Answer: (A)

The main idea here is recognizing signs of obstructive airway disease during an acute episode. The most telling clues are wheezing, a history of COPD or asthma, and a smoking history. Wheezing reflects narrowed airways from bronchospasm and inflammation, which is typical in both asthma and COPD. A prior diagnosis of COPD or asthma raises the likelihood that an acute event is a flare-up of one of these conditions. Smoking history is a major risk factor that predisposes to COPD and can worsen asthma, making an exacerbation more likely. End-tidal CO2 elevation suggests that ventilation is inadequate or CO2 is being retained, which can occur when airflow is severely limited in obstructive disease. Taken together, these findings point toward COPD or asthma as the source of the symptoms.

In contrast, no wheeze with normal ETCO2 makes an obstructive flare-up less likely. Fever and productive cough point more toward infection rather than a purely obstructive process, and hypotension with bradycardia indicates a different, circulatory problem rather than asthma or COPD.