A 53-year-old man comes to the office with a 2-year history of seasonal cough, episodic shortness of breath, and wheezing. Family history is significant for asthma. He has a 34-pack-year smoking history. Physical examination shows bilateral scattered expiratory wheezes. Which of the following would be most helpful in differentiating asthma from chronic obstructive pulmonary disease?
سؤال مجاني 1 من 10 اليوم · اشترك وكمّل بدون حد
اعرض الإجابة
الإجابة والشرح
ادخل لحسابك عشان نحفظ إجاباتك ونوريك أخطاءك.
الإجابة: D. Spirometry before and after bronchodilator
Spirometry before and after a bronchodilator separates the two: asthma shows reversible obstruction (FEV1 rise ≥12% and ≥200 mL), while COPD is only partially reversible or irreversible. CXR, IgE and alpha-1 antitrypsin levels cannot make this distinction.
ليش كل خيار صح أو غلط
-
A
ليش غلط
Chest imaging is not needed for diagnosis of COPD; it is considered only to look for alternative diagnoses or complications.
✓ COPD.pdf · p. 6 -
B
ليش غلط
Serum AAT is tested to screen patients with confirmed COPD for alpha-1 antitrypsin deficiency; it is not the test that separates asthma from COPD.
✓ COPD.pdf · p. 5 -
C
ليش غلط
High total IgE is listed only as an additional study in asthma; the key discriminator is the response to a bronchodilator.
✓ Asthma & asthma exacerbation.pdf · p. 5 -
D
ليش صح
A negative post-bronchodilator response (FEV1 change < 12%) is more common in COPD than asthma, where obstruction is reversible.
✓ COPD.pdf · p. 6
- المصدر
- COPD.pdf · p. 6
Asthma & asthma exacerbation.pdf · p. 12 - المحاضرة
- Asthma · Pulmonology · Module B
- ظهر في
- Respi bank