USMLE High-Yield Questions on Instagram: "“the spirometry disagreed” ⸻ 📚 EXPLANATION (WITH ANSWER) Pulmonary function testing shows a decreased FEV₁/FVC ratio. That pattern means airflow obstruction: the patient can’t exhale quickly because the airways are narrowed or inflamed. Smoking (including marijuana) can cause: • Airway inflammation • Bronchospasm • Increased mucus production All of this disproportionately lowers FEV₁ compared with FVC, dropping the ratio. 👉 Correct answer: B) Obstructi

Study Smarter with MedSchoolBro on Instagram: "Code Havic @medschoolbro = Mystery Discount Spirometry: 30-sec Review 🫁 FEV₁ = air exhaled in 1 second 🫀 FVC = total exhaled volume 📊 FEV₁/FVC ratio = the key number 🔥 Obstructive (