FEV1/ FEVC ratio is decreased in all, except: (A) Bronchiectasis, (B) Emphysema, (C) Chronic bronchitis, (D) Tuberculosis
Answer is D. ParameterObstructive lung diseaseRestrictive lung diseaseTotal lung capacityNormal to increaseDecreaseResidual volumeIncreaseDecreaseVital capacityDecreaseDecreaseFEV1/ FVC (FEV1%)DecreaseNormal to increaseFEF 25-75% (Forced expiratory flow rate)Decrease NormalDiffusion capacityNormal (| in emphysema)decreased(Refer: Harrison's Principles of Internal Medicine, 18thedition, pg no: 2163-2165)