True in Asthma:: (A) Increased FRC Reduced Residual Volume, (B) Increased FRC Increased Residual Vol, (C) Reduced FRC Reduced Residual Volume, (D) Reduced FRC Increased Residual Volume
Answer is B. Ans. B- Increased FRC Increased Residual VolDiseases that REDUCE compliancea. Fibrosisb. Pulmonary hypertension/congestionc. Alveolar atelectasisd. Reduced surfactant (increased surface tension) e.g. artificial ventilation, prematurityDiseases that INCREASE compliance:a. Pulmonary emphysema (alteration in elastic tissue) > static compliance is Increased but dynamic compliance is reduced.b. Normal ageing (alteration in elastic tissue)c. Asthma (reason unknown).