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What is Characteric finding in restrictive lung disease is: and explain in detail?
Ans. c (Normal FEV, /Vc). (Ref. Harrison, Principles of Medicine, 18th/1448)OBSTRUCTIVE PATTERNRESTRICTIVE PATTERN (Al 2005)EXTRAPARENCHYMAL PATTERN (INSPIRATORY DYSFUNCTION)Decreased expiratory flow rates (hallmark)Normal forced expiratory flow ratesExpiratory flow rates not affectedDecreased FEV1/VC (in fully established disease)-FEVl/FVC variableTLC normal or increased (Minor change)Decreased lung violume (TLC and VC)TLC not predictableIncreased residual volume (striking)Decreased residual volumeIncreased RVIncresed ratio of RV/TLC--Decreased VC-Decreased MIP