Question: how may frc be reduced?
Answer: increased elastic inward recoil of the lung, e.g. basal atelectasis, fibrosing alveolitis. loss of elastic outward recoil of chest, e.g. kyphoscoliosis, obesity. or both. Reduced FRC can be the result of widespread volume loss, e.g. following abdominal surgery, or more localized loss, e.g lobar collapse.