The abnormal preoperative pulmonary function test in a patient with severe kyphoscoliosis includes: (A) Normal RV and decreasd TLC, (B) Reduced FEV1/ FVC, (C) Reduced FEV 25-75, (D) Increased FRC
Answer is A. In severe kyphoscoliosis RV is normal TLC decreased FRC decreased/normal FVC decreases