(A)The whole-lung function test is a basic screening test. (B)The split-lung function tests are regional tests to determine the involvement of the diseased lung to be removed. ABG = arterial blood gas; DLco = diffusing capacity for carbon monoxide; DLT = double-lumen tube; FEV1 = forced expiratory volume in 1 second; MVV = maximum voluntary ventilation: RV = right ventricular; TLC = total lung capacity.