<prompt> Spirometry can measure following exceptTidal volumeResidual volumeVital capacityExpiratory Reserve Volume  <response>: Ans. b Residual volume Ref. H-17th1586; H-17th 1587; Ganong ed 28thp. 593Lung volumes that can be measured with spirometer VC, ERV, ICLung volumes that cannot be measured with spirometer RV, FRC, TLC.SPIROMETRY Spirometer is a device capable of measuring expired or inspired gas volume while plotting volume as a function of time. The volume expelled by an active respiratory effort after passive expiration is the expiratory reserve volume, Air left in the lungs after the maximal expiratory effort is the residual volume. VC, expiratory reserve volume ERV, and inspiratory capacity IC are measured by having the patient breathe into and out of a spirometer. Other volumes--specifically, RV. FRC. and TLC--cannot be measured by spirometer as they include the volume of gas present in the lungs even after a maximal expiration. Two techniques are commonly used to measure these volumes: helium dilution and body plethysmography. 