Segmental localization of pulmonary disease: medical and surgical significance

The medical and surgical significance of segmental localization of pulmonary disease has been reviewed. Its importance in consideration of the pathogenesis, diagnosis and treatment of certain diseases has been outlined. Simplified reference charts of the lung segments and their bronchi have been presented as a practical aid to their localization.On the basis of such localization a revision has been suggested in the old concept of postural drainage. Positions suitable for this purpose have been indicated and a coordinated program of gravitational drainage has been recommended.