RT Journal Article SR Electronic T1 Evaluating pulmonary impairment: appropriate use of pulmonary function and exercise tests JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 148 OP 152 VO 58 IS 2 A1 Wiedemann, Herbert P. YR 1991 UL http://www.ccjm.org/content/58/2/148.abstract AB Pulmonary impairment in patients with occupational lung diseases can frequently be detected and quantified simply by measuring spirometric values (forced vital capacity, forced expiratory volume in 1 second), or single breath-diffusing capacity. W h e n the results of such pulmonary function tests are equivocal or inconsistent with clinical symptoms, cardiopulmonary exercise testing provides helpful ancillary information. Published guidelines are available to assist in grading the severity of respiratory impairment based on pulmonary function and exercise testing.