Pulmonary function analyzer system. Unit includes whole body plethysmography, spirometer, computer, and gas analyzers. Computer based system for use in cardio-pulmonary areas. The system measures the ventilation, diffusion and distribution of gases in the lungs. It has automatic calibration and valves are pneumatically operated and controlled by the computer. Used to measure the performance of a patient's respiratory system; for out-patient or pre-surgical screening. Systems have specific high pressure air and oxygen and low pressure helium requirements. Refer to manufacturer's literature.