The Elite Platinum DX Body plethysmograph with the analysis of diffusion and lung volumes with washout method provides a complete set of diagnostic tests, including the resistance of the airways and total lung capacity, which enables precise examination of the patient. The system is equipped with an automatic control of the reliability and accuracy of the spirometric tests according to ERS/ATS recommendations. Construction of the equipment also allows to perform full spirometry, evaluation of diffusion and TGV (thoracic gas volume) in patients in a wheelchair (without leaving the wheelchair) and in children. The device enables the evaluation of TLC (total lung capacity), DLCO (diffusing capacity of the lungs for carbon monoxide), Raw (airway resistance), flow curves, curves of respiratory flow and maximum inspiratory and expiratory pressures, as well as provocation tests.