Digital Spirometer with an Extra Measurement Accuracy Main Features: The spirometry studies are indispensable for diagnostics and course control of such pathologies as bronchial asthma and chronic obstructive pulmonary disease. Besides, the spirometry can be rather informative during the checkup of patients suffering from other respiratory diseases. All these pathologies are referred to the most wide-spread ones, and their timely diagnostics is of great importance. The digital spirometer Spiro-Spectrum is intended for the diagnostics of the pulmonary ventilation capacity disorders. It gives an opportunity to execute the following tests: quiet breathing/vital capacity forced expiration maximum pulmonary ventilation capability drug tests