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Copyright (c) 2023 Proceedings on Automation in Medical Engineering
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Mechanical ventilation has become one of the most widely used life-supporting techniques in the world, providing a proper gas exchange even if the patients breathing is impaired. To verify the functions of these ventilators during development, bench tests, such as lung simulators, offer a wide range of test functionalities. Therefore, a simulator has to provide realistic features of the lung, including the ability to reproduce the varying gas concentration (physiological capnogram) at its interfaces. This paper presents the implementation of a gas mixing unit into an open blower-driven lung simulator to reproduce the respiratory CO2 concentration of a patient.