Design and realization of a mobile-automatic calibration system for ventilator testers: oxygen concentration

Abstract

Ventilators have a vital role in supplying oxygen to the patients experiencing respiratory failure and ensuring the patient’s oxygen saturation to levels above 50% continuously. Therefore, the accuracy of oxygen concentration measurement becomes very important to assure patient safety obtained by testing the ventilator against a ventilator tester. Testing and calibration laboratory use a ventilator tester for routine calibration of health facilities as well as performance and clinical testing for emergency ventilators that developed massively these days. A mobile-ventilator tester calibration system for oxygen levels, especially for concentrations of 30%, 60%, and 90% according to SNI ISO 80601-2-12:2020, is being developed. This calibration system is designed to operate automatically based on Laboratory virtual instruments engineering workbench (LabVIEW) to control the instrumentation system and perform data acquisition of (oxygen concentration) readings. Three concentrations of oxygen gas reference are stored each on 2 L gas reservoirs to ease the mobilization of the system to testing and calibration laboratory. Hopefully, the traceability to International System of Units (SI) for the ventilator tester can be realized with this calibration system, thus can improve the quality of health services and increase the competitiveness of nationally produced medical devices. Although some improvements are required, the prototype of the calibrator works appropriately as intended.