Accuracy Evaluation of Respiratory Air Flow Transducer for Artificial Ventilation

인공호흡시 호흡기류 계측 센서의 정확도 평가

Lee, In-Kwang;Park, Mi-Jung;Kim, Kyoung-Ok;Shin, Eun-Young;Shon, Ho-Sun;Cha, Eun-Jong;Kim, Kyung-Ah

  • Received : 2015.08.23
  • Accepted : 2015.12.25
  • Published : 2015.12.31


Measurement accuracy was evaluated for the respiratory air flow transducer developed for applications under emergent situations. Pressure-Flow calibration equation was obtained by acquisition of air flow signals from the transducer in response to 6 flow waveforms, similar to those of artificial ventilation, generated by the standard flow generator system. Tidal volume and maximal flow rate were calculated on the flow signal then compared with the error-free data obtained by the linear displacement transducer of the flow generator system. Mean relative error of the tidal volume was within 3% and that of the maximal flow rate, approximately 5%, demonstrating accurate enough measurements. Therefore, the transducer could be applied to emergent situations to monitor the respiratory air flow signal as well as diagnostic parameters in real time.


artificial ventilation;respiratory air flow transducer;tidal volume;maximal respiratory air flow rate


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Supported by : National Research Foundation of Korea(NRF)