Research and development of a system for monitoring the operating status ofhigh-flow oxygen apparatus using temperature and humidity sensors

Yamamoto Yuto, Watanabe Takuro, Takeuchi Michihiro

doi:10.4286/jjmi.91.259

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Other Title

温湿度センサを用いた高流量酸素投与器具の動作状態を監視するシステムの開発研究
オンシツドセンサオモチイタコウリュウリョウサンソトウヨキグノドウサジョウタイオカンシスルシステムノカイハツケンキュウ

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Abstract

<p>In oxygen therapy, high-flow oxygenation devices are employed for patients with respiratory failure. Heating and humidification are essential for high-flow oxygenation. In this study, we develop a system that can quantitatively and objectively monitor heating and humidification status in high-flow oxygenation devices. The system consists of a temperature and humidity sensor, a microcontroller, a piezoelectric speaker, and LEDs. It is independent of the high-flow oxygen apparatus and is powered by a battery to monitor the status without being affected by other equipment. We measured the temperature and humidity values of the gas supplied from the high-flow oxygenation device to the oxygen mask over time. The temperature and humidity values confirmed the presence of sterile water and the operation of a heater. The humidity and temperature values decreased in the absence of sterile water and heater, respectively. In addition, by setting a threshold for the temperature and humidity values, we could quantitatively and objectively grasp abnormal conditions. Under an abnormal condition, the LEDs emit light and an alarm is issued; this enables visual and auditory confirmation of the situation and prompts response to the abnormal condition.</p>

Journal

Iryou kikigaku (The Japanese journal of medical instrumentation)

Iryou kikigaku (The Japanese journal of medical instrumentation) 91 (3), 259-267, 2021

Japanese Society of Medical Instrumentation

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