{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,22]],"date-time":"2025-11-22T17:02:37Z","timestamp":1763830957496,"version":"3.37.3"},"reference-count":18,"publisher":"Wiley","license":[{"start":{"date-parts":[[2018,10,9]],"date-time":"2018-10-09T00:00:00Z","timestamp":1539043200000},"content-version":"unspecified","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Sensors"],"published-print":{"date-parts":[[2018,10,9]]},"abstract":"<jats:p>This work evaluates the use of a new flow meter to assess exhalation rate. A mobile indirect calorimeter (MIC) was designed and used to measure resting metabolic rate (RMR), which relies on the measure of O<jats:sub>2<\/jats:sub> consumption rate (VO<jats:sub>2<\/jats:sub>) and CO<jats:sub>2<\/jats:sub> production rate (VCO<jats:sub>2<\/jats:sub>). The device was produced from a commercially available and well-established indirect calorimeter and implemented with a new flow meter for the purpose of this study. VO<jats:sub>2<\/jats:sub> and VCO<jats:sub>2<\/jats:sub> were assessed by measuring exhalation rates using the new flow meter and O<jats:sub>2<\/jats:sub> and CO<jats:sub>2<\/jats:sub> concentrations in breath using the original colorimetric sensors of the indirect calorimeter. The new flow meter was based on a thermal flow meter (TFM) affixed to an orifice with a diameter of 6.8\u2009mm used as a passage for exhaled breath from 16 subjects. The results were compared with a metabolic cart (Medical Graphics), which was connected in series to the modified device. We found that 69% of the results had more than a 10% difference between the modified MIC device and the reference instrument, suggesting that the sensitivity of the thermal flow meter changed over time, which precluded its use as a flow meter for breath flow rate measurement.<\/jats:p>","DOI":"10.1155\/2018\/9186475","type":"journal-article","created":{"date-parts":[[2018,10,9]],"date-time":"2018-10-09T19:35:16Z","timestamp":1539113716000},"page":"1-8","source":"Crossref","is-referenced-by-count":2,"title":["Evaluation of a Thermal-Based Flow Meter for Assessment of Mobile Resting Metabolic Rate Measures"],"prefix":"10.1155","volume":"2018","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3767-0203","authenticated-orcid":true,"given":"Nai-Yuan","family":"Liu","sequence":"first","affiliation":[{"name":"School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, AZ, 85287, USA"},{"name":"Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona 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