{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,14]],"date-time":"2026-03-14T18:22:12Z","timestamp":1773512532544,"version":"3.50.1"},"reference-count":25,"publisher":"Hindawi Limited","license":[{"start":{"date-parts":[[2015,1,1]],"date-time":"2015-01-01T00:00:00Z","timestamp":1420070400000},"content-version":"unspecified","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Sensors"],"published-print":{"date-parts":[[2015]]},"abstract":"<jats:p>Accurate measurement of gas exchanges is essential in mechanical ventilation and in respiratory monitoring. Among the large number of commercial flowmeters, only few kinds of sensors are used in these fields. Among them, variable orifice meters (VOMs) show some valuable characteristics, such as linearity, good dynamic response, and low cost. This paper presents the characterization of a commercial VOM intended for application in respiratory monitoring. Firstly, two nominally identical VOMs were calibrated within \u00b110\u2009L\u00b7min<jats:sup>\u22121<\/jats:sup>, to assess their metrological properties. Furthermore, experiments were performed by humidifying the air, to evaluate the influence of vapor condensation on sensor\u2019s performances. The condensation influence was investigated during two long lasting trials (i.e., 4 hours) by delivering 4\u2009L\u00b7min<jats:sup>\u22121<\/jats:sup>and 8\u2009L\u00b7min<jats:sup>\u22121<\/jats:sup>. Data show that the two VOMs\u2019 responses are linear and their response is comparable (sensitivity difference of 1.4%, RMSE of 1.50\u2009Pa); their discrimination threshold is &lt;0.5\u2009L\u00b7min<jats:sup>\u22121<\/jats:sup>, and the settling time is about 66\u2009ms. The condensation within the VOM causes a negligible change in sensor sensitivity and a very slight deterioration of precision. The good static and dynamic properties and the low influence of condensation on sensor\u2019s response make this VOM suitable for applications in respiratory function monitoring.<\/jats:p>","DOI":"10.1155\/2015\/752540","type":"journal-article","created":{"date-parts":[[2015,7,30]],"date-time":"2015-07-30T21:31:48Z","timestamp":1438291908000},"page":"1-7","source":"Crossref","is-referenced-by-count":44,"title":["Experimental Assessment of a Variable Orifice Flowmeter for Respiratory Monitoring"],"prefix":"10.1155","volume":"2015","author":[{"given":"Giuseppe","family":"Tardi","sequence":"first","affiliation":[{"name":"Universit\u00e0 Campus Bio-Medico di Roma, Via Alvaro del Portillo 21, 00128 Rome, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Carlo","family":"Massaroni","sequence":"additional","affiliation":[{"name":"Universit\u00e0 Campus Bio-Medico di Roma, Via Alvaro del Portillo 21, 00128 Rome, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Paola","family":"Saccomandi","sequence":"additional","affiliation":[{"name":"Universit\u00e0 Campus Bio-Medico di Roma, Via Alvaro del Portillo 21, 00128 Rome, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Emiliano","family":"Schena","sequence":"additional","affiliation":[{"name":"Universit\u00e0 Campus Bio-Medico di Roma, Via Alvaro del Portillo 21, 00128 Rome, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"98","reference":[{"key":"1","volume-title":"Measurement of flow and volume","year":"1996"},{"key":"2","doi-asserted-by":"publisher","DOI":"10.1097\/00003246-199006000-00013"},{"key":"3","doi-asserted-by":"publisher","DOI":"10.1007\/s10439-012-0534-3"},{"issue":"7","key":"4","first-page":"285","volume":"22","year":"2008","journal-title":"Journal of Clinical Monitoring and Computing"},{"key":"5","doi-asserted-by":"publisher","DOI":"10.1016\/j.mpaic.2011.12.013"},{"key":"6","volume-title":"Introduction to the differential producer","year":"1996"},{"key":"7","doi-asserted-by":"publisher","DOI":"10.1016\/j.medengphy.2015.01.010"},{"key":"8","doi-asserted-by":"publisher","DOI":"10.1016\/j.expthermflusci.2009.09.008"},{"key":"9","doi-asserted-by":"publisher","DOI":"10.1016\/S0955-5986(01)00018-8"},{"key":"13","first-page":"397","volume-title":"Technical perspectives: gas flow measurement","year":"2011"},{"key":"14","doi-asserted-by":"publisher","DOI":"10.1007\/BF01730956"},{"key":"15","first-page":"113","volume":"2","year":"1950","journal-title":"Methods in Medical Research"},{"key":"16","doi-asserted-by":"publisher","DOI":"10.1016\/j.measurement.2012.05.009"},{"key":"19","doi-asserted-by":"publisher","DOI":"10.1016\/j.flowmeasinst.2013.09.001"},{"key":"20","doi-asserted-by":"publisher","DOI":"10.1109\/JSEN.2014.2336094"},{"key":"21","doi-asserted-by":"publisher","DOI":"10.1097\/00003246-200202000-00015"},{"key":"22","doi-asserted-by":"publisher","DOI":"10.1088\/0967-3334\/33\/7\/1199"},{"key":"23","doi-asserted-by":"publisher","DOI":"10.1183\/09031936.94.07010198"},{"issue":"10","key":"24","doi-asserted-by":"crossref","first-page":"1555","DOI":"10.4187\/respcare.01387","volume":"56","year":"2011","journal-title":"Respiratory Care"},{"key":"25","doi-asserted-by":"publisher","DOI":"10.1002\/ppul.20367"},{"key":"26","doi-asserted-by":"publisher","DOI":"10.1002\/ppul.20674"},{"key":"27","doi-asserted-by":"publisher","DOI":"10.1097\/01.pcc.0000059334.04333.1b"},{"issue":"1","key":"28","first-page":"33","volume":"2","year":"2013","journal-title":"Journal of Pediatric Intensive Care"},{"key":"29","year":"1996"},{"key":"30","doi-asserted-by":"publisher","DOI":"10.1016\/j.tibtech.2015.02.002"}],"container-title":["Journal of Sensors"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/downloads.hindawi.com\/journals\/js\/2015\/752540.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"http:\/\/downloads.hindawi.com\/journals\/js\/2015\/752540.xml","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"http:\/\/downloads.hindawi.com\/journals\/js\/2015\/752540.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2017,6,23]],"date-time":"2017-06-23T16:44:39Z","timestamp":1498236279000},"score":1,"resource":{"primary":{"URL":"http:\/\/www.hindawi.com\/journals\/js\/2015\/752540\/"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2015]]},"references-count":25,"alternative-id":["752540","752540"],"URL":"https:\/\/doi.org\/10.1155\/2015\/752540","relation":{},"ISSN":["1687-725X","1687-7268"],"issn-type":[{"value":"1687-725X","type":"print"},{"value":"1687-7268","type":"electronic"}],"subject":[],"published":{"date-parts":[[2015]]}}}