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Nonlinear Flow Sensor Calibration with an Accurate Syringe
Flow sensors are required for monitoring patients on mechanical ventilation and in respiratory research. Proper calibration is important for ensuring accuracy and can be done with a precision syringe. This procedure, however, becomes complex for nonlinear flow sensors, which are commonly used. The o...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6068951/ https://www.ncbi.nlm.nih.gov/pubmed/29976851 http://dx.doi.org/10.3390/s18072163 |
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author | Biselli, Paolo Jose Cesare Nóbrega, Raquel Siqueira Soriano, Francisco Garcia |
author_facet | Biselli, Paolo Jose Cesare Nóbrega, Raquel Siqueira Soriano, Francisco Garcia |
author_sort | Biselli, Paolo Jose Cesare |
collection | PubMed |
description | Flow sensors are required for monitoring patients on mechanical ventilation and in respiratory research. Proper calibration is important for ensuring accuracy and can be done with a precision syringe. This procedure, however, becomes complex for nonlinear flow sensors, which are commonly used. The objective of the present work was to develop an algorithm to allow the calibration of nonlinear flow sensors using an accurate syringe. We first noticed that a power law equation could properly fit the pressure-flow relationship of nonlinear flow sensors. We then developed a software code to estimate the parameters for this equation using a 3 L syringe (calibration syringe). Finally, we tested the performance of a calibrated flow sensor using a different 3 L syringe (testing syringe) and a commercially available spirometer. After calibration, the sensor had a bias ranging from −1.7% to 3.0% and precision from 0.012 L to 0.039 L for volumes measured with the 3 L testing syringe. Calibrated sensor performance was at least as good as the commercial sensor. This calibration procedure can be done at the bedside for both clinical and research purposes, therefore improving the accuracy of nonlinear flow sensors. |
format | Online Article Text |
id | pubmed-6068951 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-60689512018-08-07 Nonlinear Flow Sensor Calibration with an Accurate Syringe Biselli, Paolo Jose Cesare Nóbrega, Raquel Siqueira Soriano, Francisco Garcia Sensors (Basel) Article Flow sensors are required for monitoring patients on mechanical ventilation and in respiratory research. Proper calibration is important for ensuring accuracy and can be done with a precision syringe. This procedure, however, becomes complex for nonlinear flow sensors, which are commonly used. The objective of the present work was to develop an algorithm to allow the calibration of nonlinear flow sensors using an accurate syringe. We first noticed that a power law equation could properly fit the pressure-flow relationship of nonlinear flow sensors. We then developed a software code to estimate the parameters for this equation using a 3 L syringe (calibration syringe). Finally, we tested the performance of a calibrated flow sensor using a different 3 L syringe (testing syringe) and a commercially available spirometer. After calibration, the sensor had a bias ranging from −1.7% to 3.0% and precision from 0.012 L to 0.039 L for volumes measured with the 3 L testing syringe. Calibrated sensor performance was at least as good as the commercial sensor. This calibration procedure can be done at the bedside for both clinical and research purposes, therefore improving the accuracy of nonlinear flow sensors. MDPI 2018-07-05 /pmc/articles/PMC6068951/ /pubmed/29976851 http://dx.doi.org/10.3390/s18072163 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Biselli, Paolo Jose Cesare Nóbrega, Raquel Siqueira Soriano, Francisco Garcia Nonlinear Flow Sensor Calibration with an Accurate Syringe |
title | Nonlinear Flow Sensor Calibration with an Accurate Syringe |
title_full | Nonlinear Flow Sensor Calibration with an Accurate Syringe |
title_fullStr | Nonlinear Flow Sensor Calibration with an Accurate Syringe |
title_full_unstemmed | Nonlinear Flow Sensor Calibration with an Accurate Syringe |
title_short | Nonlinear Flow Sensor Calibration with an Accurate Syringe |
title_sort | nonlinear flow sensor calibration with an accurate syringe |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6068951/ https://www.ncbi.nlm.nih.gov/pubmed/29976851 http://dx.doi.org/10.3390/s18072163 |
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