How to search?
advanced search

Search results

Filters

  • Journals
  • Authors
  • Keywords
  • Date
  • Type

Search results

Number of results: 2
items per page: 25 50 75
Sort by:

Improving the accuracy of the NDIR-based CO 2 sensor for breath analysis

Artur Prokopiuk Zbigniew Bielecki Jacek Wojtas
Metrology and Measurement Systems | 2021 | vol. 28 | No 4 | 803-812 | DOI: 10.24425/mms.2021.138578
Keywords NDIR CO2 sensors breath analysis absorption spectroscopy
Download PDF Download RIS Download Bibtex

Abstract

The paper presents an analysis and practical study of the temperature and pressure influence on a nondispersive infrared (NDIR) sensor for measuring the concentration of carbon dioxide in human breath. This sensor is used for monitoring patients’ carbon dioxide (CO2) in the exhaled air. High precision and accuracy of CO2 concentration measurements are essential in air sampling systems for breath analysers. They, however, require an analysis of the influence of the human exhaled air pressure and temperature on the NDIR CO2 sensor. Therefore, analyses of the changes in concentration were carried out at a pressure from 986 mbar to 1027 mbar and a temperature from 20°C to 36°C. Finally, corresponding correction coefficients were determined which allow to reduce the relative uncertainty of CO2 sensor measurements results from 19% to below 5%.
Go to article

Bibliography

[1] Chludzinski, T.,&Kwiatkowski, A. (2020). Exhaled breath analysis by resistive gas sensors. Metrology and Measurement Systems, 27(1), 81–89. http://dx.doi.org/10.24425/mms.2020.131718
[2] Bielecki, Z., Stacewicz, T., Wojtas, J., Mikołajczyk, J., Szabra, D., & Prokopiuk, A. (2018). Selected optoelectronic sensors in medical applications. Opto-Electronics Review, 26(2), 122–133. https://doi.org/10.1016/j.opelre.2018.02.007
[3] Buszewski, B., Kęsy, M., Ligor, T., & Amann, A. (2007). Human exhaled air analytics: biomarkers of diseases. Biomedical Chromatography, 21(6), 553–566. https://doi.org/10.1002/bmc.835
[4] Schubert, J. K., Spittler, K. H., Braun, G., Geiger, K.,& Guttmann, J. (2001). CO2-controlled sampling of alveolar gas in mechanically ventilated patients. Journal of Applied Physiology, 90(2), 486–492. https://doi.org/10.1152/jappl.2001.90.2.486
[5] Levitzky, M. G. (2013). Pulmonary Physiology (8th ed.): McGraw-Hill Education.
[6] Singh, O. P., & Malarvili, M. B. (2018). Review of infrared carbon-dioxide sensors and capnogram features for developing asthma-monitoring device. Journal of Clinical and Diagnostic Research, 12(10). https://doi.org/10.7860/JCDR/2018/35870.12099
[7] Singh, O. P., Howe, T. A., & Malarvili, M. B. (2018). Real-time human respiration carbon dioxide measurement device for cardiorespiratory assessment. Journal of Breath Research, 12(2), 026003. https://doi.org/10.1088/1752-7163/aa8dbd
[8] Chen, H.-Y., & Chen, C. (2019). Development of a Breath Analyzer for O2 and CO2 Measurement. The Open Biomedical Engineering Journal, 13(1), 21–32. https://doi.org/10.2174/1874120701913010021
[9] Mikołajczyk, J., Bielecki, Z., Stacewicz, T., Smulko, J.,Wojtas, J., Szabra, D., Lentka, Ł., Prokopiuk, A., & Magryta, P. (2016). Detection of gaseous compounds with different techniques. Metrology and Measurement Systems, 23(2). https://doi.org/10.1515/mms-2016-0026
[10] Prokopiuk, A. (2017). Optoelectronics sensors of hydrocarbons based on NDIR technique. Proceedings of SPIE – The International Society for Optical Engineering, 10455. https://doi.org/10.1117/12.2282779
[11] Hamamatsu. (2021, September 2). Mid infrared LED L13201-0430M. http://www.hamamatsu.com.cn/UserFiles/upload/file/20190527/l13201_series_kled1069e.pdf
[12] Pike Technologies. (2021). Stainless Steel Short-Path Gas Cells. https://www.piketech.com/product/stainless-steel-short-path-gas-cells/
[13] Elliot Scientific. (2021, September 2). BPF 4260-120 Iridian mid-IR Filter. https://elliotscientific.com/Iridian-BPF-4260-120
[14] Vigo. (2021, September 2). PV-3TE-5. https://vigo.com.pl/produkty/pv-3te/
[15] Richards, P. L. (1994). Bolometers for infrared and millimeter waves. Journal of Applied Physics, 76(1), 1–24. https://doi.org/10.1063/1.357128
[16] American Thoracic Society. (2005). ATS / ERS Recommendations for Standardized Procedures for the Online and Offline Measurement of Exhaled Lower Respiratory Nitric Oxide and Nasal Nitric Oxide, 2005. American Journal of Respiratory and Critical Care Medicine, 171(8), 912–930. https://doi.org/10.1164/rccm.200406-710ST
[17] Mansour, E., Vishinkin, R., Rihet, S., Saliba,W., Fish, F., Sarfati, P., & Haick, H. (2020). Measurement of temperature and relative humidity in exhaled breath. Sensors and Actuators B: Chemical, 304, 127371. https://doi.org/10.1016/j.snb.2019.127371
[18] UTECH Co., Ltd. (2021, September 2). UT100C Handheld Capnograph Vital Signs Monitor. https://www.chinautech.com/ut100c-capnograph-monitor-and-pulse-oximeter-etco2-spo2-pulse-rate-. html
[19] Memmert. (2021, September 2). Universal oven UF30. https://www.memmert.com/products/heatingdrying-ovens/universal-oven/UF30/
Go to article

Authors and Affiliations

Artur Prokopiuk
1
Zbigniew Bielecki
1
ORCID: ORCID
Jacek Wojtas
1
ORCID: ORCID
  1. Military University of Technology, Institute of Optoelectronics, 00-908 Warsaw, 2 Gen. Sylwestra Kaliskiego St.

Exhaled breath analysis by resistive gas sensors

Tomasz Chludziński Andrzej Kwiatkowski
Metrology and Measurement Systems | 2020 | vol. 27 | No 1 | 81-89 | DOI: 10.24425/mms.2020.131718
Keywords resistive gas sensors data processing exhaled breath analysis
Download PDF Download RIS Download Bibtex

Abstract

Breath analysis has attracted human beings for centuries. It was one of the simplest methods to detect various diseases by using human smell sense only. Advances in technology enable to use more reliable and standardized methods, based on different gas sensing systems. Breath analysis requires the detection of volatile organic compounds (VOCs) of the concentrations below individual ppm (parts per million). Therefore, advanced detection methods have been proposed. Some of these methods use expensive and bulky equipment (e.g. optical sensors, mass spectrometry –MS), and require time-consuming analysis. Less accurate, but much cheaper, are resistive gas sensors. These sensors use porous materials and adsorptiondesorption processes, determining their physical parameters.We consider the problems of applying resistive gas sensors to breath analysis. Recent advances were underlined, showing that these economical gas sensors can be efficiently employed to analyse breath samples. General problems of applying resistive gas sensors are considered and illustrated with examples, predominantly related to commercial sensors and their long-term performance. A setup for collection of breath samples is considered and presented to point out the crucial parts and problematic issues.

Go to article

Authors and Affiliations

Tomasz Chludziński
Andrzej Kwiatkowski

This page uses 'cookies'. Learn more