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Optimal Clinical Time for Reliable Measurement of Transcutaneous CO(2) with Ear Probes: Counterbalancing Overshoot and the Vasodilatation Effect
OBJECTIVES: To determine the optimal clinical reading time for the transcutaneous measurement of oxygen saturation (SpO(2)) and transcutaneous CO(2) (TcPCO(2)) in awake spontaneously breathing individuals, considering the overshoot phenomenon (transient overestimation of arterial PaCO(2)). EXPERIMEN...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Molecular Diversity Preservation International (MDPI)
2010
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3270853/ https://www.ncbi.nlm.nih.gov/pubmed/22315552 http://dx.doi.org/10.3390/s100100491 |
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author | Domingo, Christian Canturri, Elisa Moreno, Amalia Espuelas, Humildad Vigil, Laura Luján, Manel |
author_facet | Domingo, Christian Canturri, Elisa Moreno, Amalia Espuelas, Humildad Vigil, Laura Luján, Manel |
author_sort | Domingo, Christian |
collection | PubMed |
description | OBJECTIVES: To determine the optimal clinical reading time for the transcutaneous measurement of oxygen saturation (SpO(2)) and transcutaneous CO(2) (TcPCO(2)) in awake spontaneously breathing individuals, considering the overshoot phenomenon (transient overestimation of arterial PaCO(2)). EXPERIMENTAL SECTION: Observational study of 91 (75 men) individuals undergoing forced spirometry, measurement of SpO(2) and TcPCO(2) with the SenTec monitor every two minutes until minute 20 and arterial blood gas (ABG) analysis. Overshoot severity: (a) mild (0.1–1.9 mm Hg); (b) moderate (2–4.9 mm Hg); (c) severe: (>5 mm Hg). The mean difference was calculated for SpO(2) and TcPCO(2) and arterial values of PaCO(2) and SpO(2). The intraclass correlation coefficient (ICC) between monitor readings and blood values was calculated as a measure of agreement. RESULTS: The mean age was 63.1 ± 11.8 years. Spirometric values: FVC: 75.4 ± 6.2%; FEV(1): 72.9 ± 23.9%; FEV(1)/FVC: 70 ± 15.5%. ABG: PaO(2): 82.6 ± 13.2; PaCO(2): 39.9.1 ± 4.8 mmHg; SaO(2): 95.3 ± 4.4%. Overshoot analysis: overshoot was mild in 33 (36.3%) patients, moderate in 20 (22%) and severe in nine (10%); no overshoot was observed in 29 (31%) patients. The lowest mean differences between arterial blood gas and TcPCO(2) was −0.57 mmHg at minute 10, although the highest ICC was obtained at minutes 12 and 14 (>0.8). The overshoot lost its influence after minute 12. For SpO(2), measurements were reliable at minute 2. CONCLUSIONS: The optimal clinical reading measurement recommended for the ear lobe TcPCO(2) measurement ranges between minute 12 and 14. The SpO(2) measurement can be performed at minute 2. |
format | Online Article Text |
id | pubmed-3270853 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2010 |
publisher | Molecular Diversity Preservation International (MDPI) |
record_format | MEDLINE/PubMed |
spelling | pubmed-32708532012-02-07 Optimal Clinical Time for Reliable Measurement of Transcutaneous CO(2) with Ear Probes: Counterbalancing Overshoot and the Vasodilatation Effect Domingo, Christian Canturri, Elisa Moreno, Amalia Espuelas, Humildad Vigil, Laura Luján, Manel Sensors (Basel) Article OBJECTIVES: To determine the optimal clinical reading time for the transcutaneous measurement of oxygen saturation (SpO(2)) and transcutaneous CO(2) (TcPCO(2)) in awake spontaneously breathing individuals, considering the overshoot phenomenon (transient overestimation of arterial PaCO(2)). EXPERIMENTAL SECTION: Observational study of 91 (75 men) individuals undergoing forced spirometry, measurement of SpO(2) and TcPCO(2) with the SenTec monitor every two minutes until minute 20 and arterial blood gas (ABG) analysis. Overshoot severity: (a) mild (0.1–1.9 mm Hg); (b) moderate (2–4.9 mm Hg); (c) severe: (>5 mm Hg). The mean difference was calculated for SpO(2) and TcPCO(2) and arterial values of PaCO(2) and SpO(2). The intraclass correlation coefficient (ICC) between monitor readings and blood values was calculated as a measure of agreement. RESULTS: The mean age was 63.1 ± 11.8 years. Spirometric values: FVC: 75.4 ± 6.2%; FEV(1): 72.9 ± 23.9%; FEV(1)/FVC: 70 ± 15.5%. ABG: PaO(2): 82.6 ± 13.2; PaCO(2): 39.9.1 ± 4.8 mmHg; SaO(2): 95.3 ± 4.4%. Overshoot analysis: overshoot was mild in 33 (36.3%) patients, moderate in 20 (22%) and severe in nine (10%); no overshoot was observed in 29 (31%) patients. The lowest mean differences between arterial blood gas and TcPCO(2) was −0.57 mmHg at minute 10, although the highest ICC was obtained at minutes 12 and 14 (>0.8). The overshoot lost its influence after minute 12. For SpO(2), measurements were reliable at minute 2. CONCLUSIONS: The optimal clinical reading measurement recommended for the ear lobe TcPCO(2) measurement ranges between minute 12 and 14. The SpO(2) measurement can be performed at minute 2. Molecular Diversity Preservation International (MDPI) 2010-01-11 /pmc/articles/PMC3270853/ /pubmed/22315552 http://dx.doi.org/10.3390/s100100491 Text en ©2010 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/) |
spellingShingle | Article Domingo, Christian Canturri, Elisa Moreno, Amalia Espuelas, Humildad Vigil, Laura Luján, Manel Optimal Clinical Time for Reliable Measurement of Transcutaneous CO(2) with Ear Probes: Counterbalancing Overshoot and the Vasodilatation Effect |
title | Optimal Clinical Time for Reliable Measurement of Transcutaneous CO(2) with Ear Probes: Counterbalancing Overshoot and the Vasodilatation Effect |
title_full | Optimal Clinical Time for Reliable Measurement of Transcutaneous CO(2) with Ear Probes: Counterbalancing Overshoot and the Vasodilatation Effect |
title_fullStr | Optimal Clinical Time for Reliable Measurement of Transcutaneous CO(2) with Ear Probes: Counterbalancing Overshoot and the Vasodilatation Effect |
title_full_unstemmed | Optimal Clinical Time for Reliable Measurement of Transcutaneous CO(2) with Ear Probes: Counterbalancing Overshoot and the Vasodilatation Effect |
title_short | Optimal Clinical Time for Reliable Measurement of Transcutaneous CO(2) with Ear Probes: Counterbalancing Overshoot and the Vasodilatation Effect |
title_sort | optimal clinical time for reliable measurement of transcutaneous co(2) with ear probes: counterbalancing overshoot and the vasodilatation effect |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3270853/ https://www.ncbi.nlm.nih.gov/pubmed/22315552 http://dx.doi.org/10.3390/s100100491 |
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