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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...

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Autores principales: Domingo, Christian, Canturri, Elisa, Moreno, Amalia, Espuelas, Humildad, Vigil, Laura, Luján, Manel
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Molecular Diversity Preservation International (MDPI) 2010
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.
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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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