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Effects of N(2)O elimination on the elimination of second gases in a two‐step mathematical model of heterogeneous gas exchange
We have investigated the elimination of inert gases in the lung during the elimination of nitrous oxide (N(2)O) using a two‐step mathematical model that allows the contribution from net gas volume expansion, which occurs in Step 2, to be separated from other factors. When a second inert gas is used...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10624564/ https://www.ncbi.nlm.nih.gov/pubmed/37923389 http://dx.doi.org/10.14814/phy2.15822 |
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author | Korman, Ben Dash, Ranjan K. Peyton, Philip J. |
author_facet | Korman, Ben Dash, Ranjan K. Peyton, Philip J. |
author_sort | Korman, Ben |
collection | PubMed |
description | We have investigated the elimination of inert gases in the lung during the elimination of nitrous oxide (N(2)O) using a two‐step mathematical model that allows the contribution from net gas volume expansion, which occurs in Step 2, to be separated from other factors. When a second inert gas is used in addition to N(2)O, the effect on that gas appears as an extra volume of the gas eliminated in association with the dilution produced by N(2)O washout in Step 2. We first considered the effect of elimination in a single gas‐exchanging unit under steady‐state conditions and then extended our analysis to a lung having a log‐normal distribution of ventilation and perfusion. A further increase in inert gas elimination was demonstrated with gases of low solubility in the presence of the increased ventilation‐perfusion mismatch that is known to occur during anesthesia. These effects are transient because N(2)O elimination depletes the input of that gas from mixed venous blood to the lung, thereby rapidly reducing the magnitude of the diluting action. |
format | Online Article Text |
id | pubmed-10624564 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-106245642023-11-05 Effects of N(2)O elimination on the elimination of second gases in a two‐step mathematical model of heterogeneous gas exchange Korman, Ben Dash, Ranjan K. Peyton, Philip J. Physiol Rep Original Articles We have investigated the elimination of inert gases in the lung during the elimination of nitrous oxide (N(2)O) using a two‐step mathematical model that allows the contribution from net gas volume expansion, which occurs in Step 2, to be separated from other factors. When a second inert gas is used in addition to N(2)O, the effect on that gas appears as an extra volume of the gas eliminated in association with the dilution produced by N(2)O washout in Step 2. We first considered the effect of elimination in a single gas‐exchanging unit under steady‐state conditions and then extended our analysis to a lung having a log‐normal distribution of ventilation and perfusion. A further increase in inert gas elimination was demonstrated with gases of low solubility in the presence of the increased ventilation‐perfusion mismatch that is known to occur during anesthesia. These effects are transient because N(2)O elimination depletes the input of that gas from mixed venous blood to the lung, thereby rapidly reducing the magnitude of the diluting action. John Wiley and Sons Inc. 2023-11-03 /pmc/articles/PMC10624564/ /pubmed/37923389 http://dx.doi.org/10.14814/phy2.15822 Text en © 2023 The Authors. Physiological Reports published by Wiley Periodicals LLC on behalf of The Physiological Society and the American Physiological Society. https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Articles Korman, Ben Dash, Ranjan K. Peyton, Philip J. Effects of N(2)O elimination on the elimination of second gases in a two‐step mathematical model of heterogeneous gas exchange |
title | Effects of N(2)O elimination on the elimination of second gases in a two‐step mathematical model of heterogeneous gas exchange |
title_full | Effects of N(2)O elimination on the elimination of second gases in a two‐step mathematical model of heterogeneous gas exchange |
title_fullStr | Effects of N(2)O elimination on the elimination of second gases in a two‐step mathematical model of heterogeneous gas exchange |
title_full_unstemmed | Effects of N(2)O elimination on the elimination of second gases in a two‐step mathematical model of heterogeneous gas exchange |
title_short | Effects of N(2)O elimination on the elimination of second gases in a two‐step mathematical model of heterogeneous gas exchange |
title_sort | effects of n(2)o elimination on the elimination of second gases in a two‐step mathematical model of heterogeneous gas exchange |
topic | Original Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10624564/ https://www.ncbi.nlm.nih.gov/pubmed/37923389 http://dx.doi.org/10.14814/phy2.15822 |
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