Open Access

Measurement of exhaled breath temperature in patients under general anesthesia: A feasibility study

  • Authors:
    • Libo Guo
    • Jinghui Shi
    • Desheng Liu
    • Yue Wang
    • Hongshuang Tong
    • Yue Feng
    • Pulin Yu
    • Yanji Lv
    • Enyou Li
    • Changsong Wang
  • View Affiliations

  • Published online on: January 20, 2023     https://doi.org/10.3892/br.2023.1600
  • Article Number: 18
  • Copyright: © Guo et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

The aim of the present study was to investigate the respiratory parameters that influence the exhaled breath temperature (EBT) and the feasibility of using the latter to monitor the core temperature under general endotracheal anesthesia. A total of 20 patients undergoing abdominal surgery were included in the present study. At the first stage of the experiment, the respiratory rate was adjusted, while the other respiratory parameters [tidal volume, inspiratory and expiratory time ratio (TI:TE), and positive end expiratory pressure (PEEP)] were maintained at a constant level. At the second stage, the tidal volume was adjusted, while the other respiratory parameters were maintained at a constant level. At the third stage, the TI:TE was adjusted, while the other parameters were maintained at a constant level. At the fourth stage, PEEP was adjusted, while the other parameters were maintained at a constant level. In each experiment, the EBT, the maximum temperature of exhaled air in each min, the inhaled air temperature and the nasopharyngeal temperature (T nose) were recorded every min. During the first stage of the experiment, no significant difference was noted in the EBT at different levels of respiratory rate. During the second, third and fourth stage, no significant difference was noted in the EBT at different tidal volumes, TI:TE and PEEP, respectively. The EBT was significantly correlated with the T nose. Overall, the present study demonstrated that the EBT of patients undergoing abdominal surgery under general endotracheal anesthesia was not affected by the examined respiratory parameters and that it could be considered a feasible method of monitoring core temperature.

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March-2023
Volume 18 Issue 3

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Spandidos Publications style
Guo L, Shi J, Liu D, Wang Y, Tong H, Feng Y, Yu P, Lv Y, Li E, Wang C, Wang C, et al: Measurement of exhaled breath temperature in patients under general anesthesia: A feasibility study. Biomed Rep 18: 18, 2023
APA
Guo, L., Shi, J., Liu, D., Wang, Y., Tong, H., Feng, Y. ... Wang, C. (2023). Measurement of exhaled breath temperature in patients under general anesthesia: A feasibility study. Biomedical Reports, 18, 18. https://doi.org/10.3892/br.2023.1600
MLA
Guo, L., Shi, J., Liu, D., Wang, Y., Tong, H., Feng, Y., Yu, P., Lv, Y., Li, E., Wang, C."Measurement of exhaled breath temperature in patients under general anesthesia: A feasibility study". Biomedical Reports 18.3 (2023): 18.
Chicago
Guo, L., Shi, J., Liu, D., Wang, Y., Tong, H., Feng, Y., Yu, P., Lv, Y., Li, E., Wang, C."Measurement of exhaled breath temperature in patients under general anesthesia: A feasibility study". Biomedical Reports 18, no. 3 (2023): 18. https://doi.org/10.3892/br.2023.1600