학술논문
Investigation of preoxygenation methods in cesarean surgeries with the oxygen reserve index
Original Article
Original Article
Document Type
Report
Author
Source
Saudi Medical Journal. December 2022, Vol. 43 Issue 12, p1317, 7 p.
Subject
Language
English
ISSN
0379-5284
Abstract
The term preoxygenation refers to the procedure of the alveolar exchange of the mixture of air inside the functional residual capacity (FRC) that contains nitrogen and water vapor with 100% [...]
Objectives: To investigate preoxygenation methods that were carried out for 3 minutes (min) at tidal volume and 30 seconds (s) with the 4 deep vital capacity technique using the Oxygen Reserve Index (ORI) among pregnant women. Methods: This prospective study was carried out between December 2020 and 2021. The patients were randomly divided into 2 groups with the provision of preoxygenation using 100% [O.sub.2] at a rate of 10 L * min-1 for 3 min at normal tidal volume (Group 1) and 30 s with the 4 deep vital capacity technique (Group 2). For the pregnant women who underwent routine anesthesia induction, hemodynamic parameters before preoxygenation, as well as their fraction of inspired [O.sub.2] (Fi[O.sub.2]), fraction of expired [O.sub.2] (Fe[O.sub.2]), and ORI values were recorded after preoxygenation and 0, 3 and 7 minutes after intubation (T1, T2, T3, and T4). Results: The study was completed with 66 patients. Fi[O.sub.2] values were found to be low in T1 (p=0.012) in Group 1, and high in Fe[O.sub.2] values in T1 and T2 (p=0.025 and 0.009) in Group 2, while no significant differences were found at other times (p>0.05). Oxygen Reserve Index values did not show a significant difference in comparisons between groups, but ORI values of Group 1 after intubation were significantly lower than those measured after preoxygenation in in-group comparisons (p Conclusion: As we obtained greater Fi[O.sub.2] and Fe[O.sub.2] values in preoxygenation with the 30 s 4 deep vital capacity method, and because this method did not cause a significant decrease in the post-intubation ORI values, we believe that the usage of this method in cesarean section surgeries may be appropriate. Keywords: Oxygen Reserve Index, preoxygenation, cesarean section [phrase omitted]
Objectives: To investigate preoxygenation methods that were carried out for 3 minutes (min) at tidal volume and 30 seconds (s) with the 4 deep vital capacity technique using the Oxygen Reserve Index (ORI) among pregnant women. Methods: This prospective study was carried out between December 2020 and 2021. The patients were randomly divided into 2 groups with the provision of preoxygenation using 100% [O.sub.2] at a rate of 10 L * min-1 for 3 min at normal tidal volume (Group 1) and 30 s with the 4 deep vital capacity technique (Group 2). For the pregnant women who underwent routine anesthesia induction, hemodynamic parameters before preoxygenation, as well as their fraction of inspired [O.sub.2] (Fi[O.sub.2]), fraction of expired [O.sub.2] (Fe[O.sub.2]), and ORI values were recorded after preoxygenation and 0, 3 and 7 minutes after intubation (T1, T2, T3, and T4). Results: The study was completed with 66 patients. Fi[O.sub.2] values were found to be low in T1 (p=0.012) in Group 1, and high in Fe[O.sub.2] values in T1 and T2 (p=0.025 and 0.009) in Group 2, while no significant differences were found at other times (p>0.05). Oxygen Reserve Index values did not show a significant difference in comparisons between groups, but ORI values of Group 1 after intubation were significantly lower than those measured after preoxygenation in in-group comparisons (p Conclusion: As we obtained greater Fi[O.sub.2] and Fe[O.sub.2] values in preoxygenation with the 30 s 4 deep vital capacity method, and because this method did not cause a significant decrease in the post-intubation ORI values, we believe that the usage of this method in cesarean section surgeries may be appropriate. Keywords: Oxygen Reserve Index, preoxygenation, cesarean section [phrase omitted]