RT Journal Article
SR Electronic
T1 Investigation of preoxygenation methods in cesarean surgeries with the oxygen reserve index
JF Saudi Medical Journal
JO Saudi Med J
FD Prince Sultan Military Medical City
SP 1317
OP 1323
DO 10.15537/smj.2022.43.12.20220548
VO 43
IS 12
A1 Kocakulak, Duygu
A1 Küçükosman, Gamze
A1 Köksal, Bengü Gülhan
A1 Baytar, Çağdaş
A1 Okyay, Rahşan D.
A1 Bollucuoğlu, Keziban
A1 Öztürk, Tuğçe
A1 Pişkin, Özcan
A1 Ayoğlu, Hilal
YR 2022
UL http://smj.org.sa/content/43/12/1317.abstract
AB 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% O2 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 O2 (FiO2), fraction of expired O2 (FeO2), 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. FiO2 values were found to be low in T1 (p=0.012) in Group 1, and high in FeO2 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<0.001). According to the results of the correlation analyses between the mean ORI values and their mean FeO2 and FiO2 values, there were weak and positive statistically significant relationships at T3 and T4 (p<0.05).Conclusion: As we obtained greater FiO2 and FeO2 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.