مقايسه چهار روش پره اكسيژناسيون در بيهوشي اطفال

Comparison between four methods of preoxygenation in pediatric anesthesia

Background: Preoxygenation with 100% oxygen before rapid sequence induction in pediatrics is recommended because of low oxygen reserve and high oxygen consumption. The aim of this study was to compare four different preoxygenation techniques in pediatrics: the traditional technique of 1, 2, 3 and 4 minutes tidal volume breathing. Materials and methods: 60 infants were randomly allocated into four groups and preoxygentated in tidal volume in 4 different time (1, 2, 3 and 4 minutes), oxygen saturation measured in room air before and after preoxygenation. Desaturation time to 98%, 95%, 92% and 90% were measured. Results: There was no significant difference between groups in sex, ASA class, mean age, heart rate and 02 saturation before and after preoxygenation (p<0.05). ANOVA test shows significant difference between 4 min and other groups in desaturation time to 98%, 95%, 92% and 90% (p<0.0001). Conclusion: As a result of low respiratory reserve and twice oxygen consumption in pediatrics 4 minutes preoxygenation should be considered in order to maximize time for intubation period.