Inhalation Induction Using Sevoflurane in Children, The Single Breath Vital Capacity Technique Compared to Tidal Volume Technique

ABSTRACT

Introduction: The low solubility as well as the absence ofpungency facilitates rapid induction by facemask, makingsevoflurane the anesthetic of first choice for inhalationalinduction in children. The aim of our study was to comparethe efficacy and tolerance and to compare the inductioncharacteristics of sevoflurane by vital capacity and tidalvolume techniques.Material and methods: Our study included 30 patients eachin both group’s i.e. single breath vital (VC) capacity and tidalvolume groups (TV). The mean age in VC group was 8.76years and in TV group was 8.86 years. We mainly comparedthe Induction time, hemodynamic changes and adverse eventsin both the techniques using sevoflurane.Results: The heart rate, systolic blood pressure, diastolicblood pressure and the mean arterial pressure were comparedbetween both the groups. All these parameters were takenbefore induction, after loss of eyelash reflex and up to 10minutes at 2 minute intervals. There were minimal changesbetween the two groups but clinically, they are not statisticallysignificant in view of mean blood pressure whereas weobserved statistically significant difference in heart rate at8minutes in the post induction period which resolved later. Inour study, we observed an increased incidence of cough andinvoluntary movements in T V. group compared to V C groupbut statistically, there is no significant difference.Conclusion: Sevoflurane Induction improved the speedof induction when compared to tidal volume technique andreduced the incidence of induction complications