Background
Adult studies suggest conscious sedation increases gastroesophageal reflux (GER), but the role of anesthesia on GER in children is unclear. Our aim was to study the anesthesia effects on GER and pH study interpretation in children.
Methods
Children undergoing BRAVO wireless pH capsule placement under anesthesia and study duration >36 hours were included. We evaluated the pH parameters (number of reflux episodes >5 minutes, duration of longest reflux episode, time pH <4 and fraction time pH <4) at 1, 2, 6-hour and total study duration blocks using 2 cut-off values (5.3% and 6%) for the worst day, average of both days and 1st day alone. We compared time blocks to evaluate the effect of anesthesia on GER and the proportions of studies changing interpretation after excluding the 1st hour and 1st 2-hour blocks to evaluate anesthesia effect on study interpretation.
Results
A total of 150 children were included. We found a significant increase on the pH parameters in the 1st hour compared to subsequent block times suggesting an effect of anesthesia on GER. We found no significant change in the proportion of studies interpreted as normal vs. abnormal, however, excluding the initial 2 hours of the study would change the study interpretation from abnormal to normal in up to 5% of patients.
Conclusions
We found an effect of anesthesia increasing the GER parameters mainly in the 1st hour and up to the first 6 hours of the study that may result in a change in the study interpretation.
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