The purpose of this study is to evaluate how sacral erector spinae block changed the postoperative analgesia requirements in pediatric patients undergoing rectal biopsies under general anesthesia.
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Postoperative pain scores
Timeframe: Postoperative 30th minute, 1st hour, 2nd hour, 4th hour, 6th hour, 12th hour and 24th hour
Analgesia requirement
Timeframe: Post operative 24 hours