IRCT20180726040601N1 IRCT 2018-09-24 Tabriz University of Medical Sciences Comparing the time of extubation, postoperative apnea incidence, and the quality of perioperative analgesia in infants scheduled for pyloromyotomy- Intravenous bolus fentanyl vs rectal acetaminophen HPS Comparing the time of extubation, postoperative apnea incidence, and the quality of perioperative analgesia in infants scheduled for pyloromyotomy-intravenous bolus fentanyl vs rectal acetaminophen 2017-02-19 anticipated 20 Complete https://irct.ir/trial/33875 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Not used, Assignment: Parallel, Purpose: Prevention, Randomization description: Using online program: URL:http://WWW.stat.vbc.ca/nrolin/statssize/bz.htmf, Blinding description: In this research patients and health care providers and analyzers were not aware of choosing people . N/A Hypertrophic Pyloric Stenosis. Intervention 1: Control group: Infants with Hypertrophic Pyloric Stenosis witch are candidate for surgery ; in this group we use Fentanyl as a pain relief . in Fentanyl group we will use Fentanyl (1μg/kg) with Midazolam .in both groups the time of discharge from recovery and the number of apneas that happened in recovery will be written . Intervention 2: Intervention group: Infants with Hypertrophic Pyloric Stenosis witch are candidate for surgery ; in this group we use rectal Acetaminophen as a pain relief. in acetaminophen group we will use rectal Acetaminophen ( 40mg/kg) before Midazolam . Yes - There is a plan to make this available What will be shared: All the information will be shared after hidden the names When: It will be reachable after publish. To whom: All the information will be reachable for researchers . Conditions: No condition . Where to obtain: Children hospital of Tabriz. How to obtain: It will be reachable after publish Comments: