A AB BS S T TR RA AC CT T O Ob bj je ec ct ti iv ve e: : Sedation is necessary frequently needed in children undergoing magnetic resonance imaging (MRI) to avoid motion. The purpose of present observational cross-sectional study is to investigate the success of three different sedation regimens including ketamine, propofol and sevoflurane in a mixture of 50% nitrous oxide-oxygen which are routinely used in our institution for pediatric sedation during MRI following midazolam premedication. M Ma at te er ri ia al l a an nd d M Me et th ho od ds s: : Three hundred and seventy children (age 0-14 year) were enrolled to the study. Sedation was achieved in 125 children with ketamine, in 130 children with propofol and in 115 children with sevoflurane in a mixture of 50% nitrous oxide-oxygen. Comparison was performed among the groups for number of failures by excessive movements, numbers of rescue, adverse effects, sedation time and recovery time. Descriptive and parametric statistics (ANOVA) were utilized to look for significant differences. R Re es su ul lt ts s: : Children were similar in demographic characteristics. The comparison of three regimes in term of success according to the movements affecting imaging and requirement for rescue drug showed that minimal mobility which affects imaging and requires less rescue drug was achieved with sevoflurane in a mixture of 50% nitrous oxide-oxygen rather than propofol and ketamine. Although during MR imaging patients in Group ketamine required fewer numbers of rescue intervention to resolve the respiratory problems, desaturation by opening the airway by repositioning the head and neck and increasing the oxygen supply than the other two groups, rescue drug requirement was found more than Sevoflurane group. C Co on nc cl lu us si io on n: : In this study three different sedation regimens were compared according to the mobility which affects imaging and rescue for drug requirement and Sevoflurane in a mixture of 50% nitrous oxide-oxygen -based MRI sedation regimen in children is associated with lower movement, lower requirement for rescue drug, less side effects and higher success compared to ketamine and propofol. K Ke ey y W Wo or rd ds s: : Diffusion magnetic resonance imaging; conscious sedation; ketamine; propofol; sevoflurane Ö ÖZ ZE ET T A Am ma aç ç: : Çocuklarda Manyetik Rezonans (MR) çekimi sırasında hareketi önlemek amacıyla sıklıkla sedasyona ihtiyaç vardır. Bu gözlemsel kesitsel çalışmanın amacı, kurumumuzda MR görüntüleme esnasında midazolam premedikasyonunu takiben çocukların sedasyonunda rutin olarak kullandığımız Ketamin, Propofol ve Sevofluran+%50 nitröz oksit-oksijen kombinasyonu içeren üç farklı sedasyon rejiminin başarısını araştırmaktır. G Ge er re eç ç v ve e Y Yö ön nt te em ml le er r: : Çalışmaya 0-14 yaş arası 370 çocuk dahil edildi. Oral midazolam premedikasyonunu takiben, çocukların 125'inde sedasyon iv. Ketamin (K), 130'unda iv. Propofol (P), ve 115'inde Sevofluran (S) + %50 nitröz oksit-oksijen kombinasyonu ile sağlandı. Gruplar arası karşılaştı...