This study involves healthy children who need sedation for non-invasive imaging procedures. Sedation means using medication to help children stay calm and still during medical tests. The medication being tested is dexmedetomidine, which will be given through the nose rather than through an injection. This medicine is normally given through a vein, but this study will examine whether giving it through the nose can work well for children who need imaging tests such as scans. The children in this study will be between 6 months and 12 years old and weigh less than 30 kilograms.

The purpose of the study is to find out how well intranasal dexmedetomidine works for sedating children during imaging procedures. The study will look at whether one dose of the medication is enough to provide adequate sedation, or whether some children need a second dose. The researchers will measure how quickly the sedation begins after giving the medication and how long the sedation lasts. They will also track how long the imaging procedure takes, how long children wait before the procedure starts, and how long the total hospital visit lasts.

During the study, the medication will be given through the nose before the imaging procedure begins. The medical team will watch the children carefully to see how well the sedation works and to check for any unwanted effects. The study will also record any side effects that occur. All children participating will receive the active medication, as this study does not include a placebo group. The information gathered will help doctors understand whether this method of giving dexmedetomidine is a good option for sedating children during imaging procedures.