“…This study found that local anesthesia can be successfully used for TTI in older children, particularly those aged 5 years and older, while face-mask inhalation or intravenous anesthesia was more commonly used in preschool-aged children. In clinical practice, however, it is currently standard to perform TTI under intravenous anesthesia using ketamine, facemask inhalation anesthesia, or both [ 4 ], despite potentially dangerous side effects. For example, children requiring TTI often have an upper respiratory tract infection, which increases the risk of laryngospasm with inhalational anesthesia [ 2 , 5 ].…”