Objective: To investigate the use of ketamine combined with dexmedetomidine for sedation in children with autism spectrum disorder, Methods:aged 2-6 years,, ASA grade I or II. The children were randomly divided into three groups using a random number table method: a low-dose dexmedetomidine group (DEXL group,n=100）The high-dose group of dexmedetomidine (DEXH group,n=100) and the group of esketamine combined with dexmedetomidine (DEXE group,n=100). The DEXL group received 2.5 μ g/kg of dexmedetomidine nasal drops, the DEXH group received 3 μ g/kg of dexmedetomidine nasal drops, and the DEXE group received 2 μ g/kg of dexmedetomidine nasal drops plus 0.5 mg/kg of ketamine nasal drops. Record the success rate of the first dose of nasal sedation, the onset time of sedation, the time of sedation recovery, the quality of recovery, and the satisfaction of the examining physician. Record the vital signs of three groups of patients during the examination process, including before sedation (T0), after successful sedation (T1), after the end of the examination (T2), and upon awakening (T3).
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The first success rate of nasal drip
Timeframe: during the procedure