Fig. 1From: Two-center randomized controlled trial comparing oral chloral hydrate and intranasal combination of dexmedetomidine and ketamine for procedural sedation in children: study protocolSchedule for enrollment, interventions, and assessment. T0, baseline before administration of sedative; T1, administration of sedative; T2, when the procedure starts; T3, when the procedure ends; T4, when the patients wakes up (pediatric sedation state scale = 4, or 5), T5, 2Â h from T4Back to article page