Geneva, Jan. 12 -- International Clinical Trials Registry received information related to the study (ChiCTR2500115111) titled 'Exploration of the ED50 value and appropriate administration time of alfentanil for preventing rocuronium-induced limb withdrawal movements in children: an age-stratified study' on Dec. 23, 2025.

Study Type: Interventional study

Study Design: Non randomized control

Primary Sponsor: Taizhou Hospital of Zhejiang Province

Condition: children experiencing injection pain of rocuronium

Intervention: Group R2 (6 <= Age<12 years old):The first dose of fentanyl is 20ug/kg, and the interval between the first injection of fentanyl and rocuronium bromide is 60 seconds. By observing whether pediatric patients experienc...