Study Status: Withdrawn
Recruit Status: Unknown status
Study Type: Interventional
Official Title: Phase 1 Study of Circadian Rhythm of Salivary Cortisol in Health Children ;Phase 2 Study of Circadian Rhythm of Salivary Cortisol of Children Undergoing Surgery Using Etomidate or Not Using Etomidate.
Brief Summary: Etomidate is an unique drug used for induction of general anesthesia and sedation. Adrenal cortical inhibition by etomidate has received much attention. However wether the circadian rhythm and pulse secretion pattern of cortisol in children are the same as that in adults is not known. Moreover, the effect of etomidate on circadian rhythm changes and clinical outcomes has never been carefully studied in children undergoing surgery. Our hypothesis is that etomidate can relieve the changes of circadian rhythm of salivary cortisol in children for 24-48 hours，and this does not make clinical outcomes worse postoperatively.