Preoperative Sleep Intervention on Postoperative Delirium in School-aged Children Undergoing Congenital Heart Surgery

After enrollment in the experimental group, the guardians were asked to fill out a sleep diary every day before surgery to self-report the children's sleep, and to wear a somatic movement recorder to monitor sleep (non-dominant arm) (wGT3x-BT accelerometer, ActiGraph) during the preoperative hospitalization period, except during surgery, and then to wear it to record the sleep-related parameters until 7 days after surgery or before discharge from the hospital.Preoperative daily cognitive-behavioral interventions (developmental trials were guided with WeChat applets), including cognitive change, sleep hygiene, sleep restriction, stimulus control, and relaxation training