Under ultrasound guidance, the probe was transversely placed at the lateral level of the umbilicus . Using the in-plane technique, the needle was advanced until the posterior aspect of the rectus muscle was penetrated. No blood and no gas were drawn back; furthermore, a small volume of saline was initially injected to ensure that the needle tip was correctly positioned. When the needle was located between the posterior rectus muscle and posterior sheath, 5ml of 0.25% ropivacaine was injected bilaterally.

Do nothing with it

Local anesthesia drugs were injected into the peri-umbilicus cord

Under ultrasound guidance, the probe was transversely placed at the lateral level of the umbilicus . Using the in-plane technique, the needle was advanced until the posterior aspect of the rectus muscle was penetrated. No blood and no gas were drawn back; furthermore, a small volume of saline was initially injected to ensure that the needle tip was correctly positioned. When the needle was located between the posterior rectus muscle and posterior sheath, 5ml of 0.25% ropivacaine was injected bilaterally

The Face Legs Activity Cry Consolability (FLACC) scale method is an effective method mainly used for postoperative pain assessment in children . It includes 5 contents: Face, Legs, Activity, Cry and Consolability. Each item is scored on a scale of 0 to 2, with the highest total score being 10. Using the FLACC scale method, doctors need to observe children for 1 to 15 minutes. The pain score is obtained by the medical staff according to the observed children's situation and the content in the quantification table. The total score is obtained by adding up the scores of each content, ranging from 0 to 10. The higher the score, the higher the pain. Doctors can observe children during routine checkups. Touch and change the child's position to determine the child's pain and better assess its body tension and resistance.

The PAED scale is a reliable tool for assessing postoperative delirium in children, including 5 scoring items, namely eye contact with caregivers, purposeful activities, cognition of the surrounding environment, and the uneasiness and comfort of children. Each evaluation item can be divided into levels 1 to 5 according to the degree, with 0 to 4 points respectively, and the maximum total score is 20 points. A score of ≥10 on the PAED scale indicates the presence of postoperative delirium, and a score of ≥15 indicates the presence of severe postoperative delirium

The cumulative use of remifentanil and propofol during the operation.