This study aims to compare the effect of paravertebral block and local infiltration anesthesia on postoperative analgesia in children undergoing lateral incision cardiac surgery with cardiopulmonary bypass. The researchers hope to investigate whether children who undergo paravertebral block experience less postoperative pain, have fewer postoperative complications, and recover more quickly.

Inclusion Criteria:

1. Children aged 6-14 years old;
2. Children who have atrial septal defect or ventricular septal defect scheduled for lateral incision cardiac surgery with cardiopulmonary bypass;
3. Inform consent signed by the parent or legal guardian.

Exclusion Criteria:

1. Patients who were intubated, on mechanical circulatory support, or with intravenous inotropes before surgery;
2. Emergency surgery or redo cardiac surgery;
3. Body weight more than 50kg;
4. Diagnosed as severe pulmonary hypertension;
5. Left ventricular ejection fraction less than 45% in most recent echocardiography before surgery;
6. Allergic to ropivacaine or other regular anesthetics, analgesics or other medications regularly used in the study;
7. Preoperative platelet counts less than 100*109/L, coagulopathy or bleeding tendency ;
8. Preoperatively using antiplatelets or anticoagulants;
9. Diagnosed with scoliosis or other contraindications for PVB.

The original data will be published in 2025 on http://www.medresman.org.cn

2025.1-2026.1