Continuous fentanyl infusion reduces intra-abdominal pressure, postoperative pain and normalizes lungs’ mechanical changes in newborn with viscera-abdominal disproportion in early post-operative period. PMJUA [Internet]. 2021 Nov. 15 [cited 2026 Sep. 16];6(3):18-23. Available from: https://painmedicine.org.ua/index.php/pnmdcn/article/view/267