2Kreehel SW, Eggers GWN. Intrathecal mor- phine for postoperative analgesia in an infant with bronchopulmonary dysplasia following up- per abdominal surgery[ J]. Paediatric Anesthe- sia ,2006,6:423 - 426.
3Williams RK, McBride WJ, Abajian JC, et al. Combined spinal and epidural anaesthesia for major abdominal surgery in infants [ J 1. Can Anaesth,2007,44 (5) :511.