Department of Anesthesiology Qilu Hospital of Shandong University Jinan 250012 Shandong Province China;
Department of Radiology Qilu Hospital of Shandong University Jinan 250012 Shandong Province China;
Department of General Surgery Qilu Hospital of Shandong University Jinan 250012 Shandong Province China;
Analgesic effect; Parecoxib; Ropivacaine; Laparoscopic hepatectomy;