The efficacy and safety of early initiation of preoperative analgesia with celecoxib in patients underwent arthroscopic knee surgery: A randomized, controlled study.

This study aimed to investigate the efficacy and safety of celecoxib 24hours preoperative, 1hour preoperative, and 4hours postoperative administration in patients with arthroscopic knee surgery (AKS).In all, 206 patients who underwent AKS were consecutively recruited and randomized into 3 groups: (1) early preoperative analgesia group (EPEA), celecoxib 400mg 24hours preoperative administration; (2) preoperative analgesia group (PEA), celecoxib 400mg 1hour preoperative administration; (3) postoperative analgesia group (POA), celecoxib 400mg 4hours postoperative administration. Pain visual analog scale (VAS) scores (at rest and at 90(o) flexion) and patient global assessment (PGA) score were evaluated before and after operation, and also pethidine consumption and adverse events (AEs).The pain-rest VAS score, percentage of patients with moderate-severe pain at rest, and PGA score in the EPEA and PEA groups were decreased compared with POA group at 8 and 12hours postoperation. Besides, pain-flexion to 90(o) VAS score in EPEA and PEA groups were also reduced compared with POA group at 8hours postsurgery. Interestingly, the percentage of patients with moderate-severe pain at 90(o) flexion at 8hours postsurgery in PEA group was fewer compared with POA group, whereas at 4hours postoperation it was reduced in EPEA group compared with PEA and POA groups. As to consumption of pethidine, it was numerically decreased in EPEA and PEA groups compared with POA group. No difference between each 2 groups was found in AEs.Celecoxib was effective and safe as pre-emptive analgesia in AKS, and 1hour administration before operation might be an optimal choice.