Preemptive Analgesia with Parecoxib in Total Hip Arthroplasty: A Randomized, Double-Blind, Placebo-Controlled Trial.

Background: Total hip arthroplasty (THA) is a well-accepted surgical treatment for terminal hip diseases.

Objective: To evaluate the effect of preemptive analgesia with parecoxib in patients undergoing primary unilateral THA.

Study Design: A randomized, double-blind, placebo-controlled study.

Setting: This study was conducted at Peking Union Medical College Hospital and Beijing Jishuitan Hospital in Beijing, China.

Methods: A total of 94 patients scheduled for primary unilateral THA in 2 centers (Peking Union Medical College Hospital and Beijing Jishuitan Hospital) were randomly assigned to receive 40 mg parecoxib (n = 48) or 0.9% normal saline solution (n = 46) 30 minutes before incision. All patients received standardized intravenous patient-controlled analgesia (PCA) postoperatively. Preoperative baseline data, surgery-related conditions, postoperative Visual Analog Scale (VAS) pain score, cumulative narcotic consumption of PCA, and complications were compared between the parecoxib group and the placebo group.

Results: There were no significant differences in postoperative VAS pain score, cumulative narcotic consumption of PCA, proportion of analgesic remedy, and complications between the 2 groups.

Limitations: Only a single dose of parecoxib was used without including a dose-dependent control group.

Conclusion: A single dose of parecoxib 30 minutes before incision did not provide effective preemptive analgesia for the management of postoperative pain after primary unilateral THA. The possible effect of preemptive analgesia with parecoxib needs further investigation.

Key Words: Total hip arthroplasty, pain, parecoxib, COX-2 selective inhibitor, preemptive analgesia, clinical trial, patient-controlled analgesia, analgesics.