Modulation of the Surgical Inflammatory Response by Etoricoxib

This study will be a multiple centre, double-blind, placebo-controlled, randomized, parallel group study conducted in male and female adult patients undergoing elective primary single hip arthroplasty. In part 1 of the study 12 patients will be enrolled in the study and will be administrated 120 mg Etoricoxib or placebo orally on day one post surgery. The results from part 1 should help to adjust sampling time points (for blood, cerebrospinal fluid and hip drain fluid) if necessary. In part 2 of the study 40 patients will be enrolled and should receive 120 mg etoricoxib or placebo two hours before and 24 hours after surgery.

Primary end points will be the inflammatory mediators on peripheral and central levels. After surgical manipulation we expect increased mediators on both sides. It will be investigated if the medication could reduce the mediators compared to placebo and if the effect is related to pharmacokinetic parameters.