Objective 　To investigate the effectiveness of pretreatment with mixture of lidocaine and flurbiprofen axetil in reducing injection pain of propofol.
Methods 　One hundred and sixty ASI I–II patients undergoing general anaesthesia were randomly allocated into four groups (40 cases in each group): the control group, the lidocaine (Lc) group, the flurbiprofen axetil (FA) group and the mixture of lidocaine and flurbiprofen axetil (hereafter termed as “mixture”) group. After the occlusion of venous drainage, patients were pretreated with 7 mL of 0.9% saline in the control group, 5 mL (50 mg) of flurbiprofen axetil and 2 mL of 0.9% saline in the FA group, 2 mL (40 mg) of 2% lidocaine and 5 mL of 0.9% saline in the Lc group, and 5 mL (50 mg) of flurbiprofen axetil and 2 mL (40 mg) of 2% lidocaine in the mixture group, respectively. The occlusion was released 2 min later and then 0.5 mg/kg propofol was injected into the vein within 5 s. During injecting propofol, the patients were asked by another anesthetist to assess and record their pain through using VSR.
Results 　No significant differences in the demographic characteristics were found among the four groups. In comparison with the control group, the incidence rates of propofol injection pain were obviously lower in the mixture group, the FA group and the Lc group (P lt;0.05); there was a significant reduction in the incidence rate of pain in the mixture group compared with the other three groups. The median pain score was significantly lower in the mixture group and the Lc group than that in the control group. During the 24 hour follow-up after operation, neither the adverse events such as red-swelling in injection site, phlebitis or drug eruption, nor the gastrointestinal stimulating signs were found.
Conclusion 　The mixture of flurbiprofen axetil and lidocaine is found to be more effective in reducing injection pain of propofol.

Citation： LI Yi,SI Qi,JIANG Xiaojing. Pretreatment with Mixture of Flurbiprofen Axetil and Lidocaine in Reducing Injection Pain of Propofol: A Randomized Controlled Trial. Chinese Journal of Evidence-Based Medicine, 2011, 11(11): 1247-1250. doi: 10.7507/1672-2531.20110210 Copy