• Cengiz Isik, Abdullah Demirhan, Tevfik Yetis, Korgun Okmen, Hakan Sarman, Umit Yasar Tekelioglu, and Turan Duran.
• Department of Orthopedics and Traumatology, Faculty of Medicine, Abant İzzet Baysal University Medical School, Abant İzzet Baysal University, 14280, Gölköy, Bolu, Turkey, drcengiz034@yahoo.com.
• Knee Surg Sports Traumatol Arthrosc. 2015 Sep 1; 23 (9): 2721-6.

PurposeTo evaluate the efficacy of intraarticular injection of ketamine or ketamine plus levobupivacaine on post-operative analgesia in patients undergoing arthroscopic meniscectomy.MethodsA prospective, randomized, double-blind study was performed on 60 patients aged 18-65 years who planned to undergo elective arthroscopic meniscectomy. The patients were divided into three groups: the ketamine group (n = 20) received 1.0 mg/kg of intraarticular ketamine in 20 ml of normal saline, the ketamine-levobupivacaine group (n = 20) received 0.5 mg/kg of intraarticular ketamine plus 50.0 mg of 0.25 % levobupivacaine in 20 ml of normal saline, and the control group (n = 20) received 20 ml of intraarticular normal saline. A visual analogue scale (VAS) was used to determine the efficacy of analgesia at 1, 2, 4, 6, 8, 12, and 24 h post-operatively.ResultsThere were statistically significant differences in the median VAS scores among the three groups according to Bonferroni adjustment at all time points (p < 0.01), with the exception of 6 and 24 h post-operatively. The median VAS scores at 1, 2, and 4 h post-operatively were higher in the control group than in the two treatment groups (p < 0.001). The median VAS scores in the control group at 1, 2, 4, 6, 8, and 12 h post-operatively and those in the ketamine group at 4, 8, and 12 h post-operatively were significantly higher than those in the ketamine-levobupivacaine group (p < 0.05).ConclusionIntraarticular ketamine provides effective post-operative analgesia. Addition of intraarticular levobupivacaine to ketamine may provide better amelioration of pain after outpatient arthroscopic meniscectomy.

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