Analgesic effects of low -dose trama dol after arthroscopic knee surgery

Objective To investigate analgesic effect of i ntra -articular low -dose tramadol a fter arthroscopic knee surgery.Methods60patients undergoing arthroscopic k nee surgery under lumbar anesthesia were randomly divided into intra -ar ticular injection of tramadol(TJ group),mulscle injection of tramadol(TM)and saline control group.Vision analog scoring was conducted under exte nsion of knee joint 8h and24h after drugs administration.Follow -up was done to observe unwanted e ffects 48h after surgery.Results Score of TJ group was significantly lower than those of other groups(P <0.05).No unwanted effects were found.Conclusion Intra -articular tramadol in low -dose could relieve operative pain.