RESUMEN
Soft tissue injuries, such as tendons or ligaments, are common problems causing pain and functional disorders. The aim of this study was to investigate the effect of local infiltration of morphine in reducing the post operative pain in soft tissue injuries. In a double blind clinical trial study, 80 patients with soft tissue injury who were admitted in Kashani hospital, Shahrekord, Iran, were divided into 2 groups: control group received local placebo [normal saline] and case group received local morphine. Severity of pain was measured using a scale questionnaire 3, 10 and 24 hours after the surgery. Data were analyzed using dependent t-test, Chi square and Fisher tests. The results of this study showed that mean age was 32.5 +/- 6.34 years for control group and 30.6 +/- 7.7 years for case group. Mean incision length was found 5.5 cm for control group and 5.57 cm for case group [P<0.05]. A significant decrease in severity of pain was found 2, 10 and 24 hours after the operation in patients who received local morphine compared with control group [P<0.05]. Infiltration of morphine has good advantages in reducing pain in patients with soft tissue injury after the operation