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Background and Aims In this prospective study, the effect of adding dexamethasone to bupivacaine on the quality of axillary block under ultrasound guidance was evaluated
Methods 72 patients with ASA class I, II and over 18 years of age who are candidates for elective forearm surgery under axillary plexus block, in random blocks prepared from the computer system in two groups: group BD: 30 ml bupivacaine 0.25% with 2 ml dexamethasone (n=36) and group B: 30 ml bupivacaine 0.25% with 2 ml distilled water (n=36). To evaluate the level of sensory and motor block, respectively Pinprick test and Modified Bromage Scale were used, and VAS score and Ramsay score were used to evaluate pain intensity and degree of sedation, respectively. The collected data were analyzed through SPSS V.24 software and the significance level was also considered for P<0.05 values.
Results there was a statistically significant difference between the average sensory (P<0.0001) and motor (P<0.0001) onset time between the two groups, and it was shorter in group BD than in the group B. There was a statistically significant difference between the average duration of sensory and motor block (P<0.0001) and intensity of sensory block (P<0.0001) and motor (P=0.002) in the two groups.The changes in the degree of sedation in the studied time periods after the start of the block in the bubivacaine and dexamethasone group were more than in the group without dexamethasone (P<0.0001).
Conclusions Adding dexamethasone to bupivacaine is effective in prolonging the axillary block time and reducing pain after surgery
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