Anesthesia: Essays and Researches 2017 11(3):730-739
Context: Anesthesia and analgesia for surgeries to the upper extremity are commonly provided using brachial plexus anesthesia. There are limited or almost no studies comparing the use of ropivacaine with fentanyl to ropivacaine with dexmedetomidine. Aims: To compare the efficacy of fentanyl and dexmedetomidine as adjuvants to ropivacaine for brachial plexus block among patients undergoing upper limb orthopedic surgeries. Settings and Design: This was a prospective, randomized, double-blinded study. Subjects and Methods: The patients were randomly divided into three groups of 35 each using computerized randomization table. Group I patients received 3 mg/kg of 0.75% ropivacaine with 1 μg/kg of fentanyl diluted with normal saline (NS) to make a total volume of 35 ml. Group II patients received 3 mg/kg of 0.75% ropivacaine with 1 μg/kg of dexmedetomidine diluted with NS to make a total volume of 35 ml. Group III patients received 3 mg/kg of 0.75% ropivacaine with NS making a total volume of 35 ml. Statistical Analysis Used: Statistical analysis was performed using Statistical Package for Social Sciences, version 15.0. Analysis of variance followed by independent samples t-test was performed for parametric data, and Kruskal–Wallis test followed by Mann–Whitney U-test was performed for nonparametric data. Results: Mean motor and sensory block onset time was minimum in Group I and maximum in Group III while mean duration of sensory and motor block was maximum in Group I and minimum in Group III. Time taken for first rescue analgesic dose was also maximum in Group I and minimum in Group III. Conclusions: It can be concluded that 3 mg/kg of 0.75% ropivacaine along with 1 μg/kg of fentanyl diluted with NS to make a total volume of 35 ml was the most efficacious regimen for brachial plexus block among patients undergoing upper limb orthopedic surgeries.
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