Opioids are well studied adjuncts, although the evidence regarding the analgesic benefit of opioid adjuncts remains equivocal. The effectiveness of 0.5% Bupivacaine and 0.5% Bupivacaine plus buprenorphine into brachial plexus sheath was evaluated. The study was a prospective, randomized, double blind and comparative study carried out; 60 ASA I and II patients undergoing elective upper limb surgeries, aged between 16-70 years were randomly allocated into two groups of 30 each. All patients received 0.5% of Bupivacaine at 2mg/kg body weight. In addition, 30 patients in group B received Buprenorphine hydrochloride (2µg/kg). Using VAS score the analgesia was evaluated every hourly for six hours, every two hours for next twelve hours and then every sixth hourly till 48 hours.
RESULTA significant difference in the duration of analgesia was found between the groups. The duration of analgesia was longer in Bupivacaine plus Buprenorphine group than Bupivacaine group (22.18+/-12.13 hrs versus 14.13+/-8.41 hrs).
CONCLUSIONWe conclude that Buprenorphine as an adjunct administered with local anesthetics into brachial plexus sheath is an efficient way to prolong the duration of analgesia for the peri-operative pain in upper limb surgery.