Introduction : Spinal anesthesia is one of the commonest and preferred mode of anesthesia for lower abdominal and lower limb surgeries because of its safety and faster post-operative recovery. Bupivacaine is the commonly used anesthetic for intrathecal administration. Drugs such as Fentanyl, Buprenorphine, Clonidine, Dexmeditomedine have been tried as adjuvants to increase the duration of Analgesia and decrease post-operative pain, but addition of these drugs is wrought with side-effects like hypotension and bradycardia. This study aims to compare the efficacy of Fentanyl and Buprenorphine as adjuvants to intrathecal Bupivacaine in lower abdominal surgeries. Methodology : A total of 112 patients undergoing lower abdominal surgeries where administered either the combination of Buprenorphine with Bupivacaine (56 patients, Group B) or Fentanyl with Bupivacaine (56 patients, Group F). Intraoperatively, patients’ vitals HR, NIBP, SpO2, ECG were monitored every 2 minutes once for the first 10 minutes, every 10 minutes once for the next 50 minutes, and 15 minutes once till the end of surgery. Motor and Sensory blockade, duration of Analgesia and Post-operative pain were also recorded. Results : There was no significant difference in the baseline characteristics and intra-operative vitals between the groups. Patients in Group B had a faster Motor and Sensory blockade, longer duration of analgesia and lesser post-operative pain as compared to Group F. None of he patients included in the study had significant intra-operative hypotension or respiratory depression.
Conclusion : The addition of Buprenorphine to Bupivacaine is more efficacious than the addition of fentanyl to Bupivacaine and leads to better intra-operative and post-operative analgesia withourt significant side-effects.