• Rajesh Prabhu, Dewan Roshan Singh, and N Krishnaveni.
• Department of Critical Care Medicine, Mahatma Gandhi Medical College and Research Institute, Sri Balaji Vidyapeeth University, Puducherry, India.
• Anesth Essays Res. 2017 Oct 1; 11 (4): 934-939.

BackgroundPain after open inguinal hernia surgery can be moderate to severe and is known to prolong hospital stay and delay return to normal daily activities.SettingsA randomized controlled trial conducted in the Department of Anesthesiology in a tertiary care hospital.Aims And ObjectivesTo compare the efficacy of postoperative analgesia provided by equal volumes of 0.125% and 0.25% bupivacaine administered in an ultrasound (US)-guided transversus abdominis plane (TAP) block in patients undergoing unilateral inguinal hernia repair.Materials And MethodsAfter obtaining Institutional Ethics Committee approval and informed consent, sixty patients posted for inguinal hernia repair were recruited. Randomization was done using a sealed envelope technique. Patients were divided into two groups; Group 0.125 received 20 ml of 0.125% bupivacaine and Group 0.25 received 20 ml of 0.25% bupivacaine through US-guided TAP block at the end of surgery. Visual analog scale (VAS) scores and duration of analgesia were recorded.ResultsThere was no significant difference in the VAS scores among both groups. The duration of analgesia provided by 0.25% bupivacaine was significantly longer than that provided by 0.125% (Group 0.125 - 355.67 ± 118.88 min and Group 0.25 - 635.73 ± 195.58 min; P < 0.05). No complications were noted in both groups.ConclusionThe duration of analgesia provided by 0.25% bupivacaine was significantly longer than that provided by 0.125% bupivacaine through US-guided TAP block in inguinal hernia repair.

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