Comparative Study between Lidocaine with levoBupivacaine Versus Lidocaine Bupivacaine mixture for posterior segment surger

Background : Local anesthesia relies on patients ' comfort, safety, and low complication rates. Nature of proposed surgery, surgeon ' s preference, and patients ' wishes all in fl uence anesthetic need for ophthalmic surgery. Objectives : The aim of this work was to compare lidocaine 2% with levobupivacaine 0.5% versus mixture of lidocaine 2% and bupivacaine 0.5% as low-volume local anesthetic for the eye in posterior segment surgery as double-injection peribulbar anesthesia (supratemporal and infratemporal). Patients and methods : Patients were divided into two groups, with 50 ( n ¼ 50) patients each, who were randomized using sealed envelopes: group A received lidocaine 2% with bupivacaine 0.5% double-injection peribulbar anesthesia, and group B received lidocaine 2% with levobupivacaine 0.5% in double-injection peribulbar anesthesia. Results : In group A, block failure was reported in two (4%) patients. In group B, no cases of block failure were reported. Supplementary block was required in two (4%) patients in group A and in one (two) patient in group B. No statistically signi fi cant difference was found between the two groups regarding block failure or need for supplementary block. Conclusion : Group B had quicker onset, longer duration of action, lower pain scores, and less need for postoperative analgesia. No statistically signi fi cant difference was observed between the two groups regarding intraoperative or postoperative problems.