SUB-TENON'S BLOCK IN CATARACT SURGERY A COMPARISON OF 2% ARTICAINE AND A MIXTURE OF 2% LIGNOCAINE AND 0.5% BUPIVACAINE
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Articaine is a novel amide local anaesthetic with a shorter duration of action than prilocaine. Sub-Tenon's anaesthesia arguably provides a safer method of anesthetic delivery for cataract surgery. In our study we compared 2% articaine with mixture of 2% lignocaine and 0.5% bupivacaine through sub-Tenon's block for cataract surgery. 60 AM (American Society of Anesthesiologists) patients were selected for comparison and allocated in two equal groups in randomized double-blinded study. We found that sub-Tenon's block using articaine 2% resulted in a more rapid onset of motor block than lidocaine / bupivacaine mixture (mean time to readiness for surgery was 3.3 + 2.4 (SD) min. in articaine group vs. 5.1 + 3.2 (SD) min. in lidocaine/bupivacairte group (p=0.0077). Ocular movement scores were signylcantly lower from 2 min. after injection until the end of surgery p = 0.021 (p 50.05) We conclude that articaine 2% S safe and effective in sub-Tenon's block for cataract surgery and is a suitable and more convenient single drug alternative to the traditional mixture of 2% lignocaine and 0.5% bupivacaine.