Introduction. The aim of the study was to compare the sensory, motor, and neuroophthalmological effects of isobaric\nlevobupivacaine and bupivacaine when intrathecally administered. Materials and Methods. A prospective, double-blind, randomized\nstudy with 60 ASA grade I-II patients aged 18ââ?¬â??65 years awaiting knee arthroscopy under spinal anesthesia. Patients\nreceived 12.5 mg of isobaric bupivacaine or levobupivacaine. Several features were recorded. Results. No significant intergroup\ndifferences were observed for ASA classification, time to micturate, demographic data, surgery duration, and patient/surgeon\nsatisfaction. Similar hemodynamic parameters and sensory/motor blockade duration were found for both groups. There were no\nneuroophthalmological effects in either group. Sensory (P = 0.018) and motor blockade onset (P = 0.003) was faster in the\nbupivacaine group. T6 (T2ââ?¬â??T12) and T3 (T2ââ?¬â??T12) were the highest sensory block levels for the levobupivacaine and bupivacaine\ngroups, respectively (P = 0.008). It took less time to regain maximum motor blockade in the bupivacaine group (P = 0.014), and\nthe levobupivacaine group required use of analgesia earlier (P = 0.025). Conclusions. Isobaric bupivacaine and levobupivacaine are\nanalogous and well-tolerated anesthetics for knee arthroscopy. However, for bupivacaine, sensory and motor blockade onset was\nfaster, and greater sensory blockade with a longer postoperative painless period was achieved.
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