A comparison of spinal anesthesia characteristics following intrathecal bupivacaine or levobupivacaine in lumbar disc surgery

Abstract

While bupivacaine is the most frequently used local anesthetic for spinal anesthesia, use of levobupivacaine in clinical practice has advanced recently. The aim of our study was to compare the clinical and anesthetic effects of isobaric bupivacaine and isobaric levobupivacaine when administered intrathecally in patients undergoing lumbar disc surgery. ASA I-III, 60 patients were enrolled in this study. Only patients with unilateral single-level (L4-5) lumbar disc hernia were selected and operated in each group and all were operated by the same surgeon. Patients were randomized into two groups, as group B (n = 30): 15 mg 0.5% isobaric bupivacaine, or group L (n = 30): 15 mg 0.5% isobaric levobupivacaine received intrathecally. The level of sensory block dermatome, degree of motor block, intraoperative sensory and motor block characteristics, and postoperative recovery times of spinal anesthesia were evaluated. The satisfaction scores of the surgeon and patients, intraoperative hemodynamic changes, intraoperative and postoperative complications were recorded. The maximum level of sensory blockade was significantly higher in the levobupivacaine group (group L 7 ± 1.63, group B 8.6 ± 1.76 thoracic dermatome, p < 0.05). There was no significant difference in the onset time of sensory (group L 6 ± 3 min, group B 9 ± 4 min) and motor (in group L 7 ± 3 min, in group B 10 ± 4 min) blockade (p > 0.05). There was no significant difference between the groups regarding duration of operation (group L 49 ± 7.3 min, group B 52 ± 8.1, p > 0.05). Recovery times of sensory (175 ± 57 min) and motor (216 ± 59 min) blockade were significantly shorter in the levobupivacaine group (p < 0.05). Mobilization was also earlier in the levobupivacaine group (339 ± 90 min, p < 0.05). Patients' satisfaction and intraoperative, postoperative complications were similar between the two groups. Our results showed that block recovery time was shorter in the levobupivacaine group, this may be a disadvantage for longer operative procedures. But with proper patient selection this can be eliminated. Recovery time was shorter in levobupivacaine group. Therefore, postoperative neurological examination can be done earlier. In addition, early mobilization can be an advantage for postoperative recovery.