A comparison of 0.5% ropivacaine and 1% mepivacaine for sciatic nerve block in the popliteal fossa
Background: The purpose of this study was to compare anesthetic efficacy and postoperative analgesia of 0.5% ropivacaine and 1% mepivacaine for sciatic nerve block in the popliteal fossa (popliteal block). Methods: A prospective, double‐blind study was carried out in 58 adult patients scheduled for...
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Published in | Acta anaesthesiologica Scandinavica Vol. 45; no. 8; pp. 967 - 970 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Copenhagen
Munksgaard International Publishers
01.09.2001
Blackwell |
Subjects | |
Online Access | Get full text |
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Summary: | Background: The purpose of this study was to compare anesthetic efficacy and postoperative analgesia of 0.5% ropivacaine and 1% mepivacaine for sciatic nerve block in the popliteal fossa (popliteal block).
Methods: A prospective, double‐blind study was carried out in 58 adult patients scheduled for outpatient foot or ankle surgery. They were randomized to receive popliteal block with 40 ml of either 0.5% ropivacaine (group R) or 1% mepivacaine (group M). An atraumatic, Teflon‐coated needle connected to a neurostimulator was used to make a single puncture using a posterior approach. The times to onset of sensory and motor block, and the need for intraoperative sedation were recorded. Before discharge, patients were asked to document the time to first analgesic use, time to return of full sensation in the foot, and their evaluation of the technique.
Results: Onset time (mean±standard deviation, 95% confidence interval) of both sensory block (6.5±5.1 min, 4.47–8.49, in group R and 6.2±3.7 min, 4.83–7.69, in group M) and motor block (6.6±4.4 min, 4.81–8.23, in group R and 7.9±4.1 min, 6.29–9.53, in group M) was similar in both groups. Postoperative analgesia lasted longer in group R (15.2±5.1 h, 13.25–17.21) than in group M (5.7±1.8 h, 5.01–6.41; P<0.001). Duration of sensory block was longer in group R (20.7±6.2 h, 18.51–23.01) than in group M (6.5±1.7 h, 5.86–7.16; P<0.001). Acceptance of the anesthetic procedure was similar in both groups.
Conclusion: In this study we demonstrated that both 0.5% ropivacaine and 1% mepivacaine for popliteal block produced rapid, effective and safe anesthesia but postoperative analgesia was more long‐lasting with ropivacaine. |
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Bibliography: | istex:8F42E5EF65E5EC709CE42454D16457D796AB3A57 ArticleID:AAS450808 ark:/67375/WNG-D0QJ4BHZ-Z ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 ObjectType-News-3 content type line 23 |
ISSN: | 0001-5172 1399-6576 |
DOI: | 10.1034/j.1399-6576.2001.450808.x |