Effective Anesthetic Volumes In Sciatic Nerve Block: Comparison between the Parasacral and Infragluteal-parabiceps Approaches with 0.5% Bupivacaine with Adrenaline and 0.5% Ropivacaine
| Autor: | Maurício Sperotto Ceccon, Julian Alexander Knaesel, Adilson José Dal Mago, Pablo Escovedo Helayel, Diogo Brüggemann da Conceição, Getúlio Rodrigues de Oliveira Filho |
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| Jazyk: | angličtina |
| Předmět: |
Adult
Male medicine.medical_specialty Epinephrine TÉCNICAS ANESTÉSICAS Regional: bloqueio do nervo isquiático ANESTÉSICO LOCAL: bupivacaína Double-Blind Method Sciatic nerve block Peripheral nerve medicine Humans Ropivacaine Prospective Studies Anesthetics Local ANESTHETIC TECHNIQUES Regional: sciatic nerve block Bupivacaine ropivacaína business.industry Nerve Block Amides Sciatic Nerve ANESTHETIC Local: bupivacaine ropivacaine Anesthetics Combined Surgery Anesthesiology and Pain Medicine Anesthesia Anesthetic Female Sciatic nerve Effective volume business medicine.drug |
| Zdroj: | Brazilian Journal of Anesthesiology. (5):521-530 |
| ISSN: | 0034-7094 |
| DOI: | 10.1016/S0034-7094(09)70077-7 |
| Popis: | SummaryBackground and objectivesThe volume and mass of local anesthetics (LA) affect the success rate of peripheral nerve blocks. Thus, the main objective of this study was to determine the volumes of local anesthetics in parasacral and infragluteal-parabiceps sciatic nerve block (SNB).MethodsOne hundred and one patients undergoing infragluteal-parabiceps or parasacral SNB with 0.5% ropivacaine or 0.5% bupivacaine with 5 μg.mL-1 of adrenaline were randomly divided into 4 groups. Success was defined as complete sensitive and motor blockades of the sciatic nerve 30 minutes after the administration of the LA. Volumes were calculated by the up-and-down method.ResultsIn the parasacral approach, the mean effective volume of ropivacaine was 17.6 mL (95% CI: 14.9-20.8) and of bupivacaine it was 16.4 mL (95% CI: 12.3-21.9). In the infragluteal-parabiceps approach, the mean effective volume of ropivacaine was 21.8 mL (95% CI: 18.7-25.5), and that of bupivacaine was 20.4 mL (95% CI: 18.6-22.5). Volumes were significantly lower (p < 0.01) in the parasacral than in the infragluteal-parabiceps approach. In Probit regression, the estimated effective volume in 95% of the patients in the parasacral approach was 21.8 mL for ropivacaine, and 20.5 mL for bupivacaine; in the infragluteal-parabiceps approach the volumes were 27.2 mL for ropivacaine and 25.5 mL for bupivacaine. The effective volume in 99% of the patients in parasacral SNB was 24 mL for ropivacaine, and 24 mL for bupivacaine; and in the infragluteal-parabiceps approach, 29.9 mL for ropivacaine, and 28.0 mL for bupivacaine.ConclusionsIn sciatic nerve block, significantly smaller volumes were necessary in the parasacral than in the infragluteal-parabiceps approach, but volumes did not differ between both LAs. |
| Databáze: | OpenAIRE |
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