Brazilian Journal of Anesthesiology
https://bjan-sba.org/article/doi/10.1590/S0034-70942003000200006
Brazilian Journal of Anesthesiology
Scientific Article

Analgesia pós-operatória em cirurgia ortopédica: estudo comparativo entre o bloqueio do plexo lombar por via perivascular inguinal (3 em 1) com ropivacaína e a analgesia subaracnóidea com morfina

Postoperative analgesia following orthopedic surgery: a study comparing perivascular lumbar plexus inguinal block with ropivacaine (3 in 1) and spinal anesthesia with morphine

Neuber Martins Fonseca; Roberto Araújo Ruzi; Fernando Xavier Ferreira; Fabrício Martins Arruda

http://dx.doi.org/10.1590/S0034-70942003000200006 Braz J Anesthesiol, vol.53, n2, p.188-197, 2003
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Resumo

JUSTIFICATIVA E OBJETIVOS: O bloqueio do plexo lombar pelo acesso perivascular inguinal, chamado de bloqueio 3 em 1, tem sido utilizado para analgesia pós-operatória. O objetivo deste estudo foi comparar a analgesia pós-operatória do bloqueio 3 em 1 a da morfina subaracnóidea em pacientes submetidos a cirurgias ortopédicas em membro inferior (MI). MÉTODO: Foram estudados 40 pacientes escalados para cirurgia ortopédica de MI, de ambos os sexos, estado físico ASA I e II, com idades entre 15 e 75 anos, distribuídos em 2 grupos (M e BPL). Foi realizada anestesia subaracnóidea em todos os pacientes, em L3-L4 ou L4-L5, com 20 mg de bupivacaína isobárica a 0,5%. No grupo M (n = 20) foi associado 50 µg de morfina ao anestésico local. No grupo BPL (n = 20) foi realizado o bloqueio 3 em 1 ao término da cirurgia, utilizando 200 mg de ropivacaína a 0,5%. Avaliou-se a analgesia e a intensidade da dor às 4, 8, 12, 14, 16, 20 e 24 horas após o término da cirurgia, o nível do bloqueio subaracnóideo, o tempo cirúrgico e as complicações. RESULTADOS: A duração da analgesia no grupo BPL foi de 13,1 ± 2,47, enquanto no grupo M todos os pacientes referiam dor e ausência de bloqueio motor no primeiro instante avaliado (4 horas). Houve falha do bloqueio de um dos 3 nervos em 3 pacientes. A incidência de náusea e prurido foi significativamente maior no grupo M. Quanto à retenção urinária, não houve diferença significante entre os grupos. Não houve depressão respiratória, hipotensão arterial ou bradicardia. A analgesia pós-operatória foi mais efetiva no grupo BPL, comparada ao grupo M às 4, 8, 12,14 e 16 horas. Às 20 e 24 horas não houve diferença significante entre os grupos. CONCLUSÕES: A analgesia pós-operatória proporcionada pelo bloqueio 3 em 1 apresentou efeitos colaterais inferiores à morfina subaracnóidea com tempo de analgesia semelhante.

Palavras-chave

ANALGESIA, ANALGÉSICOS, ANALGÉSICOS, ANESTÉSICOS, ANESTÉSICOS, TÉCNICAS ANESTÉSICAS, TÉCNICAS ANESTÉSICAS, TÉCNICAS ANESTÉSICAS

Abstract

BACKGROUND AND OBJECTIVES: Perivascular Lumbar plexus inguinal block, (3-in-1 block) has been used for postoperative analgesia. This study aimed at comparing postoperative analgesia of 3-in-1 block and spinal morphine in patients submitted to lower limb orthopedic surgeries (LL). METHODS: Forty ASA I - II patients of both genders, aged 15 to 75 years, scheduled for LL orthopedic surgeries, were distributed in two groups: (M and LPB). Spinal anesthesia was performed in all patients at L3-L4 or L4-L5 with 20 mg of 0.5% isobaric bupivacaine. In group M (n = 20), 50 µg morphine were associated to local anesthetics. In group LPB (n = 20) 3-in-1 blockade was performed after surgery with 200 mg of 0.5% ropivacaine. Analgesia and pain intensity were evaluated at 4, 8, 12, 14, 16, 20 and 24 hours after surgery completion, in addition to spinal blockade level, surgery duration and complications. RESULTS: Analgesia duration in group LPB was 13.1 ± 2.47 while all group M patients referred pain and lack of motor block in the first moment evaluated (4 hours). There has been blockade failure in one of the three nerves in three patients. The incidence of nausea and pruritus was significantly higher in group M. There was no significant difference between groups in urinary retention. There were no respiratory depression, arterial hypotension or bradycardia. Postoperative analgesia was more effective in group LPB as compared to group M at 4, 8, 12, 14 and 16 hours. There were no significant differences between groups at 20 and 24 hours. CONCLUSIONS: Postoperative analgesia induced by 3-in-1 blockade showed less side-effects as compared to spinal morphine with similar analgesia duration.

Keywords

ANALGESIA, ANALGESICS, ANALGESICS, ANESTHETICS, ANESTHETICS, ANESTHETIC TECHNIQUES, ANESTHETIC TECHNIQUES, ANESTHETIC TECHNIQUES

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