Brazilian Journal of Pain
Brazilian Journal of Pain
Original Article

Spinal anesthesia with bupivacaine and fentanyl associated with femoral nerve block in postoperative analgesia in the reconstruction of the anterior cruciate ligament

Raquianestesia com bupivacaína e fentanil associada ao bloqueio do nervo femoral na analgesia pós-operatória na reconstrução do ligamento cruzado anterior

Ursula Bueno do Prado Guirro; Elizabeth Milla Tambara; Ricardo Rasmussen Petterle

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BACKGROUND AND OBJECTIVES: To evaluate postoperative analgesia and the need for tramadol in patients undergoing reconstruction of the anterior cruciate ligament with spinal anesthesia, fentanyl and femoral nerve block.

METHODS: 166 patients were divided into four groups (G). All patients received spinal anesthesia with 15mg of isobaric bupivacaine at 0.5%. In the G2 and G3 groups, 25µg of fentanyl was associated with bupivacaine and in groups G3 and G4 femoral nerve block was associated with 100mg of bupivacaine at 0.5%, without vasoconstrictor. Patients received timed dipyrone and ketoprofen and were instructed to request tramadol if the pain was ≥4 on the numerical scale. After 6, 12 and 24 hours of spinal anesthesia, the score was recorded on the numerical scale, the request of tramadol and adverse events.

RESULTS: Mean pain scores at 6 and 24 hours were not different. In the 12-hour evaluation, there was a difference only in G4 in relation to G1 (p=0.01). Tramadol was requested by 46.7% in G1, 52.9% in G2, 18.6% in G3 and 36.4% in G4 (p=0.009), with a difference between G1 and G3 and also between G2 and G3.

CONCLUSION: The association of spinal anesthesia and femoral nerve block in G4 provided lower pain scores in the evaluation at 12 hours after anesthesia. On the other hand, the highest indices were observed in G2, spinal anesthesia with fentanyl. Pain scores at 6 and 12 hours were similar. The highest consumption of analgesics occurred in those who reported more pain in G2.


Anterior cruciate ligament reconstruction, Femoral nerve block, Fentanyl, Spinal anesthesia


JUSTIFICATIVA E OBJETIVOS: Avaliar a analgesia pós-operatória e a necessidade de tramadol nos pacientes submetidos à operação de reconstrução do ligamento cruzado anterior com raquianestesia, fentanil e bloqueio do nervo femoral.

MÉTODOS: Cento e sessenta e seis pacientes foram divididos em quatro grupos (G). Todos os pacientes receberam raquianestesia com 15mg de bupivacaína isobárica a 0,5%. Nos grupos G2 e G3 foi associado 25µg de fentanil à bupivacaína e nos grupos G3 e G4 foi associado bloqueio do nervo femoral com 100mg de bupivacaína a 0,5% sem vasoconstritor. Os pacientes receberam dipirona e cetoprofeno de horário e eram orientados a solicitar tramadol caso a dor estivesse ≥4 na escala numérica. Após 6, 12 e 24 horas da raquianestesia foi registrado o escore na escala numérica, a solicitação de tramadol e eventos adversos.

RESULTADOS: Os escores médios de dor 6 e 24 horas não foram diferentes. Na avaliação 12 horas houve diferença apenas no G4 em relação ao G1 (p=0,01). O tramadol foi solicitado por 46,7% no G1, 52,9% no G2, 18,6% no G3 e 36,4% no G4 (p=0,009), com diferença entre G1 e G3 e também entre G2 e G3.

CONCLUSÃO: A associação de raquianestesia e bloqueio do nervo femoral no G4 proporcionou menores escores de dor na avaliação 12 horas após a anestesia, por outro lado os índices mais elevados foram observados na raquianestesia com fentanil do G2. As avaliações de dor em 6 e 12 horas foram semelhantes. O maior consumo de analgésicos ocorreu naqueles que relataram mais dor no G2.


Bloqueio do nervo femoral, Fentanil, Raquianestesia, Reconstrução do ligamento cruzado anterior


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