Analgesia Nociception Index for perioperative analgesia monitoring in spinal surgery / Índice de analgesia/nocicepção para monitorização da analgesia perioperatória na cirurgia da coluna vertebral

Abstract Background and objectives: The Analgesia Nociception Index is an index used to measure the levels of pain, sympathetic system activity and heart rate variability during general anesthesia. In our study, Analgesia Nociception Index monitoring in two groups who had undergone spinal stabilization surgery and were administered propofol-remifentanil (Total Intravenous Anesthesia) and sevoflurane-remifentanyl anesthesia was compared regarding its significance for prediction of postoperative early pain. Methods: BIS and Analgesia Nociception Index monitoring were conducted in the patients together with standard monitoring. During induction, fentanyl 2 µg.kg-1, propofol 2.5 mg.kg-1 and rocuronium 0.6 mg.kg-1 were administered. During maintenance, 1.0 MAC sevoflurane + remifentanil 0.05-0.3 µg.kg-1.min-1 and propofol 50-150 µg.kg-1.min-1 + remifentanil 0.05-0.3 µg.kg-1.min-1 were administered in Group S and Group T, respectively. Hemodynamic parameters, BIS and Analgesia Nociception Index values were recorded during surgery and 30 min postoperatively. Postoperative visual analog scale (VAS) values at 30 minutes were recorded. Results: While no difference was found between mean Analgesia Nociception Index at all times of measurement in both groups, Analgesia Nociception Index measurements after administration of perioperative analgesic drug were recorded to be significantly higher compared to baseline values in both groups. There was correlation between mean values of Analgesia Nociception Index and VAS after anesthesia. Conclusion: Analgesia Nociception Index is a valuable parameter for monitoring of perioperative and postoperative analgesia. In spine surgery, similar analgesia can be provided in both Total Intravenous Anesthesia with remifentanil and sevoflurane administration. Analgesia Nociception Index is efficient for prediction of the need for analgesia during the early postoperative period, and therefore is the provision of patient comfort.

Resumo Justificativa e objetivos: O índice de analgesia/nocicepção (ANI) é usado para medir os níveis de dor, a atividade do sistema simpático e a variabilidade da frequência cardíaca durante a anestesia geral. Em nosso estudo, a monitoração do ANI em dois grupos que foram submetidos à cirurgia de estabilização da coluna vertebral e receberam propofol-remifentanil (Total Intravenous Anesthesia - TIVA) e sevoflurano-remifentanil foram comparados para identificar sua importância na previsão precoce de dor no pós-operatório. Métodos: Os pacientes foram monitorados com o uso de BIS e ANI juntamente com a monitoração padrão. Durante a indução, fentanil (2 µg.kg-1), propofol (2,5 mg.kg-1) e rocurônio (0,6 mg.kg-1) foram administrados. Durante a manutenção, 1 CAM de sevoflurano + remifentanil (0,05-0,3 µg.kg-1.min-1) e propofol (50-150 µg.kg-1.min-1) + remifentanil (0,05-0,3 µg.kg-1.min-1) foram administrados aos grupos S e T, respectivamente. Parâmetros hemodinâmicos, valores de BIS e ANI foram registrados durante a cirurgia e aos 30 minutos de pós-operatório. Os valores escala visual analógica (EVA) aos 30 minutos de pós-operatório foram registrados. Resultados: Enquanto não observamos diferença entre as médias do ANI em todos os tempos de mensuração de ambos os grupos, as mensurações do ANI após a administração do analgésico no perioperatório foram significativamente maiores do que os valores basais de ambos os grupos. Houve correlação entre as médias dos valores de ANI e EVA após a anestesia. Conclusão: ANI é um parâmetro importante para o monitoração de analgesia nos períodos perioperatório e pós-operatório. Na cirurgia da coluna vertebral, analgesia semelhante pode ser obtida com anestesia intravenosa total com remifentanil e com a administração de sevoflurano. O ANI é eficiente para prever a necessidade de analgesia durante o período pós-operatório imediato e, portanto, para proporcionar conforto ao paciente.

[Analgesia Nociception Index for perioperative analgesia monitoring in spinal surgery]. / Índice de analgesia/nocicepção para monitorização da analgesia perioperatória na cirurgia da coluna vertebral.

BACKGROUND AND OBJECTIVES: The Analgesia Nociception Index is an index used to measure the levels of pain, sympathetic system activity and heart rate variability during general anesthesia. In our study, Analgesia Nociception Index monitoring in two groups who had undergone spinal stabilization surgery and were administered propofol-remifentanil (Total Intravenous Anesthesia) and sevoflurane-remifentanyl anesthesia was compared regarding its significance for prediction of postoperative early pain. METHODS: BIS and Analgesia Nociception Index monitoring were conducted in the patients together with standard monitoring. During induction, fentanyl 2µg.kg-1, propofol 2.5mg.kg-1 and rocuronium 0.6mg.kg-1 were administered. During maintenance, 1.0 MAC sevoflurane+remifentanil 0.05-0.3µg.kg-1.min-1 and propofol 50-150µg.kg-1.min+remifentanil 0.05-0.3µg.kg-1.min-1 were administered in Group S and Group T, respectively. Hemodynamic parameters, BIS and Analgesia Nociception Index values were recorded during surgery and 30min postoperatively. Postoperative visual analog scale (VAS) values at 30minutes were recorded. RESULTS: While no difference was found between mean Analgesia Nociception Index at all times of measurement in both groups, Analgesia Nociception Index measurements after administration of perioperative analgesic drug were recorded to be significantly higher compared to baseline values in both groups. There was correlation between mean values of Analgesia Nociception Index and VAS after anesthesia. CONCLUSION: Analgesia Nociception Index is a valuable parameter for monitoring of perioperative and postoperative analgesia. In spine surgery, similar analgesia can be provided in both Total Intravenous Anesthesia with remifentanil and sevoflurane administration. Analgesia Nociception Index is efficient for prediction of the need for analgesia during the early postoperative period, and therefore is the provision of patient comfort.