Rev. Soc. Esp. Dolor. 2022; 29(3): 132-139 / DOI: 10.20986/resed.2022.4039/2022
A. Sultan Wesameldin, S. Ibrahem Ezzeldin, A. Elbakry Abd-Elazeem
ABSTRACT
Objective: The aim of this study was to investigate the relationship between the intrathecal dose of hyperbaric bupivacaine and the incidence and severity of post spinal shivering in parturients undergoing cesarean section.
Material and methods: A hundred full term pregnant ladies undergoing elective cesarian section were randomized into two equal groups according to bupivacaine dose given for spinal anesthesia. low dose bupivacaine group (LB group) and high dose bupivacaine group (HB group) received 8 mg and 10mg bupivacaine respectively. The incidence and severity of shivering were recorded as primary outcomes. Other measurements were heart rate, mean arterial blood pressure, tympanic membrane temperature, sensory block level.
Results: The level of spinal block was higher in HB group compared with LB group (p = 0.02). The incidence of intra-operative shivering was 15 (30 %) in HB group and 10 (20 %) in LB group (p = 0.032) while the shivering scores were not significant. The incidence of postoperative shivering was 16 (32 %) in HB group and 11 (22 %) in LB group (p = 0.043). Intra-operative tympanic membrane temperatures showed a highly significant reduction from the baseline (p < 0.0001) while postoperative values showed no significant difference from the baseline.
Conclusions: The level of the spinal block rather than the dose of intrathecal bupivacaine affects the incidence of shivering. At low levels of the spinal block the incidence of shivering is decreased with no effect on the degree of shivering.
RESUMEN
Objetivo: El objetivo de este estudio fue investigar la relación entre la dosis intratecal de bupivacaína hiperbárica y la incidencia y severidad de los escalofríos postespinales en parturientas sometidas a cesárea.
Material y métodos: Cien mujeres embarazadas a término que se sometieron a una cesárea electiva se distribuyeron aleatoriamente en dos grupos iguales de acuerdo con la dosis de bupivacaína administrada para la anestesia espinal. El grupo de bupivacaína de dosis baja (grupo LB) y el grupo de bupivacaína de dosis alta (grupo HB) recibieron 8 mg y 10 mg de bupivacaína respectivamente. La incidencia y la gravedad de los escalofríos se registraron como resultados primarios. Otras mediciones fueron la frecuencia cardiaca, la presión arterial media, la temperatura de la membrana timpánica y el nivel de bloqueo sensorial.
Resultados: El nivel de bloqueo espinal fue mayor en el grupo HB en comparación con el grupo LB (p = 0,02). La incidencia de escalofríos intraoperatorios fue de 15 (30 %) en el grupo HB y de 10 (20 %) en el grupo LB (p = 0,032), mientras que las puntuaciones de escalofríos no fueron significativas. La incidencia de escalofríos postoperatorios fue de 16 (32 %) en el grupo HB y de11 (22 %) en el grupo LB (p = 0,043). Las temperaturas intraoperatorias de la membrana timpánica mostraron una reducción muy significativa con respecto a la línea de base (p < 0,0001), mientras que los valores postoperatorios no mostraron diferencias significativas con respecto a la línea de base.
Conclusiones: El nivel de bloqueo espinal más que la dosis de bupivacaína intratecal afecta la incidencia de escalofríos. A niveles bajos de bloqueo espinal, la incidencia de escalofríos disminuye sin efecto sobre el grado de escalofríos.
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