In case of severe pain VNS of 7 or higher in post anesthesia care unit PACU that did not respond to a rescue bolus of 10 ml of 2 % lidocaine, intravenous analgesia with tramadol or morphine was started and the patient was excluded from the study, as it was considered that it was a failed epidural analgesia.
En caso de dolor severo EVN de 7 o mayor en recuperación postanestésica que no respondiera a un bolo de rescate con lidocaína 2 % de 10 ml, se inició analgesia de rescate intravenosa con tramadol o morfina, y el paciente fue retirado del estudio por considerarse fallida la analgesia epidural.