Epidural analgesia is a widely used method of pain control in the labor and delivery setting but is not without risks. We present a case of Horner's syndrome and trigeminal nerve palsy as a rare complication of epidural analgesia in an obstetric patient. Although reported in few instances in the anesthesia literature, awareness among providers in obstetrics is critical because this could be the first sign of a high sympathetic blockade resulting in potential maternal-fetal morbidity.
Case ReportA healthy 25-year-old woman, gravida 2 para 1, was admitted to the hospital for active labor at 39 weeks gestation. Her past medical history was remarkable only for occasional migraine headaches, and her prenatal course, including labs, had been unremarkable. During an uneventful first stage of labor, epidural anesthesia was requested. A lumbar epidural catheter was placed at the interspace between the third and fourth lumbar vertebrae using a midline approach and a loss of resistance to saline through a 17-gauge Touhy needle. A test dose of 3 mL of 1.5% lidocaine with 5 g of epinephrine per milliliter was administered without appreciable evidence of either intravascular or intrathecal placement of the catheter. A bolus of 10 mL of 0.2% bupivacaine with 2 g of fentanyl per milliliter was administered over 10 minutes, and then an infusion of the same solution was started at 8 mL per hour. Approximately 20 minutes after epidural catheter placement, the patient complained that the left side of her face "felt funny." On evaluation by her family physician, the patient reported decreased sensation to light touch on the left cheek in the distribution of the maxillary branch of the trigeminal nerve and was observed to have miosis and ptosis on the left side. Pinprick demonstrated the level of analgesia at the fourth thoracic segment on the left and at the fifth thoracic segment on the right. The patient's grip strength was found to be normal, and she denied dyspnea. There were no other cranial nerve abnormalities or neurologic deficits appreciated.Simultaneously, the patient's blood pressure dropped from 115/68 mm Hg to a range of 90s/30s mm Hg for several minutes. After receiving 10 mg of ephedrine IV, her blood pressure returned to 110s/50s mm Hg, but her neurologic symptoms persisted. During this period, fetal monitoring was uneventful without decelerations or bradycardia. Due to concerns for these neurologic findings, the epidural infusion was stopped, and labor allowed to progress. About 30 minutes after stopping the infusion, the patient's symptoms of facial numbness, ptosis, and miosis resolved.Within the hour, the patient desired further pain control with epidural anesthesia. Therefore, she was repositioned, and an infusion of the same solution was started at 6 mL per hour without a bolus. This was followed by an uneventful progression of labor and vaginal delivery of a healthy male infant. No further signs or symptoms of Horner's syndrome or trigeminal nerve palsy were evident during the rest of this patient's labor, de...