91. A 24-year-old woman, with history of recent upper respir…
91. A 24-year-old woman, with history of recent upper respiratory infection, was admitted to the ICU with a week of progressive ascending weakness. On initial examination she was awake, alert, oriented, and cooperative. She had quadriparesis and areflexia. She subsequently developed respiratory distress and was intubated. Head and cervical spine CT are read as normal. A lumber puncture is performed, which reveals the following CSF profile: 0 WBCs, 0 RBCs, Protein 120 mg/dL, and Glucose 80 mg/dL. What is the next best step in management?