The patient in the emergency department begins projectile vomiting. Which intervention is most important?  

The 24-year-old patient presents to the emergency department complaining of malaise and intractable sore throat with onset 24 hours previously. Upon assessment, the nurse notes swollen cervical lymph nodes and a temperature of 39.3°C. The patient denies nasal discharge or cough. Which question by the nurse is most important?

The patient is brought to the emergency department (ED) with sudden onset blindness and deafness. The patient is being guided in by his wife but is walking well. The nurse suspects the patient is experiencing which condition?