J. B. is a 58-year-old retired postal worker who has been on your floor for several days receiving plasmapheresis qod for myasthenia gravis (MG). Before this admission, he had been relatively healthy. His medical Hx includes HTN controlled with verapamil and glaucoma treated with timolol (ophthalmic preparation). About a year ago, J. B. started experiencing difficulty chewing and swallowing, diplopia, and slurring of speech, at which time he was placed on pyridostigmine (Mestinon). Recently J. B. was diagnosed with a sinus infection and treated with ciprofloxacin. On admission, J. B. was unable to bear any weight or take fluids through a straw. There have been periods of exacerbation and remission since admission. You note that the nursing assistive personnel (NAP) has just entered these vital signs into J. B.'s record. What is your immediate concern and why?