The 75-year-old patient presents to the emergency department complaining of a severe headache that is localized behind the right eye. The patient is nauseous and vomits upon standing. While wearing glasses, the visual acuity is 20/25 in the left eye and 20/110 in the right (records show it is normally also 20/25 corrected). Her left pupil is equal, round, and reactive to light and accommodation; it is measured at 3 mm. Her right pupil reacts only minimally to light and measures at 5 mm; it is round. The provider palpates the eye and reports that it is tense. Her heart rate is 102 bpm and blood pressure is 118/84 mmHg. The nurse anticipates providing which intervention first?  

The 20-year-old healthy soccer player is brought to the emergency department after collapsing at the end of a summer soccer game. The patient is lethargic and confused about the event. Upon assessment, the nurse notes flushed, dry skin that is warm to the touch. The oral mucosa is dry, as well. Vitals are as follows: temperature 40.7°C, heart rate 122 bpm, respiratory rate 20, and blood pressure 116/64 mm Hg. A rectal thermistor is inserted and aggressive cooling measures are instituted. After 30 minutes in the ice bath, the patient’s rectal temperature is 39.1°C and the ice is partially melted. The nurse notes the rectal thermistor has stopped working; there are no other rectal thermistors in the facility. Which action by the nurse is most appropriate? 

The botulinum neurotoxin acts on which neurotransmitter to produce flaccid paralysis?