The patient with a central venous catheter develops substernal chest pain, hypotension, and cough. There is evidence of air in the line. Which action does the nurse take first​?

The 4-week-old neonate in the neonatal intensive care unit was born at 29 weeks gestation. The patient is stable on room air and has been tolerating nasogastric feedings of expressed breast milk. Generally an active and responsive patient, the nurse notes the patient is lethargic and does not react to his diaper change. Additionally, the patient’s heart rate is 194 bpm, respiratory rate is 82 breaths per minute, and the blood pressure is 54/21 mm Hg. The patient’s abdomen is distended and discolored; dark green emesis is noted as well. An abdominal x-ray is ordered and performed. Which x-ray findings are consistent with the patient’s clinical picture? Select all that apply.  

The nurse is caring for a patient with left-sided weakness in the hospital who had vocal cord surgery this morning. Which intervention is most important to promote safety?