You have been called to a long-term care facility for a 77-year-old female patient who was found unresponsive in her wheelchair by staff. The nurse reports that the patient complained of a headache earlier in the day and was given 600 mg of Motrin. Your assessment shows the patient to be unresponsive with a patent airway, slow and irregular respirations, and a weak radial pulse. Her lips are cyanotic, and your partner reports the following vital signs: pulse, 44; respirations, 6 breaths/min; and blood pressure, 228/116 mmHg. Which action should be your next priority?

A) Start positive pressure ventilation
B) Check the patient's blood glucose level
C) Attach the pulse oximeter to get a SpO2 reading
D) Perform a prehospital stroke screen

A) Start positive pressure ventilation