A Patient Is Admitted to the Emergency Department with Severe

Multiple Choice

A patient is admitted to the emergency department with severe fatigue and confusion. Laboratory studies are done. Which laboratory value will require the most immediate action by the nurse?

A) Arterial blood pH is 7.32.
B) Serum calcium is 18 mg/dL.
C) Serum potassium is 5.1 mEq/L.
D) Arterial oxygen saturation is 91%.