Ms. B is а 68-yeаr оld wоmаn admitted tо the medical unit through the emergency department after being hit in the abdomen by an automobile while walking home. She has a history of adrenal gland disorder. An 18-gauge IV catheter was inserted and normal saline was started at 100 mL/hr. ED vital signs were: BP 118/80 mm Hg; HR 82 beats/minResp 26 breaths/min; Oral temp 98.4 degrees F Ms. B has a small dressing to a wound on her right side with a small amount of serosanguinous drainage present. Her laboratory values from the ED were as follows: Aldosterone level 3 ng/dL (low) Cortisol level 2 mcg/dL (low) Potassium 5.2 mEq/L Sodium 136 mEq/L Ms. B tells the assistive personnel (AP) she is feeling weakness, fatigue, and abdominal pain. She is nauseated and has just vomited 560 mL of greenish fluid. The AP informs the RN that Ms. B's BP is now 84/50 mm Hg. Which prescribed action would the nurse implement first?