The nurse prepares a continuous aminophylline infusion at 0.3 mg/kg/hr for a client weighing 165 pounds.

The bag is mixed with 500 mg of aminophylline in 250 mL of D5W.

At which rate should the nurse set the pump in mL/hr? Round the answer to the tenths place.

The clinical scenario involves a client experiencing neurological deficits from a transient ischemic attack who presents with specific pharmacological and chemical allergies. Applying knowledge of cross-sensitivity and radiopaque dye composition is essential to identify risks associated with iodine-based contrast media and morphine-codeine hypersensitivity.

Choice A rationale

Computed tomography scans with contrast utilize iodine-based dyes to enhance vascular visualization. Since the client has a documented iodine allergy, this order poses a significant risk of anaphylaxis or severe hypersensitivity reactions and requires urgent clarification with the provider.

Choice B rationale

Transient ischemic attacks are often linked to atherosclerosis and hypertension. A low-fat, low-cholesterol diet is a standard therapeutic intervention to manage lipid levels and prevent further plaque accumulation, making this a safe and appropriate non-pharmacological order.

Choice C rationale

Monitoring vital signs is a fundamental nursing responsibility during the acute phase of a neurological event. Frequent assessments help detect changes in blood pressure or heart rate, which are critical for maintaining cerebral perfusion and identifying potential deterioration.

Choice D rationale

Acetaminophen is a non-opioid analgesic that does not share chemical properties with morphine or codeine. Because it is not an opiate or salicylate, it is safe to administer for a headache in a patient allergic to opioids.

Managing acute decompensated heart failure requires understanding perfusion pressure and cardiovascular hemodynamics. Knowledge of mean arterial pressure and vasopressor pharmacology is necessary. The priority is maintaining vital organ perfusion when the MAP falls below critical thresholds required for cellular oxygenation.

Choice A rationale

Fluid boluses can exacerbate pulmonary edema in acute decompensated heart failure. While MAP is low, adding volume increases preload, which a failing left ventricle cannot pump, leading to further respiratory distress and worsening of the cardiac crisis.

Choice B rationale

Intubation addresses respiratory failure and oxygenation but does not directly correct the primary hemodynamic issue of low perfusion pressure. While it may become necessary, the immediate priority is restoring MAP to ensure coronary and renal perfusion.

Choice C rationale

High Fowler's position assists with oxygenation by reducing venous return and decreasing pulmonary congestion. However, in the presence of a dangerously low MAP of 55 mm Hg, this position may further decrease cerebral and systemic perfusion.

Choice D rationale

A MAP below 60 to 65 mm Hg indicates inadequate organ perfusion. Norepinephrine provides potent vasoconstriction and minimal inotropy, raising systemic vascular resistance to increase the MAP quickly, thereby protecting the brain, heart, and kidneys from ischemia..