HESI RN
RN HESI Pharmacology Exam 3 Questions
Extract:
Question 1 of 5
The healthcare provider prescribes magnesium sulfate 300 mg/hour IV. The IV bag contains magnesium sulfate 4 grams in dextrose 5% in water (D5W) 500 mL. How many mL/hour should the nurse set the infusion pump? (Enter numerical value only. If rounding is required, round to the nearest tenth.)
Correct Answer: 37.5
Rationale: Convert 4 grams to 4000 mg. Infusion rate = (300 mg/hr) ÷ (4000 mg/500 mL) = 300 × 500 ÷ 4000 = 37.5 mL/hr. The pump should be set to 37.5 mL/hr.
Question 2 of 5
Which intervention is most important for the nurse to implement for a client with type 2 diabetes mellitus (DM) who is receiving insulin lispro?
Correct Answer: C
Rationale: Insulin lispro, rapid-acting, peaks 1-2 hours post-dose, requiring meals shortly after administration to prevent hypoglycemia. Synchronizing meal timing with insulin is critical. Glucose monitoring, hypoglycemia checks, and glucose sources are supportive but secondary.
Question 3 of 5
The nurse is caring for an adult client who is taking carbidopa-levodopa for Parkinson's disease. The client is concerned that the medication is not working. Which intervention should the nurse implement first?
Correct Answer: A
Rationale: Clarifying the client’s concern about carbidopa-levodopa’s effectiveness guides targeted assessment and intervention. Meal timing, dyskinesia, or urine color are secondary until the specific issue is understood.
Question 4 of 5
The nurse is administering sodium polystyrene sulfonate to a client in acute kidney injury (AKI). Which laboratory finding indicates that the medication has been effective? Reference Range: Glucose [74 to 106 mg/dL (4.1 to 5.9 mmol/L)] Hemoglobin [14 to 18 g/dL (140 to 180 g/L)] Potassium [3.5 to 5 mEq/L (3.5 to 5 mmol/L)] Ammonia [10 to 80 pg/dL (6 to 47 μmol/dL)]
Correct Answer: C
Rationale: Sodium polystyrene sulfonate lowers potassium by exchanging sodium for potassium in the gut. A potassium level of 3.8 mEq/L (normal range) indicates effective hyperkalemia treatment in AKI. Ammonia, hemoglobin, and glucose are unaffected by this medication.
Question 5 of 5
The nurse is reviewing the client's laboratory values. Which serum laboratory value indicates to the nurse that a prescription for atorvastatin is having the desired effect for a client at risk for coronary artery disease?
Correct Answer: D
Rationale: Atorvastatin lowers LDL cholesterol, reducing coronary artery disease risk. Decreased LDL levels indicate effectiveness. HDL, PT, and CK are not primary measures of atorvastatin’s therapeutic effect.