HESI RN
HESI Maternity Test Bank
1. The healthcare provider prescribes magnesium sulfate 6 grams intravenously (IV) to be infused over 20 minutes for a client with preterm labor. The IV bag contains magnesium sulfate 20 grams in dextrose 5% in water 500 mL. How many mL/hour should the nurse set the infusion pump?
- A. 150 mL/hour
- B. 250 mL/hour
- C. 50 mL/hour
- D. 275 mL/hour
Correct answer: A
Rationale: To calculate the infusion rate, first, determine the total volume to be infused (6 grams of magnesium sulfate) over a specific time frame (20 minutes). Then, calculate the concentration of magnesium sulfate in the IV bag to determine the mL/hour rate. The IV bag contains 20 grams of magnesium sulfate in 500 mL of solution, which means there are 4 grams of magnesium sulfate per 100 mL. Since 6 grams are required, the nurse should set the pump to deliver 150 mL/hour to infuse the prescribed dose over 20 minutes. Choice B, 250 mL/hour, is incorrect because it miscalculates the amount of magnesium sulfate infused per hour. Choice C, 50 mL/hour, is incorrect as it is too slow to deliver the required dose in the specified time frame. Choice D, 275 mL/hour, is incorrect as it overestimates the infusion rate and would deliver the dose too quickly.
2. A client at 32 weeks gestation is hospitalized with severe pregnancy-induced hypertension (PIH), and magnesium sulfate is prescribed to control the symptoms. Which assessment finding indicates the therapeutic drug level has been achieved?
- A. 4+ reflexes
- B. Urinary output of 50 ml per hour
- C. A decrease in respiratory rate from 24 to 16
- D. A decreased body temperature
Correct answer: C
Rationale: A decrease in respiratory rate from 24 to 16 indicates that magnesium sulfate is effectively reducing central nervous system irritability, a desired therapeutic effect. This decrease in respiratory rate signifies that the drug has reached a therapeutic level to control symptoms of severe pregnancy-induced hypertension. Choices A, B, and D are incorrect because 4+ reflexes, urinary output, and body temperature are not direct indicators of achieving a therapeutic level of magnesium sulfate for controlling PIH symptoms.
3. The nurse is caring for a 5-year-old child with Reye’s syndrome. Which goal of treatment most clearly relates to caring for this child?
- A. Reduce cerebral edema and lower intracranial pressure
- B. Avert hypotension and septic shock
- C. Prevent cardiac arrhythmias and heart failure
- D. Promote kidney perfusion and normal blood pressure
Correct answer: A
Rationale: Reducing cerebral edema and lowering intracranial pressure is the primary goal of treatment for Reye’s syndrome.
4. A 36-week primigravida is admitted to labor and delivery with severe abdominal pain and bright red vaginal bleeding. Her abdomen is rigid and tender to touch. The fetal heart rate (FHR) is 90 beats/minute, and the maternal heart rate is 120 beats/minute. What action should the nurse implement first?
- A. Alert the neonatal team and prepare for neonatal resuscitation
- B. Notify the healthcare provider from the client’s bedside
- C. Obtain written consent for an emergency cesarean section
- D. Draw a blood sample for stat hemoglobin and hematocrit
Correct answer: B
Rationale: In this scenario, the priority action for the nurse is to notify the healthcare provider from the client's bedside. The clinical presentation of severe abdominal pain, bright red vaginal bleeding, rigid and tender abdomen, along with fetal bradycardia (FHR 90 bpm) and maternal tachycardia (120 bpm) indicates an urgent need for medical intervention. Notifying the healthcare provider promptly allows for immediate assessment and decision-making to address the critical condition and ensure timely and appropriate management for both the mother and fetus.
5. One hour after giving birth to an 8-pound infant, a client's lochia rubra has increased from small to large, and her fundus is boggy despite massage. The client's pulse is 84 beats/minute, and blood pressure is 156/96. The healthcare provider prescribes Methergine 0.2 mg IM × 1. What action should the healthcare provider take immediately?
- A. Give the medication as prescribed and monitor for efficacy.
- B. Encourage the client to breastfeed rather than bottle-feed.
- C. Have the client empty her bladder and massage the fundus.
- D. Call the healthcare provider to question the prescription.
Correct answer: D
Rationale: The correct action for the healthcare provider to take immediately is to call the healthcare provider to question the prescription. Methergine is contraindicated in clients with hypertension due to its potential to elevate blood pressure further. In this scenario, the client's blood pressure is already elevated at 156/96, making it unsafe to administer Methergine. The LPN/LVN should advocate for the client's safety by questioning the prescription to prevent potential harm.
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