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. After a client delivered vaginally 2 days ago, what information should you share with her if she wants to resume using her diaphragm for birth control?
- A. The diaphragm is the most effective form of contraception.
 - B. The diaphragm must be refitted after childbirth.
 - C. Vaseline lubricant should be used when inserting the diaphragm.
 - D. The diaphragm should be inserted 2 to 4 hours before intercourse.
 
Correct answer: B
Rationale: After childbirth, the diaphragm must be refitted to ensure a proper fit and effectiveness. Changes in the body post-delivery can affect the fit of the diaphragm, making it necessary to get refitted. Choice A is incorrect because while the diaphragm can be effective, it is not the most effective form of contraception. Choice C is incorrect because oil-based lubricants like Vaseline can damage latex diaphragms. Choice D is incorrect because the diaphragm should be inserted no more than 2 hours before intercourse, not 2 to 4 hours.
3. A 3-month-old with myelomeningocele and atonic bladder is catheterized every 4hrs to prevent urinary retention. The home health nurse notes that the child has developed episodes of sneezing, urticarial, watery eyes, and a rash in the diaper area. What action is most important for the nurse to take?
- A. Auscultate the lungs for respiratory pneumonia.
 - B. Change to latex-free gloves when handling infant.
 - C. Draw blood to analyze for streptococcal infection.
 - D. Apply zinc oxide to perineum with each diaper change.
 
Correct answer: B
Rationale: Latex allergy is a concern in patients with myelomeningocele, so switching to latex-free gloves is important.
4. After each feeding, a 3-day-old newborn is spitting up large amounts of Enfamil® Newborn Formula, a nonfat cow's milk formula. The pediatric healthcare provider changes the neonate's formula to Similac® Soy Isomil® Formula, a soy protein isolate-based infant formula. What information should the LPN/LVN provide to the mother about the newly prescribed formula?
- A. The new formula is a coconut milk formula used with babies with impaired fat absorption.
 - B. Enfamil® Formula is a demineralized whey formula that is needed with diarrhea.
 - C. The new formula is a casein protein source that is low in phenylalanine.
 - D. Similac® Soy Isomil® Formula is a soy-based formula that contains sucrose.
 
Correct answer: D
Rationale: The LPN/LVN should inform the mother that Similac® Soy Isomil® Formula is a soy-based formula containing sucrose. This formula is suitable for infants with cow's milk protein allergy or intolerance, which may be the reason for the newborn spitting up large amounts of the previous cow's milk formula.
5. The nurse is caring for a one-year-old child following surgical correction of hypospadias. Which nursing action has the highest priority?
- A. Monitor urinary output
 - B. Auscultate bowel sounds
 - C. Observe appearance of stool
 - D. Record percent of diet consumed
 
Correct answer: A
Rationale: In caring for a one-year-old child post hypospadias surgery, the highest priority action is to monitor urinary output. This is crucial to assess kidney function and ensure there are no complications following the surgical procedure. Auscultating bowel sounds, observing stool appearance, and recording diet consumption are important assessments too, but in this case, monitoring urinary output takes precedence due to the nature of the surgery and potential complications related to urinary function.
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