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 male infant with a 2-day history of fever and diarrhea is brought to the clinic by his mother, who tells the nurse that the child refuses to drink anything. The nurse determines that the child has a weak cry with no tears. Which intervention is most important to implement?
- A. Provide a bottle of electrolyte solution.
- B. Infuse normal saline intravenously.
- C. Administer an antipyretic rectally.
- D. Apply an external cooling blanket.
Correct answer: B
Rationale: Infusing normal saline intravenously is crucial to treat dehydration caused by fever and diarrhea. In this scenario, the infant's weak cry with no tears indicates severe dehydration, necessitating rapid fluid replacement via intravenous normal saline to restore fluid balance and prevent complications.
3. The healthcare provider is reviewing the serum laboratory findings for a 5-day-old infant with congenital adrenal hyperplasia. Which laboratory result should be reported to the healthcare provider immediately?
- A. Bilirubin of 1.5 mg/dl.
- B. Glucose of 80 mg/dl.
- C. Potassium of 4.5 mEq/L.
- D. Sodium of 119 mEq/L.
Correct answer: D
Rationale: Low sodium levels in congenital adrenal hyperplasia can indicate salt-wasting crisis, which is a life-threatening emergency requiring immediate medical attention. Monitoring sodium levels is crucial to prevent complications such as dehydration and shock in these patients.
4. An infant delivered vaginally by an HIV-positive mother is admitted to the newborn nursery. What intervention should the healthcare provider perform first?
- A. Bathe the infant with an antimicrobial soap.
- B. Measure the head and chest circumference.
- C. Obtain the infant's footprints.
- D. Administer vitamin K (AquaMEPHYTON).
Correct answer: A
Rationale: The initial intervention should be to bathe the infant with an antimicrobial soap to reduce the risk of HIV transmission from maternal fluids. This immediate action helps minimize potential exposure to the virus and promotes infection control practices in the care of infants born to HIV-positive mothers. Choice B, measuring head and chest circumference, is important for assessing growth and development but not the priority in this scenario. Choice C, obtaining footprints, is a routine procedure but not a priority over infection control measures. Choice D, administering vitamin K, is important for clotting factors but does not address the immediate risk of HIV transmission.
5. A new mother who is breastfeeding her 4-week-old infant and has type 1 diabetes reports that her insulin needs have decreased since the birth of her child. Which action should the nurse implement?
- A. Inform her that a decreased need for insulin occurs while breastfeeding.
- B. Counsel her to increase her caloric intake.
- C. Advise the client to breastfeed more frequently.
- D. Schedule an appointment for the client with the diabetic nurse educator.
Correct answer: A
Rationale: The correct answer is A. During breastfeeding, insulin needs often decrease due to the metabolic demands of milk production. Therefore, the nurse should inform the client that this decrease in insulin requirements is a normal response to breastfeeding. Choice B is incorrect as increasing caloric intake is not directly related to the decrease in insulin needs during breastfeeding. Choice C is incorrect as advising the client to breastfeed more frequently does not address the issue of decreased insulin needs. Choice D is incorrect as scheduling an appointment with the diabetic nurse educator is not necessary at this point since the decreased need for insulin is a common physiological response to breastfeeding.
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