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 pregnant woman in her first trimester is experiencing watery vaginal discharge. What should the nurse tell her?
- A. Inform her that it is normal.
- B. Advise her to see a doctor immediately.
- C. Suggest using panty liners.
- D. Suggest a change in diet.
Correct answer: A
Rationale: Informing the pregnant woman that watery vaginal discharge is normal during the first trimester is crucial to providing reassurance and reducing anxiety. This discharge, known as leukorrhea, is common during pregnancy due to increased estrogen levels and increased blood flow to the pelvic area. It helps maintain a healthy balance of bacteria in the vagina and protects the birth canal from infection. Advising the woman to see a doctor immediately may cause unnecessary alarm, while suggesting the use of panty liners can help manage the discharge comfortably. Suggesting a change in diet is not relevant to addressing watery vaginal discharge in this scenario.
3. The client at 10 weeks' gestation is palpated with the fundus at 3 fingerbreadths above the pubic symphysis. The client reports nausea, vomiting, and scant dark brown vaginal discharge. What action should the nurse take?
- A. Collect a urine sample for urinalysis.
- B. Measure vital signs.
- C. Recommend bed rest.
- D. Obtain human chorionic gonadotropin levels.
Correct answer: D
Rationale: In a pregnant client with a fundal height greater than expected at 10 weeks and experiencing scant dark brown vaginal discharge, there is a concern for a molar pregnancy. Assessing human chorionic gonadotropin (hCG) levels is crucial in this situation to confirm or rule out this condition.
4. A breastfeeding infant, screened for congenital hypothyroidism, is found to have low levels of thyroxine (T4) and high levels of thyroid-stimulating hormone (TSH). What is the best explanation for this finding?
- A. The thyroxine level is low because the TSH level is high.
- B. High thyroxine levels do not normally occur in breastfeeding infants.
- C. The thyroid gland does not produce normal levels of thyroxine for several weeks after birth.
- D. The TSH is high because of the low production of T4 by the thyroid.
Correct answer: D
Rationale: High TSH and low T4 levels indicate that the thyroid gland is not producing enough hormones, which is a sign of congenital hypothyroidism. In this case, the high TSH is a compensatory response by the body to stimulate the thyroid to produce more T4. Choice A is incorrect because TSH does not directly affect T4 levels; rather, it is the other way around where low T4 levels lead to high TSH levels. Choice B is incorrect because high thyroxine levels are not expected in congenital hypothyroidism. Choice C is incorrect as the thyroid gland should be producing normal levels of thyroxine shortly after birth, making this explanation unlikely in the context of congenital hypothyroidism.
5. A client at 32-weeks gestation is diagnosed with preeclampsia. Which assessment finding is most indicative of an impending convulsion?
- A. 3+ deep tendon reflexes and hyperreflexia.
- B. Periorbital edema, flashing lights, and aura.
- C. Epigastric pain in the third trimester.
- D. Recent decreased urinary output.
Correct answer: A
Rationale: In a client with preeclampsia, 3+ deep tendon reflexes and hyperreflexia are indicative of severe preeclampsia. These neurological signs suggest an increased risk for seizures, making option A the most indicative of an impending convulsion. Choices B, C, and D are not directly associated with an impending convulsion in a client with preeclampsia.
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