HESI LPN
HESI Fundamentals Exam
1. The healthcare professional prepares a 1,000 ml IV of 5% dextrose and water to be infused over 8 hours. The infusion set delivers 10 drops per milliliter. The healthcare professional should regulate the IV to administer approximately how many drops per minute?
- A. 80
- B. 8
- C. 21
- D. 25
Correct answer: C
Rationale: To calculate the drops per minute for the IV infusion, first determine the total drops to be infused over 8 hours. 1,000 ml to be infused over 8 hours means 125 ml per hour (1000 ml / 8 hours = 125 ml/hr). Since the infusion set delivers 10 drops per ml, 125 ml/hr x 10 drops/ml = 1250 drops/hr. To find drops per minute, divide the drops per hour by 60 (minutes in an hour): 1250 drops/hr / 60 minutes = 20.83 drops/minute, which rounds up to 21 drops per minute (Option C). This rate ensures the correct infusion rate over 8 hours. Choices A, B, and D are incorrect calculations and do not provide the appropriate infusion rate needed to administer the IV over the specified time period.
2. A healthcare professional is planning to obtain the vital signs of a 2-year-old child who is experiencing diarrhea and who might have a right ear infection. Which of the following routes should the healthcare professional use to obtain the temperature?
- A. Temporal
- B. Oral
- C. Rectal
- D. Axillary
Correct answer: C
Rationale: In a 2-year-old child with diarrhea and a possible ear infection, rectal temperature measurement is the most accurate reflection of core body temperature. This method provides the most reliable reading, especially in young children, as it closely reflects the core body temperature. Oral temperature may not be accurate due to the child's recent diarrhea, which can affect oral readings. Axillary temperature may not be as accurate as rectal temperature in this case. Temporal temperature measurement, although non-invasive, may not provide the most accurate core body temperature reading, especially in a child with a potential ear infection.
3. A nurse is preparing to administer ketorolac 0.5 mg/kg IV bolus every 6 hr to a school-age child who weighs 66 lb. The available ketorolac injection is 30 mg/mL. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
- A. 0.5 mL
- B. 1 mL
- C. 1.5 mL
- D. 2 mL
Correct answer: A
Rationale: To calculate the dose, first convert the weight from pounds to kilograms. The child weighs 66 lb, which is approximately 30 kg. The prescribed dose is 0.5 mg/kg, so for a 30 kg child, the dose would be 0.5 mg/kg x 30 kg = 15 mg. Since the available ketorolac injection is 30 mg/mL, the nurse should administer 15 mg ÷ 30 mg/mL = 0.5 mL per dose. Therefore, choice A (0.5 mL) is the correct answer. Choices B, C, and D are incorrect as they do not accurately calculate the correct dose based on the child's weight and the concentration of the ketorolac injection.
4. During assessment, what is an indication of thrombophlebitis in a client who has been on bed rest for the past month?
- A. Calf swelling
- B. Elevated blood pressure
- C. Decreased urine output
- D. Generalized rash
Correct answer: A
Rationale: Calf swelling is a common sign of thrombophlebitis, which is inflammation of a vein due to a blood clot. Prolonged immobility can predispose individuals to thrombophlebitis. Calf swelling occurs due to the obstruction of blood flow, causing localized edema. This condition can lead to serious complications like pulmonary embolism if not promptly addressed. Elevated blood pressure, decreased urine output, and a generalized rash are not typically associated with thrombophlebitis. Elevated blood pressure may be linked to other conditions like hypertension, decreased urine output to kidney dysfunction, and a generalized rash to allergic reactions or skin conditions. Therefore, in a client on bed rest, calf swelling should raise suspicion of thrombophlebitis and prompt further evaluation and intervention.
5. During a follow-up visit, a home health nurse notices that a client with a gastrostomy tube, who receives intermittent feedings and medications, has developed diarrhea. Which of the following findings should the nurse identify as a possible cause of the diarrhea?
- A. The client’s caregiver washes out the feeding bag once every 24 hours with warm water.
- B. The client’s caregiver washes out the feeding bag with hot water every 24 hours.
- C. The client’s caregiver changes the feeding bag every 48 hours.
- D. The client’s caregiver adds water to the formula before administration.
Correct answer: A
Rationale: The correct answer is A. Washing out the feeding bag once every 24 hours with warm water can lead to bacterial growth due to inadequate cleaning, potentially causing diarrhea. Hot water, as in choice B, can also promote bacterial growth, which is not desirable. Changing the feeding bag every 48 hours, like in choice C, is within an acceptable timeframe and is unlikely to be a cause of diarrhea. Adding water to the formula before administration, as in choice D, is a common practice to dilute the formula but is not typically associated with causing diarrhea in this scenario.
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